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WO2007031063A2 - Calotte de tete femorale presentant une surface d'ancrage combinee cimentee et non-cimentee destinee a des protheses de remplacement de surface de l'articulation de la hanche - Google Patents

Calotte de tete femorale presentant une surface d'ancrage combinee cimentee et non-cimentee destinee a des protheses de remplacement de surface de l'articulation de la hanche Download PDF

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Publication number
WO2007031063A2
WO2007031063A2 PCT/DE2006/001603 DE2006001603W WO2007031063A2 WO 2007031063 A2 WO2007031063 A2 WO 2007031063A2 DE 2006001603 W DE2006001603 W DE 2006001603W WO 2007031063 A2 WO2007031063 A2 WO 2007031063A2
Authority
WO
WIPO (PCT)
Prior art keywords
femoral head
head cap
cement
region
anchoring
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.)
Ceased
Application number
PCT/DE2006/001603
Other languages
German (de)
English (en)
Other versions
WO2007031063A3 (fr
Inventor
Joachim Schmidt
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.)
Biomet Deutschland GmbH
Original Assignee
Biomet Deutschland GmbH
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 Biomet Deutschland GmbH filed Critical Biomet Deutschland GmbH
Priority to EP06791373A priority Critical patent/EP1924225A2/fr
Publication of WO2007031063A2 publication Critical patent/WO2007031063A2/fr
Publication of WO2007031063A3 publication Critical patent/WO2007031063A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3601—Femoral heads ; Femoral endoprostheses for replacing only the epiphyseal or metaphyseal parts of the femur, e.g. endoprosthetic femoral heads or necks directly fixed to the natural femur by internal fixation devices
    • A61F2/3603—Femoral heads ; Femoral endoprostheses for replacing only the epiphyseal or metaphyseal parts of the femur, e.g. endoprosthetic femoral heads or necks directly fixed to the natural femur by internal fixation devices implanted without ablation of the whole natural femoral head
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements
    • A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
    • A61B17/8802—Equipment for handling bone cement or other fluid fillers
    • A61B17/8805—Equipment for handling bone cement or other fluid fillers for introducing fluid filler into bone or extracting it
    • A61B17/8808—Equipment for handling bone cement or other fluid fillers for introducing fluid filler into bone or extracting it with sealing collar for bone cavity
    • 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
    • A61F2/30723—Plugs or restrictors for sealing a cement-receiving space
    • 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
    • A61F2/30724—Spacers for centering an implant in a bone cavity, e.g. in a cement-receiving cavity
    • 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
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • 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
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • 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
    • A61F2002/30317—The prosthesis having different structural features at different locations within the same prosthesis
    • A61F2002/30322—The prosthesis having different structural features at different locations within the same prosthesis differing in surface structures
    • 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
    • A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30589—Sealing means
    • 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
    • A61F2002/30535—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
    • A61F2002/30606—Sets comprising both cemented and non-cemented endoprostheses
    • 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
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A61F2002/30841—Sharp anchoring protrusions for impaction into the bone, e.g. sharp pins, spikes
    • A61F2002/30845—Sharp anchoring protrusions for impaction into the bone, e.g. sharp pins, spikes with cutting edges
    • 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
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A61F2002/30878—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts
    • 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
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A61F2002/30878—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts
    • A61F2002/30879—Ribs
    • A61F2002/30881—Circumferential ribs, flanges or fins
    • 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
    • A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2250/0014—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis
    • A61F2250/0026—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis differing in surface structures
    • 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
    • A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00005—The prosthesis being constructed from a particular material
    • A61F2310/00353—Bone cement, e.g. polymethylmethacrylate or PMMA
    • 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
    • A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00389—The prosthesis being coated or covered with a particular material
    • A61F2310/00592—Coating or prosthesis-covering structure made of ceramics or of ceramic-like compounds
    • A61F2310/00796—Coating or prosthesis-covering structure made of a phosphorus-containing compound, e.g. hydroxy(l)apatite

