Other

Biomedical Engineering Trust I

Biomedical Engineering Corp.

Falcon Safety Products Incorporated

Biomedical Engineering Trust

Detex Corporation

Buechel-pappas Trust

Michael J Pappas

Frederick F Buechel

Paul A Witte

Christopher N Severud, Jr

John B Fenning

Thomas Johnson

Fredrick F Buechel

David C Hoffman

Frederick Arthur Waldman

LED display ceiling mount

The tibial component of a prosthetic ankle joint including a tibial component, a talar component, and an intermediate sliding plastic bearing, with the tibial component including a depending peripheral wall that surrounds and is spaced from the plastic bearing and is intended to reduce rubbing of the plastic bearing against tissue which would produce wear particles that lead to the formation of bone cysts. The depending peripheral wall of the tibial component is intended to reduce such possible abrasions by at least partially shielding the plastic bearing from the surrounding tissue.

Ankle prosthesis including tibial component having peripheral wall for preventing the formation of bone cysts

A knee prosthesis includes a femoral component, a tibial component, a bearing and a control arm. The bearing is in articular bearing engagement with the femoral component and in sliding and rotational bearing engagement with the tibial component. Movement of the bearing relative to the tibial component is controlled by a control arm. The anterior extreme of the control arm includes a removable stop for limiting anterior movement of the bearing relative to the tibial component.

Prosthetic knee with removable stop pin for limiting anterior sliding movement of bearing

A knee prosthesis includes a femoral component, a tibial component, a bearing and a control arm. The bearing is in articular bearing engagement with the femoral component and in sliding and rotational bearing engagement with the tibial component. Movement of the bearing relative to the tibial component is controlled by a control arm. Anterior and posterior extremes of the control arm include stops for limiting anterior and posterior movement of the bearing relative to the tibial component. At least one of the stops is removable relative to the control arm to facilitate implantation.

A knee joint prosthesis includes femoral and tibial components, a bearing and a control arm. The bearing includes an inferior surface in sliding bearing engagement with the tibial component and a superior surface in articular bearing engagement with the femoral component. A notch extends into the posterior end of the bearing and a groove extends anteriorly from the notch in the inferior surface of the bearing. The posterior portions of the femoral component define a cam box having medial and lateral walls and a cam extending therebetween. The control arm is slidably engaged in the groove of the bearing and pivotally engage on the tibial component. The control arm further includes a post that extends into the cam box. The post includes a cam surface that engages the femoral cam to generate roll back of the femoral component on the bearing during flexion.

Deep flexion posterior stabilized knee replacement with bearing translation

A knee joint prosthesis includes femoral and tibial components, a bearing and a control arm. The bearing includes an inferior surface in sliding bearing engagement with the tibial component and a superior surface in articular bearing engagement with the femoral component. A notch extends into the posterior end of the bearing and a groove extends anteriorly from the notch in the inferior surface of the bearing. The posterior portions of the femoral component define a cam box having medial and lateral walls and a cam extending therebetween. The control arm is slidably engaged in the groove of the bearing and pivotally engage on the tibial component. The control arm further includes a post that extends into the cam box. The post includes a cam surface that engages the femoral cam to generate roll back of the femoral component on the bearing during flexion. Roll back substantially avoids climb of the femoral component on the bearing during flexion and hence reduces shearing forces on the post.

Posterior stabilized knee replacement with bearing translation for knees with retained collateral ligaments

A physical vapor deposition apparatus and process are provided for providing a highly smooth shiny coating to a substrate. The apparatus includes a chamber with a fixture for mounting the components to be coated. The fixture is arranged such that the surfaces to be coated define a &ldquo;dark side&rdquo; that faces away from the source of ion bombardment. With this arrangement, heavier multiple ions will travel past the surface to be coated. Lighter single ions will be drawn more readily to the oppositely charged surface to be coated, and hence will undergo a non-linear travel path for deposition onto the component.

Apparatus and method for coating prosthetic components

A prosthetic replacement knee joint includes a tibial component, a femoral component, a bearing and a control arm. The tibial component has a superior bearing surface and a conical recess extending into the superior bearing surface. The bearing has an inferior surface slidably engaged with the superior surface of the tibial component and formed with a dovetailed groove therein. The bearing also has a concave superior surface. A notch extends into the posterior extreme of the bearing. The femoral component has a pair of convex arcuate condyles in articular bearing engagement with the superior surface of the bearing. The femoral component also includes a posterior notch having a minor medial-lateral width at the inferior surface of the femoral component and a major width at more superior locations on the femoral component. The control arm has a conical bearing rotatable positioned in the conical recess of the tibial component. The control arm further has a dovetail guide slidably engaged in the dovetail groove of the bearing. A post projects through the notch in the bearing and into the notch of the femoral component. The post has medial and lateral projections that engage portions of the notch in the femoral component that define the major width thereof.

