WO2006040434A2 - Prothese totale du genou et gamme d'elements permettant de constituer cette prothese - Google Patents
Prothese totale du genou et gamme d'elements permettant de constituer cette prothese Download PDFInfo
- Publication number
- WO2006040434A2 WO2006040434A2 PCT/FR2005/002432 FR2005002432W WO2006040434A2 WO 2006040434 A2 WO2006040434 A2 WO 2006040434A2 FR 2005002432 W FR2005002432 W FR 2005002432W WO 2006040434 A2 WO2006040434 A2 WO 2006040434A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- implant
- prosthesis
- rod
- relative
- tibial
- 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
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
- A61F2/38—Joints for elbows or knees
-
- 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
- A61F2/38—Joints for elbows or knees
- A61F2/3868—Joints for elbows or knees with sliding tibial bearing
-
- 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
- A61F2/38—Joints for elbows or knees
- A61F2/3886—Joints for elbows or knees for stabilising knees against anterior or lateral dislocations
Definitions
- the present invention relates to a total knee prosthesis and a range of elements for constituting this prosthesis.
- knee replacements are particularly difficult to perform, the ligaments of the joint being defective or even inoperative and / or the quality of the bone epiphyses not being sufficient to allow a stable support of the femoral implant and the tibial implant.
- knee prostheses some, called “hinged” include a femoral implant bicondylar, a femoral implant mechanically connected to the tibial implant and pivotally guided relative thereto about a given transverse axis, and a fixed intermediate tray made of polyethylene.
- Another type of "hinged" prosthesis comprises a tibial implant provided with a longitudinal pin on which a tubular element connected to the femoral implant is slipped, this fitting making it possible to stabilize the femur and the tibia in the sagittal plane and therefore to overcome the deficiencies of ligaments.
- the implants of these prostheses are provided with fixed anchoring rods, which have the disadvantage of generating significant and localized stresses on the longitudinal stud and on the bone anchors. This results in risks of premature wear of the prosthesis and risks of loosening implants.
- Still another type of "hinged" prosthesis includes a polyethylene tray for distributing stresses on both the tray / femoral implant and tibial plateau / implant interfaces.
- the significant possibility of rotation of the tibial plateau induces instability of the prosthesis when the lower limb is in extension.
- US 5,879,391 discloses a knee prosthesis with adjustable femoral and tibial anchor rods.
- the femoral anchor rod is adjustable in translation in the sagittal plane ( Figures 1 to 6) and the tibial anchor rod is adjustable in translation in the frontal plane ( Figures 7 to 10).
- US 5,236,359 discloses a bone implant comprising a transverse dovetail slide, a base 2 slidably engaged in this slide and an anchor rod connected to the base.
- the slide can be longitudinal.
- the positional adjustments envisaged by these documents do not make it possible to effectively remedy the aforementioned risks of premature wear of the prosthesis and loosening of the implants.
- the present invention aims to solve this problem is, in general, to overcome the disadvantages of existing prostheses.
- Its main objective is to allow the reconstruction of a knee joint by means of a prosthesis that can be perfectly adapted to the specific anatomy of the joint to be treated and thus presenting a reduced risk of wear and loosening.
- Another object of the invention is to provide such a prosthesis, suitable for difficult arthroplasty, that is to say when the ligaments of the joint are failing or even inoperative and / or when the joint has epiphyseal deformities or bone deficiencies due to trauma or previous surgery.
- a further object of the invention is to provide such a prosthesis, having significant stability when the lower limb is extended.
- a further object of the invention is to provide a range of modular elements for constituting a prosthesis perfectly adapted to the specific anatomy of the joint to be treated.
- the prosthesis concerned comprises, in a manner known per se, a femoral implant and a tibial implant equipped with medullary anchoring rods, and an intermediate plateau made of a material that promotes sliding, in particular made of high density polyethylene, each medullary anchorage stem. an implant not being integral with this implant and being connectable thereto, the prosthesis comprising for this purpose means for assembling each medullary anchoring rod with the corresponding implant and clamping means to immobilize each medullary anchor rod relative to the corresponding implant.
