EP3060147A1 - Implant de stabilisation scapho-lunaire. - Google Patents
Implant de stabilisation scapho-lunaire.Info
- Publication number
- EP3060147A1 EP3060147A1 EP14824050.0A EP14824050A EP3060147A1 EP 3060147 A1 EP3060147 A1 EP 3060147A1 EP 14824050 A EP14824050 A EP 14824050A EP 3060147 A1 EP3060147 A1 EP 3060147A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- implant
- central
- central portion
- end portions
- scapholunate
- 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- Withdrawn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
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/42—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes
- A61F2/4261—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes for wrists
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- 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 or setting implements
- 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
- A61B17/8061—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates specially adapted for particular bones
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- 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 or setting implements
- 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
- A61B17/8085—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates with pliable or malleable elements or having a mesh-like structure, e.g. small strips
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/42—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes
- A61F2/4261—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes for wrists
- A61F2002/4271—Carpal bones
- A61F2002/4287—Proximal carpal row, i.e. bones adjacent the radius and the ulna
- A61F2002/4289—Scaphoid or navicular bone
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/42—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes
- A61F2/4261—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes for wrists
- A61F2002/4271—Carpal bones
- A61F2002/4287—Proximal carpal row, i.e. bones adjacent the radius and the ulna
- A61F2002/4292—Lunate
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2250/0014—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis
- A61F2250/0018—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis differing in elasticity, stiffness or compressibility
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
- A61F2310/00005—The prosthesis being constructed from a particular material
- A61F2310/00011—Metals or alloys
- A61F2310/00023—Titanium or titanium-based alloys, e.g. Ti-Ni alloys
Definitions
- the present invention relates to a scapholunate stabilization implant.
- the scaphoid and the lunate are two of the eight bones constituting the carp of the hand.
- the intra-articular ligament connecting these two bones called scapholunate ligament, can undergo lesions such as tearing, tearing, ....
- the failure of this ligament creates instability which causes early osteoarthritis.
- the surgeon can perform suture or ligament reinsertion, which is only possible if the ligament is still vascularized.
- the ligament reinsertion associated with capsulodesis is the most commonly used technique. Whatever the technique used, if it allows to bring the bones together and effectively reduce the scaphoid, after removing the intra-articular fibrosis, the results can be good.
- these soft-tissue techniques are reserved for dynamic instabilities or for easily reducible static instabilities. Although these techniques can restore carp dynamics and although the danger of osteoarthritis is distant, the injured ligament never regains its original abilities.
- arthrodesis radically modifies the mechanics of carp. Although arthrodesis is reliable in the long term, these interventions have many disadvantages, the main one being the risk of nonunion. Moreover, these interventions are often stiffening in flexion and extension so that the patient loses much of these movement capabilities. Finally, the risk of new rupture after anatomical repair of the ligament is not negligible.
- these devices consist of two plates intended to be anchored in or attached to each of the two bones to be connected, and a rod or wire for making the connection of said two plates.
- This generally trapezoidal stabilization implant capable of replacing the broken scapholunral ligament or of reinforcing the injured scapulmonary ligament consists of an oblong plate made of a material having an elastic deformation capacity, of which the ends are provided with at least one hole allowing the passage of fixing screws, and whose central part has an opening defined by two opposite sides, a predetermined stiffness spring connecting two distant points, preferably two opposite points of said sides, this spring being disposed along the diagonal, in said opening.
- This device makes it possible in particular: to provide an implant that effectively fills the functions of the scapholunate ligament, to allow a rapid and precise implementation of this implant, to allow relative movements of the scaphoid and the semilunar, that is, a good wrist function.
- This device has shown that it was desirable to make some important changes in order to improve its performance.
- the geometry of the implant is such that it does not support torsion movements in a direction perpendicular to the plane of the implant whereas the scaphoid and the semi-lunar are two bones that rotate relative to each other during certain movements of the hand.
- An object of the present invention is to provide orthopedic surgeons with a simple, flexible, resistant and minimally invasive stabilization implant, making it possible to form a mechanical connection between the scaphoid and the semilunar reproducing the role of the scapholunate ligament allowing restore the initial mobility of the carpal bones (scaphoid and semi-lunar) and free from the aforementioned drawbacks.
- the device was designed to allow the relative movements of the scaphoid and the lunate while resisting the forces imposed.
- the scapholunate stabilization implant according to the invention comprises a central part provided with an elastic deformation capacity allowing traction or compression movements of the implant, and two parts end-pieces with elastic deformation capacity allowing torsional movements of the implant.
- the implant may comprise a central portion, a first end portion and a second end portion, the first and second end portions being each provided with at least one hole allowing the passage of fastening screws. .
- the central portion and the first and second end portions are respectively connected by first and second torsion rods adapted to withstand torsional deformations of the implant.
