| 摘要 |
The present invention provides an improved method and apparatus for removing an acetabular cup from an acetabulum. An osteotome instrument includes an elongated handle shaft terminating in a head portion. One of a plurality of interchangeable spherical heads, and one of a plurality of interchangeable osteotomes having curved blades, may be attached to the head portion of the instrument, and are selected based upon the size of the acetabular cup to be removed. In use, the spherical head of the instrument is seated within the recess of the liner of the acetabular cup such that the end of the osteotome blade is disposed closely adjacent the rim of the acetabular cup. Thereafter, the handle shaft of the instrument may be pivoted and/or rotated to make several cuts with the curved osteotome blade, which are closely adjacent the outer hemispherical surface of the acetabular cup, until the acetabular cup may be removed from the acetabulum.
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