WO2003015645A1 - Interspinale prothese - Google Patents
Interspinale prothese Download PDFInfo
- Publication number
- WO2003015645A1 WO2003015645A1 PCT/CH2001/000509 CH0100509W WO03015645A1 WO 2003015645 A1 WO2003015645 A1 WO 2003015645A1 CH 0100509 W CH0100509 W CH 0100509W WO 03015645 A1 WO03015645 A1 WO 03015645A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- prosthesis
- counterpart
- interspinal
- extensions
- central axis
- Prior art date
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
- A61B17/56—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, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7062—Devices acting on, attached to, or simulating the effect of, vertebral processes, vertebral facets or ribs ; Tools for such devices
- A61B17/7068—Devices comprising separate rigid parts, assembled in situ, to bear on each side of spinous processes; Tools therefor
Definitions
- the invention relates to an interspinous prosthesis according to the preamble of patent claim 1, a counterpart thereto and a combined, multi-part interspinous prosthesis.
- Such prostheses serve as spacers for two adjacent vertebral bodies in a defective disc, which would otherwise reduce the distance between the vertebral bodies. The enlarged distance also relieves the facet joints.
- interspinous prosthesis which comprises a centerpiece to be inserted into the interspinal space, from which cranially and caudally each pair of ears originate to the right and left of the middle piece, around the middle piece in the space between the spinous processes (processus spinosus).
- a disadvantage of this known prosthesis is its one-piece nature, which complicates the implantation, so that the removal of the supraspinal ligament is required. The removal of this ligament has the further disadvantage that the prosthesis after dorsal has no secure grip.
- the invention aims to remedy this situation.
- the invention is based on the problem of providing an interspinous prosthesis which can be implanted while maintaining the supraspinal ligament, so that the operation can be done more gently overall and securing the implant is ensured dorsally without additional funds.
- the invention solves this problem with a multi-part, interspinous prosthesis, wherein the individual parts may have different mechanical properties.
- the interspinous prosthesis according to the invention essentially comprises a middle part insertable into the interspinous space and having a central axis and two extensions projecting radially outward and diametrically to the central axis and insertable into the space between the spinous processes of two adjacent vertebral bodies. Furthermore, an axial recess is provided on the central part facing away from the projections, inner end, which serves to receive a prosthesis to the substantially symmetrical counterpart.
- the middle part has coupling means with which the counterpart can be fixed to the prosthesis.
- the coupling means are such that the positions of the projections on the prosthesis and the positions of the projections on the counterpart with a fixed counterpart are determined relative to each other.
- the coupling means consist of a bayonet closure, which has a stop, so that take on projections attached to the prosthesis counterparts prosthesis and counterpart their desired positions.
- the two parts can be fixed together by a screw or cone connection, in which case the prosthesis and the counterpart preferably have an anti-rotation, so that the counterpart can be inserted only in a certain position in the axial recess on the prosthesis .
- Another embodiment of the coupling means consists in at least one elastically deformable cam, which can be locked or latched to this after the assembly of prosthesis and counterpart.
- the coupling means comprise at least one elastically deformable cam, which is elastically deformable when assembling the prosthesis and the counterpart and, after joining the prosthesis and the counterpart, into a complete denture. mental depression can be latched.
- the middle part at its narrowest point in the region of the inner end has an area of 50 to 300 mm 2 , preferably from 70 to 250 mm 2 ;
- b) has an area of 70 to 500 mm 2 , preferably 100 to 450 mm 2 by the extensions.
- the prosthesis is preferably made of an elastic material, so that the middle part is radially elastically deformable. Sufficient radial, elastic deformability can be achieved by producing the prosthesis from plastic or by designing the middle part with radially elastically deformable tongues.
- the prosthesis can be manufactured from an elastomer, silicone or a polymer from the polycarbonate family. However, it is also possible to manufacture the prosthesis from a metallic material if, by means of suitable mechanical devices, an elasticity of the prosthesis in the region of the middle part is realized, which comes to rest in the interspinous space.
- the latter is hollow, wherein the hollow walls can be made collapsible and / or expandable by filling the cavity.
- the collapsible hollow walls have the advantage that thereby a greater deformation of the prosthesis can be made possible, as would allow an elastic material.
- the middle part can be configured smooth or roughened on its outer surface.
- the design of the outer surface can influence the growth of the bone, whereby a rough outer surface promotes the growth of the bone on the prosthesis, while a smooth outer surface makes this growth more difficult or even impossible.
- the surface of the implant which is in contact with the bone can also be protected by embedding hydroxilapatite (HA).
- the counterpart according to the invention comprises an inner end, an outer end and two protruding at the outer end, also radially and diametrically extending projections, which can be used in the space opposite the prosthesis between the spinous processes of two adjacent vertebrae.
