WO2009053540A1 - Vis compressive a tete filetee pour osteosynthese - Google Patents
Vis compressive a tete filetee pour osteosynthese Download PDFInfo
- Publication number
- WO2009053540A1 WO2009053540A1 PCT/FR2008/001037 FR2008001037W WO2009053540A1 WO 2009053540 A1 WO2009053540 A1 WO 2009053540A1 FR 2008001037 W FR2008001037 W FR 2008001037W WO 2009053540 A1 WO2009053540 A1 WO 2009053540A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- screw
- head
- osteosynthesis
- threaded
- distal end
- 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
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/8605—Heads, i.e. proximal ends projecting from bone
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
-
- 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
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
-
- 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
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/8625—Shanks, i.e. parts contacting bone tissue
- A61B17/863—Shanks, i.e. parts contacting bone tissue with thread interrupted or changing its form along shank, other than constant taper
-
- 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
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/864—Pins or screws or threaded wires; nuts therefor hollow, e.g. with socket or cannulated
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/03—Automatic limiting or abutting means, e.g. for safety
- A61B2090/037—Automatic limiting or abutting means, e.g. for safety with a frangible part, e.g. by reduced diameter
Definitions
- the invention relates to a compressive screw for approximating and holding two bone fragments.
- the screw comprises a head and a threaded rod.
- the head may be flat or conical.
- tightening is obtained when the head is in abutment and the screw has made several turns.
- the head can be conical.
- WO 03/072962 which comprises a threaded conical head followed immediately by a threaded cylindrical body. Between the conical head and the threaded body there is no smooth part. To obtain a closer effect, it is necessary that the fracture line is positioned exactly at the junction between the conical portion and the cylindrical portion which is almost impossible. Also the range of displacement of the two parts of bone for compression would be equal to the width of the pitch of the screw thread.
- the screw shaft must therefore be free of screw thread.
- the diameter of the screw at the level of this smooth middle part corresponds to the diameter of the drilling performed before placing the screw.
- the invention proposes to provide a solution.
- the invention relates to a compressive screw approximation screw comprising a threaded head, a threaded distal end and a smooth cylindrical middle portion connecting the threaded head and the threaded distal end, this screw being characterized in that that the head consists of two parts juxtaposed, a first conical portion whose diameter decreases progressing towards the distal end, this prolonging by a second cylindrical portion of constant radius R, the whole of the head having a screw thread or a succession of screw threads.
- FIG. 1 A screw according to the invention
- FIG 2 an axial section along A-A of FIG. 1
- FIG. 3 An axial section of a screw variant
- the screw 1 exerts a force tending to bring the two fragments together.
- This screw is particularly useful for surgery of the bones of the hand and foot but may be suitable for other applications.
- the screw 1 consists of an elongate body comprising at its end so-called proximal a head 2 with an impression 3 to engage a tool.
- the head 2 has a screw thread.
- the distal end 4 of the screw also has a thread 5 of screw but whose pitch is different to allow the approximation of the bone parts.
- Between the two threaded ends extends a smooth middle portion 6 whose diameter is substantially that of the diameter of the bore. The length of this middle portion is greater than the distance traveled by a complete rotation of the screw.
- the diameter of the threaded ends is greater than the diameter of the bore and therefore of the middle part.
- the head 2 consists of two juxtaposed portions 2A, 2B, a first conical portion 2A whose diameter decreases progressing towards the distal end 4, this prolonging by a second cylindrical portion 2B of constant radius R, the whole of the head having a screw thread or a succession of screw threads.
- the screw thread is either continuous at constant pitch or continuous but variable pitch. This variable step is obtained by juxtaposition of nets with different pitch that will form a net evolutionary step.
- This screw thread can possibly be interrupted.
- the average pitch of the thread presented by the head will be smaller than the average pitch of the net in the distal part.
- the body of the screw may have a channel 10 passing through said body along its longitudinal axis. It is opening at both ends.
- the screw may be carried by a tool and connected to this tool by a link 13 breakable.
- the second portion 2B of the screw head will mesh with the tapping performed beforehand by the passage of the distal end 4 which will center the screw head and thus avoid the bursting of the bone. This interaction of the second part with the tapped hole will not change the tapping when the screw is engaged.
- the angle X formed between the longitudinal axis 11 of the screw and the conical generatrix 12 of the conical portion of the head is less than 15 °. Preferably, it will be between 10 ° and 14 °.
- the causes of bursting of the bone during penetration of the head are also reduced.
- the thread length of the head is also increased.