- the means that the prosthesis comprises for the assembly of each medullary anchoring rod to the corresponding implant are shaped to allow a plurality of possible angular positions of the medullary anchoring rod with respect to the implant. and a plurality of possible positions of this same medullary anchoring rod relative to the implant in translation along an axis contained either in the frontal plane, that is to say lateral, or in the sagittal plane, it is that is, anteroposterior, of the implant. Thanks to this double possibility of adjusting the position of a medullary anchorage rod relative to the corresponding implant, it is possible to precisely position the anchoring rods with respect to the femoral and tibial implants according to the specific anatomy of the implant. patient and thus obtain optimal functioning of the prosthesis regardless of this anatomy. The prosthesis therefore presents risks of wear and loosening very reduced.
- the means for assembling the femoral anchor rod to the femoral implant are shaped to allow the angular adjustment of the anchor rod in the frontal plane and the translational adjustment of this rod in the sagittal plane. .
- the means for assembling the tibial anchor rod to the tibial implant are shaped to allow the angular adjustment of the anchor rod in the sagittal plane and the translation adjustment of this rod in the frontal plane. .
- the means for assembling the tibial anchor rod to the tibial implant are shaped to allow the angular adjustment of the anchor rod in the sagittal plane and the translation adjustment of this rod in the frontal plane.
- At least one anchor rod is intended to be connected to the corresponding implant by an intermediate connecting piece
- this intermediate assembly piece has means for assembling the rod to it and a curved end wall;
- the implant has a cavity for receiving and retaining said curved end wall, of the same profile as said curved end wall and whose bottom is delimited by a curved receiving wall against which said curved wall of end during assembly;
- this curved wall of reception has an arc length greater than that of said curved end wall, so that this curved end wall, and thus the anchor rod connected thereto, can be positioned at several angular positions relative to to the implant;
- the cavity is profiled along an axis contained either in the frontal plane or in the sagittal plane of the implant so that it allows the sliding of said end curved wall in it to achieve the translational adjustment of the medullary stem anchoring relative to the implant.
- the means for assembling a medullary anchoring rod to an intermediate assembly part comprise:
- this rod integral with the medullary anchoring rod, capable of being screwed into said tapped bore, this rod having a length slightly greater than that of this bore in a manner, in the assembly position of the medullary anchoring rod at the intermediate assembly part, to bear against said curved receiving wall and to thereby clamp the intermediate assembly part against the walls of the implant defining said receiving cavity and retention of said end curved wall.
- This bore, this threaded rod and these walls of the implant thus also form the aforementioned clamping means for immobilizing a medullary anchoring rod relative to the corresponding implant.
- the medullary anchoring rod is screwed to the intermediate connecting piece without complete tightening and the position of the medullary anchoring rod is adjusted; the complete tightening of the medullary anchoring rod relative to the intermediate assembly part is then performed to immobilize this rod and this piece relative to the implant.
- the prosthesis according to the invention may in particular be a prosthesis with limited movement of the femoral implant relative to the tibial implant in translation in the sagittal plane, such as a so-called "postero-stabilized” prosthesis, that is, that includes limiting stops of said translation, or a so-called “hinge” prosthesis, that is to say comprising means for mounting the femoral implant relative to the tibial implant reducing the possibility of movement of the femoral implant relative to the tibial implant to a pivoting along a determined transverse axis.
- the aforementioned dual possibility of adjustment allows the use of such prostheses with restriction of the femoral movement, without exercise of major stresses on the hinge areas of the femoral implant to the tibial implant or on the bone anchoring zones.
- the prosthesis according to the invention may be a prosthesis with two condyles; preferably, it is a prosthesis with three condyles, that is to say having, at the level of the femoral implant and the intermediate plateau, curved support surfaces arranged at the median level, between the condyles side.
- the intermediate plate may be fixed on the tibial implant, or may be movable relative thereto.