- a pin is attached to the counterpart directed against the inner end, which is insertable into the recess on the prosthesis. This makes it possible to achieve an exact alignment of the prosthesis and its counterpart during implantation.
- the counterpart can be equipped with analogous or complementary coupling means.
- these coupling means may include a bayonet lock, elastically deformable cams, or a threaded or tapered connection.
- an analogue, respectively complementary anti-twist device can be attached to the counterpart.
- the preferred embodiment of the inventive interspinous prosthesis with a counterpart is characterized in that in the assembled state has a symmetry plane orthogonal to the central axis, the extensions of the interspinous prosthesis to those of the counterpart parallel to the central axis a distance of at least 2 mm, preferably at least 3 mm.
- the maximum distance of the extensions of the interspinous prosthesis and that of the counterpart is 15 mm, preferably 12 mm.
- FIG. 1a shows a section through the preferred embodiment of the inventive interspinous prosthesis with counterpart
- FIG. 1b shows a side view of the embodiment of the prosthesis with counterpart according to the invention shown in FIG. 1a;
- FIG. 1a shows a section through the preferred embodiment of the inventive interspinous prosthesis with counterpart
- FIG. 1b shows a side view of the embodiment of the prosthesis with counterpart according to the invention shown in FIG. 1a;
- FIG. 1a shows a section through the preferred embodiment of the inventive interspinous prosthesis with counterpart
- FIG. 1b shows a side view of the embodiment of the prosthesis with counterpart according to the invention shown in FIG. 1a
- FIG. 1a shows a section through the preferred embodiment of the inventive interspinous prosthesis with counterpart
- FIG. 1b shows a side view of the embodiment of the prosthesis with counterpart according to the invention shown in FIG. 1a
- FIG. 1a shows a section through the preferred embodiment of the inventive interspinous prosthesis with counterpart
- FIG. 1b shows a side view of the embodiment
- FIG. 2 shows a section through another embodiment of the inventive interspinous prosthesis with counterpart.
- Fig. 5 is a view of another embodiment of the inventive interspinous prosthesis with counterpart.
- the interspinous prosthesis 1 is shown with the counterpart 6 in an assembled state.
- the middle part 2 of the prosthesis 1 adjoins the counterpart 6 with the inner end 7 of the prosthesis 1.
- the two extensions 3 are arranged perpendicular to the central axis 4 and diametrically opposite one another.
- the extensions 3 are designed in the embodiment shown here as halves of an ellipsoidal body.
- the likewise radially and diametrically opposite extensions 3 of the counterpart 6 are arranged symmetrically to a plane orthogonal to the central axis 4.
- prosthesis 1 and counterpart 6 serve three radial, and in parallel to the central axis 4 considered cross-section of the prosthesis 1 symmetrically arranged cam 17, which protrude at the middle part 2 at the inner end 7 of the prosthesis 1 and engage in complementary grooves 18 on the counterpart 6.
- the central part 2 comprises a depression 5, which penetrates from the inner end 7 into the prosthesis 1 to a depth T.
- the counterpart 6 has a pin 16, which is configured complementary to the recess 5 and thus when inserting the prosthesis 1 and counterpart 6 in the recess 5 can be inserted.
- the prosthesis 1 comprises a fixing bolt 19 with a bolt head 26 which can be brought into abutment on the outer end 8 of the prosthesis 1.
- the fixing bolt 19 can be made coaxial with the central axis 4 by the prosthesis 1 and can be locked in the journal 16 of the counterpart 6 by means of a bayonet closure 27 that thus the prosthesis 1 with the counterpart 6 is releasably lockable.
- the fixing bolt 19 and the counterpart 6 are continuously penetrated by a coaxial bore 4 to the central axis 4, so that the prosthesis 1 and the counterpart 6 are radially collapsible.
- Fig. 2 shows a further embodiment of the prosthesis 1 with the counterpart 6 in the assembled state.
- the recess 5 penetrates the prosthesis 1 coaxially from the inner end 7 to the outer end 8.
- the pin 16 on the counterpart 6 is inserted when joining prosthesis 1 and counterpart 6 in the through recess to the inner end 7 of the prosthesis 1 on the extensions. 3 of the counterpart 6 strikes.
- the counterpart 6 is pierced through between the outer end 15 and the inner end 14 with a bore 20 throughout.
- the coupling means 11 are designed as a screw connection, wherein the screw 21 is performed through the recess 5 on the prosthesis 1 and through the bore 20 on the counterpart 6 from the outer end 8 of the prosthesis 1 to the outer end 15 of the counterpart 6 and with a nut 22nd is lockable.
- the prosthesis 1 is designed with a cavity 12, so that the cavity walls 13 are either collapsible or expandable by filling the cavity 12 with a filling material.
