FR2922749A1 - THREADED HEAD SCREW FOR OSTHEOSYNTHESIS - Google Patents

THREADED HEAD SCREW FOR OSTHEOSYNTHESIS Download PDF

Info

Publication number
FR2922749A1
FR2922749A1 FR0707515A FR0707515A FR2922749A1 FR 2922749 A1 FR2922749 A1 FR 2922749A1 FR 0707515 A FR0707515 A FR 0707515A FR 0707515 A FR0707515 A FR 0707515A FR 2922749 A1 FR2922749 A1 FR 2922749A1
Authority
FR
France
Prior art keywords
screw
head
threaded
distal end
osteosynthesis
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.)
Granted
Application number
FR0707515A
Other languages
French (fr)
Other versions
FR2922749B1 (en
Inventor
Guillaume Derouet
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.)
DLP SARL
Original Assignee
DLP SARL
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 DLP SARL filed Critical DLP SARL
Priority to FR0707515A priority Critical patent/FR2922749B1/en
Priority to GB1006563.9A priority patent/GB2466599B/en
Priority to PCT/FR2008/001037 priority patent/WO2009053540A1/en
Publication of FR2922749A1 publication Critical patent/FR2922749A1/en
Application granted granted Critical
Publication of FR2922749B1 publication Critical patent/FR2922749B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • A61B17/8605—Heads, i.e. proximal ends projecting from bone
    • 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

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

L'invention a pour objet une vis d'ostéosynthèse comprenant une tête (2) filetée, une extrémité distale (4) filetée et un corps lisse (6) cylindrique reliant la tête filetée et l'extrémité distale filetée cette vis étant caractérisée en ce que la tête est constituée de deux parties (2A, 2B) juxtaposées ,une première partie (2A) conique dont le diamètre décroit en progressant vers l'extrémité distale, ce prolongeant par une seconde partie (2B) cylindrique de rayon R constant , l'ensemble de la tête présentant un filet de vis ou une succession de filet de vis.The subject of the invention is an osteosynthesis screw comprising a threaded head (2), a threaded distal end (4) and a cylindrical smooth body (6) connecting the threaded head and the threaded distal end, this screw being characterized in that that the head consists of two parts (2A, 2B) juxtaposed, a first conical portion (2A) whose diameter decreases while progressing towards the distal end, this prolonging by a second portion (2B) cylindrical constant radius R, l assembly of the head having a screw thread or a succession of screw threads.

