Abstract: The invention discloses a process for fabricating a biomaterial, comprising: a) joining a porous collagen based-material with a non-porous collagen based-material by applying a controlled amount of a bonding layer of a gel comprising collagen to a bonding surface of the non-porous collagen based-material, and contacting a surface of the porous collagen based-material with the gel applied to the bonding surface to partially hydrate a section of the porous material at the interface between the materials; b) drying the gel to dry to bond the materials together; and c) cross-linking the collagens in the bonding layer. Also disclosed are biomaterials and implants produced using the fabrication process.

Abstract: The invention discloses a process for fabricating a biomaterial, comprising: a) joining a porous collagen based-material with a non-porous collagen based-material by applying a controlled amount of a bonding layer of a gel comprising collagen to a bonding surface of the non-porous collagen based-material, and contacting a surface of the porous collagen based-material with the gel applied to the bonding surface to partially hydrate a section of the porous material at the interface between the materials; b) drying the gel to dry to bond the materials together; and c) cross-linking the collagens in the bonding layer. Also disclosed are biomaterials and implants produced using the fabrication process.

Abstract: An inserter for locating and impacting an acetabular cup which has an inner bearing surface in a prepared acetabulum. The inserter has a handle carrying an anvil, an impaction head adapted to receive the cup and a retention system for attaching the cup to the inserter. The retention system extends between an actuator in the handle and the impaction head. The actuator is operable to free the retention system from the cup by impacting the anvil.

Abstract: An inserter for locating and impacting an acetabular cup which has an inner bearing surface in a prepared acetabulum. The inserter has a handle carrying an anvil, an impaction head adapted to receive the cup and a retention system for attaching the cup to the inserter. The retention system extends between an actuator in the handle and the impaction head. The actuator is operable to free the retention system from the cup by impacting the anvil.

Abstract: A bone measurement device is used to measure the adequacy of the distance between a cavity in the head and neck of a femur and the outer surface of the neck of the proximal femur. A coupling element is fixedly attached to an outer surface of a femoral head. An arm extends from the coupling element and a bone measurement device having an adjustable bone contacting element thereon is coupled to the arm. An adjustable coupler is provided for moving the bone measurement device in a generally proximal-distal direction. The bone contacting element is mounted on the adjustable coupler for movement in a direction transverse to the proximal-distal direction into contact with bone when the coupling element is attached to the femoral head. The adjustable coupler for moving the bone measurement device in a proximal-distal direction and the adjustable bone contacting element are calibrated with distance markings. The markings correspond to sizes of femoral implants for implantation in the cavity.

Abstract: An apparatus for preparing a head portion of a proximal femur has a drill guide support having a cylindrical bore therein for engaging the head of a femur. The support has a central axis for coaxial alignment with a central axis of a neck of a proximal femur. A drill guide is mounted on a proximal end of the drill guide support, the drill guide having a first drill guide portion extending along an axis co-axial with the central axis of the base portion and a second drill portion extending along an axis forming an acute angle with the first drill portion central axis. A bone thickness indicator is mounted on the drill guide and is moveable towards and away from a neck of the femur along an axis forming an angle with the central axis of the drill guide support.

Abstract: A prosthetic bearing element and a method for forming the same includes an injection molded bearing made of PEEK resin with short carbon fiber reinforcement. The inner surface of the PEEK bearing is adapted to receive a ceramic or metal articulation component. The outer surface of the bearing layer includes sputtered titanium particles forming a porous backing layer. Hydroxyapatite is then sputtered or otherwise deposited onto the titanium backing layer to form an outer surface of the prosthetic bearing element. A barrier layer can be formed either of PEEK or titanium which layer is between the outer surface of the molded bearing and the inner surface of the porous structure. The barrier layer prevents tissue ingrowth into the bearing component. Hydroxyapatite is then sputtered onto the outer porous layer or applied by solution deposition. This outer surface of the prosthetic bearing element can then be coated with bone morphogenic protein.

