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WO2025151420A1 - Cônes d'augmentation de genou empilables - Google Patents

Cônes d'augmentation de genou empilables

Info

Publication number
WO2025151420A1
WO2025151420A1 PCT/US2025/010571 US2025010571W WO2025151420A1 WO 2025151420 A1 WO2025151420 A1 WO 2025151420A1 US 2025010571 W US2025010571 W US 2025010571W WO 2025151420 A1 WO2025151420 A1 WO 2025151420A1
Authority
WO
WIPO (PCT)
Prior art keywords
cone
primary
distal end
augment
stackable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/US2025/010571
Other languages
English (en)
Inventor
Jesse HEGGS
John Green
Jr. Stuart L. Axelson
Rachel PATEL
Greg Klein
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Encore Medical LP
Original Assignee
Encore Medical LP
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Encore Medical LP filed Critical Encore Medical LP
Publication of WO2025151420A1 publication Critical patent/WO2025151420A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/30721—Accessories
    • A61F2/30734—Modular inserts, sleeves or augments, e.g. placed on proximal part of stem for fixation purposes or wedges for bridging a bone defect
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/16—Instruments for performing osteoclasis; Drills or chisels for bones; Trepans
    • A61B17/164—Instruments for performing osteoclasis; Drills or chisels for bones; Trepans intramedullary
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/16—Instruments for performing osteoclasis; Drills or chisels for bones; Trepans
    • A61B17/1659—Surgical rasps, files, planes, or scrapers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/16—Instruments for performing osteoclasis; Drills or chisels for bones; Trepans
    • A61B17/1662—Instruments for performing osteoclasis; Drills or chisels for bones; Trepans for particular parts of the body
    • A61B17/1675—Instruments for performing osteoclasis; Drills or chisels for bones; Trepans for particular parts of the body for the knee
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30003—Material related properties of the prosthesis or of a coating on the prosthesis
    • A61F2002/30004—Material related properties of the prosthesis or of a coating on the prosthesis the prosthesis being made from materials having different values of a given property at different locations within the same prosthesis
    • A61F2002/30011—Material related properties of the prosthesis or of a coating on the prosthesis the prosthesis being made from materials having different values of a given property at different locations within the same prosthesis differing in porosity
    • A—HUMAN NECESSITIES
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30108—Shapes
    • A61F2002/30199—Three-dimensional shapes
    • A61F2002/30205—Three-dimensional shapes conical
    • A61F2002/30215—Stepped cones, i.e. having discrete diameter changes
    • A—HUMAN NECESSITIES
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30108—Shapes
    • A61F2002/30199—Three-dimensional shapes
    • A61F2002/30205—Three-dimensional shapes conical
    • A61F2002/30217—Three-dimensional shapes conical hollow cones, e.g. tubular-like cones
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
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    • A61F2002/30317—The prosthesis having different structural features at different locations within the same prosthesis
    • A61F2002/30327—The prosthesis having different structural features at different locations within the same prosthesis differing in diameter
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
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    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30331—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30331—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
    • A61F2002/30332—Conically- or frustoconically-shaped protrusion and recess
    • A61F2002/30336—Stepped cones, i.e. having discrete diameter changes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30331—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
    • A61F2002/30362—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit with possibility of relative movement between the protrusion and the recess
    • A61F2002/30364—Rotation about the common longitudinal axis
    • A61F2002/30367—Rotation about the common longitudinal axis with additional means for preventing said rotation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30537—Special structural features of bone or joint prostheses not otherwise provided for adjustable
    • A61F2002/30538—Special structural features of bone or joint prostheses not otherwise provided for adjustable for adjusting angular orientation
    • A61F2002/3054—Special structural features of bone or joint prostheses not otherwise provided for adjustable for adjusting angular orientation about a connection axis or implantation axis for selecting any one of a plurality of radial orientations between two modular parts, e.g. Morse taper connections, at discrete positions, angular positions or continuous positions
    • A—HUMAN NECESSITIES
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
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    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30599—Special structural features of bone or joint prostheses not otherwise provided for stackable
    • A—HUMAN NECESSITIES
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
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    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30604—Special structural features of bone or joint prostheses not otherwise provided for modular
    • A—HUMAN NECESSITIES
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
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    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30604—Special structural features of bone or joint prostheses not otherwise provided for modular
    • A61F2002/30607—Kits of prosthetic parts to be assembled in various combinations for forming different prostheses
    • A—HUMAN NECESSITIES
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
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    • A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30604—Special structural features of bone or joint prostheses not otherwise provided for modular
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    • A—HUMAN NECESSITIES
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
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    • A61F2002/30736—Augments or augmentation pieces, e.g. wedges or blocks for bridging a bone defect
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
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    • A61F2/02—Prostheses implantable into the body
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    • A61F2002/3093—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth for promoting ingrowth of bone tissue
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/3094—Designing or manufacturing processes
    • A61F2002/30985—Designing or manufacturing processes using three dimensional printing [3DP]

Definitions

  • the present invention relates to revision cones. More particularly, the present application describes systems of modular symmetric cones and an augment(s) which can be mated with the symmetric main body cone in order to create an asymmetric cone.
  • a purpose of the stackable knee augment cone system is to provide additional fixation and support to the implants after a primary knee component has been removed and left a void(s) in the bone as well as degraded bone quality and a variety of other complications.
  • a stackable cone system can be used with a universal baseplate systems but may be used with other systems depending on sizing requirements and compatibility with other implants the cone system can accommodate, or be adapted to accommodate.
  • implants relating to a knee can use a single cone.
  • a single cone may be limiting in some instances where a void is not suitably filled, and the bone and implant are not sufficiently supported, by a single cone.
  • Having numerous differently sized cones available may not be feasible or cost effective.
  • the size of the right cone to use may not be known until the surgery is in progress.
