The present invention generally relates to a fixation device used to facilitate reduction and repair of a fractured bone. More particularly, the present invention relates to a bone plate that counteracts deformation forces from surrounding tissue. More specifically, the present invention relates to a bone plate that is configured to maintain the connection of the bone plate with the portions of a fractured bone.
Fractures of bones such as the clavicle can be difficult to repair. Portions of the fractured clavicle are pulled in opposing directions by the interaction thereof with surrounding tissue. For example, deforming forces are applied to the fractured clavicle in at least two directions: (1) force from muscle traction superiorly, and (2) force from muscle traction inferiorly. As such, these deforming forces are transverse to the longitudinal axis of the fractured clavicle, and tend to pull portions of the fractured clavicle apart from one another.
Such deforming forces can destroy the connection between a typical bone plate and the fractured clavicle. Bone screws are used to attach the typical bone plate to the portions of the fractured clavicle, and the bone screws engage the superior cortex bone, the inferior cortex bone, and the medullary canal between the superior and inferior cortex bone. However, the cortex bone is relatively thin, and thus, the threads of the bone screws have a limited amount of bone to engage. That is, the superior and inferior cortex bone provide limited purchase for the threads of the bone screws. Thus, when subjected to the deforming forces, the limited amount of engagement of the bone screws afforded with the cortex bone can lead to failure of the connection between the bone plate and the fractured clavicle. As such, the portions of the fractured clavicle can be pull away from the typical bone plate by the deforming forces.
Therefore, there is a need for a fixation device and method of use associated therewith that is adapted to counteract the above-discussed deformation forces and maintain the connection of a bone plate with the portions of a fractured bone.
The present invention in a preferred embodiment contemplates a fixation device for facilitating reduction and repair of a fractured bone, the fixation device including a bone plate adapted to overlie and contact at least two bone fragments of the fractured bone, said bone plate having a body portion includes a first end, a second end, a length between said first and second ends, a first longitudinal edge, a second longitudinal edge, a width between said first and second longitudinal edges, and a bone contacting surface adapted to contact the exteriors of the at least two bone fragments, said body portion including a plurality of bone screw receiving apertures extending therethrough, a first aperture of said plurality of bone screw receiving apertures being adapted to overlie a first bone fragment of the at least two bone fragments and a second aperture of said plurality of bone screw receiving apertures being adapted to overlie a second bone fragment of the at least two bone fragments; at least two bone screws to secure said bone plate to the fractured bone, a first of said at least two bone screws adapted for insertion through said first aperture and into the first of the at least two bone fragments, and a second of said at least two bone screws adapted for insertion through said second aperture and into the second of the at least two bone fragments; and where said bone plate further includes at least two tines extending outwardly from one of said first and second longitudinal edges of said body portion, each of said at least two tines including a bone contacting surface adapted to contact the exterior of and support at least one of the first and second bone fragments, said bone contacting surfaces of said bone plate and said at least two tines being adapted to cradle the fractured bone and resist deformation forces in at least one direction when the fixation device is attached to the fractured bone.
The present invention in a further preferred embodiment contemplates a fixation device for facilitating reduction and repair of a fractured bone, the fixation device including a plate portion adapted to overlie and contact at least two bone fragments of the fractured bone, said plate portion having a first end, a second end, a length between said first and second ends, a first longitudinal edge, a second longitudinal edge, a width between said first and second longitudinal edges, and a bone contacting surface adapted to contact the exteriors of the at least two bone fragments, said plate portion including a plurality of bone screw receiving apertures extending therethrough, said plurality of bone screw receiving apertures being positioned between said first and second longitudinal edges, a first bone screw receiving aperture of said plurality of bone screw receiving apertures being adapted to overlie a first bone fragment of the at least two bone fragments and a second bone screw receiving aperture of said plurality of bone screw receiving apertures being adapted to overlie a second bone fragment of the at least two bone fragments, said plate portion including a first row of at least two apertures positioned along said first longitudinal edge and a second row of at least two apertures positioned along said second longitudinal edge, each of said apertures of said first and second rows of at least two apertures being adapted to receive a buttress pin therein; at least two bone screws to secure said bone plate to the fractured bone, a first of said at least two bone screws being adapted for insertion through said first aperture and into the first of the at least two bone fragments, and a second of said at least two bone screws being adapted for insertion through said second aperture and into the second of the at least two bone fragments; and at least two buttress pins, each of said at least two buttress pins being received in one of said apertures of said first and second rows of at least two apertures, said at least two buttress pins each having a head adapted to engage said plate portion, and a shaft including a bone contacting surface provided to contact the exterior of and support at least one of the first and second bone fragments, said bone contacting surfaces of said plate portion and said at least two buttress pins being adapted to cradle the fractured bone and resist deformation forces in at least one direction, when the fixation device is attached to the fractured bone.