Definitions

  • the invention relates to a femoral head cap for hip replacement surface prostheses according to the preamble of claim 1, a method of applying cement according to claim 15 and an applicator according to claim 17.
  • One way of cementless attachment of a prosthetic element is the use of anchoring elements such as screws, pins, or nails.
  • anchoring elements such as screws, pins, or nails.
  • the be anchored on the joint bone by means of a frusto-conical dome after prior resection of the articular surface.
  • the invention is therefore based on the problem to provide a femoral head cap, which allows both a good anchorage of the femoral head cap on a machined femoral head and guarantees sufficient blood flow to the femoral head.
  • the hip cap according to the invention for surface replacement prostheses of the hip joint on an inner anchoring surface for attachment to the femoral head.
  • the femoral head cap according to the invention is characterized in that the inner anchoring surface has a first region for cement-fixed anchoring of the femoral head cap on the apical portion of the femoral head and a second region for cementless anchoring of the femoral head cap on most cylindrical shaped portion of the femoral head.
  • the femoral head cap is thus anchored with a portion of the inner anchoring surface with bone cement on the femoral head, while another portion of the inner anchoring surface is anchored cementless on the machined femoral head.
  • the femoral head cap according to the invention is fixed in the poorly perfused apical area with cement and at the same time ingrowth in the well-perfused lateral, mostly cylindrical portion of the femoral head without cement (osteointegration).
  • the first region of the inner anchoring surface comprises the apical, ie the tip portion of the Hunkopfkappe located at the tip, while the second region comprises the lateral, cylindrically expiring portion of the femoral head cap.
  • the apical portion of the inner anchoring surface with bone cement and the lateral, mostly cylindrical portion of the inner anchoring surface anchored cementless on the processed femoral head preferably the apical portion of the inner anchoring surface with bone cement and the lateral, mostly cylindrical portion of the inner anchoring surface anchored cementless on the processed femoral head.
  • the first region is bounded by at least one limiting means for cement, in particular a separating strip, coupled to the inner anchoring surface.
  • the at least one limiting means for cement is formed as a closed curve, in particular as a ring, in order to be able to form a seal against the cement compound.
  • first region is delimited by the second region by the separating strip coupled to the inner anchoring surface as limiting means.
  • the at least one limiting means is advantageously integrally formed at least partially integrally with the inner anchoring surface, the limiting means preferably being both part of a coating in the first, apical region and in the second, lateral region of the femoral head cap.
  • the at least one limiting means is, however, also advantageously fastened to the inner anchoring surface.
  • the at least one limiting means is at least partially formed as a separate from the femoral head cap part, which is placed directly on the femoral head before applying the femoral head cap.
  • the at least one limiting means advantageously has at least partially a round or pointed cross-section. This means that the cross section of the at least one limiting means can be variable over its circumference.
  • the separating strip is designed in the form of a prefabricated ring of polymethyl methacrylate (PMMA) or another material.
  • PMMA polymethyl methacrylate
  • the first region has a shape specially designed for cement anchoring, e.g. is spherical, conical or rounded and / or has surface enlargements. It is likewise advantageous if the first region has a surface structure or coating designed especially for cement anchoring.
  • the second region of the inner anchoring surface that is to say the lateral part, likewise advantageously has a shape specially designed for cementless anchoring, such as e.g. a cylindrical or conical shape, and / or anchoring grooves, anchoring bars or surface enlargements of different construction.
  • the second region of the inner anchoring surface that is to say the lateral part, advantageously has a surface structure designed especially for cementless anchoring.
  • the second region or lateral portion of the inner anchoring surface has a coating designed especially for the cementless anchoring, in particular hydroxylapatite.
  • a guide pin is advantageously arranged, which also acts as a centering aid during the operation.
  • the guide pin is preferably installed in the center of the apical portion of the inner anchoring surface and stands out from the inner anchoring surface.
  • low-viscosity or highly viscous cement e.g. PMMA