  • Innovations disclosed include stackable cone systems which can include cones coupled together to create taller cone assemblies for use in both the tibia and femur, and the cones used in a stackable cone assembly may be determined at the time of the surgery.
  • Use of a stackable cone system can increase the likelihood that the cones assembly can sufficiently be implemented, especially in instances when a larger void exists or is created in the tibia or femur.
  • the stackable cone systems may include one or more cones. In some embodiments, the cones are symmetric.
  • a set of cones used in a stackable augment cone system can be configured to couple together in various ways using various structures, certain examples being described herein. In other examples, other structures can be used to couple the cones together.
  • One embodiment of a stackable cone system includes the locking design that has a taper lock tab/window, for example, between a primary cone and a second cone, and/or a second cone and a third cone.
  • Another embodiment of a stackable cone system includes a taper lock inlet ring.
  • the distal end of a primary cone includes a first configuration of a taper lock inlet ring and the proximal end of a second cone includes a second configuration of a taper lock inlet ring, where the first configuration and the second configuration are structured to fit (or mate) together.
  • the first configuration of a taper lock inlet ring is structured as a “male” inlet ring and the second configuration of a taper lock inlet ring is structured as a “female” inlet ring.
  • the first configuration of a taper lock inlet ring is structured as a “female” inlet ring and the second configuration of a taper lock inlet ring is structured as a “male” inlet ring.
  • the stackable cone systems can include a primary cone (or “top” cone) that has relatively more complex geometry, and smaller mating cones of relatively simpler geometry.
  • Stackable cone system having smaller and less complex mating cones may allow for a lower inventory option of the primary cones as one or more stacking cones can be used for sizing requirements.
  • stackable augment cone systems are described herein as relating to implants for a knee (that is, either one or both of a tibia and a femur), such systems can be used in other suitable bones of the human to facilitate an implant.
  • One innovation includes a stackable augment cone assembly, comprising: a primary cone including a cone body having a proximal end, a distal end, and a cone wall extending between the proximal end and the distal end, the cone wall at least partially surrounding a first volume, and a plurality of first coupling features positioned on the distal end of the cone wall; and a second cone including a cone body having a proximal end, a distal end, and a cone wall at least partially surrounding a second volume extending between the proximal end and the distal end of the second cone, the second cone further including a second set of coupling features positioned along the second cone proximal end, the second set of coupling features on the proximal end of the second cone structured to couple to the first set of coupling features on the distal end of the primary cone.
  • Embodiments of the stackable augment cone assembly system can include one or more features described herein, and/or illustrated in the figures.
  • the primary cone proximal end and distal end each include an opening around a first longitudinal axis of the primary cone
  • the second cone proximal end and distal end each include an opening around a second longitudinal axis of the second cone
  • the stackable cone assembly system is configured such that the first longitudinal axis is aligned with the second longitudinal axis when the second cone is coupled to the first cone.
  • the primary cone further includes one or more extraction slots along the edge of the distal end of the cone body.
  • the primary cone further includes one or more cutouts in the cone wall extending from the proximal end of the cone body towards the distal end the cone body.
  • the primary cone further includes two cutouts in the cone wall, and the two cutouts may be positioned on opposite sides of the cone body, the cutouts having a length li and a width wi.
  • the cutouts in the primary cone can be configured to receive an augment, as described in reference to Figures 61 and 6 J.
  • the primary cone further includes one or more tabs extending distally from the cone wall on the distal end of the cone body.
  • Figure 11 A illustrates a top perspective view of the second cone of a cone system similar to the example of Figure 10A, where in this example, the proximal end of the second cone includes a male inlet ring and the distal end of the second cone includes a female inlet ring.
  • Figure 11 A also illustrates lines DD-DD that define a plane that bisects the second cone.
  • Figure 11D illustrates a top and side perspective view of the second cone shown in the example of Figure 11 A.
  • Figure 1 IE illustrates a bottom and side perspective view of the second cone shown in the example of Figure 11 A.
  • Figure 1 IF illustrates a top elevation view of the second cone shown in the example of Figure 11 A.
  • Figure 11 G illustrates a bottom elevation view of the second cone shown in the example of Figure 11A illustrating the distal end of the cone.
  • the distal end of the second cone is configured to include a female inlet ring.
  • Figure 12 illustrates an example of a side perspective view of another embodiment of a stackable cone system where the primary cone includes a “male-configured” inlet ring and the second cone includes a “female-configured” inlet ring.
  • Figure 13 illustrates an example of a bottom elevation view of the primary cone illustrated in Figure 12.
  • Figure 14 illustrates an example of a side perspective view of the second cone illustrated in Figure 12.
  • a primary cone will be proximal in the tibia (closer to the knee) and the one or more mating cones will be distal in the tibia (farther away from the knee).
  • their orientation will be flipped such that the primary cone in the femur is positioned proximal (and closer to the knee) and the one or more mating cones (e.g., a second cone, or a second and a third cone) in the femur are positioned distal (farther away from the knee).
  • the primary cone may have larger cutouts and tighter geometric constraints in order to accommodate tibial or femoral implant components.
  • the other cones can have various heights (from proximal end to distal end) in various embodiments for various uses, and can be configured only with enough height to have the mating geometry of the different embodiments. For example, if a primary cone is one inch in height, a stacking cone must accommodate the diameter of the female mating inlet on the primary cone with its male taper but may be less than an inch or more (but more likely less) depending on desires/needs from surgeons.
  • the stacking cones have the ability to stack into and be stacked into resulting in a variety of different combinations depending on what sizes and heights are determined to be relevant to the market and appropriate per the sizing study.
  • Embodiments include a locking taper tab and window, and a locking taper ring and inlet - these embodiments are illustrated in the figures.
  • the taper inlet is taken from the dual mobility concepts and includes the same “twist and drop” features. Scallops for alignment and then taper lock rings male and female.
  • the inlet ring can have multiple cutouts (e.g., “female” scallop-shaped cutouts) for alignment and one or more cutouts for extraction (e.g., two cutouts for extraction) to accommodate male protrusions (for example, “male” scallops corresponding to the female scallop cutouts).
