Abstract: A trial liner for use in a hip arthroplasty surgical procedure is disclosed. The trial liner includes a rim and a semi-hemispherical body attached to the rim. The semi-hemispherical body includes a concave inner wall extending inwardly from the rim to define a cavity, a convex outer wall extending from the rim opposite the inner wall, and an interior wall extending between the inner wall and the outer wall and defining an opening at an apex of the semi-hemispherical body. The semi-hemispherical body is adapted to deflect and modify the opening, when pressed against a head of a screw, to accept the head of the screw within the opening. A system that includes the trial liner and the screw, and a method for using the system in a surgical procedure, are also disclosed.

Abstract: An implantable medical device for implantation in a hip joint is provided. The medical device comprises: at least one artificial hip joint surface adapted to replace at least the surface of at least one of the caput femur and acetabulum. At least one artificial hip joint surface comprises: a positioning hole with at least one opening in said at least one artificial hip joint surface. The hole is adapted to be placed and dimensioned such that the medical device is adapted to be fitted using a positioning shaft and at least partly surround the shaft, for positioning the at least one artificial hip joint surface in a desired position in the hip joint. The hole is adapted to be fitted using the positioning shaft, when the shaft is stabilized and placed in at least one of the femoral bone and the pelvic bone for positioning said medical device inside the hip joint.

Abstract: An acetabular shell for use in hip arthroplasty. The shell includes a first wall having an outer surface, an inner surface, and a rim. The shell further includes a second wall extending from the outer surface of the first wall. The second wall has an outer surface, an inner surface, and a rim. The rim of the second wall is spaced outwardly from the rim of the first wall.

Abstract: A humerus implant includes a cup shaped body and a locking adapter. The cup shaped body has a center portion and a plurality of flexible first sidewall segments and second sidewall segments, with gaps between neighbored sidewall segments. The first sidewall segments have a plurality of locking fins while the second sidewall segments having a plurality of recesses and holes. The locking adapter has means for fixing the locking adapter to the cup shaped body and a locking ring for locking the sidewall segments into their final positions.

Abstract: Systems and methods for fabrication of implantable medical devices using an Electron Beam Melting (EBM) manufacturing process are provided. According to one embodiment, an EBM manufacturing system is caused to perform a fabrication process that results in an implantable medical device of unitary construction having a solid volume and a porous volume. A layer of metal powder is spread across a build platform of the EBM manufacturing system. Portions of the layer of metal powder are selectively heated in accordance each portion's association with the solid volume or the porous volume by scanning the layer of metal powder with an electron beam of the EBM manufacturing system and adjusting a power of the electron beam and a speed of said scanning. The build platform is lowered based on a predetermined layer thickness and the process of continues on a layer-by-layer basis until the implantable medical device is completed.

Abstract: Method and apparatus for limiting absorption of food products in specific parts of the digestive system is presented. A gastrointestinal implant device is anchored in the stomach and extends beyond the ligament of Treitz. All food exiting the stomach is funneled through the device. The gastrointestinal device includes an anchor for anchoring the device to the stomach and a flexible sleeve to limit absorption of nutrients in the duodenum. The anchor is collapsible for endoscopic delivery and removal.

Abstract: An acetabular implant for use in a hip joint prosthesis is disclosed. The implant includes a body portion comprising a polycarbonate polyurethane. The body portion includes a substantially semispherical inner articulating surface defining a socket sized to receive a head portion of a femoral component of the hip joint prosthesis and an outer engagement surface having an annular protrusion extending outwardly therefrom. The annular protrusion is configured for snap-fit engagement with a corresponding recess in the acetabulum. The implant also includes a deformation control element having an increased durometer hardness relative to the polycarbonate polyurethane and positioned within the body portion between the inner articulating surface and the outer engagement surface.

Abstract: A modular acetabular cup assembly (10, 100, 200, 300, 350) for use with multiple bearing liners (32, 110, 212, 310, 354) is disclosed. The acetabular cup assembly includes a shell (12) having a tapered inner wall (28) and two circumferential grooves (24, 26). The shell (12) may be used with polyethylene, ceramic, metal, and other types of liners.

Abstract: An artificial hip cup design having an external groove for accepting a split ring or segmented split rings with knife shaped edges and specially designed set screws which expand the split ring's outer diameter. After the cup is placed in the socket of the pelvic bone, it can be readjusted, if necessary, and then locked in final position.

Abstract: An acetabular cup assembly for use in the replacement of a hip joint, including a shell having a substantially hemispherical outer surface and an inner surface. The inner surface includes a groove extending at least partially around the inner surface. A provisional liner is provided which is receivable within the shell, the liner including a hemispherical cavity and articulation surface for receipt of the femoral head of a femoral prosthesis, and at least one flexible tab portion which engages the groove of the shell in a snap-fit manner.

