Acetabulum sizer and drill guide
First Claim
1. An acetabulum sizer adapted for use in implanting an acetabular cup prosthesis, which comprises a substantially hemispherical shell having an outside surface that generally conforms to the outside surface of the prosthesis and a circular peripheral rim, viewing ports in the shell for visual inspection of an acetabulum while the shell is seated therein, and handle means for manipulating the shell relative to the acetabulum.
7 Assignments
0 Petitions
Accused Products
Abstract
An acetabulum sizer and drill guide for use in implanting an acetabular cup prosthesis comprises a substantially hemispherical shell having an outside surface that generally conforms to the outside surface of the prosthesis to be fitted into a prepared acetabulum. Viewing ports in the shell enable visual inspection of the acetabulum during sizing thereof. A circular peripheral rim on the shell is generally flush with the peripheral boundary of a properly sized acetabulum when the shell is seated therein. Drill guide structure on the shell functions to guide a drill bit into the pelvis bone adjacent the acetabulum in preparing the acetabulum for the acetabular cup prosthesis. A handle is releasably connected to the drill guide structure for manipulating the shell during sizing and drilling.
283 Citations
22 Claims
- 1. An acetabulum sizer adapted for use in implanting an acetabular cup prosthesis, which comprises a substantially hemispherical shell having an outside surface that generally conforms to the outside surface of the prosthesis and a circular peripheral rim, viewing ports in the shell for visual inspection of an acetabulum while the shell is seated therein, and handle means for manipulating the shell relative to the acetabulum.
- 12. An acetabulum sizer adapted for use in implanting an acetabular cup prosthesis, which comprises a substantially hemispherical shell having an outside surface that generally conforms to the outside surface of the prosthesis and a circular peripheral rim, drill guide means on the shell for guiding a drill bit into the pelvis bone adjacent the acetabulum, and handle means for manipulating the shell relative to the acetabulum.
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21. A method of preparing an acetabulum prior to implanting an acetabular cup prosthesis therein, which comprises the steps of
removing bone and tissue from the acetabulum until it is properly sized; -
periodically positioning a hemispherical shell within the acetabulum, the shell having an outside surface that conforms to the outside surface of the prosthesis and a circular peripheral rim; viewing the acetabulum through ports in the shell while the shell is positioned therein; and determining whether the acetabulum is properly sized by comparing the peripheral rim of the shell with the peripheral boundary of the acetabulum, the acetabulum being properly sized when the peripheral rim of the shell is generally flush with the peripheral boundary of the acetabulum. - View Dependent Claims (22)
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Specification