  • the inlet ring includes
  • the taper locking windows utilizes the keel cutout windows and incorporates the taper and taper tab there but requires an additional assembly tool.
  • a proposed tool is also described herein, the tool allowing the cones to be held axially as they are lowered and impacted together, locking the taper.
  • Internal features of the cones can be that of a protruding structures, for example, a stepped series of rings, following or aligned with the outside sloped surface. These rings provide a mantle for the bone cement.
  • the cones can also include ribs, for example, one, two, three or four ribs, or more than for ribs. These ribs can provide the cement a mechanical face but to prevent rotation around the center axis of the cone.
  • the internal diameter is wide enough to accommodate a stem and an offset coupler in case offset stems are pursued and released.
  • the symmetric cone trials may be made of metal, medical grade plastic such as Radel, or any other appropriate material.
  • the trials will lock into place using a different method than taper locking which would make them difficult to separate and reuse.
  • the proposed locking methods are locking tabs, screws, detent and ball plunger with slot or dovetail, or a leaf spring. These designs will be tested before settling on a locking method for the trials.
  • the outer porous coated surfaces of the cone may be generated with a three- dimensional (3D) printing, for example, using an additive fabrication technique. This may be the same technique to generate a porous lattice surface on the cones. They also may be manufactured used P 2 and traditional subtractive manufacturing. This surface will encourage bone growth and improve fixation between the cone and the bone.
  • an appropriate diameter stem reamer is first driven to the desired depth by the surgeon and then left in place. Over the reamer, an over-ream cone reamer is placed, and the cone reamer is used to prepare the void which will be filled by the cone and cone trials. The cone trials are then assembled and fixed together for trialing to the desired construct height and diameter. The trials are placed in the void and assessed. They are then removed from the void and any adjustments to the preparation are made. The final implants are then assembled to match the trials and impacted and implanted along with the remaining knee implants. The femur over reamer may have to be a smaller size than the tibia depending on the sizing analysis results and depending on how close to the femoral implant the surgeons desire the cone to be.
  • FIG. 1A is an example of a representation of certain parts of a knee joint 1 of a human shown here for context and orientation, illustrating a femur 2, tibia 4, fibula 8, patella 6 (kneecap), the lateral condyle 10, the head of the fibula 12, and the interosseous membrane 14.
  • Knee implants can include components that are fitted into the femur 2 or the tibia 4.
  • Some implants can include, for a tibia implant, an augment cone and an elongated component that extends from the cone downward into the tibia 4, and for a femur implant, an augment cone and an elongated component that extends from the cone upward into the femur 2.
  • Figure IB is an example of a representation of certain parts of a stackable augment cone system implanted in a tibia 4.
  • the cone system includes three cones, for example, a primary cone 102, a second cone 132, and a third cone 152.
  • the primary cone 102 is positioned in the assembled cone system proximal 32 to the knee joint
  • the third cone 152 is positioned in the assembled cone system distal 30 to the knee joint.
  • the stackable cone system can be coupled to a tibial component 20 (e.g., a tibial base plate) on its proximal end 32, and an elongated implant component 119 that extends into the tibia (e.g., a tibial stem) on the cone system’s distal end 30.
  • a tibial component 20 e.g., a tibial base plate
  • an elongated implant component 119 that extends into the tibia (e.g., a tibial stem) on the cone system’s distal end 30.
  • Figure 2 illustrates a perspective view of an example of a first embodiment of a stackable augment cone system 100 (sometimes referred to herein as a “cone system” for ease of reference) having three cones aligned and coupled together in a stack.
  • the cone system 100 includes the primary cone 102, a second cone 132, the third cone 152.
  • the second cone 132 is positioned between the primary cone 102 and the third cone 152.
  • the primary cone 102 includes a cone wall 109 that at least partially surrounds a volume inside of primary cone 102.
  • the primary cone 102 includes a first cutout (or “window”) 103 positioned in the cone wall 109 of the primary cone 102.
  • the primary cone 102 may include a second cutout (“window”) 104 also positioned in the cone wall 109.
  • the first cutout 103 and the second cutout 104 are positioned on opposite sides of the primary cone 102 such that they are directly opposite each other in the cone wall 109.
  • the first cutout 103 in the second cutout 104 may be positioned at locations in the cone wall 109 that are not directly opposite each other.
  • the first cutout 103 in the second cutout 104 extend for a distance from the proximal end 106 of the primary cone 102 towards the distal end 107 of the primary cone 102, such that each cutout 103, 104 generally forms a U-shaped opening in the cone wall 109.
  • a primary cone (or “cone body”) can be described as having an “upper” or “proximal” end (that when implanted is positioned proximal to the patient’s heart) and as having a “lower” or “distal” end (which is positioned distal from the patient’s heart when implanted).
  • the cone body includes at least one cutout (or gap) in the wall of the cone. The portion of the wall around each cutout includes an attachment feature that is configured to receive and attach to an augment, which is further described in reference to Figure 61 and 6 J.
  • the two cutouts 103, 104 can be configured in the primary cone wall 109 directly opposite each other (e.g., on opposite sides of the primary cone) as illustrated, for example, in Figure 2. In such examples, centers of the two cutouts 103, 104 are aligned 180 degrees apart. In some embodiments, the two cutouts 103, 104 can be configured in the primary cone wall 109 opposite each other but they may not be directly opposite each other.
  • first cutout and the second cutout can be positioned in the cone wall such that a portion of the cone wall between a first edge of the first cutout and an adjacent first edge of the second cutout is larger than a portion of the cone wall between the second edge of the first cutout and an adjacent second edge of the second cutout.
  • the centers of the two cutouts are not 180 degrees separated. That is, the cutout center separation angle is not 180°.