- the embodiment shown in Fig. 3 differs from the embodiments described above in that the pin 16 is performed on the counterpart 6 completely through the recess 5 on the prosthesis 1, so that the inner end 14 of the counterpart 6 with the outer end 8 of Prosthesis 1 is aligned. Furthermore, the counterpart 6 has a plurality of through holes 20 extending from the inner end 14 to the outer end 15, the bore axes of which run parallel to the central axis 4. Through these holes 20 Cerclagerähte 23 are feasible, which serve to fix the interspinous prosthesis 1 and the counterpart 6.
- the embodiment shown in FIG. 4 differs from the embodiment shown in FIG. embodiments provided only in that the coupling means 11 comprise a locking pin 28, which is feasible by the coaxial to the central axis 4, the prosthesis 1 and the counterpart 6 penetrating bore 20.
- the locking pin 28 is its head 29 at the outer end 15 of the counterpart 6 for conditioning and has at its tip radially elastically deformable cam 31, which in assembled prosthesis 1 and counterpart 6 in a background rotation 30, whose diameter is greater than the diameter of the bore 20 is, can engage, so that the prosthesis 1 and the counterpart 6 are held together.
- the cam 31 can be compressed by means of axially arranged slots 32 perpendicular to the central axis 4, so that the locking pin 28 through the bore 20 is feasible, while in the assembled state, the cams 31 resiliently spring back and into the undercut 30 engage the prosthesis 1.
- the locking pin 28 is pierced through coaxial with the central axis 4, so that a pin 25 is feasible, whereby a radial compression of the cam 31 is prevented.
- FIG. 5 shows a further embodiment of the prosthesis 1 according to the invention with its counterpart 6.
- the extensions 3 are mounted perpendicular to the central axis 4 and diametrically opposite, wherein the extensions 3 in this embodiment, parallel to the central axis 4 have a semi-circular cross-sectional area.
- the recess 5 penetrates the prosthesis 1 from the inner end 7 to the outer end 8 coaxial with the central axis 4.
- an internal thread 36 is attached with a very large pitch.
- the counterpart 6 in turn has a pin 16 adjoining the inner end 14, which has an external thread 33 complementary to the internal thread 36, so that the prosthesis 1 and the counterpart 6 can be detachably fastened to one another by means of this threaded connection.
- a first, sawtooth-like toothing 34 is attached to the counterpart 6, which is engageable with a complementary, second toothing 35 at the inner end 7 of the prosthesis 1 when assembling the prosthesis 1 with the counterpart 6, so a securing against unintentional release of prosthesis 1 and counterpart 6 is formed by the asymmetrical configuration of the toothings 34;
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- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Neurology (AREA)
- Surgery (AREA)
- Heart & Thoracic Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Prostheses (AREA)
- Surgical Instruments (AREA)
Abstract
Description
Claims
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CNB018235522A CN1271974C (zh) | 2001-08-20 | 2001-08-20 | 脊椎之间的假体 |
CZ2004212A CZ2004212A3 (cs) | 2001-08-20 | 2001-08-20 | Interspinální protéza, protikus a interspinální protéza s protikusem |
SK100-2004A SK1002004A3 (en) | 2001-08-20 | 2001-08-20 | Interspinal prosthesis |
PCT/CH2001/000509 WO2003015645A1 (de) | 2001-08-20 | 2001-08-20 | Interspinale prothese |
EP01960028A EP1418852A1 (de) | 2001-08-20 | 2001-08-20 | Interspinale prothese |
JP2003520408A JP4947879B2 (ja) | 2001-08-20 | 2001-08-20 | 棘突起間プロテーゼ |
CA002495119A CA2495119C (en) | 2001-08-20 | 2001-08-20 | Interspinal prosthesis |
TW091112068A TW534811B (en) | 2001-08-20 | 2002-06-05 | Interspinal prosthesis |