- means are provided for limiting the pivoting of the intermediate plate relative to the tibial implant, in particular a stud projecting from the plateau formed by the tibial implant and an arcuate groove centered on the pivot axis of the intermediate plate, arranged in this intermediate plate, this groove receiving said pad and cooperating therewith to limit the pivoting of the intermediate plate relative to the tibial implant.
- the femoral implant and / or the tibial implant comprise means for mounting on them one or more wedges or spacers making it possible to compensate for any absences or bone ablations at the bearing surfaces of the implants against the femur and / or tibia.
- the range of elements according to the invention comprises:
- medullary anchoring rods at least two medullary anchoring rods, and preferably more than two medullary anchoring rods, having lengths, shapes and diameters different, these medullary anchoring rods being assembled to said intermediate assembly parts.
- Said modularity of these elements makes it possible to produce a prosthesis perfectly adapted to the specific anatomy of the joint to be treated.
- Said range may further comprise wedges or spacers compensating for absences or bone ablations, having different thicknesses, adapted to the reconstruction of satisfactory bearing surfaces for the femoral and tibial implants.
- Figure 1 is a perspective view before assembly
- Figure 2 is a perspective view, before assembly, from another angle
- Figure 3 is a perspective view during assembly
- Figures 4 and 5 are perspective views of two intermediate parts of assembly that includes this prosthesis
- FIG. 6 is a view of the prosthesis after assembly, in the sagittal plane, in medial section
- FIG. 7 is a view of the prosthesis in the frontal plane, in section along the line VII-VII of FIG. 6.
- the figures represent a total prosthesis of the knee 1, comprising, as is well known, a femoral implant 2, a tibial implant 3 and an intermediate plate 4.
- the femoral implant 2 has an enveloping shape, in "shield", defining on its outer face two lateral condyles 5 and a prosthetic trochlée 6 and, on its inner face, facets 8 bearing against the end of the bone , duly rescheduled.
- the femoral implant 2 further has a central condyle 9, to increase the bearing surface of the femoral implant 2 against the intermediate plate 4. It further comprises, opening into the facets 8 distal and posterior, threaded blind holes 10 for mounting one or more shims or spacers (not shown), which make it possible to compensate for any absences or bone ablations at the bearing surfaces of the implant 2 against the femur.
- the prosthesis 1 is of the so-called "hinged" type, in which the femoral implant 2 is mechanically connected to the tibia implant! 3 and is guided in pivoting relation thereto around a determined transverse axis in order to overcome the deficiencies of the ligaments of the patient's joint.
- the femoral implant 2 comprises a posterior sheath 11 pivotally mounted relative to it by means of pivots 12 engaged in bearings, these bearings being arranged in two longitudinal partitions 13 that form the femoral implant 2 on its inner face. .
- the sheath 11 is pierced axially and receives a liner 14 of a material promoting sliding, especially high density polyethylene.
- the femoral implant 2 forms, in front of the partitions 13, a solid block 15 in which is provided a groove 16 opening into the proximal face and into the posterior face of this block. 15.
- This groove 16 is profiled along an axis contained in the sagittal plane of the implant 2 and has an arcuate shape in its lower part and a rectangular shape in its upper part, this upper part being narrower than the part lower.
- the groove 16 is intended to receive an intermediate piece 20 for assembly of the medullary stem 21 for anchoring the femoral implant 2 to the femur.
- the part 20 is more particularly visible in FIG. 4. It comprises a curved end wall 20a, in an arc of circle, having an arc length smaller than that of the wall delimiting the bottom of the groove 16, a proximal button 20b, whose base has a width less than that of the upper part of the groove 16, and a bore 20c arranged along the axis of the button 20b, piercing the part 20 from one side to the other and threaded at the base of the button 20b and the wall 20a.
- the wall 20a and the button 20b are intended to be engaged respectively in these lower and upper portions of the groove 16, with the possibility of sliding in the sagittal plane, as shown in lines. interrupted in FIG. 6, and with the possibility of pivoting in the frontal plane, as shown in phantom in FIG.