  • a cutout center separation angle is 1°, 2°, 3°, 4°, 5°, 6°, 7°, 8 °, 9°, 10°, 11°, 12°, 13°, 14°, 15°, 16°, 17°, 18°, 19°, 20°, 21°, 22°, 23°, 24°,
  • Primary cone 102 includes a tab 108 that extends from the distal end 107 of the primary cone 102.
  • tab 108 is aligned with the first cutout 103.
  • the tab 108 is centered on the cutout 103.
  • the primary cone 102 can include the second tab (not shown) that also extends from the distal end 107 of the primary cone 102, and that can be aligned with the second cutout 104.
  • the tab 108 can be, for example, is generally rectangular shaped structure that is curved to conform to the cone wall 109 such that the surface from the cone wall 109 to the tab 108 is continuous.
  • the primary cone 102 also includes one or more extraction slots 105 are positioned along the distal end 107 of primary cone 102.
  • the extraction slot 105 forms an opening in the cone wall 109 between the primary cone 102 and the second cone 132, providing the location where a tool can be inserted to separate the cones, if necessary.
  • the primary cone 102 also includes an exterior surface 110 which may include bone growth material 116.
  • the bone growth material may be the material P 2 , a proprietary titanium porous coating, where the non-spherical bead that forms the coating itself is also porous.
  • the material consists of variability poor sizes, for example, similar to a “lava rock” structure and on a much smaller scale.
  • inter-bead poor size the pore size between each non-spherical bead, can be between 200 and 525 pm.
  • intra-bead pore size (the poor size within each non-spherical bead) can be between 25 and 65 pm.
  • the average perversity is 60%.
  • an exterior surface of a cone includes P 2 , a titanium porous coating by DJO Surgical.
  • P 2 a titanium porous coating by DJO Surgical.
  • An advantage of P 2 is that the non-spherical bead of the coating itself is also porous, thus giving it its name, P-Squared (P 2 ). Consisting of variability in pore sizes, very similar to a “lava rock” type of structure, P 2 aids in the apposition of bone for superior in-growth results.
  • the surface structure can be another type of porous of rough coating.
  • the surface structure is 3D printed to generate a porous lattice surface.
  • the porous coating is a consistent depth on the outside surface (e.g., an outside surface of the main body cone and/or an outside surface of a segment cone).
  • the outside surface e.g., an outside surface of the main body cone and/or an outside surface of a segment cone.
  • the main body cone does not include either one or more of the upper or lower rings, and the coating can be an all-around coating.
  • the surface structure is generated using traditional subtractive manufacturing (e.g., removing material from an exterior surface, or surface coating, of a cone or an augment.
  • Primary cone 102 can also include one or more ribs structures 113 on an interior surface of the primary cone 102, which provide attachment surfaces of the interior surface of primary cone.
  • the primary cone 102 may also include an interior wall protrusion structures 117 extending from a portion of the cone wall inward towards the center of the primary cone 102. As illustrated in Figure 1, this embodiment of a primary cone includes four protrusion structures 117.
  • the primary cone 102 can also include one or more locking structures 111 on the proximal end 106, and one or more recessed portions 112 on the proximal end 106.
  • the locking structures 111 and the recessed portion 112 can be joined with another device (not shown) that is positioned on the proximal end of the primary cone 102 and help to lock in place the other device with respect to the primary cone 102.
  • the internal surface of the cone can include one or more axially-aligned ribs for rotational fixation for cement.
  • the axially-aligned ribs allow the cement to have purchase against a surface which is not curved around the center axis which provides resistance against a rotational force around the axis of the main body cone.
  • preparation for using the implant can include an over ream on the stem reamer for the main body, and then an offset jig with an augment reamer for the augment cone.
  • the second cone 132 can include similar features primary cone, as illustrated and discussed herein.
  • the second cone 132 includes a cutout 133 that is configured to receive a tab 108 of the primary cone 102, which helps to lock the primary cone into position and into a particular alignment with the second cone 132.
  • the second cone can also include exterior surface 140, and the least a portion of the exterior surface 140 can include bone growth material 146.
  • the second cone 132 also includes a cone wall 139, one or more extraction slots 135, locking structures 141, and the recessed portion 145.
  • Recessed portion 145 and the locking structures 141 are configured to mate with a recessed portion 115 and the step structure 118 of the distal end 107 of the primary cone 102, and helps to prevent the primary cone 102 from rotating relative to the second cone 132.
  • the cutout 133 in the cone wall 139 the second cone 132 can extend from the proximal end 136 the second cone 132 towards the distal end 139 of the second cone 132 distance such that when the tab 108 the primary cone 102 inserted in the cutout 133, there is a small gap between the end of the tab 108 and the cone wall 139 of the edge of the cutout 133, which may also provide the gap to be accessed by tool to separate the cones if needed.
  • the second cone can also include a tab 138 that extends from the distal end 137 of the second cone 132 and is configured to mate with the cutout 153 of the third cone 152.
  • the third cone 152 can include similar features to the primary cone 102 second cone 132 as illustrated and described herein.
  • the third cone 152 can include the cutout 153 which extends from the proximal end 156 of the third cone 152 towards the distal end 157 third cone 152.
  • the cutout 153 can extend the distance such that when the tab 138 of the second cone 132 is inserted into cutout 153, there is a small gap between the end of the tab 138 and the cone wall 159 the third cone 152.
  • the third cone also may include one or more extraction slots 155 locking structures 161 and recessed portions that mate with the structure on the distal end receptive second cone 132 to lock the second cone 132 in the third cone 152 to a certain alignment and the second cone in the third cone rotating relative to each other.
  • Certain aspects and structures of this embodiment of a cone system including the primary cone 102, the second cone 132, and the third cone 152 are illustrated in Figures 3 - 7B.
  • the third cone 152 has an exterior surface 150 on a wall of the third cone 152, and the exterior surface 150 may include bone growth material 116 thereon.
