Quantitative assessment of prosthesis press-fit fixation
AssigneeKambiz Behzadi
InventorsKambiz Behzadi, Michael E. Woods
Life of this patent
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Abstract
A system and method for quantitatively assessing a press fit value (and provide a mechanism to evaluate optimal quantitative values) of any implant/bone interface regardless the variables involved including bone site preparation, material properties of bone and implant, implant geometry and coefficient of friction of the implant-bone interface without requiring a visual positional assessment of a depth of insertion. The following description is presented to enable one of ordinary skill in the art to make and use the invention and is provided in the context of a patent application and its requirements.
Claims11
A method for an installation of an acetabular cup into a sculpted cavity in a portion of bone, the acetabular cup including an irregularly-profiled exterior surface defining a generally hemispherical interior cavity with the installation configured to impart a desired orientation profile to the acetabular cup within the sculpted cavity subsequent to the installation, comprising:
- preparing the sculpted cavity in the portion of bone, said sculpted cavity defining an irregularly-profiled cavity volume, said irregularly-profiled cavity volume complementary to the irregularly-profiled exterior surface;
- and
- installing the acetabular cup into the sculpted cavity;
- wherein a composite of the irregularly-profiled cavity volume and said irregularly-profiled exterior shell cooperatively defines a unique orientation key producing the desired orientation profile for the acetabular cup when installed into the irregularly-profiled cavity.
A method preparing a set of elements for an installation of an implant into a prepared cavity of a portion of bone, the installation including a desired orientation profile for the implant within the prepared cavity after the installation, comprising:
- a) establishing, pre-operatively, the desired orientation profile;
- b) producing the implant having a body defining a body portion configured for fixation within the prepared cavity, said body portion including a body keying structure;
- and
- c) producing the prepared cavity having an interior wall surface defining a cavity portion configured for receiving said body portion, said cavity portion including a cavity keying structure complementary to said body keying structure;
- wherein a composite of said keying structures cooperatively produce the desired orientation profile for the implant by defining a unique key imparting the desired orientation profile when said body portion is fixated within said cavity portion.
Dependencies are inferred from the claim text.