Abstract: The present invention is intended to provide a cementless prosthetic bearing element which has been molded and which is possible to place in an acetabular socket without cement, the outer surface of the backing being provided with elements to assist stabilization and the ingrowth of bone. Thus, the bearing element is cheaper and easier to produce and provides superior location and installation in the bone. According to the present invention a cementless prosthetic bearing element comprises a backing which supports a bearing liner having a bearing surface, the backing being molded from a rigid polymeric material and said bearing liner being made from elastomeric polyurethane material to which the backing is molded with an outer surface which includes a number of raised engagement features provided in directions extending away from and/or towards the outer periphery of the outer surface.

Abstract: A prosthetic femoral component is located in a prepared socket in a femur which has been resected at a position on the proximal side of its neck. The component includes an insert portion and an enlarged proximal head portion the distal end of the head portion being adapted for location in the prepared socket. The component takes advantage of the bone at the periphery of the socket which enables the insert and the part of the head concerned to be accurately and firmly located in the bone. The presence of the bone at the outer edges of the socket helps to stabilize the component. The insert portion can be dimensioned to pass through the neck of the femur with which it is to be used or to be shorter depending upon the requirements.

Abstract: A prosthetic femoral component is located in a prepared socket in a femur which has been resected at a position on the proximal side of its neck and Includes a tapered insert and a proximal head portion. The proximal end of the insert portion is adapted for location in the prepared socket and has a maximum dimension in a plane normal to the distal-proximal axis of the neck which is larger than the minimum dimension of the neck in a parallel plane. The component takes advantage of the bone at the periphery of the socket which enables the insert to be accurately and firmly located in the bone. The presence of the bone at the outer edges of the socket helps to stabilize the component. Preferably the tapered insert portion is flared outwardly in the proximal direction. The tapered insert portion can be dimensioned to pass through the neck of the femur with which it is to be used or it can stop short of it.

Abstract: The present invention is intended to provide a cementless prosthetic bearing element which has been molded and which is possible to place in an acetabular socket without cement, the outer surface of the backing being provided with elements to assist stabilization and the ingrowth of bone. Thus, the bearing element is cheaper and easier to produce and provides superior location and installation in the bone. According to the present invention a cementless prosthetic bearing element comprises a backing which supports a bearing liner having a bearing surface, the backing being molded from a rigid polymeric material and said bearing liner being made from elastomeric polyurethane material to which the backing is molded with an outer surface which includes a number of raised engagement features provided in directions extending away from and/or towards the outer periphery of the outer surface.

Abstract: A prosthetic femoral component is located in a prepared socket in a femur which has been resected at a position on the proximal side of its neck and includes a tapered insert and a proximal head portion. The proximal end of the insert portion is adapted for location in the prepared socket and has a maximum dimension in a plane normal to the distal-proximal axis of the neck which is larger than the minimum dimension of the neck in a parallel plane. The component takes advantage of the bone at the periphery of the socket which enables the insert to be accurately and firmly located in the bone. The presence of the bone at the outer edges of the socket helps to stabilize the component. Preferably the tapered insert portion is flared outwardly in the proximal direction. The tapered insert portion can be dimensioned to pass through the neck of the femur with which it is to be used or it can stop short of it.

Abstract: A prosthetic femoral component is located in a prepared socket in a femur which has been resected at a position on the proximal side of its neck. The component includes an insert portion and an enlarged proximal head portion the distal end of the head portion being adapted for location in the prepared socket. The component takes advantage of the bone at the periphery of the socket which enables the insert and the part of the head concerned to be accurately and firmly located in the bone. The presence of the bone at the outer edges of the socket helps to stabilize the component. The insert portion can be dimensioned to pass through the neck of the femur with which it is to be used or to be shorter depending upon the requirements.

Abstract: An acetabular cup for a total hip prosthesis has an outer shell and an inner bearing component. The shell is molded around the inner bearing component and has an elastic modulus similar to subchondral bone of between 5 GPa and 18 GPa. The shell has a part-spherical main portion and two independent arms projecting from the part-spherical main portion. The arms are separated from each other by an opening of predetermined shape and size.