  • Figure 3 illustrates a side elevation view of the example of the stackable augment cone system of Figure 2, the side elevation view being illustrating one side of the cones where the tabs and the corresponding cutouts (“windows”) in the sides of the walls of the second and third cones are configured to receive a tab of a proximally positioned cone are aligned on the left-side and right-side (relative to the orientation of Figure 3) of this side elevation view.
  • Figure 3 illustrates an example of corresponding locking structures that can be used to lock or mate the cones together. For example, a recessed portion 115 of the distal end 107 of the primary cone 102 can mate to a lock structure 141 on the proximal end 136 of the second cone 132.
  • a step structure 148 on the distal end 137 of the second cone 132 can mate with a lock structure 161 on the proximal end 156 of the third cone 152.
  • Figure 3 also illustrates examples of tabs of one cone mating and fitting into a corresponding cutout of an adjacent cone.
  • Figure 3 also illustrates an example of a position and shape of the extraction slots 105, 135, and 155.
  • Figure 4 illustrates a side elevation view of the example the stackable augment cone system of Figure 2 and Figure 3 (rotated 90 degrees from the side elevation view of Figure 3), showing three stacked cones 102, 132, 152 aligned such that a tab on a lower portion of the top (primary cone) 102 is aligned with a window on the middle cone, and a tab on the lower portion of the middle (second) cone 132 is aligned with a window on the bottom (third) cone 152.
  • the vertical orientation shown and described relates to a tibial implant where the proximal end 32 is positioned closest to the knee joint, and the distal end 30 is positioned farthest from the knee joint.
  • Figure 4 also illustrates a cross-sectional line AA-AA that bisects the cone system illustrated in Figure 4, and specifically that bisects the windows and tabs of the primary (or top) cone, the second (or middle) cone, and the third (or bottom) cone of the cone system.
  • the longitudinal line AA-AA running vertically in Figure 4 also represents a longitudinal axis of the stackable augment cone system, each of the primary cone, the second cone, and the third cone having a longitudinal axis that aligned with the longitudinal cross-sectional line AA-AA.
  • Figure 5 illustrates a cross-sectional perspective view of the example of the stackable augment cone system of Figure 4 cut through a plane positioned at cross-sectional line AA-AA shown in Figure 4.
  • This example illustrates the interior surface 114 of the primary cone 102, the interior surface 144 of the second cone, and the interior surface 154 of the third cone 152.
  • the interior surfaces 114, 144, 154 of each of the cones 102, 132, 152 can include one or more ribs.
  • Figure 5 also illustrates interior wall protrusion structures 117 of the primary cone 102.
  • the protrusion structures 117 can be used to interface with an implant component positioned in the primary cone, and they provide longitudinal structural support.
  • Figure 6A is a top perspective view that illustrates an example of a top or primary cone 102, for example, the primary cone 102 illustrated in Figure 2.
  • the cutouts 103, 104 each include two sides 122, 123 each extending from the proximal edge of the primary cone 102 towards the distal end of the primary cone 102.
  • Each cutout 103, 104 also includes a curved bottom edge 124 connecting the distal end of the sides 122, 123.
  • the cutouts may be shaped differently to mate with corresponding implant components.
  • Figures 6B - 6 H illustrate other views of an example of a primary cone 102.
  • Figure 6B is another top perspective view that illustrates an example of the primary cone shown in Figure 6A, showing the primary cone 102 including a cutout and a coupling tab 108 that is aligned with the cutout (e.g., centered on the window in this example) and positioned below the cutout, the tab 108 positioned on a distal end 107 of the primary cone 102.
  • Figure 6C is a side elevation view that illustrates an example of the primary cone 102 shown in Figure 6A, showing a side elevation view of the primary cone 102, the cutout 103, and a coupling tab 108 that is aligned with the cutout 103 (e.g., centered on the cutout in this example) and positioned below the cutout 103 on a distal end of the primary cone 102.
  • Figure 6D is a side elevation view that illustrates the example of the primary cone 102 shown in Figure 6 A, where the view of the primary cone 102 is rotated 90 degrees relative to the view of the primary cone in FIG.
  • FIG. 6C such that the primary cone is positioned to show sides of the primary cone 102 that do not include the cutouts and the tabs 108 are on the lateral sides of the primary cone 102.
  • Figure 6E is a top perspective view that illustrates structural features of the example of the primary cone 102 shown in Figure 6A.
  • Figure 6F is bottom perspective view that illustrates structural features of the example of the primary cone 102 shown in Figure 6A.
  • Figure 6G is a bottom perspective view of the primary cone 102 that illustrates additional structural features of the example of the primary cone 102 shown in Figure 6A.
  • the primary cone 102 includes an edge perimeter 128 on its distal end, which surrounds an aperture 126 of the primary cone 102.
  • Figure 6H is bottom elevation view that illustrates structural features of the distal end 107 pf the example of the primary cone shown 102 of Figure 6A.
  • Figure 6H illustrates, for example, for example, extraction slots 105 on the distal end of the primary cone 102.
  • Figure 6H also illustrates recessed portions 115 and structures 118 on the distal end of the primary cone, these structures used to mate the primary cone with the second cone.
  • Figure 61 illustrates an example of an embodiment of a portion of a primary cone 102 where a cutout is configured to receive an augment cone (or “augment”).
  • cutout 103 is configured to receive an augment 200 such that the augment 200 couples to one or more sides 122, 123, 124 of the cutout 103.
  • Figure 6 J illustrates a top perspective view of the example of the augment 200 illustrated in Figure 61.
  • “Augment” as used herein, is a broad term that generally refers to a component of a modular augment cone system.
  • an augment 200 can include an upper surface 220 on a proximal end 203 of the augment 200, a groove 215 on two edges of the augment 200, a cavity 240, an edge portion 210 on the proximal end 204, attachment features 216, 217, an exterior wall 205, and can include a bone growth surface 235.
  • the augment 200 can be positioned into a cutout 103 of the primary cone 102 by engaging the grooves 215 of the augment 200 with corresponding locking structure 111 on the sides of the cutout 103.