Posterior stabilized prosthetic knee replacement with bearing translation and dislocation prevention features

A set of instruments ( ) is provided for use in the preparation of a natural bone of a condylar joint for receiving prosthetic components both in primary and revision surgery. To illustrate the invention and use thereof, reference is made to the preparation of a natural femur (F) in a knee joint. The set of instruments ( ) includes an anterior-posterior femoral resection guide ( ) having a guide aperture ( ) formed therethrough, and a set of collets ( A; B) formed to detachably mount to the guide aperture ( ). The set of collets ( A; B) includes a drill guide ( ), a reamer sleeve ( ), and a plurality of different size reamer bushings ( A; B). Accordingly, the drill guide ( ) can be mounted to the anterior-posterior femoral resection guide ( ) to provide guidance in the drilling of a channel ( ) into the distal end of a femur (F), and, alternatively, the combination of the reamer sleeve ( ) and the reamer bushings ( A; B) can be used to provide guidance in reaming a channel into the distal end of a femur (F). As an additional feature, a tibial template ( ) is also provided which can be cooperatively used with the reamer sleeve ( ) and reamer bushings ( A; B) to prepare a channel into a natural tibia (T).

Anterior-posterior femoral resection guide with set of detachable collets

A knee joint prosthesis is provided. The prosthesis includes a femoral component for mounting to the distal end of a femur, a tibial component for mounting to the resected proximal end of the tibia and a bearing disposed between the femoral and tibial components. The tibial component includes a superior bearing surface with a recess extending distally into the bearing surface. The bearing includes an inferior bearing surface for engagement on the superior bearing surface of the tibial component. Additionally, the bearing includes a projection that is rotatably engaged in the recess of the tibial component. Rotation of the bearing relative to the tibial component is limited by a stop extending from the superior bearing surface of the tibial component. The stop is engaged in a slot formed in the inferior surface of the bearing. The slot is concentric about the rotational axis and extends through an arc consistent with the desired maximum range of rotation. Engagement of the stop in the slot limits rotation and prevents spinout of the knee prosthesis.

Knee joint prosthesis with spinout prevention

A tibia fixturing device comprises a metal tray formed with annularly spaced recesses in its underside at a depth of at least about 1.5 mm and from which a stem depends for axial insertion into a tibia conical cavity. The stem has a circular cylindrical portion proximal the tray and a conical portion distal the tray. Fins radially extend from the stem cylindrical portion and penetrate the tibia to provide some torsional resistance. Axially extending channels are formed about the stem periphery which channels have bottom surfaces parallel to the stem axis to provide further torsional resistance. The channels are arranged to not interlock with the cement in the axial direction to permit the cement to separate first from the device during axial removal of the device from the bone. The fins have inclined edges distal the tray and inclined radial outer edges to align and center the stem to the bone cavity edge. Cement in the tray recesses bonds the tray to a tibia resected surface to provide major torsional resistance of the tray about the cavity longitudinal axis.

Prosthesis fixturing device

The prosthetic knee joint is provided for resisting valgus-varus movements. The joint includes a femoral component having a superior bone engaging surface and an inferior bearing surface. A posterior notch extends anteriorly into the posterior end of the femoral component. The prosthetic knee joint further includes a tibial component having an inferior bone engaging surface and a superior bearing surface. A plastic bearing is disposed between the femoral and tibial components. An inferior surface of the plastic bearing is in bearing engagement with the superior surface of the tibial component. A superior bearing surface of the plastic bearing is in articular bearing engagement with the bearing surface of the femoral component. The bearing includes a post projecting proximally from the superior surface. The post is slidably received in the posterior notch of the femoral component and resists valgus-varus moments imposed upon the joint. The post may include medial and lateral cam projections spaced from the superior bearing surface of the bearing. The femoral component may include flanges at the posterior notch for engagement between the cam projections and the superior bearing surface to substantially prevent dislocation.

Prosthetic knee joint with enhanced posterior stabilization and dislocation prevention features

A femoral component of a knee prosthesis includes a bearing surface defined by a smooth, continuous surface which in one embodiment is entirely formed by a series of three segments of surfaces of revolution, the respective shapes of which are generated by rotating a common generating curve around three separate generating axes at respective pairs of major generating radii and through respective angles of rotation. The central segment of the surfaces of revolution constantly maintains the substantially same contact configuration with the superior bearing surface of a bearing insert over a range extending from full extension (0.degree. of flexion) to at least 45.degree. of flexion and up to 105.degree. of flexion. The maintenance of the substantially same contact configuration ensures area, point or line contact between the articulating surfaces which reduces contact stress and wear in flexion. In a second embodiment, the bearing surface is defined by four segments of surfaces of revolution shaped for implantation in a knee where one or both cruciate ligaments are retained.

Femoral component for knee endoprosthesis

A temporomandibular joint prosthesis is provided. The prosthesis includes the condyle component for attachment to the ramus of a temporomandibular joint to replace the natural condylar head. The condyle component is attached to the natural ramus by a fixation system that may include plasma-sprayed pegs or plasma-sprayed double screws. The prosthesis further includes a fossa component assembly having a metallic bone attachment member and a plastic bearing. The plastic bearing is disposed and configured for articular bearing engagement with the condyle component of the prosthesis.

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Caldwell, NJ, United States of America

Michael J Pappas