WO2001039676A1 - Fixateur externe dans le domaine de l'osteosynthese rachidienne et l'orthopedie generale - Google Patents
Fixateur externe dans le domaine de l'osteosynthese rachidienne et l'orthopedie generale Download PDFInfo
- Publication number
- WO2001039676A1 WO2001039676A1 PCT/FR2000/003364 FR0003364W WO0139676A1 WO 2001039676 A1 WO2001039676 A1 WO 2001039676A1 FR 0003364 W FR0003364 W FR 0003364W WO 0139676 A1 WO0139676 A1 WO 0139676A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- bone
- screw
- nut
- thread
- fixation device
- 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
- A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
- A61B17/8033—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates having indirect contact with screw heads, or having contact with screw heads maintained with the aid of additional components, e.g. nuts, wedges or head covers
- A61B17/8047—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates having indirect contact with screw heads, or having contact with screw heads maintained with the aid of additional components, e.g. nuts, wedges or head covers wherein the additional element surrounds the screw head in the plate hole
-
- 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
- A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
- A61B17/7002—Longitudinal elements, e.g. rods
- A61B17/7004—Longitudinal elements, e.g. rods with a cross-section which varies along its length
- A61B17/7007—Parts of the longitudinal elements, e.g. their ends, being specially adapted to fit around the screw or hook heads
Definitions
- the present invention has for objective an application in the field of 1 spinal osteosynthesis, but also in the field of 1 general orthopedics and more particularly for an application of external fixator.
- European patent application number EP 888 754 which describes the invention of a bone screw extended by a metric thread.
- This invention allows, in the case of spinal fixation by pedicle screw, a bone fixation by means of the bone net and a fixation to a connecting element (rod or plate) by means of the metric thread part and a appropriate fixing connector.
- the bone screw and the metric thread are separated by a bulge allowing to receive the drive system (Hexagon) and also to act as a stop for the system of connection to the rod.
- the drive system Hexagon
- WO 94/10928 concerning a bone screw extended by a metric thread having the same functions of bone fixation and connection to a connecting element. Unlike the previous invention, it does not have an intermediate bulge.
- the screw is driven in rotation by a hexagon at the upper end of the metric thread, and the stop serving the connection system to the rod is made automatically by the effect of the differences in diameter of the bone screw and of the isometric net.
- the object of the invention is to provide a bone fixation device making it possible to offer, with a single product or a reduced range, and not with a complete range of product, the possibility for a surgeon to instrument most of his patients. To this end, the invention relates in its most general sense to a bone fixation device according to claim 1.
- the bone fixation device consists of a headless screw with a bone thread, characterized in that the thread extends over the entire length of the screw, and in that it further comprises a nut, the internal thread corresponds to the bone thread of the rod, said nut having an external thread for receiving a tightening nut intended to fix a connection system for a connecting element.
- the upper end of the screw is hexagonal in shape to allow the screw to be driven in rotation during penetration into the bone, and the rotation to be blocked during final tightening of the mechanism to avoid greater penetration of the screw into the bone.
- the nut has a shoulder on its lower part for abutment of said plate.
- the nut has above the external thread a hexagonal shape to allow its height adjustment along the screw.
- FIG. 1 shows a bone screw with single thread
- Figure 2 shows a plate connection assembly.
- the present invention consists of a headless screw (1) with a bone thread (2) over its entire length.
- This bone type thread (2) has two functions: that of anchoring in the bone, but also that of receiving a connection system for a connecting element.
- a rotary drive system (5) On the upper end of the screw (1), a rotary drive system (5) is provided.
- This system for example a hexagon, has two functions: That of allowing the screw (1) to be driven in rotation during penetration into the bone thereof, but also a role of blocking in rotation during final tightening of the mechanism to avoid greater penetration of the screw (1) into the bone.
- a nut (6) whose internal thread (7) corresponds to the bone thread (2) of the screw (1) is targeted on the non-buried part of the bone of the screw, allowing a longitudinal stop along the screw ( 1) for the connecting element called plate (4).
- This nut has a shoulder (9) on its lower part for abutment of said plate (4).
- An external thread (10) is provided on its upper part to receive a tightening nut (11).
- This tightening nut (11) has an internal thread (12), and a drive system (13) allowing the final tightening, for example, an external hexagon.