  • a portion 220 of the augment 200 is positioned adjacent to the exterior surface 110 of the primary cone 102 near the cutout.
  • the augment 200 can be held in position (at least with respective to two directions) by the interaction between the grooves 215 of the augment 200 and the sides of the cutout 103.
  • the attachment feature is a dovetail that fits into the corresponding groove 215 of the augment 200.
  • the attachment feature 217 and the corresponding groove 215 are correspondingly shaped to have a close but movable fit to allow the augment 200 to be slid into place. That is, the augment 200 is slid into the cutout 103 from the proximal end 106 of the primary cone 102 and is moved toward the distal end 107 until it is seated in the cutout 103.
  • the modular knee augment cone system will be an asymmetric cone.
  • the side edges and lower (“distal”) edges of the augment are structured to align with corresponding structure on the edges of the cutout, and the side and distal edges of the augment are positioned in close proximity to, and/or in contact with, said corresponding structure of the edges of the cutout on the main body cone.
  • the augment cone 200 can be locked into place once it is fully seated in the cutout.
  • the augment 200 is shown being partially positioned in one of the two cutouts of a primary cone 103.
  • the cone system will be an asymmetric cone.
  • the side edges and lower (“distal”) edges of the augment 200 are structured to align with corresponding structure on the edges of the cutout 103, and the side and distal edges of the augment 200 are positioned in close proximity to, and/or in contact with, said corresponding structure of the edges of the cutout 103 on the primary cone.
  • the augment 200 is attached to the primary cone and may be locked into place before the primary cone and augment 200 are implanted in a patient.
  • the primary cone includes a cavity which is partially surrounded by primary cone structure.
  • the cavity of the augment When the augment is attached to the primary cone, the cavity of the augment is contiguous with the cavity (or volume) of the primary cone, forming a larger cavity than the cavity of the primary cone. Additional description of an augment can be found in U.S. Patent No. 11,660,199, which is incorporated by reference herein in its entirety.
  • Figure 7A is a side elevation view that illustrates an example of a second cone 132, for example, the second cone illustrated as the second (middle) cone in Figure 2.
  • the second cone 132 includes at least one cutout 133 and at least one tab 138, locking structure 141 and recessed portions 145 that are used to mate (or couple) the proximal end of the second cone 132 to the distal end of the primary cone 102.
  • the second cone also includes recessed portions 142 that are used to mate (or couple) the distal end of the second cone 132 with the proximal end of the third cone 152.
  • Figure 7B is a side elevation view that illustrates an example of a third cone 152, for example, the third cone illustrated as the bottom cone (i. e. , the most distally positioned cone) in Figure 2.
  • the third cone 152 includes at least one cutout 153k, locking structure 141 and recessed portions 145 that are used to mate (or couple) the proximal end of the third cone 152 to the distal end of the second cone 132.
  • the third cone 152 also includes portions 142, which is this example on the third cone are planar, but can be recessed or extended in configurations where they are to mate with a fourth cone of the cone system.
  • Figure 9 A illustrates a perspective view of example of a second embodiment of a stackable augment cone system having two cones aligned in a stack (e.g., a top/primary/proximal cone and a bottom/second/distal cone), the cones having an “inlet ring” interface between the cones to mate the cones together.
  • Figure 9A also illustrates lines BB-BB that define a plane the bisects this cone system.
  • the primary cone includes a female-configured (“female”) inlet ring and the second cone includes a male-configured (“male”) inlet ring configured to mate with the inlet ring of the primary cone, the structures of the inlet cones locking the cones into an alignment that inhibits or prevents relative rotation of the cones.
  • the primary cone 102 includes a female-configured (“female”) inlet ring 120 and the second cone 132 includes a male- configured (“male”) inlet ring 149 configured to mate with the inlet ring 120 of the primary cone, the structures of the inlet cones locking the primary cone 102 and the second cone 132 into an alignment that inhibits or prevents relative rotation of the cones.
  • the primary cone 102 includes a first window 103 in the second window 104 positioned on opposite sides of the cone wall.
  • the primary cone 102 and the second cone 132 can include rib structures 113 on the interior surfaces of the primary cone in the second cone.
  • the primary cone 102 can also include protrusions 117 extending from the cone wall inward towards a center portion of the primary cone 102.
  • the inlet ring 120 primary cone 102 is a female configured inlet ring which is configured to surround at least a portion of the male configured inlet ring 149 of the second cone 132.
  • the primary cone 102 may include a male configured inlet ring
  • the second cone 132 may include a female configured inlet ring which is configured to mate with the mail inlet ring primary cone 102.
  • the system includes a third cone with a corresponding inlet ring on its proximal end to mate with the inlet ring on the distal end of the second cone.
  • Figure 9B illustrates a cross-sectional perspective view of the example of the second embodiment of the cone system shown in the example of Figure 9A along the plane defined by the lines BB-BB.
  • inlet ring and coupling structures 147 can be seen on the distal end of the second cone 132.
  • Figure 9C illustrates a bottom perspective view of the cone system shown in example of Figure 9A.
  • the second cone 132 includes a proximal male inlet ring and a distal female inlet ring, the distal female inlet ring illustrated in Figure 9C.
  • Figure 9D illustrates a side perspective view of the cone system shown in example of Figure 9 A.
  • Figure 9E illustrates a top elevation view of the primary cone and second cone of the cone system, shown in the example of Figure 9A, coupled together. This view illustrates the aperture 175 on the distal end of the second cone 132, a distal edge 172 of the second cone 132 surrounding the aperture 175, and a top proximal edge 171 of the second cone, as well as additional features.
  • Figure 10A illustrates a bottom elevation view illustrating an example of a female inlet ring that can be included on an embodiment of primary conel02 (i.e., the proximal/top cone) shown in the example of Figure 9A.
