Method and apparatus for removing an acetabular cup
First Claim
1. An apparatus for removing an acetabular cup from an acetabulum, said apparatus comprising:
- a handle;
a pivot element connected to said handle, said pivot element dimensioned to be received within an acetabular cup; and
a blade connected to said handle and spaced from said pivot element, such that when said pivot element is received within said acetabluar cup, said blade is disposed externally of said acetabular cup closely adjacent an outer surface of said acetabular cup.
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Accused Products
Abstract
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.
80 Citations
18 Claims
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1. An apparatus for removing an acetabular cup from an acetabulum, said apparatus comprising:
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a handle;
a pivot element connected to said handle, said pivot element dimensioned to be received within an acetabular cup; and
a blade connected to said handle and spaced from said pivot element, such that when said pivot element is received within said acetabluar cup, said blade is disposed externally of said acetabular cup closely adjacent an outer surface of said acetabular cup. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A kit for removing an acetabular cup from an acetabulum, comprising:
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an osteotome instrument;
a spherical head removably mountable to said instrument, said spherical head sized to be received within an acetabular cup; and
a blade removably mountable to said instrument. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 17, 18)
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16. A method for removing an acetabular cup from an acetabulum, the acetabular cup having an outer surface, said method comprising the steps of:
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providing an instrument including a spherical head and a blade, the spherical head and the blade spaced from one another;
seating the spherical head within the acetabular cup;
moving the instrument to make a series of cuts with the blade which are closely adjacent the outer surface of the acetabular cup; and
removing the acetabular cup from the acetabulum.
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Specification