Description

VIS A TETE FILETEE POUR OSTHEOSYNTHESE. L'invention se rapporte à une vis pour maintenir deux fragments d'os. Pour maintenir provisoirement deux fragments d'os issus d'une fracture ou d'une ostéotomie le temps de l'ostéogénèse osseuse, il est connu de maintenir les deux 5 fragments au moyen d'une vis. Classiquement la vis comprend une tête et une tige filetée. La tête peut être à appui plan ou conique. Pour ce type de vis, le serrage s'obtient lorsque la tête est en butée et que la vis a effectuée plusieurs tours. Le chirurgien doit faire attention au couple de serrage sous peine d'endommager l'os. 10 On connait des vis perfectionnées présentant au niveau de la tête un filetage avec un pas N constant et en partie distale un autre filetage avec un pas P constant, le pas P étant différent du pas N. Lorsque le pas N est inférieur au pas P, il se produit un effet de compression. Là également, la tête peut être conique. 15 Entre la tête de vis et l'extrémité distale, la tige de vis peut être dépourvue de filet de vis. Le diamètre de la vis au niveau de cette partie médiane correspond au diamètre du perçage effectué avant mise en place de la vis. Lorsque la tête est conique, on déplore parfois un éclatement de la corticale lorsque la tête de vis vient au contact de la corticale. Cela résulte d'un écrasement du filet du 20 taraudage réalisé par le passage de l'extrémité distale et la nécessité de fDrer une cavité lors du vissage pour s'adapter à la forme conique. Cela pose donc une difficulté. L'invention se propose d'apporter une solution. A cet effet l'invention se rapporte à une vis d'ostéosynthèse comprenant une tête filetée, une extrémité distale filetée et un corps lisse cylindrique reliant la tête filetée et 25 l'extrémité distale filetée, cette vis étant caractérisée en ce que la tête est constituée de deux parties juxtaposée, une première partie conique dont le diamètre décroit en progressant vers l'extrémité distale, ce prolongeant par une seconde partie cylindrique de rayon R constant, l'ensemble de la tête présentant un filet de vis ou une succession de filet de vis. 30 L'invention sera bien comprise à l'aide de la description ci après faite à titre d'exemple non limitatif en regard du dessin qui représente schématiquement : FIG 1 : Une vis selon l'invention SCREW WITH THREADED HEAD FOR OSTHEOSYNTHESIS. The invention relates to a screw for holding two bone fragments. To maintain temporarily two bone fragments from a fracture or osteotomy the time of bone osteogenesis, it is known to maintain both fragments by means of a screw. Conventionally the screw comprises a head and a threaded rod. The head may be flat or conical. For this type of screw, tightening is obtained when the head is in abutment and the screw has made several turns. The surgeon must pay attention to the tightening torque as this may damage the bone. There are known improved screws having at the head a thread with a constant pitch N and in the distal portion another thread with a constant pitch P, the pitch P being different from the pitch N. When the pitch N is less than the pitch P there is a compression effect. There too, the head can be conical. Between the screw head and the distal end, the screw shaft may be devoid of screw thread. The diameter of the screw at this median portion corresponds to the diameter of the drilling performed before installation of the screw. When the head is conical, it sometimes laments a burst of cortical when the screw head comes into contact with the cortex. This results from a crushing of the thread of the tapping made by the passage of the distal end and the need to fDrer a cavity during screwing to fit the conical shape. This poses a problem. The invention proposes to provide a solution. To this end, the invention relates to an osteosynthesis screw comprising a threaded head, a threaded distal end and a cylindrical smooth body connecting the threaded head and the threaded distal end, this screw being characterized in that the head is consisting of two parts juxtaposed, a first conical portion whose diameter decreases while 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 threads quote. The invention will be better understood from the following description given by way of nonlimiting example with reference to the drawing which shows schematically: FIG. 1: A screw according to the invention

FIG 2 : une coupe axiale selon A-A de la figure 1 FIG 3 : Une coupe axiale d'une variante de vis En se reportant au dessin, on voit que pour maintenir deux fragments d'os A,B en appui l'un contre l'autre, on fait appel à une vis 1 d'ostéosynthèse. FIG. 2: an axial section along AA of FIG. 1 FIG. 3: An axial section of a variant of a screw Referring to the drawing, it can be seen that to hold two bone fragments A, B resting against one another other, it uses an osteosynthesis screw 1.

Avant la mise en place de cette vis, un perçage est effectué. Ce perçage traverse en totalité un des fragments et pénètre ensuite dans l'autre fragment. La vis 1 exerce une force tendant à rapprocher les deux fragments. Cette vis est particulièrement utile pour la chirurgie des os de la main et du pied mais peut convenir à d'autres applications. Before the establishment of this screw, a drilling is performed. This piercing completely crosses one of the fragments and then enters the other fragment. 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.