  • the inlet ring includes 10 scallop-shaped cutouts 134 to accommodate corresponding one or more male scallops on a male configured inlet ring on the top of a second cone 132.
  • the number of male scallops on a male inlet ring may be less than the number of scallop-shaped cutouts on the female ring.
  • the female inlet ring may include 1, 2, 3, 4, 5, 6, 7, 8, or 9 more scallop-shaped cutouts then on a male inlet ring.
  • the male inlet ring may have 1, 2, 3, 4, 5, 5, 7, 8, or 9 scallops and the female inlet ring may include 10 scallop-shaped cutouts.
  • the male scallops are arranged around the inlet ring. For example, arranged symmetrically around the inlet ring. In some examples, the male scallops are arranged on opposite sides of the inlet ring.
  • Figure 1 OB illustrates a top perspective view of the primary cone 102 of the cone system shown in the example of Figure 10A, and also illustrates lines CC-CC that defines a plane that bisects the primary cone 102.
  • Figure 10C illustrates a cross-sectional top perspective view of the primary cone 102 shown in the example of Figure 9 A along the plane defined by the lines CC-CC shown in Figure 10B.
  • Figure 10D illustrates a bottom perspective view of the primary cone 102 of the cone system shown in the example of Figure 10A, illustrating certain structural features of this embodiment.
  • Figure 10E illustrates a bottom perspective view of the primary cone 102 of the cone system shown in the example of Figure 10A, further illustrating certain structural features of this embodiment.
  • Figure 10F illustrates a top elevation view of the primary cone 102 of the cone system shown in the example of Figure 10A.
  • Figure 11A illustrates a top perspective view of the second cone 132 of a cone system similar to the example of Figure 10A, where in this example, the proximal end of the second conel32 includes a male inlet ring 149 and the distal end 137 of the second cone includes a female inlet ring.
  • Figure 11 A also illustrates lines DD-DD that define a plane that bisects the second cone.
  • One or more locking structures 167 can be included on the male inlet ring to couple to corresponding locking structures (e.g., structures 134) on the primary cone 102.
  • Figures 1 IB - 11G illustrate various other views of the embodiment of Figure 11A.
  • Figure 11B illustrates a cross-sectional perspective view of the second conel32 shown in the example of Figure 11A along the plane defined by the lines DD-DD shown in Figure 11A.
  • Figure 11C illustrates a top perspective view of the second cone 132 shown in the example of Figure 11 A.
  • Figure 11D illustrates a top and side perspective view of the second cone 132 shown in the example of Figure 11 A.
  • Figure HE illustrates a bottom and side perspective view of the second cone shown in the example of Figure 11 A.
  • Figure 1 IF illustrates a top elevation view of the second cone shown in the example of Figure 11 A.
  • Figure 11G illustrates a bottom elevation view of the second cone shown in the example of Figure 11A illustrating the distal end of the cone.
  • the distal end of the second cone 132 is configured to include a female inlet ring.
  • the primary cone 102 can include similar features as other primary cones disclosed herein, for example, cutouts 103 and 104, an exterior surface 110, bone growth material 116 on at least a portion of the exterior surface 110, one or more extraction slots 105, one or more rib structures 113, and a top proximal surface 170 on a proximal end 31 that can be coupled to a tibial component (e.g., tibial component 20, figure 1).
  • the second cone 132 can include similar features as other second cones disclosed herein, for example, an exterior surface 150 and bone growth material 146 on at least a portion of the exterior surface 150.
  • the primary cone 102 and the second cone 132 can be coupled together using various configurations of structure on the distal end of the primary cone 102 and the proximal end of the second cone 132.
  • the primary cone 102 includes a “male” configured inlet ring 190 that includes at least one extended member locking structure 191 that fits into an aperture or recessed portion 193 of the “female” configured inlet ring 192 of the second cone 132.
  • Example Embodiments The following are embodiments are a non-limiting list of innovative embodiments that include certain features disclosed herein.
  • a stackable augment cone assembly comprising: a primary cone including a cone body having a proximal end, a distal end, and a cone wall at least partially surrounding a first volume and extending between the proximal end and the distal end, the primary cone further including a first window in the cone wall having a length 11 and a width wl , the first window extends between the length 11 from the proximal end of the cone body towards the distal end of the cone body, a first tab on the distal end of the cone body extending away from a portion of the cone wall on the distal end of the cone body, the first tab having a length 12 and a width w2, and one or more extraction slots formed along the edge of the distal end of the cone body; and a second cone including a cone body having a proximal end, a distal end, and a cone wall at least partially surrounding a second volume and extending between the proximal end and the distal end, the second cone
  • Embodiment 2 The stackable augment cone assembly of embodiment 1, wherein the primary cone further comprises rib structures along an inner surface of the primary cone.
  • Embodiment 3 The stackable cone augment assembly of embodiment 2, wherein the rib structures are aligned in a plane parallel to a cross-section of the primary cone.
  • Embodiment 6 The stackable cone augment assembly of embodiment 5, wherein the rib structures are aligned in a plane parallel to a cross-section of the second cone.
  • Embodiment 7 The stackable augment cone assembly of embodiment 5, wherein the rib structures include three or more rib structures.
  • Embodiment 8 The stackable augment cone assembly of any one of embodiments 1 to 7, wherein the primary cone further comprises a second window in the cone wall having a length 14 and a width w4, the second window extending the length 14 from the proximal end of the cone body of the primary cone towards the distal end of the cone body of the primary cone.
  • Embodiment 9 The stackable augment cone assembly of embodiment 8, wherein the second window is positioned in the cone wall opposite the first window.
  • Embodiment 10 The stackable augment cone assembly of embodiment 8, wherein the second window is positioned in the cone wall directly opposite the first window.
