EP1304964A1 - Dispositif pour aligner un gabarit de guidage - Google Patents

Dispositif pour aligner un gabarit de guidage

Info

Publication number
EP1304964A1
EP1304964A1 EP00945515A EP00945515A EP1304964A1 EP 1304964 A1 EP1304964 A1 EP 1304964A1 EP 00945515 A EP00945515 A EP 00945515A EP 00945515 A EP00945515 A EP 00945515A EP 1304964 A1 EP1304964 A1 EP 1304964A1
Authority
EP
European Patent Office
Prior art keywords
support element
guide template
transverse axis
plane
axis
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.)
Withdrawn
Application number
EP00945515A
Other languages
German (de)
English (en)
Inventor
Nicolas Zirngibl
Roland Herzog
Peter Bauer
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 Merck GmbH
Original Assignee
Biomet Merck 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 Merck GmbH filed Critical Biomet Merck GmbH
Publication of EP1304964A1 publication Critical patent/EP1304964A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/14—Surgical saws ; Accessories therefor
    • A61B17/15—Guides therefor
    • A61B17/154—Guides therefor for preparing bone for knee prosthesis
    • A61B17/155—Cutting femur

Definitions

  • the invention relates to a device for aligning a guide template for the distal femoral incision in unicompartmental joint replacements according to the preamble of claim 1.
  • a device with several precision instruments for making saw cuts on bones, in particular the femur bordering the knee joint and the tibia is known from US Pat. No. 4,524,766 PETERSEN.
  • the various resection cuts on the femur and on the tibia are carried out in this known device with various precision instruments which are sequentially attached to the femur or to the tibia.
  • These known precision instruments are used to align the guide templates, which are then screwed to the bone. The precision instruments can then be removed and the cuts made by the surgeon.
  • Another such device is known from EP 0 322 363 WEHRLI.
  • the guide templates are aligned by previously attaching instruments and then screwed to the bone.
  • the disclosed instruments comprise two reference arms, which are fixed laterally to the tibia by means of two bulwark screws, and a scale, which is preferably attached to the reference arms about 10 cm from the tibia axis.
  • a guide rail is attached to the scale, on which the guide template is movably arranged and can be brought precisely into the desired position.
  • a disadvantage of both of these known devices is their relatively large volume, which requires large openings in the soft parts surrounding the joint.
  • the invention seeks to remedy this.
  • the invention has for its object to provide a device for aligning guide templates with a minimal volume.
  • the aim of the invention is to achieve that the natural geometry of the knee is to be restored by its use.
  • unicondylar (unicompartmental) knee replacement (sled prosthesis) it is important that the prosthesis is ideally adapted to the natural conditions. Particular attention must be paid to the knee joint line and the ligamentous apparatus.
  • the invention achieves the stated object with a device for aligning a guide template for the distal femoral cut in unicompartmental joint replacements, which has the features of claim 1.
  • the device according to the invention essentially comprises two support elements, each with a support surface, which can be brought into a plane and are intended for contact with a condyle of a femur, at least one rod-shaped cross member arranged parallel to a transverse axis, which is connected at the end to the first support element and can be connected to the second support element, the transverse axis running parallel to the plane.
  • the device according to the invention comprises a guide template.
  • the guide template can be displaced parallel to the plane and relative to the second support element by means of positioning means and can be detachably locked in a desired position.
  • the second support element is non-rotatable with respect to rotation about the transverse axis and can be displaced coaxially to the transverse axis on the at least one cross member and can also be locked in a desired position, so that the support surfaces can be individually adapted to the medial / lateral condyle spacings of different femurs.
  • the second support element comprises an insert element containing the second support surface, which is displaceable coaxially to a central axis perpendicular to the plane and relative to the second support element.
  • the second support element preferably contains a bore with an internal thread coaxial to the central axis, so that the insert element can be displaced coaxially to the central axis by means of an adjusting screw which can be screwed into the internal thread.
  • the device in another embodiment, it comprises a first cross member and a second cross member, while two parallel bores for receiving the cross members are provided on the second support element, so that the second support element can be rotated on the cross members with respect to rotation about the transverse axis and by means of a first Fixing screw is lockable.
  • the positioning means comprise at least one rod segment of the crossmember projecting beyond the second support element opposite the first support element and a second fixing screw, so that the guide template can rotate with respect to the rotation about the transverse axis, can be displaced coaxially to the transverse axis and by means of the second fixing screw is releasably lockable.
  • the guide template is guided from the medial or lateral to the femur.
  • the positioning means comprise at least one longitudinal beam arranged parallel to a longitudinal axis and connected to the second support element, and a second fixing screw.
  • the longitudinal axis runs parallel to the plane and is perpendicular to the transverse axis.
  • Another advantage is that fewer surgical instruments are required, which enables a simpler surgical technique and an easier instrument case for the operating personnel.
