Oblong acetabular cup
AssigneeJoint Medical Products Corporation
InventorsMichael J. Christie, Alfred F. DeCarlo, Jr., Timothy McTighe, Douglas G. Noiles
Life of this patent
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Abstract
An oblong acetabular cup which includes a cavity for receiving a bearing element is provided. The plane of the opening into the cavity is skewed relative to the prosthesis' longitudinal plane so as to achieve adduction correction, anteversion correction, or both adduction and anteversion correction. In certain preferred embodiments, the prosthesis is constructed from two components which can be oriented with respect to one another to achieve different directions and amounts of anteversion correction. In some embodiments, the two components form a cusp in the outside surface of the prosthesis. Surgical instruments and surgical methods for implanting the prostheses are disclosed.
Claims19
An acetabular cup for implantation in a patient's pelvis comprising a body having:
- (a) a first outer surface for engagement with bone,
- (b) a second outer surface having an overall oblong configuration which defines a longitudinal plane and a longitudinal axis, and
- (c) a cavity formed in the body for receiving a bearing element,
- said cavity having an opening formed in a portion of said second outer surface which defines a first plane, said first plane forming an acute angle with said longitudinal plane in a direction along the longitudinal axis such that when the acetabular cup is implanted in the patient's pelvis said first plane is more adducted than the longitudinal plane.
An acetabular cup for implantation in a patient's pelvis comprising a body having:
- (a) a first outer surface for engagement with bone,
- (b) a second outer surface having an overall oblong configuration which defines a longitudinal plane and a longitudinal axis, and
- (c) a cavity formed in the body for receiving a bearing element,
- said cavity having an opening formed in a portion of said second outer surface which defines a first plane, said first plane forming an acute angle with said longitudinal plane in a direction transverse to the longitudinal axis such that when the acetabular cup is implanted in the patient's pelvis said first plane is more anteverted than the longitudinal plane.
An acetabular cup comprising a body having:
- (a) a first outer surface for engagement with bone,
- (b) a second outer surface having an overall oblong configuration which defines a longitudinal plane and a longitudinal axis, and
- (c) a cavity formed in the body for receiving a bearing element,
- said cavity having an opening formed in a portion of said second outer surface which defines a first plane, said first plane intersecting said longitudinal plane at an angle greater than 0.degree..
An acetabular cup comprising a body having:
- (a) a first outer surface for engagement with bone,
- (b) a second outer surface having an overall oblong configuration which defines a longitudinal plane and a longitudinal axis, and
- (c) a cavity formed in the body for receiving a bearing element,
- said cavity having an opening formed in a portion of said second outer surface which defines a first plane, said first plane forming an acute angle with said longitudinal plane.
Dependencies are inferred from the claim text.