US 9,433,505 B2Granted

Percutaneous osseointegrated implant assembly for use in supporting an exo-prosthesis

OwnerKent N. Bachus, Sujee Jeyapalina +6inventors

InventorsKent N. Bachus, Sujee Jeyapalina, James Peter Beck, Roy Bloebaum, Jayant P. Agarwal, Joseph A. Longo, Erik Kubiak, Brian Mueller Holt

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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.

Claims17

Dependent claims

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 at a proximal end of the subdermal component that is adapted for attachment to the distal end of the stem, wherein the proximal portion comprises a porous structure forming a fixation surface that is adapted to promote soft tissue fixation, the subdermal component further comprising a distal portion having low energy surface that is adapted to inhibit bioadhesion;
(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 surface 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.

3 more elements

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;
(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 at a proximal end of the subdermal component that is adapted for attachment to the distal end of the stem, wherein said proximal portion comprises a porous structure forming a fixation surface that is adapted to promote soft tissue fixation;
(ii) a distal portion having a distal end, wherein the distal portion comprises a low energy surface that is adapted to inhibit bio-adhesion;
(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.

15 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/181,029Filed 14 Feb 2014 · continuation in part
Priority: 6 Jun 2011
Published: US 2014/0156022 A110 Jul 2014
Granted: 6 Sep 2016
Term ends: Not estimatedThe source records don’t support an estimate.

Classification15 codes

A61F 2/2814
Bones: bone stump caps
A61F 2/78
Prostheses not implantable in the body: means for protecting prostheses or for attaching them to the body, e.g. bandages, harnesses, straps or…
A61F 2002/0091
For hindering or preventing attachment of biological tissue: having cellular growth inhibitors
A61F 2002/30028
The prosthesis being made from materials having different values of a given property at different locations within the same prosthesis: differing…

Family

Application61/493,914Us provisional application · filed 6 Jun 2011
Application61/594,815Us provisional application · filed 3 Feb 2012
Application61/622,783Us provisional application · filed 11 Apr 2012
PCT/US2012/041112Parent of this continuation-in-part · filed 6 Jun 2012
US 2014/0195002 A1Pre-grant publication · published 10 Jul 2014
Application14/123,719Parent of this continuation-in-part
US 2014/0156022 A1Published application
US 9,668,889 B2Related patent
US 9,433,505 B2This patent

From the US filing history. Foreign family members aren’t listed.

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