  • Figure 1 is a perspective view of an embodiment of the device according to the invention.
  • FIG. 2 shows a perspective illustration of a further embodiment of the device according to the invention
  • 3 shows a view from the anterior of the femur with the first and second support elements applied according to an embodiment of the device according to the invention.
  • the device comprises two support elements 5; 12, each with a support surface 3; 6, which are placed on the distal femoral condyles, two rod-shaped cross members 10; 11 arranged parallel to the transverse axis 2 and also parallel to the plane 1, and a guide template 20.
  • the first support element 12 is pushed under the kneecap pushed aside and placed distally on the healthy condyle. So that the cartilage of the condyle is not damaged, the first support element 12 is made of plastic.
  • the second support element 5 comprises an insert element 13 (FIG.
  • the crossbeams 10; 11 are permanently connected to the first support element 12, while the second support element 5 has two bores 22; 23 running parallel to the transverse axis 2 for receiving the crossbeams 10; 11, so that the second support element 5 rotates about the transverse axis 2 is rotatably displaceable on the cross members 10; 11.
  • the axial distance of the two support surfaces 3; 6 with respect to the transverse axis 2 can thus be changed depending on the size of the knee.
  • the aim of this adaptation is that the contact surfaces 3, 6 come to lie on the highest points of the condyles.
  • the second support element 5 can be releasably locked at the desired distance from the first support element 12 on the cross members 10; 11.
  • the first fixing screw 28 also serves to align the device relative to the mechanical axis of the femur 21 and is therefore relatively long. After the alignment of the device relative to the mechanical axis of the femur 21 has been carried out, the device is fixed on the damaged condyle 25 by the set screw 7 which is pierced by means of a pin (not shown).
  • the guide template 20 which is designed as a cutting block, can be rotated and coaxially with respect to rotation about the transverse axis 2 by means of positioning means 26, which comprise two rod segments 27 of the crossbeams 10; move to the transverse axis 2 and can be releasably locked by means of the second fixing screw 29.
  • the second fixing screw 29 is also long and, like the first fixing screw 28, also serves to align the device.
  • the guide template 20 is moved on the cross members 10, 11 until it lies completely against the damaged condyle 25.
  • the second fixing screw 29 is then tightened and the guide template 20 on the cross members 10; 11 fixed.
  • the guide template 20 is also provided parallel to the plane 1 and parallel to the transverse axis 2 with mounting holes 30 (Fig. 2). After the device is aligned on the femur 21 and the guide template 20 has been fixed on the cross members 10; 11, the guide template 20 is attached to the femur 21 by means of pins (not shown) which are set through the fastening bores 30 (FIG. 2). After setting the pins, the connecting screw 31 (FIG. 2) between the guide template 20 and the positioning means 26 is loosened, the pin is pulled out again by the adjusting screw 7 and the alignment instruments are removed. Only the guide template 20 remains on the femur 21 for performing the cut on the femur 21. FIG.
  • FIG. 2 shows an embodiment of the device according to the invention, which differs from the embodiment shown in FIG. 1 only in that the positioning means 26 have two longitudinal beams 14; 15 include.
  • the two longitudinal beams 14; 15 have first ends 16; 17, second ends 18; 19 and are arranged parallel to a longitudinal axis 4, which runs parallel to plane 1 (FIG. 1) and perpendicular to transverse axis 2.
  • the longitudinal beams 14; 15 are with their first ends 16; 17 connected to the second support element 5 and protrude ventrally above this.
  • the guide template 20 is connected by means of a connecting element 34 with respect to rotation about the longitudinal axis 4 in a manner fixed against rotation and displaceable coaxially to the longitudinal axis 4 with the longitudinal beams 14; 15. Analogous to the embodiment shown in FIG.
  • the device comprises a second fixing screw 29, by means of which the displacement element 34 with the guide template 20 can be axially locked in a desired position on the longitudinal beams 14; 15.
  • the connection between the guide template 20 and the connecting element 34 takes place by means of a connecting screw 31.
  • the guide template 20 is provided with fastening bores 30 running parallel to the plane 1 and parallel to the longitudinal axis 4, so that the guide template 20 by means of pins (not shown), which through the mounting holes 30 are set, can be attached to the femur 21.
  • the second support element 5 has an upper bore 22 and a lower bore 23 parallel to the transverse axis 2 for receiving the two cross members 10; 11, so that the second support element 5 can be rotated on the cross members 10; 11 and rotated by means of rotation about the transverse axis 2 and by means of the first fixing screw 28 can be locked.
  • the second support element 5 comprises a bore with an internal thread 8 coaxial with the central axis 9, so that the insert element 13 can be screwed into the internal thread 8 by means of the set screw 7 is, coaxial to the central axis 9 is displaceable.
  • the contact surfaces 3; 6 lie on the highest points of the distal condyles 24; 25.
  • the set screw 7 is unscrewed so that the second contact surface 6 rests on the damaged condyle 25.
  • a knee joint line 32 is set through the two contact surfaces 3; 6, which reproduces the “old” knee joint line 32 when the knee joint is damaged.
  • the “new” knee joint line 33 represents the knee joint line 33 after the implantation of the knee joint replacement.

