Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Implantable prosthesis – Bone
Patent
1990-11-13
1992-01-14
Isabella, David J.
Prosthesis (i.e., artificial body members), parts thereof, or ai
Implantable prosthesis
Bone
A61F 232
Patent
active
050806777
ABSTRACT:
An acetabular implant comprising a metal cup shell (2) adapted for securing to the pelvic bone of a patient and a plastic insert (9) for receiving the ball portion of a hip joint. A cavity (4) of the metal cup shell (2) and the outre surface of the plastic insert (9) are dimensioned to allow a pressure fit of the plastic insert (9) within the cavity (4) at the body temperature of the patient. The inner surface (6, 8) of the metal shell (2) defining the cavity (4) is provided with one or more apertures (10, 16), e.g., a circumferential groove (10) and a radial groove (16), into which the plastic material of the insert (9) may flow when the insert (9) is fitted to provide a mechanical interlock between the insert (9) and cup shell (2), thereby securing the insert (9) against rotational and distractional forces relative to the metal cup shell (2).
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Bauer Stephen W.
Griswold Gary L.
Isabella David J.
Kirn Walter N.
Minnesota Mining and Manufacturing Company
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