La vis 1 est constituée d'un corps longiligne comprenant à son extrémité dite proximale une tête 2 avec une empreinte 3 pour y engager un outil. La tête 2 présente un filet de vis.L'extrémité distale 4 de la vis présente également un filet 5 de vis. Entre les deux extrémités filetées s'étend une partie 6 lisse dont le diamètre est sensiblement celui du diamètre clu perçage. On comprend bien que le diamètre des extrémités filetées est supérieur au diamètre du perçage. Selon l'invention, la tête 2 est constituée de deux parties 2A, 2B juxtaposées , une première partie 2A conique dont le diamètre décroit en progressant vers l'extrémité distale4 , ce prolongeant par une seconde partie 2B cylindrique de rayon R constant , l'ensemble de la tête présentant un filet de vis ou une succession de filet de vis. Le filet de vis est soit continu à pas constant soit continu mais à pas variable. Ce pas variable est obtenu par juxtaposition de filet à pas différent. Ce filet peut éventuellement être interrompu. Les pas de vis seront, dans un mode de réalisation, différents. Pour exercer un effort compressif, le pas moyen du filet présenté par la tête sera plus 25 petit que le pas moyen du filet en partie distale. Le corps de la vis pourra présenter un canal 10 traversant le dit corps selon son axe longitudinal. La vis pourra être portée par un outil et relié à cet outil par une liaison 11 sécable. On comprend très vite l'avantage de cette partie 2B cylindrique filetée précédent la 30 partie conique. 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 screw thread 5. Between the two threaded ends extends a smooth portion 6 whose diameter is substantially that of the diameter of the drilling. It is well understood that the diameter of the threaded ends is greater than the diameter of the bore. According to the invention, the head 2 consists of two juxtaposed portions 2A, 2B, a first conical portion 2A whose diameter decreases progressing towards the distal end4, this prolonging by a second cylindrical portion 2B of constant radius R, head assembly 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 net with different pitch. This net can possibly be interrupted. The threads will, in one embodiment, be different. To exert a compressive force, the average pitch of the thread presented by the head will be smaller than the average pitch of the net in the distal portion. The body of the screw may have a channel 10 passing through said body along its longitudinal axis. The screw may be carried by a tool and connected to this tool by a link 11 breakable. It is easy to understand the advantage of this threaded cylindrical portion 2B preceding the conical portion.

En effet, lors du serrage, lorsque la tête de vis va atteindre la corticale du premier fragment osseux, la deuxième partie 2B de la tête de vis va engrener avec le taraudage effectué préalablement par le passage de l'extrémité 4 distale ce qui va centrer la tête de vis et donc éviter l'éclatement de l'os. Cette interaction de la seconde partie avec le perçage taraudé ne va pas modifier le taraudage lorsque la vis est engagée. Du fait de la continuité entre la première 2A et seconde partie 2B de la tête, il y a une progression constante du filet de vis dans le taraudage ce qui limite les risques d'éclatement de l'os. Indeed, during tightening, when the screw head will reach the cortex of the first bone fragment, 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. Due to the continuity between the first 2A and second part 2B of the head, there is a constant progression of the screw thread in the tapping which limits the risk of bursting of the bone.

Claims (6)

REVENDICATIONS 1. Vis d'ostéosynthèse comprenant une tête (2) filetée, une extrémité distale (4) filetée et un corps lisse (6) cylindrique reliant la tête filetée et l'extrémité distale filetée cette vis étant caractérisée en ce que la tête est constituée de deux parties (2A, 2B) juxtaposées , une première partie (2A) conique dont le diamètre décroit en progressant vers l'extrémité distale, ce prolongeant par une seconde partie (2B) cylindrique de rayon R constant , l'ensemble de la tête présentant un filet de vis ou une succession de filet de vis. 1. Osteosynthesis screw comprising a threaded head (2), a threaded distal end (4) and a cylindrical smooth body (6) connecting the threaded head and the threaded distal end, this screw being characterized in that the head is constituted two parts (2A, 2B) juxtaposed, a first portion (2A) conical whose diameter decreases progressing towards the distal end, this prolonging by a second portion (2B) cylindrical constant radius R, the entire head having a screw thread or a succession of screw threads. 2. Vis d'ostéosynthèse selon la revendication 1 caractérisée en ce que le filet de vis de la tête est continu. 2. Osteosynthesis screw according to claim 1 characterized in that the screw thread of the head is continuous. 3. Vis d"ostéosynthèse selon la revendication 1 caractérisée en ce que le filet de 15 vis de la tête est interrompu. 3. Osteosynthesis screw according to claim 1 characterized in that the screw thread of the head is interrupted. 4. Vis d'ostéosynthèse selon l'une quelconque des revendications précédentes caractérisée en ce que la vis présente un canal 10traversant le dit corps selon son axe longitudinal. 4. osteosynthesis screw according to any one of the preceding claims characterized in that the screw has a channel 10traversant said body along its longitudinal axis. 5. Vis d'ostéosynthèse selon l'une quelconque des revendications précédentes 20 caractérisée en ce que la tête de vis est relié à un outil par une liaison 11 sécable. 5. Osteosynthesis screw according to any one of the preceding claims, characterized in that the screw head is connected to a tool by a breakable link 11. 6. Vis d'ostéosynthèse selon l'une quelconque des revendications précédentes caractérisée en ce que le pas vis de l'extrémité distale est différent: du pas de vis de la tête. 6. Osteosynthesis screw according to any one of the preceding claims, characterized in that the screw thread of the distal end is different from the screw thread of the head.
FR0707515A 2007-10-25 2007-10-25 THREADED HEAD SCREW FOR OSTHEOSYNTHESIS Active FR2922749B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR0707515A FR2922749B1 (en) 2007-10-25 2007-10-25 THREADED HEAD SCREW FOR OSTHEOSYNTHESIS
GB1006563.9A GB2466599B (en) 2007-10-25 2008-07-16 Compression screw with compound threaded head for osteosynthesis
PCT/FR2008/001037 WO2009053540A1 (en) 2007-10-25 2008-07-16 Compression screw with threaded head for osteosynthesis