Landscapes

  • Health & Medical Sciences (AREA)
  • Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biomedical Technology (AREA)
  • Medical Informatics (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Transplantation (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Dentistry (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)
  • Prostheses (AREA)

Abstract

L'invention concerne un dispositif servant à aligner un gabarit de guidage pour la section fémorale distale dans des parties de remplacement d'articulations unicompartimentales et comprend sensiblement A) deux éléments d'appui (5; 12) présentant chacun une surface d'appui (3; 6), pouvant être placés dans un plan (1) et déterminés pour être appliqués dans chaque cas sur chaque condyle (24; 25) de fémur (21) ; B) au moins une barre transversale (10; 11) sous forme de barre, parallèle à un axe transversal (2), qui peut être reliée en position finale avec le premier élément d'appui (12) et avec le second élément d'appui (5), l'axe transversal (2) étant parallèle au plan (1) ; et C) un gabarit de guidage (20) qui peut être déplacé par des éléments de positionnement (26) parallèlement au plan (1) et par rapport au second élément d'appui (5) et être arrêté de manière amovible, D) le second élément d'appui (5) étant déplaçable en termes de rotation de manière à être bloqué en rotation autour de l'axe transversal (2) et coaxialement à l'axe transversal (2) sur la traverse transversale (10; 12) (au moins au nombre de une) et à être arrêté de manière amovible.
EP00945515A 2000-07-28 2000-07-28 Dispositif pour aligner un gabarit de guidage Withdrawn EP1304964A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CH2000/000410 WO2002009596A1 (fr) 2000-07-28 2000-07-28 Dispositif pour aligner un gabarit de guidage

Publications (1)

Publication Number Publication Date
EP1304964A1 true EP1304964A1 (fr) 2003-05-02

Family

ID=4358111

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00945515A Withdrawn EP1304964A1 (fr) 2000-07-28 2000-07-28 Dispositif pour aligner un gabarit de guidage

Country Status (4)

Country Link
US (1) US6814735B1 (fr)
EP (1) EP1304964A1 (fr)
CA (1) CA2416114A1 (fr)
WO (1) WO2002009596A1 (fr)