  • the quality of cement fixation in the apical part can be standardized by means of a special cement applicator and design of the anchoring surface.
  • the osteointegration in the lateral portion can be achieved by special surface design and optionally coating with z.
  • B. hydroxyapatite be optimized.
  • Cement fixation in the apical region ensures immediate stable anchoring of the femoral headcap. This primarily stable anchoring allows for secure bone (osteointegration) growth on the inner surface of the femoral head cap in the cementless anchoring area. If, after 10 to 15 years, there is a cement disruption due to cement aging, the bony, stable, cementless anchoring region provides secure stabilization of the femoral head cap.
  • the femoral head cap To adapt the femoral head cap to the femoral head, the femoral head is first machined using standard milling machines. In this case, the processing of the femoral head with special milling, which are tailored to the partial area of the cement fixation and the partial area of the cementless fixation.
  • the desired amount of cement for the cement fixation section is then applied to the machined femoral head using a specially designed applicator. Also, the desired amount of cement for the cement fixation subset is introduced into the anchorage surface, particularly the first region of the inner anchorage surface, of the femoral head cap with a specially adapted applicator.
  • Figure 1 is a schematic sectional view of a preferred embodiment of the femoral head cap according to the invention.
  • Figure 1A is a schematic sectional view of a modification of the embodiment of FIG. 1A;
  • FIG. 1B shows a schematic sectional view of a modification of the embodiment according to FIG. 1B
  • Figure 1 C is a schematic sectional view of a modification of the embodiment of Figure 1 with two separator strips.
  • FIG. 2 is a schematic representation of the use of an applicator according to the invention
  • Figure 1 shows the schematic structure of a preferred embodiment of the inventive H Commonkopfkappe 1 and a schematic frontal section through the hip joint.
  • the femoral head cap 1 according to the invention is applied to a processed femoral head 2.
  • Hsymmetrickopfkappe 1 has a cap edge 7 and an outer sliding surface 8, which with another prosthetic element, such. an anchored in the pelvic bone art pan, can interact.
  • the inner anchoring surface 6 is divided into the first, apically shaped region 3 and the second, cylindrically expiring region 4.
  • both areas 3, 4 are delimited from one another by the separating strip 5, whereby a spread of the cement from the first area 3 into the second area 4 is prevented.
  • the separating strip 5 is integrally formed on the inner anchoring surface 6. Variations of this detail are shown in Figs. 1A and 1B.
  • the separator bar 5 has a sharp, here triangular cross-section.
  • the cross section is the same here over the entire circumference of the separating strip.
  • the cross section may also be variable, ie the triangular contour may have different angles.
  • the separating strip 5 at least partially has a round cross section, for example the cross section of a circle segment.
  • FIG. 1A essentially corresponds to the embodiment according to FIG. 1, so that reference can be made to the corresponding description.
  • the parting strip 5 is not integrally formed on the inner anchoring surface 6, but is designed as a separate component which is inserted in the anchoring surface 6 or placed on the anchoring surface. It is also possible that the separator strip 5 partially inserted and partially hangs up.
  • the separator strip 5 has a round cross section here.
  • the separating strip 5 can also be designed as a separate part from the femoral head cap, which is applied to the femoral head 2. This is shown in FIG. 1B. Again, the separator bar 5 has a round cross-section.
  • FIG. 1C it is also possible for the embodiments of the separating strip 5 according to FIG. 1, FIG. 1A and FIG. 1B to be combined with one another, ie. the separator strip 5 is formed differently at different locations or that two embodiments are combined with each other.
  • a first separator strip 5A which is integrally formed on the inner anchoring surface 6, a second separator strip 5B, which is applied to the femoral head 2 with a larger circumference.
  • FIG. 1C Such a combination of separating strips 5A, 5B is shown in FIG. 1C.
  • At least one of the non-integrally molded separator strips 5 may e.g. be made of PMMA.
  • FIG. 2 shows the femoral head cap 1 when filling with bone cement.
  • An adapted to the size of the femoral head cap 1 applicator 11 is placed in the inner surface of the femoral head cap on the separator strip 5 and a precisely defined amount of cement with a cement syringe 12 in the first region 3 of the inner Anchoring surface H Commonkopfkappe 1 injected. It is important to ensure that the guide pin 9 is not wetted with cement.