  • Embodiment 11 The stackable augment cone assembly of any one of embodiments 1 to 10, wherein the primary cone further comprises a second tab on the distal end of the cone body extending away from a portion of the cone wall on the distal end of the cone body, the second tab having a length 15 and a width w5, and wherein the second cone further comprises a second window in the cone wall shaped to receive the second tab of the primary cone therein, the second window having a length 16 and a width w6, the first window extending the length 16 from the proximal end of the second cone towards the distal end of the second cone, the second window of the second cone positioned to receive the second tab of the primary cone when the first window of the second cone is aligned to receive the first tab of the primary cone.
  • Embodiment 12 The stackable augment cone assembly of embodiment 11, wherein the width w6 of the second window in the second cone is greater than the width w5 of the second tab of the primary cone, and wherein the length 16 of the second window of the second cone is greater than the length 15 of the second tab of the primary cone.
  • Embodiment 13 The stackable augment cone assembly of embodiment 1, wherein the second cone further comprises a first tab on the distal end of the cone body extending away from a portion of the cone wall on the distal end of the cone body, the first tab having a length 17 and a width w7.
  • Embodiment 14 The stackable augment cone assembly of embodiment 13, further comprising a third cone comprising a cone body having a proximal end, a distal end, and a cone wall extending between the proximal end and the distal end, the third cone further including a first window in the cone wall of the third cone shaped to receive the first tab of the second cone therein, the first window having a length 18 and a width w8, the first window extending the length 18 from the proximal end of the cone body of the third cone towards the distal end of the cone body of the third cone, the length 18 of the first window in the third cone being greater than the length 14 of the first tab of the second cone, and the width w8 of the first window in the third cone being greater than the width w4 of the first tab of the second cone.
  • Embodiment 15 The stackable augment cone assembly of embodiment 14, wherein the third cone further comprises rib structures along an inner surface of the cone body.
  • Embodiment 16 The stackable augment cone assembly of embodiment 15, wherein the rib structures are aligned in a plane parallel to a cross-section of the third cone.
  • Embodiment 17 The stackable augment cone assembly of embodiment 15, wherein the rib structures include three or more rib structures.
  • Embodiment 18 The stackable augment cone assembly of embodiment 14, further comprising one or more extraction slots along an edge of the distal end of the cone body of the third cone.
  • Embodiment 19 The stackable augment cone assembly of embodiment 14, wherein the second cone further comprises a second tab on the distal end of the cone body extending away from a portion of the cone wall on the distal end of the cone body, the tab having a length 19 and a width w9, and wherein the third cone further comprises a second window in the cone wall shaped to receive the second tab of the second cone therein, the second window having a length 110 and a width wlO, the second window extending the length 110 from the proximal end of the cone body of the third cone towards the distal end of the cone body of the third cone, the length 110 of the second window in the third cone being greater than the length 19 of the second tab of the second cone, and the width wlO of the first window in the third cone being greater than the width w9 of the first tab of the second cone.
  • Embodiment 20 The stackable augment cone assembly of embodiment 1, wherein the primary cone further comprises a first set of two step structures protruding from the proximal end of the cone body and a recessed portion between the two step structures.
  • Embodiment 21 The stackable augment cone assembly of embodiment 1, wherein the primary cone further comprises a first set of two recessed portions on the distal end of the cone wall and a step structure protruding from the distal end of the cone body between the first set of two recessed portions.
  • Embodiment 23 The stackable augment cone assembly of embodiment 1, wherein the second cone further comprises a first set of two step structures protruding from the proximal end of the cone body and a recessed portion between the two step structures.
  • Embodiment 24 The stackable augment cone assembly of embodiment 23, wherein the first set of two recessed portions on the distal end of the primary cone are shaped to receive the first set of two step structures of the second cone therein to prevent the primary cone and secondary cone from rotating relative to one another when the two step structures of the second cone are positioned in the first set of two recessed portions of the primary cone.
  • Embodiment 44 The stackable augment cone assembly of any one of embodiments 30-43, wherein the second volume is less than the first volume.

Landscapes

  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Prostheses (AREA)

Abstract

Système de cônes d'augmentation empilables présentant un cône principal comprenant une première fenêtre, une première languette sur l'extrémité distale du corps de cône, et au moins une fente d'extraction formée le long du bord d'une extrémité distale du corps de cône. Le système peut également comprendre un deuxième cône comprenant une première fenêtre dans une paroi de cône dimensionnée et façonnée en correspondance avec la première languette pour recevoir celle-ci en son sein, et au moins une fente d'extraction formée le long du bord du deuxième cône, et un troisième cône, le deuxième cône pouvant être positionné entre les premier et troisième cônes. Un autre système comprend un cône principal comprenant une première fenêtre dans une paroi de cône, et un premier anneau d'entrée comprenant des structures de verrouillage, et un second cône comprenant une seconde entrée conçue pour s'accoupler avec les structures de verrouillage du premier anneau d'entrée empêchant le cône principal de tourner par rapport au second cône.
PCT/US2025/010571 2024-01-09 2025-01-07 Cônes d'augmentation de genou empilables Pending WO2025151420A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US202463619026P 2024-01-09 2024-01-09
US63/619,026 2024-01-09

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WO2025151420A1 true WO2025151420A1 (fr) 2025-07-17

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060015184A1 (en) * 2004-01-30 2006-01-19 John Winterbottom Stacking implants for spinal fusion
US20160296336A1 (en) * 2015-04-07 2016-10-13 Gerhard E. Maale Torsionally Stabilized Endoprosthetic Device
US20200276024A1 (en) * 2019-02-28 2020-09-03 Oxford Performance Materials, Inc. Articulating Knee Spacer and Method of Manufacture

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060015184A1 (en) * 2004-01-30 2006-01-19 John Winterbottom Stacking implants for spinal fusion
US20160296336A1 (en) * 2015-04-07 2016-10-13 Gerhard E. Maale Torsionally Stabilized Endoprosthetic Device
US20200276024A1 (en) * 2019-02-28 2020-09-03 Oxford Performance Materials, Inc. Articulating Knee Spacer and Method of Manufacture

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