- Said plate (4) is then trapped between the shoulder (9) of the nut (6) and the tightening nut (11), which allows the effect of a tightening torque to block the different degrees plate freedom.
- a drive system (14) for example an external hexagon is also provided on the nut (6) above the internal thread (10) so as to allow its height adjustment along the screw (1).
- This system has a smaller footprint than the clamping nut (11) so as to allow manipulation thereof independently and without discomfort. This makes it possible to still be able to adjust the position of the connection in height after the positioning of the plate (4) and of the clamping nut (11), and before the final tightening of the connection.
- the plate (4) is said to be conventional, of rectangular shape with longitudinal slots (16) allowing the passage of the nut (6) for resting its lower surface (17) on the shoulder (9) of the 'nut (6), and a pressurization of its upper surface (18) via 1 clamping nut (11).
- This preferred implementation allows the plate (4) to be fixed in a position perpendicular to the screw (1).
- the invention also protects by a set of spokes on the plate (4), nut (6), and clamping nut (11), a blocking of the plate (4) on the screw (1) in any position.
Landscapes
- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Neurology (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)
- Surgical Instruments (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU21822/01A AU2182201A (en) | 1999-12-03 | 2000-12-01 | External fixator for spinal osteosynthesis and general orthopaedics |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR99/15294 | 1999-12-03 | ||
FR9915294A FR2801777B1 (fr) | 1999-12-03 | 1999-12-03 | Fixateur externe dans le domaine de l'osteosynthese rachidienne et l'orthopedie generale |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001039676A1 true WO2001039676A1 (fr) | 2001-06-07 |
Family
ID=9552886
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2000/003364 WO2001039676A1 (fr) | 1999-12-03 | 2000-12-01 | Fixateur externe dans le domaine de l'osteosynthese rachidienne et l'orthopedie generale |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU2182201A (fr) |
FR (1) | FR2801777B1 (fr) |
WO (1) | WO2001039676A1 (fr) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE9215561U1 (de) * | 1992-11-16 | 1993-01-14 | Weber, Gerhard, 7238 Oberndorf | Fixateur Interne |
US5254118A (en) * | 1991-12-04 | 1993-10-19 | Srdjian Mirkovic | Three dimensional spine fixation system |
US5290288A (en) * | 1990-02-08 | 1994-03-01 | Vignaud Jean Louis | Multi-function device for the osteosynthesis of rachis |
WO1994010928A1 (fr) | 1992-11-13 | 1994-05-26 | Sofamor, S.N.C. | Vis pediculaire et appareillage de correction de la colonne par l'approche posterieure |
EP0888754A1 (fr) | 1997-07-03 | 1999-01-07 | Acromed Corporation | Elément de fixation pour l'ostéosynthèse |
US5947967A (en) * | 1997-10-22 | 1999-09-07 | Sdgt Holdings, Inc. | Variable angle connector |
-
1999
- 1999-12-03 FR FR9915294A patent/FR2801777B1/fr not_active Expired - Fee Related
-
2000
- 2000-12-01 WO PCT/FR2000/003364 patent/WO2001039676A1/fr active Application Filing
- 2000-12-01 AU AU21822/01A patent/AU2182201A/en not_active Abandoned
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5290288A (en) * | 1990-02-08 | 1994-03-01 | Vignaud Jean Louis | Multi-function device for the osteosynthesis of rachis |
US5254118A (en) * | 1991-12-04 | 1993-10-19 | Srdjian Mirkovic | Three dimensional spine fixation system |
WO1994010928A1 (fr) | 1992-11-13 | 1994-05-26 | Sofamor, S.N.C. | Vis pediculaire et appareillage de correction de la colonne par l'approche posterieure |
DE9215561U1 (de) * | 1992-11-16 | 1993-01-14 | Weber, Gerhard, 7238 Oberndorf | Fixateur Interne |
EP0888754A1 (fr) | 1997-07-03 | 1999-01-07 | Acromed Corporation | Elément de fixation pour l'ostéosynthèse |
US5947967A (en) * | 1997-10-22 | 1999-09-07 | Sdgt Holdings, Inc. | Variable angle connector |
Also Published As
Publication number | Publication date |
---|---|
FR2801777B1 (fr) | 2002-02-08 |
FR2801777A1 (fr) | 2001-06-08 |
AU2182201A (en) | 2001-06-12 |
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