Abstract: An orthopaedic knee implant includes a femoral component having a substrate and a coating disposed on the surface of the substrate. A method for making a femoral component of an orthopaedic knee implant is also disclosed.

Abstract: In one embodiment a method of implanting a prosthetic includes implanting a first member including a concave articulation surface portion defined by a first radius of curvature in a first bone, implanting in a second bone a second member including a first convex articulation surface portion defined by a second radius of curvature and a second convex articulation surface defined by a third radius of curvature, wherein the second convex articulation surface is defined by the lemon portion of a spindle torus and each of the second radius of curvature and the third radius of curvature has a length that is different from the length of the first radius of curvature by less than 0.05 millimeters and wherein the origin of the second radius of curvature is not coincident with the origin of the third radius of curvature, and bringing the first member into slidable contact with the second member.

Abstract: In one embodiment a method of implanting a prosthetic includes implanting a first member including a concave articulation surface portion defined by a first radius of curvature in a first bone, implanting in a second bone a second member including a first convex articulation surface portion defined by a second radius of curvature and a second convex articulation surface defined by a third radius of curvature, wherein the second convex articulation surface is defined by the lemon portion of a spindle torus and each of the second radius of curvature and the third radius of curvature has a length that is different from the length of the first radius of curvature by less than 0.

Abstract: A prosthetic ball for use in a ball and cup joint system includes a spherical cap articulation portion defined by a first radius of curvature, and a toroidal articulation portion defined by a second radius of curvature having a circular origin such that the toroidal articulation portion is defined by a portion of the inner surface of a spindle torus.

Abstract: A prosthetic ball for use in a ball and cup joint system includes a spherical cap articulation portion defined by a first radius of curvature, and a toroidal articulation portion defined by a second radius of curvature having a circular origin such that the toroidal articulation portion is defined by a portion of the inner surface of a spindle torus.

Abstract: A joint prosthesis device comprises a head configured to fit within a cup. The cup includes a concave cup surface defined by at least one radius of curvature RC. The head includes a convex head surface defined by at least one radius of curvature RH. The convex head surface is configured to engage the concave cup surface. The convex head surface provides an articulation zone where the head surface engages the cup surface. RC differs from RH in the articulation zone by a first amount. The convex head surface also provide a peripheral zone outside of the articulation zone. RC differs from RH in the peripheral zone by a second amount that is greater than the first amount. The peripheral zone generally extends over an area subtended by a minimum angle having a vertex at a center of the head.

Abstract: A joint prosthesis device comprises a head configured to fit within a cup and in one embodiment includes a first member for attachment to a first bone in a joint and including a first articulation surface portion defined by a first radius of curvature and a second member for attachment to a second bone in the joint and including a second articulation surface portion defined by a second radius of curvature and a third articulation surface defined by a third radius of curvature, wherein each of the second radius of curvature and the third radius of curvature has a length that is different from the length of the first radius of curvature by less than 0.05 millimeters and wherein the origin of the second radius of curvature is not coincident with the origin of the third radius of curvature.

Abstract: A joint prosthesis device comprises a head configured to fit within a cup and in one embodiment includes a first member for attachment to a first bone in a joint and including a first articulation surface portion defined by a first radius of curvature and a second member for attachment to a second bone in the joint and including a second articulation surface portion defined by a second radius of curvature and a third articulation surface defined by a third radius of curvature, wherein each of the second radius of curvature and the third radius of curvature has a length that is different from the length of the first radius of curvature by less than 0.05 millimeters and wherein the origin of the second radius of curvature is not coincident with the origin of the third radius of curvature.

Abstract: A joint prosthesis device comprises a head configured to fit within a cup and in one embodiment includes a first member for attachment to a first bone in a joint and including a first articulation surface portion defined by a first radius of curvature and a second member for attachment to a second bone in the joint and including a second articulation surface portion defined by a second radius of curvature and a third articulation surface defined by a third radius of curvature, wherein each of the second radius of curvature and the third radius of curvature has a length that is different from the length of the first radius of curvature by less than 0.05 millimeters and wherein the origin of the second radius of curvature is not coincident with the origin of the third radius of curvature.

