Biopro, Inc.

Biodynamics LLC

Charles O Townley

Kurt C Frisch

Aisa Sendijarevic

Allan Vegell

Daniel G Eaby

Basal thumb joint implant has a head with a smooth, generally hemispherical, medio-proximally directed, articulating surface, and a generally abrupt, distally directed, truncation thereto; and a stem attached to the head, which arises from the truncation of the head and includes at least one of the following features:

Basal thumb joint implant

Modular basal thumb joint implant

Prosthetic joint replacement ensemble includes an artificial joint implant component having a non-bone-interfacing rough surface for ingrowth of fibrous tissue, preferably about a peripheral boundary. The component can be made of metal, and have the rough surface provided by porous metal coating. When the prosthesis is implanted, the extramedullary rough surface engenders ingrowth of soft fibrous tissue so that it forms, as it were, a reconstituted capsular &ldquo;bag&rdquo; in which wear debris from the joint, for example, ultra high molecular weight polyethylene wear debris, is trapped, thus keeping those particles from gaining access to supporting bone at the bone-prosthetic interface. And so, with mitigation of wear debris dispersion, debris wear-induced osteolysis can be ameliorated.

Joint implant having porous coating for mitigation of wear debris dispersion when implanted

A joint implant, which is not itself a femoral component for a conventional hip joint replacement prosthesis having a diamond or diamond like coated ball, has a diamond or diamond like coated articulating surface. The coating can be transitional in nature. The implant can be based on a suitable support material, for example, a metal, a ceramic, or a plastic, with the support material being coated with the diamond or diamond like substance. The implant may be, for instance, for a ginglymous type, an enarthrodial type, or a digital joint. Convex and/or concave articulating surface(s) of a prosthesis can have the coating.

Diamond coated joint implant

An article of manufacture for load bearing medical use such as a joint implant suitable for total joint replacement. The article comprises a polyurethane-containing component and is monolithic with respect to polyurethane-containing component(s). The joint for long term load applications is structurally an articulated joint and the polyurethane component provides a surface for articulation with the polyurethane.

Polyurethane and so forth containing joints

A hip joint socket implant for total hip replacement, can contain a modified surface configuration of its cement-fixable outer wall having small, widely dispersed cement spacer elevation members. The implant has a unique snap-fitted arrangement of the head-restraining marginal outlet of the acetabular component with posterior and anterior cut outs of the implant to avoid premature impingement against a prosthetic femoral neck, allowing a normal, non-dislocating range of unobstructed external and internal rotation of the hip, and a hood that is a marginally extended continuation of the superior one-half or so of the cup containment that is of a sufficient magnitude to reduce the overall dimension of the socket outlet to less than a hemisphere, which is especially pertinent to a conventional hip replacement acetabular cup prosthesis.

Snap-fitting, non-dislocating hip joint socket implant

An enarthrodial type joint socket implant, for example, for total hip replacement, can contain a modified surface configuration of its cement-fixable outer wall having small, widely dispersed cement spacer elevation members, for example, rectangularly-oriented cement spacer elevation members in block form with dove tailed configurations, which are sufficiently high to provide an appropriately thick cement mantle to assure an optimally proficient implant-stabilizing cement mantle which is universally consistent and technically routine to implant. It can, in addition or independently, have, and this is especially pertinent to conventional hip replacement acetabular cup prostheses, a unique snap-fitted arrangement of the head-restraining marginal outlet of the acetabular component having posterior and anterior cut outs of the implant to avoid premature impingement against a prosthetic femoral neck, allowing a normal, non-dislocating range of unobstructed external and internal rotation of the hip, and a hood that is a marginally extended continuation of the superior one-half or so of the cup containment that is of a sufficient magnitude to reduce the overall dimension of the socket outlet to less than a hemisphere. The implant can be suitably adapted for use in other enarthrodial type joints such as the shoulder.

Enarthrodial type joint socket implant

Modular ball and socket joint has 1) a cupped ball head, preferably of ceramic, having a support body with an inferior, deep, distally facing, preferably generally planar, surface having a substantially circular outer boundary thereto; a distally opening stem receiving bore preferably centrally located in the support body; a cup wall, extending distally from the support body and having a preferably substantially cylindrical inner surface which extends from said outer boundary of said distally facing surface; and a superficially facing, generally semispherical, smooth external surface, preferably and optimally of a low friction coefficient, encapsulating the support body and cup wall; and 2) an interchangable and modular stem, preferably of metal or metal alloy, having a distally directed spike, and a superior stem cap which is insertable into the bore of the head; optionally with 3) a head-receiving articular cup having an inner articular surface and a mountable back surface, the articular surface of which, when the head-receiving cup is suitably mounted in suitable receiving stock, mates in articulating contact with said smooth external surface of said head when said head and stem are suitably mounted in suitable receiving stock. The head and stem modularity allows for noticeably increased versatility and efficiency in surgical procedures, and the ceramic material is beneficially adapted for employment in the fabrication of femoral resurfacing implants for conservative arthroplasty.

Modular ball and socket joint preferably with a ceramic head ball

A hip joint prosthesis consisting of an artificial femur head and an artificial acetabular socket. The femur head includes a ball head which is received in the acetabular socket, a neck connecting the ball head to a platform and an arcuate stem which is T-shaped in cross section and extends from the platform for insertion into the medullar cavity in a femur. A recess located on the lateral portion of the platform and several steps located along the medial portion of the stem are further provided to securely anchor the prosthesis when it is cemented into the medullar cavity.

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Port Huron, MI, United States of America

Charles O Townley