EP3457962A1 - Orthopaedic screwdriver with automatic locking - Google Patents
Orthopaedic screwdriver with automatic lockingInfo
- Publication number
- EP3457962A1 EP3457962A1 EP17722052.2A EP17722052A EP3457962A1 EP 3457962 A1 EP3457962 A1 EP 3457962A1 EP 17722052 A EP17722052 A EP 17722052A EP 3457962 A1 EP3457962 A1 EP 3457962A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- guide tube
- locking
- self
- screwdriver according
- rotation
- 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- Withdrawn
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
- A61B17/7074—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling
- A61B17/7076—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling for driving, positioning or assembling spinal clamps or bone anchors specially adapted for spinal fixation
- A61B17/7082—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling for driving, positioning or assembling spinal clamps or bone anchors specially adapted for spinal fixation for driving, i.e. rotating, screws or screw parts specially adapted for spinal fixation, e.g. for driving polyaxial or tulip-headed screws
-
- 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
- A61B17/7074—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling
- A61B17/7076—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling for driving, positioning or assembling spinal clamps or bone anchors specially adapted for spinal fixation
- A61B17/7077—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling for driving, positioning or assembling spinal clamps or bone anchors specially adapted for spinal fixation for moving bone anchors attached to vertebrae, thereby displacing the vertebrae
- A61B17/708—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling for driving, positioning or assembling spinal clamps or bone anchors specially adapted for spinal fixation for moving bone anchors attached to vertebrae, thereby displacing the vertebrae with tubular extensions coaxially mounted on the bone anchors
Definitions
- the present invention relates to an automatic locking screwdriver for the positioning, clamping and / or loosening of orthopedic implants anchored in the tissues of an individual's bone body.
- European patent EP2962651 discloses removable screwdrivers for anchoring bone screws for orthopedic implant retention against a bone body and more particularly for spinal implant connector fixation.
- the removable screwdriver has a coupling portion for driving a rod whose distal end portion cooperates with the head of the pedicle screw while said coupling portion is screwed inside the form of connector tulip for spinal implant.
- This type of screwdriver must on the one hand hold the connector and on the other hand allow the rotation of the anchoring screw for fixing in the bone tissue.
- the screwdriver according to the present invention aims to solve this problem by providing a locking system for temporarily locking said screwdriver on the implant the time of anchoring the fixation screw in the bone tissue.
- the self-locking screwdriver comprising a guide tube inside which is guided and rotated a clamping rod whose one end is provided with a recess for driving in rotation and the tightening an anchoring screw for immobilizing an orthopedic implant against an osseous body of an individual, said screwdriver comprising firstly between the guide tube and the clamping rod a blocking system cooperating with said guide tube to prevent loosening of the latter of the orthopedic implant when tightening the anchor screw and secondly on the outer periphery of the guide tube a gripping wheel ensuring the locking and / or the unlocking the locking system and driving in rotation of said guide tube.
- the self-locking screwdriver according to the present invention comprises a locking system which consists of a connecting rod comprising on its periphery a series of teeth cooperating as a function of the direction of rotation of said rod with a retractable stop arranged in the tube of guide.
- the self-locking screwdriver according to the present invention comprises a retractable stop whose C-shaped profile has inside its opening an inclined profile.
- the self-locking screwdriver according to the present invention comprises a retractable stop in which is arranged a flexible blade provided on its inner face directed inside said guide tube of a tooth.
- the self-locking screwdriver comprises a retractable stop whose tooth has an arcuate profile which is arranged in the extension of the circular profile of the internal bore of the guide tube.
- the self-locking screwdriver according to the present invention comprises a connecting rod comprising, in the extension of the teeth, a connecting device consisting on the one hand of a blind internal bore and on the other hand an arrangement of elastically deformable lamellae allowing receive and lock in translation and in rotation the clamping rod.
- the self-locking screwdriver according to the present invention comprises opposite the retractable stopper of the guide tube a torque transmission stud.
