Universal modular prosthesis stem extension
First Claim
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1. A modular prosthesis system comprising:
- a) a prosthetic head having an undersurface;
b) head mounting means on said undersurface;
c) a stem extension having stem mounting means for mounting said stem extension to said head mounting means in any one of a plurality of orientations with respect thereto;
d) said stem extension having a stem portion, connected to said stem mounting means and defining an obtuse angular relationship therebetween.
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Abstract
Disclosed is an improved universal modular prosthetic stem extension which may be installed on a prosthesis in a multiplicity of differing orientations to allow adaptation to a multiplicity of differing patient conditions. The stem includes a coupling mechanism allowing the stem to be rotated to any one of a multiplicity of rotative positions with respect to a prosthetic base, whereupon the stem may be tightened and fixed in position at a desired such orientation. The inventive stem extension is disclosed in conjunction with embodiments of distal femoral, proximal tibial, and proximal femoral prostheses.
348 Citations
29 Claims
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1. A modular prosthesis system comprising:
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a) a prosthetic head having an undersurface; b) head mounting means on said undersurface; c) a stem extension having stem mounting means for mounting said stem extension to said head mounting means in any one of a plurality of orientations with respect thereto; d) said stem extension having a stem portion, connected to said stem mounting means and defining an obtuse angular relationship therebetween. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A method of performing surgery including the steps of:
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(a) providing a modular prosthesis system comprising; (i) a prosthetic head having an undersurface; (ii) head mounting means on said undersurface; (iii) a stem extension having stem mounting means for mounting and locking said stem extension to said head mounting means in any one of a plurality of orientations with respect thereto; (iv) said stem extension having a stem portion connected to said stem mounting means and defining an obtuse angular relationship therebetween; (v) said prosthetic head and stem extension combining to comprise a prosthesis; (b) surgically preparing a bone to accept said prosthetic head and stem extension; (c) adjusting the orientation of said stem extension with respect to said prosthetic head to render said prosthesis compatible with said surgically prepared bone; (d) locking said orientation between said stem extension and said prosthetic head; and (e) surgically fastening said prosthesis to said bone. - View Dependent Claims (24, 25, 26, 27, 28, 29)
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Specification