- the medullary anchoring stem 21 has a distal portion 21a intended to be engaged in the bore 20c, threaded at its end and having a length slightly greater than that of the bore 20c.
- the rod 21-piece assembly 20 can slide and pivot in the groove 16 before complete clamping of the rod 21 with respect to the part 20, and is locked in position after complete tightening. of this rod 21 relative to this piece 20, the distal portion 21a bearing in this position against the rounded boss delimiting the bottom of the groove 16 and consequently clamping the curved wall 20a against the edges of the block 15 delimiting the upper part of this groove. It is thus possible to adjust the position of the medullary stem 21 relative to the femoral implant 2 in anteroposterior sliding and inclination in the frontal plane and then to immobilize this rod 21 in the chosen position.
- the rod 21 has two flats 25 allowing the support of a suitable clamping tool.
- the tibial implant 3 forms a plate 30 for reconstituting the upper plateau of the tibia.
- this plate 30 comprises a rear stud 31 intended to be fitly received in the lining 14 of the sleeve 11 and an anterior pin 32 intended to cooperate with a groove 43 of the intermediate plate 4.
- the Tray 30 On its distal face, the Tray 30 has a block 35 integral with it, in which is provided a groove 36 and side walls 37 for strengthening and wedging relative to the bone.
- the groove 36 extends in a medial direction and is contoured, and has a shape similar to that of the groove 16.
- the tibial implant 3 receives a medullary anchoring stem 21 identical to the medullary stem 21 for anchoring the femoral implant 2, by means of an intermediate assembly part.
- this piece 34 comprises a curved wall 34a, a conical knob 34b and a bore 34c partially tapped.
- This piece 34 and the groove 36 allow adjustment of the position of the rod 21 in inclination in the sagittal plane, as shown in Figure 6 in broken lines, and in sliding in the medial direction, as shown in Figure 7 in broken lines.
- the figures further show that the plate 30 can receive against its underside a wedge or spacer 38 to compensate for any absences or ablations bone at the bearing surfaces of the implant 3 against the tibia.
- This shim or spacer 38 comprises an opening 39 of suitable shape for its engagement around the block 35 and the walls 37, as shown in Figure 2.
- the intermediate plate 4 is made of a material promoting sliding, especially high density polyethylene. It comprises two lateral glenoid cavities 40, for receiving the lateral condyles 5, a median anterior eminence 41 intended to cooperate with the central condyle 9 of the femoral implant 2, a posterior bore 42 for receiving the sheath 11 and the aforementioned groove 43 intended to cooperate with the anterior block 32.
- the bore 42 allows pivoting of the femoral implant assembly 2- intermediate plate 4 about the axis of the stud 31, and the groove 43, centered on the axis of the bore 42 , cooperates with the stud 32 to limit this pivoting to a sector defined by the positions of the stud 32 coming into abutment against the ends of this groove 43.
- the medullary rods 21 are connected by screwing to the intermediate parts of respective assemblies 20, 34 without complete tightening and the appropriate positions of the rods 21 are adjusted; the complete tightening of the rods 21 relative to the parts 20 and 34 is then performed to immobilize these rods and these parts relative to the implants 2, 3.
- the invention provides a prosthesis with the decisive advantages of being perfectly adapted to the specific anatomy of the joint to be treated, thereby presenting a reduced risk of wear and loosening, of being able to to be adapted to difficult arthroplasty, and to have a high stability when the lower limb is in extension.
- the term "medullary stem anchorage" should be understood in a broad sense, including short rods similar to "pads"; the plurality of angular positions of a medullary anchoring rod could be obtained by means of a ball joint type; the plurality of translational positions could be obtained by sliding a slide on a rail or in a slide.