Families Citing this family (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7635390B1 (en) 2000-01-14 2009-12-22 Marctec, Llc Joint replacement component having a modular articulating surface
US6610067B2 (en) 2000-05-01 2003-08-26 Arthrosurface, Incorporated System and method for joint resurface repair
US7163541B2 (en) 2002-12-03 2007-01-16 Arthrosurface Incorporated Tibial resurfacing system
US7678151B2 (en) 2000-05-01 2010-03-16 Ek Steven W System and method for joint resurface repair
US7713305B2 (en) 2000-05-01 2010-05-11 Arthrosurface, Inc. Articular surface implant
EP2314257B9 (fr) 2000-05-01 2013-02-27 ArthroSurface, Inc. Système de réparation de rectification de joint
US8177841B2 (en) 2000-05-01 2012-05-15 Arthrosurface Inc. System and method for joint resurface repair
US7901408B2 (en) 2002-12-03 2011-03-08 Arthrosurface, Inc. System and method for retrograde procedure
US8388624B2 (en) 2003-02-24 2013-03-05 Arthrosurface Incorporated Trochlear resurfacing system and method
DE50309180D1 (de) * 2003-09-13 2008-03-27 Aesculap Ag & Co Kg Vorrichtung zur bestimmung des winkels zwischen femur und tibia
US7951163B2 (en) 2003-11-20 2011-05-31 Arthrosurface, Inc. Retrograde excision system and apparatus
AU2006203909A1 (en) 2003-11-20 2006-07-13 Arthrosurface, Inc. System and method for retrograde procedure
JP2007512108A (ja) 2003-11-20 2007-05-17 アースロサーフィス・インコーポレーテッド 表面再形成デバイスの退歩的配送
US20050192588A1 (en) * 2004-02-27 2005-09-01 Garcia Daniel X. Instrumentation and method for prosthetic knee
WO2006004885A2 (fr) 2004-06-28 2006-01-12 Arthrosurface, Inc. Systeme de remplacement de surface articulaire
US7828853B2 (en) 2004-11-22 2010-11-09 Arthrosurface, Inc. Articular surface implant and delivery system
US20070233156A1 (en) * 2006-02-16 2007-10-04 Robert Metzger Surgical instrument
US7938833B2 (en) * 2006-11-14 2011-05-10 Howmedica Osteonics Corp. Adjustable resection guide
EP2136717B1 (fr) 2006-12-11 2013-10-16 Arthrosurface Incorporated Appareil de résection rétrograde
US8265949B2 (en) 2007-09-27 2012-09-11 Depuy Products, Inc. Customized patient surgical plan
US8357111B2 (en) 2007-09-30 2013-01-22 Depuy Products, Inc. Method and system for designing patient-specific orthopaedic surgical instruments
EP2957243A1 (fr) 2007-09-30 2015-12-23 DePuy Products, Inc. Instrument chirurgical orthopédique personnalisé spécifique d'un patient
WO2011106400A1 (fr) 2010-02-25 2011-09-01 Depuy Products, Inc. Blocs de coupe tibiale spécifiques à un patient personnalisés
US9173662B2 (en) 2007-09-30 2015-11-03 DePuy Synthes Products, Inc. Customized patient-specific tibial cutting blocks
EP2262448A4 (fr) 2008-03-03 2014-03-26 Arthrosurface Inc Système de resurfaçage d'os et procédé
US9662126B2 (en) 2009-04-17 2017-05-30 Arthrosurface Incorporated Glenoid resurfacing system and method
US10945743B2 (en) 2009-04-17 2021-03-16 Arthrosurface Incorporated Glenoid repair system and methods of use thereof
CA2759027C (fr) 2009-04-17 2020-02-25 Arthrosurface Incorporated Systeme et procede de re-surfacage de glenoide
EP2538864B1 (fr) 2010-02-25 2018-10-31 DePuy Products, Inc. Blocs de coupe osseuse spécifiques à un patient personnalisés
EP2538853A4 (fr) 2010-02-25 2016-07-27 Depuy Products Inc Blocs de coupe osseuse spécifiques à un patient personnalisés
WO2011106407A1 (fr) 2010-02-25 2011-09-01 Depuy Products, Inc. Procédé de fabrication de blocs de coupe osseuse spécifiques à un patient personnalisés
AU2011222404A1 (en) 2010-03-05 2012-09-27 Arthrosurface Incorporated Tibial resurfacing system and method
US9066716B2 (en) 2011-03-30 2015-06-30 Arthrosurface Incorporated Suture coil and suture sheath for tissue repair
US8641721B2 (en) 2011-06-30 2014-02-04 DePuy Synthes Products, LLC Customized patient-specific orthopaedic pin guides
EP2804565B1 (fr) 2011-12-22 2018-03-07 Arthrosurface Incorporated Système pour une fixation osseuse
DE112013003358T5 (de) 2012-07-03 2015-03-19 Arthrosurface, Inc. System und Verfahren für Gelenkoberflächenersatz und -reparatur
US9492200B2 (en) 2013-04-16 2016-11-15 Arthrosurface Incorporated Suture system and method
US11607319B2 (en) 2014-03-07 2023-03-21 Arthrosurface Incorporated System and method for repairing articular surfaces
US9861492B2 (en) 2014-03-07 2018-01-09 Arthrosurface Incorporated Anchor for an implant assembly
US10624748B2 (en) 2014-03-07 2020-04-21 Arthrosurface Incorporated System and method for repairing articular surfaces
WO2019028344A1 (fr) 2017-08-04 2019-02-07 Arthrosurface Incorporated Implant de surface articulaire à composants multiples
US11051829B2 (en) 2018-06-26 2021-07-06 DePuy Synthes Products, Inc. Customized patient-specific orthopaedic surgical instrument
WO2020186099A1 (fr) 2019-03-12 2020-09-17 Arthrosurface Incorporated Systèmes et procédés d'implant articulaire gléno-huméral

