Acetabular component of hip joint prosthesis

Details Acetabular component of hip joint prosthesis Acetabular component of hip joint prosthesis

A - Human Necessities

61

F

3/105

A61F 2/32 (2006.01) A61F 2/34 (2006.01) A61F 2/00 (2006.01)

Patent

CA 1329449

-9- Abstract of the Disclosure ACETABULAR COMPONENT OF HIP JOINT PROSTHESIS 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 outer 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).

608555

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