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0707515A FR2922749B1 (en) 2007-10-25 2007-10-25 THREADED HEAD SCREW FOR OSTHEOSYNTHESIS

Publications (2)

Publication Number Publication Date
FR2922749A1 true FR2922749A1 (en) 2009-05-01
FR2922749B1 FR2922749B1 (en) 2010-10-08

Family

ID=39432523

Family Applications (1)

Application Number Title Priority Date Filing Date
FR0707515A Active FR2922749B1 (en) 2007-10-25 2007-10-25 THREADED HEAD SCREW FOR OSTHEOSYNTHESIS

Country Status (3)

Country Link
FR (1) FR2922749B1 (en)
GB (1) GB2466599B (en)
WO (1) WO2009053540A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011053141A1 (en) * 2011-08-31 2013-02-28 Normed Medizin-Technik Gmbh Surgical metatarsal compression nail
FR3007961A1 (en) * 2013-07-02 2015-01-09 Synchro Medical SCREWS FOR BONE REPAIR

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107847249A (en) * 2015-05-11 2018-03-27 普罗维登斯医疗技术公司 Bone screws and implant delivery apparatus

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2760628A1 (en) * 1997-03-11 1998-09-18 Biotech International SCREW WITH THREADED HEAD FOR OSTEOSYNTHESIS OF BONE FRAGMENTS
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 (en) * 2002-02-26 2003-09-04 Degima Medizinprodukte Gmbh Threaded device with improved resistance against torsion-caused breakage
WO2004072496A1 (en) * 2003-02-12 2004-08-26 Synthes Ag Chur Screw comprising an integrated screwdriver
WO2005120368A2 (en) * 2004-06-07 2005-12-22 Degima Gmbh Fastener having torque optimized head

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6030162A (en) * 1998-12-18 2000-02-29 Acumed, Inc. Axial tension screw
FR2840799B1 (en) * 2002-06-17 2005-07-08 Fixano OSTEOSYNTHESIS SCREW
DE202007005829U1 (en) * 2007-04-20 2007-07-12 Zrinski Ag Compression screw with wire element e.g. for mechanical connection of bone fractures, has longitudinal extending aligned shank which is divided into two parts, having thread

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2760628A1 (en) * 1997-03-11 1998-09-18 Biotech International SCREW WITH THREADED HEAD FOR OSTEOSYNTHESIS OF BONE FRAGMENTS
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 (en) * 2002-02-26 2003-09-04 Degima Medizinprodukte Gmbh Threaded device with improved resistance against torsion-caused breakage
WO2004072496A1 (en) * 2003-02-12 2004-08-26 Synthes Ag Chur Screw comprising an integrated screwdriver
WO2005120368A2 (en) * 2004-06-07 2005-12-22 Degima Gmbh Fastener having torque optimized head