The present invention in yet a further preferred embodiment contemplates a fixation device for facilitating reduction and repair of a fractured bone, the fixation device including a plate portion adapted to overlie and contact at least two bone fragments of the fractured bone, said plate portion having a first end, a second end, a length between said first and second ends, and a bone contacting surface adapted to contact the exteriors of at least two bone fragments, said plate portion including a plurality of bone screw receiving apertures extending therethrough, a first bone screw receiving aperture of said plurality of bone screw receiving apertures being adapted to overlie a first bone fragment of the at least two bone fragments, and a second bone screw receiving aperture of said plurality of bone screw receiving apertures being adapted to overlie a second bone fragment of the at least two bone fragments; at least two bone screws to secure said bone plate to the fractured bone, a first of said at least two bone screws being adapted for insertion through said first aperture and into the first of the at least two bone fragments, and a second of said at least two bone screws being adapted for insertion through said second aperture and into the second of the at least two bone fragments; and at least one clamp adapted to maintain the position of said plate portion with respect to one of the first and second bone fragments, said at least one clamp including a first portion and a second portion spaced apart from one another, where, when said at least one clamp is positioned over said plate portion and the one of the first and second bone fragments, said plate portion and the one of the first and second bone fragments are received between said first and second portions of said clamp.
It is understood that both the foregoing general description and the following detailed description are exemplary and exemplary only, and are not restrictive of the invention as claimed.
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate preferred embodiments of the invention. Together with the description, they serve to explain the objects, advantages and principles of the invention. In the drawings:
The following description is intended to be representative only and not limiting, and many variations can be anticipated according to these teachings. Reference will now be made in detail to the preferred embodiments of this invention, examples of which are illustrated in the accompanying drawings.
One preferred embodiment of a fixation device of the present invention is generally indicated by the numeral 10 in
Fixation device 10 includes a body portion 20 for bridging first and second portions 14 and 16, and various tines 22 extending outwardly from body portion 20. Furthermore, body portion 20 includes a first surface 24, a second surface 26, and apertures 28 extending between first and second surfaces 24 and 26. Furthermore, the body portion 20 can be shaped to conform to the shape of the bone requiring reduction and repair (i.e., the fractured clavicle 12 of
Body portion 20 includes first and second longitudinal edges 32 and 34, and tines 22 can be provided on both of first and second longitudinal edges 32 and 34. As depicted in
During use, second surface 26 of body portion 20 along with first surfaces 36 of tines 22 contact fractured clavicle 12. As such, as depicted in
Tines 22 in combination with body portion 20 cradle fractured clavicle 12, and, in doing so, tines 22 serve to buttress fractured clavicle 12 against the deforming forces in at least one direction. Accordingly, the combination of body portion 20 and tines 22 serves to resist the deforming forces to prevent the connection between fixation device 10 and fractured clavicle 12 from being destroyed.
While fixation device 10 includes two (2) of tines 22 (
As depicted in
Modular tines 58 serve the same function as tines 22 associated with fixation devices 10 and 10A, and can be placed similarly along body portion 52. That is, modular tines 58 can be positioned along first and second longitudinal edges 70 and 72 of body portion 52. As such, modular tines 58 can be positioned on body portion 52 to superiorly and inferiorly support fractured clavicle 12 when fixation device 50 is attached thereto.
Body portion 52 includes grooves 74 provided in first surface 54 thereof for receiving first portions 60 of modular tines 58 therein. The depth of grooves 74 and the thickness of first portions 60 afford first surface 54 (of body portion 52) and surface 64 to be flush with one another. Furthermore, fasteners (not shown) can be received through apertures 76 formed in first portions 60 (between surfaces 64 and 65) to secure attachment of modular tine 58 to body portion 52.
