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Sizing plate and drill guide assembly for orthopaedic knee instrumentation

  • US 5,634,927 A
  • Filed: 07/06/1995
  • Issued: 06/03/1997
  • Est. Priority Date: 07/06/1995
  • Status: Expired due to Term
First Claim
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1. An orthopaedic instrumentation assembly for at least partially preparing an end of a bone with a drill for receiving a prosthesis, said instrumentation assembly comprising:

  • a drill guide including a drill guide opening for guiding a drill into the bone; and

    an orthopaedic plate member attachable to the end of the bone, said plate member including means for interconnecting with said drill guide;

    wherein said drill guide includes a first drill stop means and said orthopaedic plate member includes a second drill stop means, said first drill stop means and said second drill stop means coacting with each other for limiting projection and for maintaining axial alignment of the drill into the bone, and wherein said first drill stop means comprises a first shoulder on said drill guide, and said second drill stop means comprises a second shoulder on said plate member, and wherein said plate member includes a drill opening associated with said drill guide opening, and wherein said first shoulder is disposed at an inner periphery of said drill guide opening, and said second shoulder is disposed at an inner periphery of said drill opening, and wherein said drill opening of said plate member includes an interconnecting opening extending therefrom, such that the second shoulder on the inner periphery of the drill opening of said plate member forms only a partial circumferential shoulder, and wherein the first shoulder on the inner periphery of said drill guide opening of said drill guide provides a supplemental stop which complements the partial circumferential shoulder of the drill opening on said plate member, said first shoulder of said drill guide being positioned within the interconnecting opening of said plate member.

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