CA2738892A1 - Orthopedic implant in the form of a plate to be fixed between two bone parts - Google Patents

Orthopedic implant in the form of a plate to be fixed between two bone parts Download PDF

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Publication number
CA2738892A1
CA2738892A1 CA2738892A CA2738892A CA2738892A1 CA 2738892 A1 CA2738892 A1 CA 2738892A1 CA 2738892 A CA2738892 A CA 2738892A CA 2738892 A CA2738892 A CA 2738892A CA 2738892 A1 CA2738892 A1 CA 2738892A1
Authority
CA
Canada
Prior art keywords
plate
bone parts
implant
screw
rib
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
CA2738892A
Other languages
French (fr)
Other versions
CA2738892C (en
Inventor
Bernard Prandi
Keith Wapner
Charles P. Wapner
Peter W. Wapner
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.)
Stryker European Operations Holdings LLC
Original Assignee
Memometal Technologies SAS
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=40433892&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2738892(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Memometal Technologies SAS filed Critical Memometal Technologies SAS
Publication of CA2738892A1 publication Critical patent/CA2738892A1/en
Application granted granted Critical
Publication of CA2738892C publication Critical patent/CA2738892C/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
    • 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
    • A61B17/8004—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates with means for distracting or compressing the bone or bones
    • A61B17/8014—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates with means for distracting or compressing the bone or bones the extension or compression force being caused by interaction of the plate hole and the 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
    • A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
    • A61B17/8004—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates with means for distracting or compressing the bone or bones
    • 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
    • A61B17/8052—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates immobilised relative to screws by interlocking form of the heads and plate holes, e.g. conical or threaded
    • 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
    • A61B17/8052—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates immobilised relative to screws by interlocking form of the heads and plate holes, e.g. conical or threaded
    • A61B17/8057—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates immobilised relative to screws by interlocking form of the heads and plate holes, e.g. conical or threaded the interlocking form comprising a thread
    • 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
    • A61B17/8061—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, 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
    • A61B17/808—Instruments for holding or positioning bone plates, or for adjusting screw-to-plate locking mechanisms
    • 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
    • A61B17/809—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates with bone-penetrating elements, e.g. blades or prongs
    • 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
    • A61B17/846—Nails or pins, i.e. anchors without movable parts, holding by friction only, with or without structured surface
    • 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
    • A61B2017/681—Alignment, compression, or distraction mechanisms

Landscapes

  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Neurology (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)
  • Prostheses (AREA)

Abstract

The invention relates to a plate (1) fixed between two bone parts by means of screws engaged in holes (1b) formed in the thickness of said plate. The plate (1) comprises a rib which is inclined according to an angle of between 30° and 60° in relation to the plane defined by the plate and has a hole (1a1) for engaging a screw (2). Said rib is located in the central part of the width, over a determined part of the length of the plate so that the screw (2) brings the two bone parts into the compressive position.

Description

ORTHOPEDIC IMPLANT IN THE FORM OF A PLATE TO BE FIXED
BETWEEN TWO BONE PARTS

The invention relates to the technical field of orthopedic implants.

More particularly, the invention relates to a plate for arthrodesis or osteosynthesis, which plate is to be fixed between two bone parts.
In a manner entirely familiar to a person skilled in the art, this type of plate generally comprises holes for the engagement of screws for performing arthrodesis between two bones or osteosynthesis between two bone fragments. This is the case, for example, for the bones of the hand or of the foot, without this excluding other uses, particularly in the area of the spine.
Depending on the pathological condition that is to be treated, these plates can have a generally rectilinear shape or can have other geometric shapes.

Proceeding from this background art, one of the problems addressed by the invention is that of improving, in a reliable and effective manner, the compression between the bone parts secured to the plate and in a precise direction.

To solve the problem of improving the compression between the two bone parts concerned, the plate according to the invention has at least one feature allowing at least one screw to be positioned in an inclined manner with respect to the plane defined by said plate at an angle of between about 30 and 60 .

According to an advantageous embodiment, the feature is formed by an area inclined at the angle of between 30 and 60 and having a hole for the engagement of the screw. The inclined area results from cutting and deforming part of the plate.
- 2 -In another embodiment, the feature is formed by a hole inclined at the angle of between 30 and 60 for the engagement of the screw.
In light of the problem to be solved, the feature is located over a defined part of the length of the plate, such that the screw ensures the compression of the two bone parts.
The invention is explained in more detail below with reference to the figures in the attached drawings, in which:

- Figure 1 is a perspective view of an embodiment of the plate;

- Figure 2 is a profile view of the plate;

- Figures 3 and 4 are perspective views showing the fitting of the plate between two boue parts and the composition of these bone parts, by means of the plate according to the invention, the bone parts being shown schematically.
According to the invention, the plate (1) has at least one feature (la) allowing at least one screw (2) to be positioned in an inclined manner at an angle a of between 30 and 60 with respect to the plane defined by said plate (Figure 2).