Landscapes
- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Veterinary Medicine (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)
- Neurology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Pathology (AREA)
- Surgical Instruments (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1006563.9A GB2466599B (en) | 2007-10-25 | 2008-07-16 | Compression screw with compound threaded head for osteosynthesis |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0707515A FR2922749B1 (fr) | 2007-10-25 | 2007-10-25 | Vis a tete filetee pour ostheosynthese |
FR0707515 | 2007-10-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2009053540A1 true WO2009053540A1 (fr) | 2009-04-30 |
Family
ID=39432523
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2008/001037 WO2009053540A1 (fr) | 2007-10-25 | 2008-07-16 | Vis compressive a tete filetee pour osteosynthese |
Country Status (3)
Country | Link |
---|---|
FR (1) | FR2922749B1 (fr) |
GB (1) | GB2466599B (fr) |
WO (1) | WO2009053540A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107847249A (zh) * | 2015-05-11 | 2018-03-27 | 普罗维登斯医疗技术公司 | 骨螺钉和植入物递送装置 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011053141A1 (de) * | 2011-08-31 | 2013-02-28 | Normed Medizin-Technik Gmbh | Chirurgischer Mittelfuß-Kompressionsnagel |
FR3007961B1 (fr) * | 2013-07-02 | 2016-08-26 | Synchro Medical | Vis pour reparation d’os |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2760628A1 (fr) * | 1997-03-11 | 1998-09-18 | Biotech International | Vis a tete filetee pour l'osteosynthese de fragments d'os |
US6030162A (en) * | 1998-12-18 | 2000-02-29 | Acumed, Inc. | Axial tension screw |
US6306140B1 (en) * | 2001-01-17 | 2001-10-23 | Synthes (Usa) | Bone screw |
US6440136B1 (en) * | 2000-05-24 | 2002-08-27 | Medtronic Ps Medical, Inc. | Apparatus for attaching to bone |
WO2003072962A1 (fr) * | 2002-02-26 | 2003-09-04 | Degima Medizinprodukte Gmbh | Dispositif filete a resistance amelioree a la rupture causee par la torsion |
WO2004072496A1 (fr) * | 2003-02-12 | 2004-08-26 | Synthes Ag Chur | Vis a tournevis integre |
WO2005120368A2 (fr) * | 2004-06-07 | 2005-12-22 | Degima Gmbh | Vis munie d'une tete a couple ameliore |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2840799B1 (fr) * | 2002-06-17 | 2005-07-08 | Fixano | Vis d'osteosynthese |
DE202007005829U1 (de) * | 2007-04-20 | 2007-07-12 | Zrinski Ag | Kompressionsschraube mit Drahtelement |
-
2007
- 2007-10-25 FR FR0707515A patent/FR2922749B1/fr active Active
-
2008
- 2008-07-16 WO PCT/FR2008/001037 patent/WO2009053540A1/fr active Application Filing
- 2008-07-16 GB GB1006563.9A patent/GB2466599B/en active Active
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2760628A1 (fr) * | 1997-03-11 | 1998-09-18 | Biotech International | Vis a tete filetee pour l'osteosynthese de fragments d'os |
US6030162A (en) * | 1998-12-18 | 2000-02-29 | Acumed, Inc. | Axial tension screw |
US6440136B1 (en) * | 2000-05-24 | 2002-08-27 | Medtronic Ps Medical, Inc. | Apparatus for attaching to bone |
US6306140B1 (en) * | 2001-01-17 | 2001-10-23 | Synthes (Usa) | Bone screw |
WO2003072962A1 (fr) * | 2002-02-26 | 2003-09-04 | Degima Medizinprodukte Gmbh | Dispositif filete a resistance amelioree a la rupture causee par la torsion |
WO2004072496A1 (fr) * | 2003-02-12 | 2004-08-26 | Synthes Ag Chur | Vis a tournevis integre |
WO2005120368A2 (fr) * | 2004-06-07 | 2005-12-22 | Degima Gmbh | Vis munie d'une tete a couple ameliore |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107847249A (zh) * | 2015-05-11 | 2018-03-27 | 普罗维登斯医疗技术公司 | 骨螺钉和植入物递送装置 |
Also Published As
Publication number | Publication date |
---|---|
GB201006563D0 (en) | 2010-06-02 |
FR2922749A1 (fr) | 2009-05-01 |
GB2466599B (en) | 2012-07-18 |
GB2466599A (en) | 2010-06-30 |
FR2922749B1 (fr) | 2010-10-08 |
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