- the self-locking screwdriver comprises a gripping wheel having a first space within which the retractable stop cooperates and a second space disposed opposite the first and inside which is housed the transmission pad of couple.
- the self-locking screwdriver comprises inside the first space of the gripping wheel a cam whose outer profile comes into contact with the inclined one of the opening of the retractable abutment.
- the self-locking screwdriver according to the present invention comprises a second space, the internal profile of which delimits, in the vicinity of the external bore of the guide tube, a first abutment known as a "screw abutment” and, on the opposite side, a second abutment referred to as “ unscrewing stop "on which bears the torque transmission pad according to the direction of rotation of the gripping wheel around the guide tube.
- a first abutment known as a "screw abutment”
- unscrewing stop on which bears the torque transmission pad according to the direction of rotation of the gripping wheel around the guide tube.
- Figure 3 is a sectional view showing the self-locking screwdriver according to the invention.
- Figures 4 to 8 are views illustrating the guide tube of the self-locking screwdriver according to the invention.
- Figures? and 8 are views showing the connecting rod locking means of the self-locking screwdriver according to the invention.
- FIGS 9 and 10 are views showing the retractable stop of the locking means of the self-locking screwdriver according to the invention.
- FIGS. 11 and 12 are sectional views illustrating the locking and unlocking positions of locking means of the self-locking screwdriver according to the invention.
- FIGS. 1 to 3 show an automatic locking screwdriver 1 according to the present invention comprising a guide tube 3 and a clamping rod 4 which cooperate respectively with a U-shaped connector 2a and an anchoring screw 6 of FIG. an orthopedic implant 2, the anchoring screw 6 is provided to pass through the connector 2a so that its head 6a with a spherical profile bears against the bottom of the U-shaped profile of said connector 2a to ensure angular and positioning freedom to said connector by relative to the axis of implantation of said anchoring screw 6 in the body of a vertebra Ve.
- the screwdriver 1 Due to the freedom of movement between the connector 2a and the anchoring screw 6, the screwdriver 1 must come to rest in said connector while allowing the rotation drive of the anchoring screw 6.
- the self-locking screwdriver 1 comprises a guide tube 3 provided at one of its ends with a threaded external profile 3a cooperating with the internal threaded zone 2b of the connector 2a so as to immobilize said screwdriver 1 to the inside said connector 2a of the orthopedic implant 2.
- the guide tube 3 comprises on its outer periphery a retractable stop 11 and in a diametrically opposite direction a transmission pad 12.
- the retractable stop 11 has a C-shaped profile whose opening 11a is turned towards the threaded profile 3a.
- the retractable stop 1 1 is obtained by machining the outer wall of the guide tube 3 delimiting a flexible blade 1 1b providing a certain freedom of movement to said stop with respect to the longitudinal axis of said tube.
- the flexible blade 11b of the retractable abutment 11 has on its inner face and directed inside the internal bore 3b of the guide tube 3 a tooth 1 1c whose arcuate profile is arranged in the extension of the profile circular of said internal bore.
- the retractable stop 1 1 and the transmission stud 12 cooperate with a gripping wheel 8 arranged around the guide tube 3 and allowing depending on its direction of rotation around said tube to move or not said stop.
- the gripping wheel 8 comprises a first space 8a inside which cooperates the C-shaped profile of the retractable abutment 1 1. Inside the first space 8a is arranged a cam 15 whose outer profile comes into contact with the inclined one 11d of the opening 1 1a during the rotation of the gripping wheel 8 in order to move the tooth 11c closer to or closer to the retractable stop 1 1 of the central and longitudinal axis of the guide tube 3 (FIGS. 12).
- the gripping wheel 8 comprises a second space 8b disposed opposite the first 8a and inside which is housed the torque transmission pad 12 arranged on the periphery of the guide tube 3.
- the second space 8b has an internal profile for delimiting near the outer bore of the guide tube 3 a first abutment 13 called “screw abutment” and opposite a second abutment 14 called “abutment abutment” on which bears the pad 12 according to the direction of rotation of the grip wheel 8 around said guide tube.