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011053141A1 (en) * 2011-08-31 2013-02-28 Normed Medizin-Technik Gmbh Surgical metatarsal compression nail
EP2564799A1 (en) 2011-08-31 2013-03-06 NORMED Medizin-Technik GmbH Surgical metatarsal compression nail
FR3007961A1 (en) * 2013-07-02 2015-01-09 Synchro Medical SCREWS FOR BONE REPAIR

Also Published As

Publication number Publication date
GB201006563D0 (en) 2010-06-02
GB2466599B (en) 2012-07-18
WO2009053540A1 (en) 2009-04-30
FR2922749B1 (en) 2010-10-08
GB2466599A (en) 2010-06-30

Similar Documents

Publication Publication Date Title
EP0599752B1 (en) Osteosynthesis device for trochanteric or intertrochanteric fractures
EP2393441B1 (en) Screw for osteosynthesis and arthrodesis
EP1378205B1 (en) Compression screw for osteosynthesis
KR101718464B1 (en) Removing apparatus of abutment for dental implant
FR2808182A1 (en) Surgical compression screw for joining two bones together has two threaded portions with different pitches, diameters and angles
FR2760628A1 (en) SCREW WITH THREADED HEAD FOR OSTEOSYNTHESIS OF BONE FRAGMENTS
WO2012131246A1 (en) Plate for osteosynthesis
FR2788960A1 (en) Threaded pin for connecting bone fragments has two threaded sections of different diameters with smooth section between
FR2922749A1 (en) THREADED HEAD SCREW FOR OSTHEOSYNTHESIS
EP3376982B1 (en) Double-threaded bone screw
WO2004107999A2 (en) Screw comprising two threads with different pitches, used to join two bone segments
EP3206607B1 (en) Intramedullary nail
FR2735010A1 (en) RING OF OSTEOSYNTHESIS USABLE IN COMBINATION WITH A SPINDLE OR A SCREW, AND ANCILLARY FOR ITS COMPRESSION.
FR2928824A1 (en) TRANS-CORTICAL ANCHOR DEVICE
EP2996590B1 (en) Revision assembly for an item of vertebral osteosynthesis equipment
FR2787989A1 (en) SELF-COMPRESSIVE OSTEOSYNTHESIS SCREW FOR SMALL BONE SURGERY
EP1361827B1 (en) Fixing screw
FR2932975A1 (en) Percutaneous osteosynthesis screw for e.g. hand bone, during orthopedic surgery, has screw body comprising grooves extending on external surface of body and forming knife-edged ridge with filet of external thread to perform tapping in bone
FR3021206B1 (en) OSTEOSYNTHESIS SCREW INTENDED FOR THE SOLIDARIZATION OF BONE FRAGMENTS
WO2013175099A1 (en) Self-compressing osteosynthesis screw
EP3320871A1 (en) Equipment for the treatment of a fracture with bracing, for example a fracture of the olecranon or the patella
FR2932375A1 (en) Bones distracting device for reducing spondylolisthesis between vertebral bodies of patient, has application unit applying opposed forces on plate and part of screw shaft, where forces are defined on straight line parallel to orifice's axis
FR2929828A1 (en) Osteosynthesis device e.g. bone screw, for reducing fracture of femoral neck in e.g. hip or knee, has body with two internal proximal threadings and external distal threadings, and nut for tightening and compressing fracture of femoral neck
FR2876897A1 (en) IMPROVEMENT TO IMPLANTABLE SURGICAL SCREWS
EP3416572A1 (en) Protective cap comprising flat sections, intended for an osteosynthesis pin, and including an element for securing the cap

Legal Events

Date Code Title Description
CL Concession to grant licences
PLFP Fee payment

Year of fee payment: 9

PLFP Fee payment

Year of fee payment: 10

PLFP Fee payment

Year of fee payment: 11

PLFP Fee payment

Year of fee payment: 12

PLFP Fee payment

Year of fee payment: 13

PLFP Fee payment

Year of fee payment: 14

PLFP Fee payment

Year of fee payment: 15

PLFP Fee payment

Year of fee payment: 16

PLFP Fee payment

Year of fee payment: 17