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4487203A (en) * 1981-11-03 1984-12-11 Androphy Gary W Triplanar knee resection method
US4524766A (en) 1982-01-07 1985-06-25 Petersen Thomas D Surgical knee alignment method and system
US4938762A (en) 1987-12-16 1990-07-03 Protek Ag Reference system for implantation of condylar total knee prostheses
US4935023A (en) * 1989-01-09 1990-06-19 Dow Corning Wright Femoral surface shaping guide for knee implants
US5122144A (en) * 1989-09-26 1992-06-16 Kirschner Medical Corporation Method and instrumentation for unicompartmental total knee arthroplasty
US5108396A (en) * 1990-06-07 1992-04-28 Smith & Nephew Richards Inc. Intramedullary referenced humeral head resection guide
FR2664157B1 (fr) 1990-07-06 1992-10-30 Jbs Sa Guide de coupe femoral.
US5254119A (en) * 1991-08-23 1993-10-19 Schreiber Saul N Osteotomy device and method therefor
US5514143A (en) 1991-11-27 1996-05-07 Apogee Medical Products, Inc. Apparatus and method for use during surgery
US5484446A (en) * 1994-06-27 1996-01-16 Zimmer, Inc. Alignment guide for use in orthopaedic surgery
JPH0846377A (ja) * 1994-08-04 1996-02-16 Fujitsu Ltd プリント配線板パッケージ収容用シェルフ
FR2732886B1 (fr) * 1995-04-13 1997-10-31 France Bloc Sa Guide de coupe rotulienne pour la mise en place de la rotule prothetique de la prothese de genou
CA2220899A1 (fr) * 1995-05-26 1996-11-28 Mathys Medizinaltechnik Ag Ensemble d'instruments pour osteotomie corrective de l'extremite inferieure
US5916219A (en) * 1997-02-10 1999-06-29 Matsuno; Shigeo Tibial plateau resection guide
US6013081A (en) * 1998-09-09 2000-01-11 Sulzer Orthopedics Inc. Apparatus and method for anterior and posterior referenced sizing and distal femur resection
US6685711B2 (en) * 2001-02-28 2004-02-03 Howmedica Osteonics Corp. Apparatus used in performing femoral and tibial resection in knee surgery
FR2826254B1 (fr) * 2001-06-25 2004-06-18 Aesculap Sa Dispositif de positionnement d'un plan de coupe d'un guide de coupe d'un os

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0209596A1 *

Also Published As

Publication number Publication date
US6814735B1 (en) 2004-11-09
WO2002009596A1 (fr) 2002-02-07
CA2416114A1 (fr) 2003-01-27

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