Abstract: An acetabular prosthesis assembly can include an acetabular cup and a first liner. The acetabular cup can have an outer surface to contact a subject and an inner surface to engage the first liner. The first liner can have an outer cup engaging surface that couples with the acetabular cup in an assembled position.

Abstract: An acetabular implant for hip replacement surgery includes a shell component and first and second alternative bearing components interchangeably engageable with the shell component to provide a choice in bearing components. The shell component has a shell component engagement mechanism suitable for engaging the first alternative bearing component. A conversion ring is also engageable with the shell component, so that a shell component/conversion ring assembly provides a second shell component engagement mechanism suitable for engagement with the second alternative bearing component.

Abstract: An acetabular cup and sheath assembly comprises a sheath and an acetabular cup. The sheath is configured to receive the acetabular cup within the sheath. The sheath and acetabular cup together are configured to pass through a surgical wound toward an implantation site. The sheath further comprises a penetration structure for passing the acetabular cup through the sheath when the acetabular cup is proximately close to an implantation site.

Abstract: An acetabular implant for hip replacement surgery includes a shell component and first and second alternative bearing components interchangeably engageable with the shell component to provide a choice in bearing materials. The shell component has an engagement mechanism suitable for locking engagement with the first alternative shell component. A conversion ring is lockingly engageable with the shell component to adapt the shell component to provide an engagement mechanism suitable for locking engagement with the second alternative shell component.

Abstract: A prosthetic element including a cap made of metal material. At least part of the cap is a lattice that makes a plurality of open and intercommunicating cavities.

Abstract: An acetabular implant for use in a hip joint prosthesis is disclosed. The implant includes a body portion comprising a polycarbonate polyurethane. The body portion includes a substantially semispherical inner articulating surface defining a socket sized to receive a head portion of a femoral component of the hip joint prosthesis and an outer engagement surface having an annular protrusion extending outwardly therefrom. The annular protrusion is configured for snap-fit engagement with a corresponding recess in the acetabulum. The implant also includes a deformation control element comprising a polyethylene having an increased durometer hardness relative to the polycarbonate polyurethane and positioned entirely within the body portion between the inner articulating surface and the outer engagement surface.

Abstract: The invention relates to an expandable acetabular cup (46) which is designed to eliminate the difficulties associated with positioning in the acetabulum of the patient. The inventive device comprises a hemispherical acetabular cup (46) which is partially slotted at six points to facilitate the expansion of a core with conical fitting. The expandable acetabular cup (46) is designed such that it can be introduced freely, or with slight pressure, into a preformed bone cavity. The conical core (16) is designed to be fixed to a guide/impacteur graduated in degrees to maximize the desired position. The implantation is performed gradually. The inclination and anteversion can be checked at all times during the implantation. The retaining mechanism of the guide/impacteur can be used to remove the conical core (16) to re-position the acetabular cup (46) if necessary.

Abstract: A prefabricated joint is employed for the prosthetic joint. The joint includes prefabricated socket, ball, and capsule. The capsule is attached from the ball to the socket. The capsule seals the area between the ball and socket and prevents wear debris from entering the body cavity. In the case of the hip joint, the doctor need only attach the prefabricated unit to the femoral unit to connect the prosthetic joint after the prefabricated unit and femoral unit have been placed into the acetabular and femur, respectively.

Abstract: A joint prosthesis comprising at least a first and a second load carrying member, the first load carrying member being substantially more shock absorbing and resilient than the second load carrying member.

Abstract: The invention provides an acetabular prosthesis (1) comprising:

Abstract: An improved constrained socket for use with an orthopedic implant for replacing a ball-and-socket joint. The constrained socket includes cuts extending from the opening of the socket generally toward the articular region thereof. Petals are formed between adjacent cuts in the socket. The socket further includes an annular expansion cutout, with the aforementioned cuts terminating therein. The socket does not include cuts on the primary articular surface, but nevertheless has a relatively low assembly force to allow assembly of the ball-and-socket joint during a surgical procedure. The relatively low assembly force of the constrained socket of the current disclosure is due in part to the annular expansion cutout which allows sufficient outward flexure of the petals to allow insertion of the ball of the ball-and-socket joint.

Abstract: An articulating prosthesis includes a cup having a shell and a liner and at least one resilient locking element. The shell has a spherical outer surface that may be adapted to articulate with an acetabulum and the liner has a spherical inner surface that forms an articulation surface for the spherical head of a stem member. The resilient locking member extends inward toward a longitudinal axis of the cup and at least partially in a superior direction. The resilient locking element defines a nominal first diameter expandable to a larger second diameter in response to a force and is returnable to the first diameter in the absence of the force for securing the head of a stem prosthesis member.