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

L'invention concerne une calotte de tête fémorale (1) destinée à des prothèses de remplacement de surface de l'articulation de la hanche, présentant une surface d'ancrage intérieure (6) destinée à la fixation sur la tête fémorale (2). La calotte de tête fémorale selon l'invention est caractérisée en ce que la surface d'ancrage intérieure (6) présente une première zone (3) destinée à l'ancrage cimenté de la calotte de tête fémorale (1) sur la section apicale de la tête fémorale (2), et une deuxième zone (4) destinée à l'ancrage non-cimenté de la calotte de tête fémorale (1) sur la section essentiellement cylindrique de la tête fémorale. L'invention concerne également un procédé d'application de ciment dans une calotte de tête fémorale ainsi qu'un applicateur destiné à cet effet.
PCT/DE2006/001603 2005-09-12 2006-09-08 Calotte de tete femorale presentant une surface d'ancrage combinee cimentee et non-cimentee destinee a des protheses de remplacement de surface de l'articulation de la hanche Ceased WO2007031063A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06791373A EP1924225A2 (fr) 2005-09-12 2006-09-08 Calotte de tete femorale presentant une surface d'ancrage combinee cimentee et non-cimentee destinee a des protheses de remplacement de surface de l'articulation de la hanche

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005043244A DE102005043244A1 (de) 2005-09-12 2005-09-12 Hüftkopfkappe mit kombinierter zementierter und zementfreier Verankerungsfläche für Oberflächenersatzprothesen des Hüftgelenkes
DE102005043244.1 2005-09-12

Publications (2)

Publication Number Publication Date
WO2007031063A2 true WO2007031063A2 (fr) 2007-03-22
WO2007031063A3 WO2007031063A3 (fr) 2007-08-02

Family

ID=37603114

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2006/001603 Ceased WO2007031063A2 (fr) 2005-09-12 2006-09-08 Calotte de tete femorale presentant une surface d'ancrage combinee cimentee et non-cimentee destinee a des protheses de remplacement de surface de l'articulation de la hanche

Country Status (3)

Country Link
EP (1) EP1924225A2 (fr)
DE (1) DE102005043244A1 (fr)
WO (1) WO2007031063A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220047394A1 (en) * 2017-11-01 2022-02-17 Matortho Limited Improvements in or relating to ceramic femoral resurfacing head prosthesis
EP4529889A1 (fr) * 2023-09-29 2025-04-02 Howmedica Osteonics Corporation Tête de resurfaçage pour joint à rotule

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1227601A (fr) * 1983-05-06 1987-10-06 Frederick F. Buechel Prothese avec accouplement reduisant la tension
DE3516743A1 (de) * 1985-05-09 1986-11-13 orthoplant Endoprothetik GmbH, 2800 Bremen Endoprothese fuer einen hueftkopf
GB9017402D0 (en) * 1990-08-08 1990-09-19 Howmedica Total hip replacement femoral component
ES2226829T3 (es) * 1999-04-15 2005-04-01 Franz Sutter Protesis de cabeza de articulacion y conjunto de piezas para su construccion.
GB0007391D0 (en) * 2000-03-27 2000-05-17 Benoist Girard & Cie Prosthetic femoral component

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220047394A1 (en) * 2017-11-01 2022-02-17 Matortho Limited Improvements in or relating to ceramic femoral resurfacing head prosthesis
US12458500B2 (en) * 2017-11-01 2025-11-04 Matortho Limited Ceramic femoral resurfacing head prosthesis
EP4529889A1 (fr) * 2023-09-29 2025-04-02 Howmedica Osteonics Corporation Tête de resurfaçage pour joint à rotule

Also Published As

Publication number Publication date
EP1924225A2 (fr) 2008-05-28
WO2007031063A3 (fr) 2007-08-02
DE102005043244A1 (de) 2007-03-29

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