Abstract: A method of reducing the surface roughness of articulating surfaces of orthopaedic implants is provided. The method includes the steps of providing an abrasive particle providing a chemical including at least one of an oxidant, a corrosion inhibitor, a complexing agent and a surfactant, combining the chemical with the abrasive particle to form a slurry, and polishing the implant with the slurry.

Abstract: A joint prosthesis device comprises a head configured to fit within a cup and in one embodiment includes a first member for attachment to a first bone in a joint and including a first articulation surface portion defined by a first radius of curvature and a second member for attachment to a second bone in the joint and including a second articulation surface portion defined by a second radius of curvature and a third articulation surface defined by a third radius of curvature, wherein each of the second radius of curvature and the third radius of curvature has a length that is different from the length of the first radius of curvature by less than 0.05 millimeters and wherein the origin of the second radius of curvature is not coincident with the origin of the third radius of curvature.

Abstract: A joint prosthesis device comprises a head configured to fit within a cup. The cup includes a concave cup surface defined by at least one radius of curvature RC. The head includes a convex head surface defined by at least one radius of curvature RH. The convex head surface is configured to engage the concave cup surface. The convex head surface provides an articulation zone where the head surface engages the cup surface. RC differs from RH in the articulation zone by a first amount. The convex head surface also provide a peripheral zone outside of the articulation zone. RC differs from RH in the peripheral zone by a second amount that is greater than the first amount. The peripheral zone generally extends over an area subtended by a minimum angle having a vertex at a center of the head.

Abstract: A method of reducing the surface roughness of articulating surfaces of orthopaedic implants is provided. The method includes the steps of providing an abrasive particle providing a chemical including at least one of an oxidant, a corrosion inhibitor, a complexing agent and a surfactant, combining the chemical with the abrasive particle to form a slurry, and polishing the implant with the slurry.

Abstract: A pressure sensor for an internal combustion engine cylinder. The sensor has a housing with a pair of ends and a bore that extends through the housing. A barrel is mounted in the bore toward one end. The barrel has a cavity. A piezoelectric body is mounted in the cavity. The piezoelectric body has a first and second electrode. The piezoelectric body generates an electrical signal that is indicative of the pressure in the cylinder. A plate is mounted adjacent the barrel. The plate retains the barrel in the housing. An electronic circuit is mounted in the bore toward the other end. The electronic circuit is electrically connected to the electrodes. The electronic circuit receives the electrical signal from the electrodes and provides a conditioned electrical signal as an output.

Abstract: A pressure sensor for an internal combustion engine cylinder. The sensor has a housing with a pair of ends and a bore that extends through the housing. A barrel is mounted in the bore toward one end. The barrel has a cavity. A piezoelectric body is mounted in the cavity. The piezoelectric body has a first and second electrode. The piezoelectric body generates an electrical signal that is indicative of the pressure in the cylinder. A plate is mounted adjacent the barrel. The plate retains the barrel in the housing. An electronic circuit is mounted in the bore toward the other end. The electronic circuit is electrically connected to the electrodes. The electronic circuit receives the electrical signal from the electrodes and provides a conditioned electrical signal as an output.

Abstract: A conductive layer (13) adhesively joined to an electrically inert substrate (10) by an organic binder component. The organic binder consists of a resin not substantially less than 15% nor more than about 35% by weight of the composition which further includes dispersed metallic material within the binder and forming the electrically conductive component of the solderable material. A solderable surface layer (15) of the conductive layer (13) includes exposed metallic material suitable for solder bonding terminations (16) to the conductive layer (13), such solderable surface layer (15) being adhesively joined to the binder by means of the organic matrix.