Like tines 22, second portions 62 of modular tines 58 have lengths substantially perpendicular to the longitudinal axis of body portion 52, and have widths substantially aligned with the longitudinal axis of body portion 52. During use, second surface 56 of body portion 52 along with surfaces 66 (of second portions 62) of modular tines 58 contact fractured clavicle 12. For example, modular tines 58 can be contacted to the inferior cortex of fractured clavicle 12. Furthermore, second portions 62 of modular tines 58 can be curved along the lengths thereof to accommodate the contour of fractured clavicle 12 and facilitate such contact. That is, surfaces 66 of second portions 62 of modular tines 58 can be concave to facilitate contact with the curved surface of fractured clavicle 12.
Another preferred embodiment of a fixation device of the present invention is generally indicated by the numerals 100 and 100A in
Fixation devices 100 and 100A are formed in part as bone plates, and, like fixation device 10, are used to stabilize fractured clavicle 12. Fixation devices 100 and 100A each include a body (or plate) portion 102 for bridging first and second portions 14 and 16 of fractured clavicle 12 (such as that depicted in
Although not shown in
Apertures 108 (extending between upper and lower surfaces 104 and 106) are spaced along the longitudinal axis of body portion 102. Apertures 108 of fixation device 100 and 100A are used for receiving bone screws (such as a bone screw 109 depicted in
A first row 110 of apertures 110A and a second row 112 of apertures 112A are provided adjacent longitudinal edges 114 and 116, respectively, of body portions 102 of fixation devices 100 and 100A. While apertures 108 are provided to overlie fractured clavicle 12, first and second rows 110 and 112 do not overlie (and hence, are offset from) fractured bone 12 when body portion 102 is positioned with respect thereto.
Furthermore, as depicted in
Apertures 110A and 112A of first and second rows of apertures 110 and 112 are each configured to receive buttress pins (or rods) 120 therein. As depicted in
Head portions 122 can be threaded to engage threads (not shown) that can be provided in apertures 110A and 112A of first and second rows of apertures 110 and 112. Thus, when body portion 102 is attached to fractured clavicle 12 (using, for example, bone screws 109), pins 120 can be received in apertures 110A and 112A of first and second rows of apertures 110 and 112 to position pins 120 superiorly and inferiorly relative to fractured clavicle 12. If shaft portions 124 are curved along the lengths thereof, threads provided on head portions 122 can be replaced with another mechanism for attaching pins 120 to body portions 100.
As depicted in
As depicted in
Besides fractured clavicle 12 depicted in
Rather than pins 120 depicted in
Furthermore, as depicted in
Fixation device 160 also includes one or more c-shaped clamps 170 to further stabilize fractured clavicle 12. One or more clamps 170 can be positioned relative to body portion 162 and fractured clavicle 12, and provide fixation device 160 with a degree of modularity. That is, clamp 170 can be selectively positioned along body portion 162 and first and second portions 14 and 16 of fractured bone 12. As depicted in
First leg portion 172 can include an aperture 178 formed therein, and second leg portion 174 can include an aperture 180 therein. Furthermore, clamp 170 can be positioned so that aperture 178 is aligned with one of apertures 168 formed in body portion 162. As such, one of the bone screws used to attach body portion 162 to fractured clavicle 12 can be received through aperture 178 of clamp 170 and one of apertures 168 formed in body portion 162. The bone screws can threadably or non-threadably engage body portion 162 and/or clamp 170. When installed, clamp 170 serves in supporting fractured clavicle 12 superiorly and inferiorly. In doing so, clamp 170 serves in buttressing fractured clavicle 12 against the deforming forces to prevent the connection between fixation device 160 and fractured clavicle 12 from being destroyed.
A modified clamp 170A and a modified clamp 170B are depicted in
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. Accordingly, it is intended that the specification and examples be considered as exemplary only.
The present application is a divisional of U.S. application Ser. No. 13/411,069, filed Mar. 2, 2012; which claims the benefit of provisional Application No. 61/448,739, filed Mar. 3, 2011; which is incorporated by reference herein.
Number | Date | Country | |
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61448739 | Mar 2011 | US |
Number | Date | Country | |
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Parent | 13411069 | Mar 2012 | US |
Child | 14189681 | US |