Landscapes
- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Physical Education & Sports Medicine (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
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP05809237A EP1799158A2 (fr) | 2004-10-07 | 2005-10-04 | Prothese totale du genou et gamme d'elements permettant de constituer cette prothese |
| US12/524,806 US20110137425A1 (en) | 2004-10-07 | 2005-10-04 | Total knee prosthesis and range of elements for producing said prosthesis |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0410573A FR2876276B1 (fr) | 2004-10-07 | 2004-10-07 | Prothese totale du genou et gamme d'elements permettant de constituer cette prothese |
| FR0410573 | 2004-10-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2006040434A2 true WO2006040434A2 (fr) | 2006-04-20 |
| WO2006040434A3 WO2006040434A3 (fr) | 2006-06-01 |
Family
ID=34949914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR2005/002432 Ceased WO2006040434A2 (fr) | 2004-10-07 | 2005-10-04 | Prothese totale du genou et gamme d'elements permettant de constituer cette prothese |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20110137425A1 (fr) |
| EP (1) | EP1799158A2 (fr) |
| FR (1) | FR2876276B1 (fr) |
| WO (1) | WO2006040434A2 (fr) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007114841A1 (fr) * | 2006-04-04 | 2007-10-11 | Smith & Nephew, Inc. | Systemes et procedes de couplage d'essai |
| FR2949668B1 (fr) * | 2009-09-08 | 2012-08-31 | Ohst Medizintechnik Ag Et Iso | Prothese de genou |
| DE102011001840A1 (de) * | 2011-04-06 | 2012-10-11 | Aesculap Ag | Kniegelenkendoprothesensystem |
| FR3057760B1 (fr) * | 2016-10-21 | 2018-10-26 | Fournitures Hospitalieres Ind | Gamme pour prothese de genou |
| WO2019145965A1 (fr) | 2018-01-25 | 2019-08-01 | Nonferrous Materials Technology Development Centre | Prothèse totale du genou pour fémur distal à rotation tibiale-fémorale à petit angle auto-limitante |
| CN112618114A (zh) * | 2020-11-27 | 2021-04-09 | 北京市春立正达医疗器械股份有限公司 | 一种钽金属骨小梁股骨髁假体及膝关节置换体 |
| CN117100466B (zh) * | 2023-10-20 | 2023-12-29 | 南方医科大学珠江医院 | 膝关节翻新手术中胫骨延长杆 |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2684290B1 (fr) * | 1991-11-29 | 1994-01-21 | Tornier Ets | Prothese du genou. |
| US5824102A (en) * | 1992-06-19 | 1998-10-20 | Buscayret; Christian | Total knee prosthesis |
| US5776201A (en) * | 1995-10-02 | 1998-07-07 | Johnson & Johnson Professional, Inc. | Modular femoral trial system |
| US6171342B1 (en) * | 1996-07-23 | 2001-01-09 | Depuy Orthopaedics, Inc. | Medical fastening system |
| US5879391A (en) * | 1996-09-30 | 1999-03-09 | Johnson & Johnson Professional, Inc. | Modular prosthesis |
| EP0834294A1 (fr) * | 1996-10-07 | 1998-04-08 | Sulzer Orthopädie AG | Prothèse modulaire cimentée |
| FR2814361B1 (fr) * | 2000-09-22 | 2002-12-20 | Implants Ind | Prothese de genou, totale et modulaire |
| US20020120341A1 (en) * | 2001-02-23 | 2002-08-29 | Stumpo David J. | Prosthetic revision knee system |
| US6953479B2 (en) * | 2001-07-16 | 2005-10-11 | Smith & Nephew, Inc. | Orthopedic implant extension |
-
2004
- 2004-10-07 FR FR0410573A patent/FR2876276B1/fr not_active Expired - Lifetime
-
2005
- 2005-10-04 US US12/524,806 patent/US20110137425A1/en not_active Abandoned
- 2005-10-04 WO PCT/FR2005/002432 patent/WO2006040434A2/fr not_active Ceased
- 2005-10-04 EP EP05809237A patent/EP1799158A2/fr not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| EP1799158A2 (fr) | 2007-06-27 |
| FR2876276B1 (fr) | 2007-11-02 |
| US20110137425A1 (en) | 2011-06-09 |
| FR2876276A1 (fr) | 2006-04-14 |
| WO2006040434A3 (fr) | 2006-06-01 |
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