Bone fixation apparatus
First Claim
Patent Images
1. A bone fixation locking system, comprising:
- a locking sleeve comprising opposing upper and lower walls each comprising interior and exterior faces, opposing first and second sidewalls, and opposing first and second opened ends defining an aperture through said sleeve, said upper wall comprising a through-hole, said through-hole defined on the exterior face of the upper wall by a spherical convex outer perimeter, and said lower wall comprising a through-hole, wherein the upper and lower wall through-holes of the locking sleeve share a common axis.
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Accused Products
Abstract
A polyaxial bone fixation system minimizes the number of parts used to engage a bone bolt in various angular orientations relative to an elongated plate or rods, and also permits for nearly infinite positioning of two or more bone bolts relative to each other along the length of an elongated plate or rods.
35 Citations
53 Claims
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1. A bone fixation locking system, comprising:
a locking sleeve comprising opposing upper and lower walls each comprising interior and exterior faces, opposing first and second sidewalls, and opposing first and second opened ends defining an aperture through said sleeve, said upper wall comprising a through-hole, said through-hole defined on the exterior face of the upper wall by a spherical convex outer perimeter, and said lower wall comprising a through-hole, wherein the upper and lower wall through-holes of the locking sleeve share a common axis. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A bone fixation locking system, comprising:
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a locking sleeve comprising opposing upper and lower walls each comprising interior and exterior faces, opposing first and second sidewalls, and opposing first and second opened ends defining an aperture through said sleeve, said upper wall comprising a through-hole, said through-hole defined on the exterior face of the upper wall by a spherical convex outer perimeter, and said lower wall comprising a through-hole, said through-hole defined on the exterior face of the lower wall by a spherical convex outer perimeter, wherein the upper and lower wall through-holes of the locking sleeve share a common axis; and
first and second compression washers, each comprising a concave spherical lower surface for engagement with the spherical convex outer perimeters of the exterior face upper and lower wall through-holes. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A bone fixation apparatus, comprising:
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an elongated plate having a longitudinal axis, and comprising upper and lower surfaces, first and second outer edges parallel to said longitudinal axis, first and second ends defining a longitudinal dimension, and an opening bounded by said first and second outer edges and said first and second ends, and oriented along the longitudinal axis;
a locking sleeve for slidably engaging with the elongated plate, the locking sleeve comprising opposing upper and lower walls each comprising interior and exterior faces, opposing first and second sidewalls, and opposing first and second opened ends defining an aperture through said sleeve, said upper wall comprising a through-hole, said through-hole defined on the exterior face of the upper wall by a spherical convex outer perimeter, and said lower wall comprising a through-hole, said through-hole defined on the exterior face of the lower wall by a spherical concave inner perimeter, wherein the upper and lower wall through-holes of the locking sleeve share a common axis, and wherein said through-hole axis intersects at substantially right angles the longitudinal axis of the elongated plate when said locking sleeve is engaged with said elongated plate; and
a compression washer comprising a concave spherical lower surface for engagement with the spherical convex outer perimeter of the exterior face upper wall through-hole. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. A bone fixation apparatus, comprising:
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at least one bone bolt comprising a threaded first end portion, a central portion comprising a spherical convex upper surface adjacent to the first end portion, and a threaded second end portion;
an elongated plate having a longitudinal axis and comprising upper and lower surfaces, first and second outer edges parallel to said longitudinal axis, first and second ends defining a longitudinal dimension, and an opening for receiving the threaded first end portion of the at least one bone bolt, said opening bounded by said first and second outer edges and said first and second ends, and oriented along the longitudinal axis;
a locking sleeve for slidably engaging with the elongated plate, the locking sleeve comprising opposing upper and lower walls each comprising interior and exterior faces, opposing first and second sidewalls, and opposing first and second opened ends defining an aperture through said sleeve, said upper wall comprising a through-hole, said through-hole defined on the exterior face of the upper wall by a spherical convex outer perimeter, and said lower wall comprising a through-hole, said through-hole defined on the exterior face of the lower wall by a spherical concave inner perimeter, wherein the upper and lower wall through-holes of the locking sleeve share a common axis, and wherein said through-hole axis intersects at substantially right angles the longitudinal axis of the elongated plate when said locking sleeve is engaged with said elongated plate; and
a compression washer comprising a concave spherical lower surface for engagement with the spherical convex outer perimeter of the exterior face upper wall through-hole. - View Dependent Claims (38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52)
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53. A bone fixation apparatus, comprising:
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an elongated plate having a longitudinal axis and comprising upper and lower surfaces and having a longitudinal dimension, and a central opening parallel to the longitudinal axis and having a length that is less than the longitudinal dimension, said opening adapted to receive at least two bone bolts;
a locking sleeve comprising opposing upper and lower walls each comprising an exterior and an interior face, opposing first and second sidewalls, and an aperture through which the elongated plate can be inserted, said upper and lower walls each comprising through-holes that share a common axis and are adapted for receiving a portion of a bone bolt, wherein said through-hole axis intersects at substantially right angles with the longitudinal axis of the elongated plate when said elongated plate is inserted through said aperture, and wherein the through-holes are adapted with means to permit positioning of an inserted bone bolt along a range of axes that transect the through-hole axis, and wherein at least the upper wall through-hole comprises on the exterior face a domed convex outer perimeter;
at least one bone bolt comprising a threaded first end portion adapted for insertion through the opening in the longitudinal plate and the locking sleeve through holes, a central portion that cannot be passed through the opening in the longitudinal plate and the locking sleeve through-holes and comprising a spherical convex upper surface adjacent to the first end portion, and a threaded second end portion adapted for insertion into bone; and
at least one compression washer comprising a concave spherical lower surface for engagement with the spherical convex outer perimeter of the exterior face upper wall through-hole.
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Specification