Bone fastening assembly
AssigneeAnthem Orthopaedics LLC
InventorAmir M. Matityahu
Life of this patent
Estimating the term…
Abstract
A bone fastening assembly for use with a screw and including a bone plate and a bushing having a bore adapted for receiving the screw. The bone plate has a substantially planar portion and is provided with a hole in the portion for receiving the bushing. The portion of the bone plate and the bushing are cooperatively configured for providing pivotal movement of the bushing within the hole about a pivot axis and restricting the pivot axis to a plane extending in the portion of the bone plate. A new bone attachment screw for use with the bone fastening assembly is provided.
Claims14
A bone fastening assembly for use with a screw comprising a bone plate, a bushing distinct from the bone plate and having an outer wall, the bushing being provided with an internally-threaded bore adapted for receiving the screw and a slit extending from the bore through the outer wall for permitting radial expansion of the bushing, the bone plate having a substantially planar portion and being provided with a hole in the portion of the bone plate for receiving the bushing, and cooperative engaging means carried by the portion and the bushing for capturing the bushing within the hole and restricting removal of the bushing from the hole when the bushing is substantially parallel to the portion so as to provide pivotal movement of the bushing within the hole about a single pivot axis that is restricted to a plane extending in the portion of the bone plate so that when the bushing is disposed in the hole of the bone plate and the screw is threaded into the bushing the bushing can be pivoted to a desired position relative to the bone plate and then positionally locked relative to the bone plate by further advancement of the screw through the bushing so as to cause the bushing to radially expand and frictionally lock within the hole of the bone plate.
A bone fastening assembly for use with a screw comprising a bone plate, an annular bushing distinct from the bone plate and having a threaded bore adapted for receiving the screw, the bushing being provided with a slit extending from the bore through the bushing to permit radial expansion of the bushing and first and second oppositely-extending protuberances, the bone plate having a substantially planar portion and being provided with a hole in the portion for receiving the bushing and first and second opposed sockets communicating with the hole for capturing respectively the first and second protuberances and restricting removal of the bushing from the hole when the bushing is substantially parallel to the portion so as to provide pivotal movement of the bushing within the hole about a single pivot axis that is restricted to a plane extending in the portion of the bone plate so that when the bushing is disposed in the hole of the bone plate and the screw is threaded into the bushing the bushing can be pivoted to a desired position relative to the bone plate and then positionally locked relative to the bone plate by further advancement of the screw through the bushing so as to cause the bushing to radially expand and frictionally lock within the hole of the bone plate.
A bone fastening assembly for use with a screw comprising a bone plate, an annular bushing having a bore adapted for receiving the screw, the bone plate having a substantially planar portion and being provided with a hole in the portion, first and second transversely-extending wing-shaped elements extending from one of the portion of the bone plate and the bushing, first and second transversely-extending sockets provided on the other of the portion of the bone plate and the bushing for receiving the respective first and second transversely-extending wing-shaped elements when the bushing is substantially perpendicular to the portion so as to permit the bushing to be inserted into the hole and capturing the respective first and second transversely-extending wing-shaped elements when the bushing is substantially parallel to the portion so as preclude removal of the bushing from the hole when the bushing is substantially parallel to the portion.
Dependencies are inferred from the claim text.