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US 5,507,832 AGranted
Prosthesis with integral proximal spacer
AssigneeHowmedica, Inc.
InventorsMichael Michielli, Glen Kashuba, J. Mel Goldenberg, Jon I. Klippel
Life of this patent
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Abstract
A prosthesis with an integral proximal spacer is described. The prosthesis has a base element with a textured surface to aid in adhesion to bone cement. The integral spacer has a generally tripod shape. A top circumferential portion at least partially surrounds the proximal end of the prosthesis, and three legs extend distally along the length of the prosthesis. Also disclosed is the process for making the prosthesis and spacer, which preferably involves injection molding of PMMA.
Claims19
A prosthesis comprising:
- an elongated base element with a proximal end and a distal end for insertion into a bone canal;
- and
- a spacer member secured to the base element with a circumferential portion at least partially surrounding the proximal end of said base element, said circumferential portion having a distal edge, said spacer member further having at least two separate legs, each of said legs extending distally from the distal edge of said circumferential portion along the base element, said legs tapering to a reduced thickness and width in the distal direction wherein the spacer member allows for improved pressurization and aligning of the prosthesis within the bone canal.
A prosthesis comprising:
- a base element with a proximal and distal end for insertion into a bone canal;
- a spacer member bonded to the base element comprising a circumferential portion which surrounds the proximal end of said base element, said circumferential portion having a distal edge;
- and
- a medial leg and two lateral legs each joined to said circumferential portion of said spacer member at said distal edge and extending distally wherein the spacer member allows for improved pressurization and aligning of the prosthesis within the bone canal.
1 more element
Dependencies are inferred from the claim text.