- the self-locking screwdriver 1 comprises between the guide tube 3 and the clamping rod 4 a connecting rod 9 for connecting said clamping rod to a holding handle 16.
- the connecting rod 9 has at one of its ends and on its outer periphery a series of teeth 10 whose external profile is complementary to that of the tooth 1 1c of the retractable stop 11.
- the connecting rod 9 comprises in the extension of the teeth 10 a connecting device 17 consisting on the one hand of a blind internal bore 17a and on the other hand an arrangement of elastically deformable strips 17b for receiving and locking in translation and rotation of the clamping rod 4.
- the clamping rod 4 has, opposite its connection with the connecting rod 9, an external cavity 5 cooperating with the internal cavity formed in the head 6a of the anchoring screw 6 to allow the rotary drive of this last when the guide tube 3 is immobilized on the connector 2a.
- the gripping handle 8 is driven in a clockwise rotation around the guide tube 3 in order to position the torque transmission pad 12 against the first abutment 13 called “screw stop" so that the torque is transmitted by said stud 12 to the guide tube 3;
- the clamping rod 4 is rotated by means of the handle 16 and the connecting rod 9 in order to screw the anchor screw 6 in the body of the vertebra Ve to fix the implant 2.
- the locking system of the screwdriver 1 can be unlocked to allow the unscrewing of the guide tube 3 of the connector 2a of the implant 2 after its anchoring in the bone body by means of the anchoring screw 6 .
- Unlocking of the locking system is effected by a counterclockwise movement of the gripping wheel 8 around the guide tube 3.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1654433A FR3051351B1 (en) | 2016-05-18 | 2016-05-18 | AUTOMATIC LOCKING SCREWDRIVER |
PCT/EP2017/061404 WO2017198553A1 (en) | 2016-05-18 | 2017-05-11 | Orthopaedic screwdriver with automatic locking |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3457962A1 true EP3457962A1 (en) | 2019-03-27 |
Family
ID=56148586
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17722052.2A Withdrawn EP3457962A1 (en) | 2016-05-18 | 2017-05-11 | Orthopaedic screwdriver with automatic locking |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3457962A1 (en) |
JP (1) | JP7160687B2 (en) |
FR (1) | FR3051351B1 (en) |
WO (1) | WO2017198553A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10575881B2 (en) * | 2016-05-18 | 2020-03-03 | Clariance | Self-locking screwdriver |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19851370C2 (en) * | 1998-11-07 | 2000-09-21 | Aesculap Ag & Co Kg | Endoscopic insertion instruments |
EP2051648B1 (en) * | 2006-08-17 | 2014-09-24 | Synthes GmbH | Push-off driver for bone screws |
US20090275992A1 (en) * | 2008-04-30 | 2009-11-05 | Phan Christopher U | Apparatus and methods for inserting facet screws |
KR101020247B1 (en) * | 2010-10-28 | 2011-03-07 | 주식회사 디오메디칼 | A screw-driver for combining a pedicle screw |
US8784431B1 (en) * | 2012-06-11 | 2014-07-22 | Choice Spine, Lp | Medical screwdriver |
DE102014109200A1 (en) * | 2014-07-01 | 2016-01-07 | Aesculap Ag | Medical screwdriver, shaft for the medical screwdriver and method for introducing pedicle screws |
-
2016
- 2016-05-18 FR FR1654433A patent/FR3051351B1/en active Active
-
2017
- 2017-05-11 EP EP17722052.2A patent/EP3457962A1/en not_active Withdrawn
- 2017-05-11 JP JP2018561055A patent/JP7160687B2/en active Active
- 2017-05-11 WO PCT/EP2017/061404 patent/WO2017198553A1/en unknown
Also Published As
Publication number | Publication date |
---|---|
JP2019517853A (en) | 2019-06-27 |
WO2017198553A1 (en) | 2017-11-23 |
FR3051351B1 (en) | 2019-05-03 |
JP7160687B2 (en) | 2022-10-25 |
FR3051351A1 (en) | 2017-11-24 |
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Legal Events
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