US10/784,046 US7442208B2 (en) | 2001-08-20 | 2004-02-20 | Interspinal prosthesis |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/CH2001/000509 WO2003015645A1 (de) | 2001-08-20 | 2001-08-20 | Interspinale prothese |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/784,046 Continuation US7442208B2 (en) | 2001-08-20 | 2004-02-20 | Interspinal prosthesis |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003015645A1 true WO2003015645A1 (de) | 2003-02-27 |
Family
ID=4358234
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CH2001/000509 WO2003015645A1 (de) | 2001-08-20 | 2001-08-20 | Interspinale prothese |
Country Status (9)
Country | Link |
---|---|
US (1) | US7442208B2 (de) |
EP (1) | EP1418852A1 (de) |
JP (1) | JP4947879B2 (de) |
CN (1) | CN1271974C (de) |
CA (1) | CA2495119C (de) |
CZ (1) | CZ2004212A3 (de) |
SK (1) | SK1002004A3 (de) |
TW (1) | TW534811B (de) |
WO (1) | WO2003015645A1 (de) |
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WO2005041792A1 (de) | 2003-10-30 | 2005-05-12 | Synthes Gmbh | Interspinales implantat |
FR2870106A1 (fr) * | 2004-05-11 | 2005-11-18 | Spine Next Sa | Implant intervertebral |
EP1625835A1 (de) * | 2003-05-16 | 2006-02-15 | Pentax Corporation | Interspinal-abstandshalter |
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US8267970B2 (en) | 2005-10-25 | 2012-09-18 | Depuy Spine, Inc. | Laminar hook spring |
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US7520887B2 (en) | 2003-02-19 | 2009-04-21 | Warsaw Orthopedic, Inc. | Interspinous device for impeding the movements of two successive vertebrae, and method for making a pad designed for it |
WO2004073533A1 (en) * | 2003-02-19 | 2004-09-02 | Sdgi Holdings Inc. | Interspinous device for impeding the movements of two successive vertebrae, and method for making a pad designed for it |
KR101066714B1 (ko) | 2003-02-19 | 2011-09-21 | 워쏘우 오르쏘페딕 인코포레이티드 | 인접한 두 척추골의 운동을 억제하는 가시돌기간 장치 및그러한 장치를 위해 설계된 패드를 제조하는 방법 |
FR2851154A1 (fr) * | 2003-02-19 | 2004-08-20 | Sdgi Holding Inc | Dispositif inter-epineux pour freiner les mouvements de deux vertebres successives, et procede de fabrication d'un coussin lui etant destine |
JP4976014B2 (ja) * | 2003-05-16 | 2012-07-18 | Hoya株式会社 | 棘間スペーサ |
EP1625835A4 (de) * | 2003-05-16 | 2012-05-30 | Hoya Corp | Interspinal-abstandshalter |
EP1625835A1 (de) * | 2003-05-16 | 2006-02-15 | Pentax Corporation | Interspinal-abstandshalter |
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US7588591B2 (en) | 2003-10-30 | 2009-09-15 | Synthesis Usa, Llc | Intervertebral implant |
EP1725191A4 (de) * | 2004-03-09 | 2009-10-21 | Depuy Spine Inc | Dynamischer abstandshalter für den hinteren fortsatz |
EP1725191A2 (de) * | 2004-03-09 | 2006-11-29 | DePuy Spine, Inc. | Dynamischer abstandshalter für den hinteren fortsatz |
US8465525B2 (en) | 2004-03-09 | 2013-06-18 | DePuy Synthes Products, LLC | Posterior process dynamic spacer |
JP2007536965A (ja) * | 2004-05-11 | 2007-12-20 | アボット スパイン | 椎間用インプラント |
WO2005120369A1 (fr) * | 2004-05-11 | 2005-12-22 | Abbott Spine | Implant intervertebral |
FR2870106A1 (fr) * | 2004-05-11 | 2005-11-18 | Spine Next Sa | Implant intervertebral |
US7771456B2 (en) | 2004-08-13 | 2010-08-10 | Synthes Usa, Llc | Interspinous implant |
US8267970B2 (en) | 2005-10-25 | 2012-09-18 | Depuy Spine, Inc. | Laminar hook spring |
US7585313B2 (en) * | 2005-12-22 | 2009-09-08 | Depuy Spine, Inc. | Rotatable interspinous spacer |
JP2009523572A (ja) * | 2006-01-18 | 2009-06-25 | ウォーソー・オーソペディック・インコーポレーテッド | 人工器官装置 |
WO2007084821A1 (en) | 2006-01-18 | 2007-07-26 | Warsaw Orthopedic, Inc. | Intervertebral prosthetic device for spinal stabilization and method of manufacturing same |
EP2016915A1 (de) * | 2007-07-20 | 2009-01-21 | Christian Röbling | Dornfortsatzimplantat |
Also Published As
Publication number | Publication date |
---|---|
SK1002004A3 (en) | 2004-08-03 |
CN1545398A (zh) | 2004-11-10 |
JP2004537389A (ja) | 2004-12-16 |
CA2495119C (en) | 2010-02-02 |
CZ2004212A3 (cs) | 2004-06-16 |
EP1418852A1 (de) | 2004-05-19 |
US20040199255A1 (en) | 2004-10-07 |
TW534811B (en) | 2003-06-01 |
CN1271974C (zh) | 2006-08-30 |
CA2495119A1 (en) | 2003-02-27 |
US7442208B2 (en) | 2008-10-28 |
JP4947879B2 (ja) | 2012-06-06 |
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