University of Utah Research Foundation

Other

Harrington Arthritis Research Center

Brigham Young University

Wright Medical Technology, Inc.

Roy Drake Bloebaum

Kent Nelson Bachus

Brian Holt

Sujee Jeyapalina

James Peter Beck

Erik Noble Kubiak

Jayant P Agarwal

Joseph A Longo

Frank P Magee

Paul B Savage

Marc Evan Richelsoph

Dustin Williams

Richard E Jones

Raymond E Olsen

Kenneth William Russell

Thomas P Murray

Kristofer D Sinclair

Efrain Frank Algarin

Bryan S Haymond

Brian Mueller Holt

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.

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

An improvised anthroplastic prosthetic implant having, in some embodiments, secondary screws with threaded shafts for forming pilot holes into the resected cancellous bone surface, such as the tibia, and primary screws with tapered heads for replacing the secondary screws and forming a Morse friction fit with the implant and seating the implant in close apposition to, and at less than 150 um in, resected bone thereby facilitating implant stability, wherein the heads of the primary screws are recessed into a counterbore in the baseplate to improve axial postoperative stability of the implant.

Osteolysis-resistant cementless joint implant with improved stability and seating function

An abutment system for operatively coupling an implant stem to an exo-prosthesis. The abutment system includes a plurality of interlocking sleeve elements that are operatively coupled to an implant stem positioned within a prepared site of a selected bone. The interlocking sleeve elements of the abutment system are selectively removable and replaceable.

Modular prosthetic abutment system

An implant system for securing a prosthesis to a selected bone of a subject including a stem and an abutment. The stem includes a porous region that promotes osseointegration of the selected bone following implantation of the stem. The abutment is secured to the stem and is configured for secure attachment to the prosthesis. The stem and the abutment include ultra-low friction and/or highly polished surfaces at select locations that inhibit bio-adhesion.

Percutaneous osseointegrated prosthetic implant system

A medical device that includes a coating of a composite material that includes a polymeric material having a void structure and particulate ceragenin material (i.e., ceragenin particles) associated with the void structure. The average particle size of the ceragenin particles in the composite is in a range from 5 nm to 20 &#x3bc;m, 50 nm to 10 &#x3bc;m, 100 nm to 5 &#x39e;m, or 1 &#x3bc;m to 10 &#x3bc;m. The composite has a high loading of ceragenin particles (e.g., about 10% to about 25%, by weight). The composite has good polymer stability, the ability to release ceragenins from the ceragenin particles disposed in the composite over a sustained period of time at a characteristic elution rate, and the ability to kill large numbers of bacteria and other susceptible microbes over the sustained period of time.

Medical devices incorporating ceragenin-containing composites

An antimicrobial containment cap is provided for use in a bone anchored prosthesis mounting system of the type having an externally protruding fixator pin carried by all implanted bone anchored mounting post, wherein the fixator pin accommodates removable attachment to an exoskeletal prosthesis such as a prosthetic limb or the like for an amputee. The containment cap, when mounted onto the fixator pin, is interposed between the prosthesis and soft tissue covering the end or stump of an amputated residual limb or the like. The containment cap carries and supports a selected antimicrobial or antibacterial agent in substantial contact with the soft stump tissue in a position closely overlying and substantially circumscribing the tissue interface with the externally protruding fixator pin to safeguard against infection. The containment cap is adapted for quick and easy periodic removal for cleaning and/or replenishment of the antimicrobial agent.

Antimicrobial containment cap for a bone anchored prosthesis mounting

A prosthetic joint and related placement method are provided for cemented fixation to a prepared patient bone, with a cement layer and mantle of controlled, predetermined thickness. The prosthetic component such as a tibial or femoral component for a knee prosthesis includes an attachment surface bounded by a flow restrictor wall which cooperates with the attachment surface to define an open-sided cavity for receiving a quantity of bone cement. An intruder tool is provided to form a shallow recess in the prepared patient bone for mating seated reception of the flow restrictor wall on the prosthetic component. In one form, the prosthetic component and the intruder tool may be adjustable to fit patient bones of different size.

Cemented prosthetic component and placement method

A long bone prosthesis (10) includes a neck portion (12), a stem portion (16) and an intermediate portion (20) disposed between the neck portion (12) and stem portion (16). The intermediate portion (20) includes seals for containing cement thereabout under pressure adjacent thereto and preventing leaking of cement therefrom during implantation of the prosthesis (10).

Dual fixation prosthesis

A prosthetic joint component and related placement method are provided for cemented fixation to a prepared patient bone, with a cement layer and mantle of controlled, predetermined thickness. The prosthetic component, such as a tibial or femoral component for a knee prosthesis, includes an attachment surface with a plurality of spacer pegs protruding therefrom, and bounded by a taller flow restrictor wall which cooperates with the shorter spacer pegs and attachment surface to define an open-sided cavity for receiving a quantity of bone cement. An intruder tool is provided to form a shallow recess in the prepared patient bone for seated reception of the flow restrictor wall on the prosthetic component. The cement cavity of the prosthetic component is filled with bone cement to a height slightly above the spacer pegs and below the flow restrictor wall, whereupon the prosthetic component is placed onto the patient bone with the flow restrictor wall seated within the recess and the spacer pegs contacting the patient bone. During placement of the prosthetic component, the flow restrictor wall prevents lateral escape of the bone cement, resulting in a cement layer and mantle of selected thickness to achieve a substantially optimum strength attachment interface, while preventing cement breakdown at the cement implant interface.

An improved tibial component is provided for a knee prosthesis, wherein the tibial component includes a pair of tibial tray members adapted to accommodate independent longitudinal shifting during patient function while retaining a secure and stable fixation with respect to patient bone. The two tibial tray members comprise medial and lateral members for supporting the medial and laternal condyles of a knee joint. These tray members are interconnected by a slide key arrangement which restrains the tibial tray members against relative movement in the anterior-posterior and medial-lateral directions, while permitting relative shifting in a longitudinal direction corresponding generally with a central axis of the patient's tibia. In the preferred form, the two tibial tray members cooperatively define a common anchoring post and include one or more antirotation fins for mechanically locking with patient bone. In addition, in the preferred form, the two tray members include appropriate bone ingrowth surfaces for secure noncemented attachment to patient bone.

Tibial component for a knee prosthesis

A physiologically conforming solution for use in invasive medical procedures which is hypertonic with respect to blood serum and may, in fact, have a higher osmolality than synovial fluid. The solution is of particular utility as an irrigant in arthroscopic surgery in order to reduce the risk of swelling and injury of the synovial tissues and as a therapeutic treatment for swelling and subsequent inflammation of joints and soft tissue which occurs in certain traumatized and pathological states.

Growing community of inventors

Salt Lake City, UT, United States of America

Roy Drake Bloebaum