- the central portion may comprise at least one central bar and side bars connected to the central bar by a plurality of parallel transverse beams.
- a single central bar When a single central bar is used, it may be connected to one of the end portions and the side bars may be connected to the other end.
- the central portion comprises a first and a second central bar and side bars, each of the lateral bars being connected by a plurality of transverse beams respectively to the first bar. central and the second central bar.
- the beams are preferably parallel to each other.
- the device according to the invention provides several interesting advantages.
- the beams each have a first end connected to one of the first and second central bars, a second end connected to one of the first and second lateral bars and a central portion, the beams having a section decreasing from their first and second ends towards their central portion.
- the central portion of the implant may have, in its middle, a transverse spacing! separating the first and second central bars and delimited by the side bars of the central portion.
- the transverse spacing greater than the spacing between the beams, allows for greater compression or extension of the implant.
- the lateral ends may have a generally triangular shape and each end of the scapholunate stabilization implant is provided with two screw holes.
- the lateral ends have an asymmetric arrow shape whose fins have the holes for the fixing screws and whose central rods for connecting said ends to the central part of the implant constitute the rods. torsion of said implant.
- the implant may comprise, on at least one of its end portions, a positioning lug, or two diametrically opposed positioning lugs, said one or more lugs being provided with a hole allowing the passage of a temporary stabilizing spindle, this or these locating ear (s) being disposed (s) near the holes for the fixing screws.
- the positioning ears can be scored so that when the implant has been - -
- the scapolar stabilization implant may be made of any biocompatible material having the necessary robustness and elasticity.
- the lateral ends of the implant are made of polymer, such as polyetheretherketone (PEEK) and the central part is made of titanium alloy, the bars connecting the central part to the lateral ends being thus made of alloy of titanium overmoulded with PEEK.
- PEEK polyetheretherketone
- FIG. 1 is a view from above of a first embodiment of the scapholunate stabilization implant, illustrated in a rest position.
- Figure 2 is a view similar to Figure 1, showing the implant according to the invention subjected to a tensile force.
- Figure 3 is a view similar to Figure 1, showing the implant according to the invention subjected to a compressive force.
- Figure 4 is a view similar to Figure 1, showing the implant according to the invention subjected to a torsion force.
- Figure 5 is a view similar to Figure 1, showing the implant according to the invention subjected to a bending force of the implant.
- FIG. 6 is a view similar to FIG. 1 and showing another embodiment of the scapholunate stabilization implant according to the invention.
- Figure 7 is a detail view of the central portion of the implant.
- Figure 8 is a view illustrating the implant positioned on the scaphoid and the lunate with one hand.
- This scapholunal stabilization implant which is substantially symmetrical, consists of a central portion 1 provided with an elastic deformation capacity allowing the traction movements of the implant, and two end portions 2a, 2b provided with an elastic deformation capacity allowing torsional movements of the implant, these end portions being provided with at least one hole 3 allowing the passage of fixing screws, said central portion 1 and said end portions 2a, 2b being connected by means of torsion rods 4a, 4b able to withstand the torsional deformations of the implant,
- each end portion 2a, 2b of the stabilizing implant is provided with two holes 3 spaced from fixing screw passage.
- These fastening screws are, for example, of the self-tapping double-threaded type that can thus automatically sculpt, during their screwing, the tapping of the holes 3 which are advantageously of conical shape.
- the four holes 3 which is thus provided with the stabilizing implant draw a general shape of trapezium, this general shape is dictated by the anatomy of the bones to be connected.
- the scapholunate stabilization implant has a general shape of an elongated hexagon.
- the central portion 1 of the implant has a rectangular shape, or approximately rectangular. This central part comprises central bars 6a and 6b and lateral bars 7a, 7b connected by a plurality of parallel transverse beams 5.
- the beams 5 have a decreasing section towards their central portion. This characteristic gives the central part an elasticity thus allocating it a better tolerance to deformation by elongation, under the effect of a tensile force for example (see Figure 2).
- the same number of beams 5 respectively connect each central bar 6a, 6b to the lateral bars 7a, 7b.
- the central portion 1 has, in its middle, a transverse spacing 8 delimited by the lateral bars 7a, 7b. This spacing allows the central portion to support the compressive movements to which the implant can be subjected (see Figure 3).
- the central portion 1 thus formed has the role of maximizing the capacity of the implant to withstand the deformation. It allows elongation in traction as well as a transmission of effort.
- the end portions 2a, 2b have a generally triangular shape. This shape makes it possible in particular to increase the useful length of the implant.
- these ends 2 have an asymmetrical shape of arrow whose fins 9a, 9b comprise the holes 3 for the passage of the fixing screws and whose central rods for connecting said ends 2a, 2b to the central part 1 of the implant constitute the torsion rods 4a, 4b of said implant.
