PERCUTANEOUS OSSEOINTEGRATED IMPLANT ASSEMBLY FOR USE IN SUPPORTING AN EXO-PROSTHESIS
First Claim
1. An implant assembly for a long bone having a longitudinal axis, which assembly is adapted to support an exo-prosthesis, said assembly comprising:
- (a) a stem having;
(i) a proximal end that is adapted to be received in a surgically prepared medullary canal of the long bone;
(ii) a distal end having a surface that is adapted to promote bone ingrowth;
(b) a subdermal component having a proximal portion that is adapted for attachment to the distal end of the stem and a fixation surface that is adapted to promote soft tissue fixation;
(c) a percutaneous post having a proximal end that is adapted to be attached to the subdermal component.wherein at least one of the distal end of the stem and the proximal portion of the subdermal component defines a collar that is adapted to engage an osteotomy created by a cut through the long bone that is generally perpendicular to the longitudinal axis of the long bone.
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Accused Products
Abstract
An implant assembly for a long bone is adapted to support an exo-prosthesis. The assembly includes a stem, a subdermal component and a percutaneous post. The stem has a proximal end that is adapted to be received in a surgically prepared medullary canal of the long bone, and a distal end having a surface that is adapted to promote bone ingrowth. The subdermal component includes a proximal portion that is adapted for attachment to the distal end of the stem, and a fixation surface that is adapted to promote soft tissue fixation. The percutaneous post has a proximal end that is adapted to be attached to the subdermal component.
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Citations
18 Claims
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1. An implant assembly for a long bone having a longitudinal axis, which assembly is adapted to support an exo-prosthesis, said assembly comprising:
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(a) a stem having; (i) a proximal end that is adapted to be received in a surgically prepared medullary canal of the long bone; (ii) a distal end having a surface that is adapted to promote bone ingrowth; (b) a subdermal component having a proximal portion that is adapted for attachment to the distal end of the stem and a fixation surface that is adapted to promote soft tissue fixation; (c) a percutaneous post having a proximal end that is adapted to be attached to the subdermal component. wherein at least one of the distal end of the stem and the proximal portion of the subdermal component defines a collar that is adapted to engage an osteotomy created by a cut through the long bone that is generally perpendicular to the longitudinal axis of the long bone. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. An implant assembly for a long bone having a longitudinal axis, which assembly is adapted to support an exo-prosthesis, said assembly comprising:
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(a) a stem having; (i) a proximal end that is adapted to be received in a surgically prepared medullary canal of the long bone; (ii) a distal end having a surface that is adapted to promote bone ingrowth; (iii) a threaded bore in the distal end; (b) a subdermal component that is adapted for attachment to the distal end of the stem, said subdermal component comprising; (i) a proximal portion that is adapted for attachment to the distal end of the stem, said proximal portion having a low energy surface that is adapted to inhibit bio-adhesion; (ii) a distal portion having a distal end and a fixation surface that is adapted to promote soft tissue fixation; (iii) an intermediate portion between the distal portion and the proximal portion, said intermediate portion having a transition surface between the low energy surface and the fixation surface; (v) a tapered central bore; (c) a percutaneous post that is adapted for attachment to the distal end of the subdermal component, said percutaneous post comprising; (i) a proximal end that is tapered and adapted to be received in the tapered central bore of the subdermal component; (ii) a distal end that is provided with a threaded bore; (iii) a central bore having a proximal portion of a first diameter and a distal portion of a second diameter, wherein the second diameter is larger than the first diameter; (d) an adapter having a central bore that is adapted to receive the distal end of the percutaneous post; (e) an assembly bolt comprising; (i) a proximal portion with a threaded proximal end, said proximal portion having a proximal diameter that is adapted to be received in the proximal portion of the central bore of the percutaneous post and said threaded proximal end being adapted to engage the threaded bore in the distal end of the stem; (ii) a distal portion having a distal end and a distal diameter that is adapted to be received in the distal portion of the central bore of the percutaneous post; (f) an adapter bolt that is threaded to engage the threaded bore in the distal end of the percutaneous post.
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Specification