In one embodiment, the feature (la) is formed by an inclined area that results from cutting and deforming part of the plate. For example, the deforming takes place subsequent to a cutting/punching operation. This inclined area constitutes a rib, which has a hole (lal) for the engagement of the screw (2) . The inclined rib (la) is formed over a defined part of the length of the plate, such that, after engagement, the screw (2)
- 3 -ensures the compression of the two boue parts, as will be explained in the description below.

In one embodiment, in order to permit an angular orientation of the screw (2) at an angle of between about 30 and 60 , the feature (la) can be formed by an inclined hole. It will be noted that the rib (la) allows the angle to be adapted depending on the pathological condition that is to be treated, given that it is possible to deform this rib at will. In other words, the angle can be adjusted directly by the surgeon by a few degrees in the operating theater with a suitable instrument.

Reference is made to Figures 3 and 4, which show the positioning of the plate (1) between two boue parts (01) and (02):

= After the osteotomies, a model of the plate, which model does not have ribs, allows the position of this rib to be determined.

= Having determined the position of the rib, the surgeon creates a corresponding recess, with a suitable rasp.

= After the plate with the rib has been placed in position, the surgeon fits one or two screws (3), on the osteosynthesis site of the arthrodesis to the side of the rib. A pin for temporary fixation can optionally be positioned in a suitable hole.

= The screw (2) is then engaged in the hole (lai) of the rib (la) in order to compress the fracture site.

= Once the compression has been obtained, the surgeon can screw one or more other fixing screws (3) and remove the temporary holding pin.
- 4 -In a known manner, this plate (1) has smooth and/or threaded fioles (lb) for engagement of the fixing screws (3) that are screwed into the bone parts (01) and (02), as can be seen from Figures 3 and 4.

Likewise, the plate (1) can have at least one recess (lc) for the insertion of a pin for ensuring temporary fixation of said plate (1). The plate (1) can advantageously have a recess (1c) for the insertion of a pin into one of the bone parts (01) and another recess (ld) for the insertion of another pin into the other bone part (02).

In light of the desired compression effect, as indicated above, the recess (lc) is formed by a circular hole, of which the diameter corresponds substantially to that of the pin (4), while the other recess (1d) can be formed by an oblong slot.
These arrangements therefore allow the bone to slide under the plate (1) during screwing, while at the same time they ensure compression in a precise direction, generally along the axis of the plate. The pins are of any known and suitable type familiar to a person skilled in the art.

The plate (1) can have different geometric shapes, such that the holes (la) in particular can be aligned or can be arranged, in whole or in part, along the vertices of a triangle or of a trapezium. These arrangements of the screws in a triangle or trapezium improve the stability of the fixture.

It will also be noted that the plate (1), irrespective of its geometric shape, can be bent longitudinally in order to fit the curvature of the bone, thereby allowing the screws (2) to form an angle between each other.
- 5 -The advantages are clear from the description.

Claims (6)

1. An orthopedic implant in the form of a plate (1) to be fixed between two bone parts by means of screws engaged in holes (1b) formed in the thickness of said plate, characterized in that the plate (1) has a rib inclined at an angle of between 30° and 60° with respect to the plane defined by said plate and having a hole (1a1) for the engagement of a screw (2), said rib being located in the central part, in terms of width, over a defined part of the length of the plate, such that the screw (2) ensures the compression of the two bone parts.
2. The implant as claimed in claim 1, characterized in that the plate has a recess for the insertion of a pin into one of the bone parts, and another recess for the insertion of a pin into the other bone part.
3. The implant as claimed in claim 2, characterized in that one of the recesses is formed by a circular hole (1c), of which the diameter corresponds substantially to that of the pin, while the other recess is formed by an oblong slot.
4. The implant as claimed in one of claims 1 through 3, characterized in that the plate has smooth and/or threaded holes for receiving screws for fixing to the bone parts.
5. The implant as claimed in claim 4, characterized in that the different holes are aligned.
6. The implant as claimed in claim 4, characterized in that some of the holes are arranged along the vertex of a triangle or of a trapezium.
CA2738892A 2008-10-02 2009-10-02 Orthopedic implant in the form of a plate to be fixed between two bone parts Active CA2738892C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0856694 2008-10-02
FR0856694A FR2936700B1 (en) 2008-10-02 2008-10-02 ORTHOPEDIC IMPLANT IN THE FORM OF A PLATE TO BE FIXED BETWEEN TWO BONE PARTS
PCT/FR2009/051879 WO2010037985A1 (en) 2008-10-02 2009-10-02 Orthopedic implant in the form of a plate to be fixed between two bone parts

Publications (2)

Publication Number Publication Date
CA2738892A1 true CA2738892A1 (en) 2010-04-08
CA2738892C CA2738892C (en) 2014-08-05

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ID=40433892

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2738892A Active CA2738892C (en) 2008-10-02 2009-10-02 Orthopedic implant in the form of a plate to be fixed between two bone parts

Country Status (8)

Country Link
US (7) US8556946B2 (en)
EP (2) EP2334245B1 (en)
JP (1) JP5696268B2 (en)
AU (1) AU2009299628B2 (en)
CA (1) CA2738892C (en)
ES (1) ES2618102T3 (en)
FR (1) FR2936700B1 (en)
WO (1) WO2010037985A1 (en)

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US9078713B2 (en) 2015-07-14
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