- torsion rods allow the implant to withstand the torsion forces experienced by the latter and, therefore, facilitate the twisting movement undergone by the ligament.
- the ends of the central bars 6a, 6b are extended so as to be implantable in the rods of the end portions 2a, 2b, for example by overmolding the latter on said ends of the central bars 6a, 6b respectively turned towards the end portions 2a, 2b.
- the implant according to the invention is also remarkable in that it is provided with at least one positioning lug 10 having a hole 11 for the passage of a temporary stabilizing spindle.
- the implant comprises two diametrically opposed lugs 10 disposed near the holes 3 for the passage of the fixing screws, each of the lugs 10 being provided with a hole 11.
- the positioning lugs 10 are breakable so that when the implant has been fixed on the patient's bones by means of the fixing screws, these positioning lugs, which are then useless, can be eliminated.
- the scapholunate stabilization implant is made of any biocompatible material having the necessary robustness and elasticity.
- the central portion 1 of the implant is made of titanium alloy
- the end portions 2 of said implant are made of polymer, such as polyetheretherketone (PEEK)
- PEEK polyetheretherketone
- the torsion rods 4a, 4b connecting the central portion 1 to the end portions 2a, 2b thus being made of titanium alloy overmolded with PEEK.
- the PEEK has very interesting mechanical characteristics because they allow a great deformation while ensuring a recovery of form in equilibrium position. This material is still advantageous in that it is transparent radio, and it does not undergo bone adhesions, so it is possible to remove easily, even after remaining in place in the body for several years.
- the titanium alloy (such as for example TA6V Eli or Nitinol ®) constituting the central part whose particular geometry of the beams that compose it gives it a general shape of combs facing each other in pairs allows to give it a more great robustness.
- the length of the implant must be sufficient to allow fixation of one of its ends, on the scaphoid S, and the fixing of its other end, on the semi-lunar L. It can for example measure of the order of 20 mm in length, and of the order of 8 mm in width.
Landscapes
- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Engineering & Computer Science (AREA)
- Veterinary Medicine (AREA)
- Public Health (AREA)
- Neurology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Vascular Medicine (AREA)
- Cardiology (AREA)
- Prostheses (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1360283A FR3012031B1 (fr) | 2013-10-22 | 2013-10-22 | Implant de stabilisation scapho-lunaire. |
| PCT/FR2014/052629 WO2015059387A1 (fr) | 2013-10-22 | 2014-10-15 | Implant de stabilisation scapho-lunaire. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3060147A1 true EP3060147A1 (fr) | 2016-08-31 |
Family
ID=49998442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP14824050.0A Withdrawn EP3060147A1 (fr) | 2013-10-22 | 2014-10-15 | Implant de stabilisation scapho-lunaire. |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US9907666B2 (fr) |
| EP (1) | EP3060147A1 (fr) |
| FR (1) | FR3012031B1 (fr) |
| WO (1) | WO2015059387A1 (fr) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5690631A (en) * | 1996-09-11 | 1997-11-25 | Walter Lorenz Surgical, Inc. | Multi-configurable plating system |
| EP1708629A4 (fr) * | 2004-01-08 | 2011-08-17 | David Mark Allison | Dispositif de fixation d'os |
| US20060235397A1 (en) * | 2005-03-31 | 2006-10-19 | Roy Sanders | Navicular fixation device |
| US20100217327A1 (en) * | 2009-02-24 | 2010-08-26 | Vancelette David W | Plate and system for lateral treatment of a fracture of the calcaneus |
| FR2948553B1 (fr) | 2009-07-30 | 2012-06-08 | Clariance | Dispositif anti recul a tiroirs pour prothese |
| FR2951072B1 (fr) | 2009-10-13 | 2011-11-18 | Biotech Internat | Implant de stabilisation scapho-lunaire |
| DE102012105125B3 (de) * | 2012-06-13 | 2013-08-14 | Hipp Medical Ag | Spannelement zum Fixieren von Bruchenden von Knochen einer Knochenfraktur |
-
2013
- 2013-10-22 FR FR1360283A patent/FR3012031B1/fr active Active
-
2014
- 2014-10-15 EP EP14824050.0A patent/EP3060147A1/fr not_active Withdrawn
- 2014-10-15 WO PCT/FR2014/052629 patent/WO2015059387A1/fr not_active Ceased
- 2014-10-15 US US15/029,118 patent/US9907666B2/en active Active
Non-Patent Citations (2)
| Title |
|---|
| None * |
| See also references of WO2015059387A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US9907666B2 (en) | 2018-03-06 |
| WO2015059387A1 (fr) | 2015-04-30 |
| US20160250031A1 (en) | 2016-09-01 |
| FR3012031B1 (fr) | 2018-08-31 |
| FR3012031A1 (fr) | 2015-04-24 |
| WO2015059387A4 (fr) | 2015-06-18 |
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