Alignment of hip joint sockets in hip joint replacement

Details Alignment of hip joint sockets in hip joint replacement Alignment of hip joint sockets in hip joint replacement

1990-08-28

1992-08-25

Hafer, Robert A.

Surgery

Instruments

Orthopedic instrumentation

606 89, 606 91, A61F 234

Patent

active

051415127

ABSTRACT:
An apparatus for aligning an acetabular cup for proper placement in a socket in hip joint replacement includes a frame having feet which are placed against and fastened to the anterior superior iliac spines and the pubic tubercles respectively of the pelvis. A light beam is directed from a source through an aperture to a mirror mounted on an implant inserter. The light beam is reflected back from the mirror to a target region. When the incident and reflected beams are coincident, the cup is aligned for correct placement. The target region is rotatably and pivotably mounted for precise adjustment of the angles of abduction and anteversion respectively.

REFERENCES:
patent: 3859992 (1975-01-01), Amstutz
patent: 4305394 (1981-12-01), Bertuch, Jr.
patent: 4475509 (1984-10-01), Oh
patent: 4528980 (1985-07-01), Kenna
patent: 4716894 (1988-01-01), Lazzeri et al.

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