Abstract: In a shell for adapting a retention element to an anchoring element, and a method of forming a further retention element on an anchoring element including a shell, the shell has an internal cavity, the dimensions of which are matched to the external dimensions of the retention element and which is connectable to the retention element in an integral or form-fitting manner, and has an outer surface which is formed as a further retention element.

Abstract: A system and method for quantitatively assessing a press fit value (and provide a mechanism to evaluate optimal quantitative values) of any implant/bone interface regardless the variables involved including bone site preparation, material properties of bone and implant, implant geometry and coefficient of friction of the implant-bone interface without requiring a visual positional assessment of a depth of insertion. The following description is presented to enable one of ordinary skill in the art to make and use the invention and is provided in the context of a patent application and its requirements.

Abstract: An orthopaedic components, prostheses, and methods for a hip arthroplasty are disclosed. The acetabular prosthetic component includes an outer rim and a cavity defined by an inner wall. The cavity is sized to receive a femoral head of a femoral prosthetic component. The inner wall includes a curved surface extending inwardly from the outer rim to an inner end, and a semi-spherical surface connected to the inner end of the curved surfac. The inner wall is shaped to resist dislocation of the femoral head component from the cavity and permit the femoral head component to articulate over a range of motion.

Abstract: Implants, device, systems and methods for replacing an articulation surface in a joint, for example, a reverse glenoid implant with a baseplate, a central screw, a peripheral screw, a modular taper, and a post. Methods for implanting the glenoid implant are also disclosed.

Abstract: A veterinary hip resurfacing prosthetic system includes a femoral cap and an acetabular cup. The cup shell has a thickness of less than 2 mm and a liner in the shell has a thickness of less than 2.5 mm in order to accommodate a larger femoral cap. Further included are features for preventing rotation of the liner relative to the shell, for releasably locking the liner in the shell, and for accessing the liner to remove it from the shell.

Abstract: A prosthesis according to the present disclosure includes a shell. A liner is disposed within the shell, and a femoral head may be disposed within the liner. A locking mechanism may assist in securing the liner within the shell. The locking mechanism may be removed when the shell, liner, and femoral head are implanted. The shell extends beyond a hemisphere of the shell, and the liner extends beyond a hemisphere of the liner.

Abstract: A two piece humeral component for use in joint arthroplasty which is adapted to be implanted into a joint and engaged by a socket component of the joint. The joint component includes a body having a first articulating surface and a second medial surface opposite the first articulating surface. The first articulating surface is adapted to be engaged by the socket and the second medial surface is adapted to be secured to mounting portion. The mounting portion has a first surface and a second medial surface. The first surface is adapted to be fixably engaged to the second mounting portion of the humeral component. The second medial surface is adapted to be secured to the humerus. A peg which has a first end adapted to engage a cavity found in the humerus is disposed on the mounting portion's second medial surface.

Abstract: The present invention relates to methods for making oxidation resistant medical devices that comprise polymeric materials, for example, ultra-high molecular weight polyethylene (UHMWPE). The invention also provides methods of making antioxidant-doped medical implants, for example, doping of medical devices containing cross-linked UHMWPE with vitamin E by diffusion and materials used therein.

Abstract: The present invention provides monopolar acetabular liners (32, 54) that can enclose a femoral head (14) to form a hip replacement prosthesis (30, 50), wherein the liner (32, 54) has a rim (34) that creates an orifice, wherein the orifice has a diameter that is smaller than the diameter of the femoral head (14), and wherein the liner (32, 54) encompasses greater than 50 percent of the volume of the head (14), wherein a constraining ring (56) can be used in conjunction with the monopolar constrained acetabular liner (32, 54) to provide additional support for the femoral head (14) to stay with the acetabular liner (32, 54) and avoid dislocation. Assemblies and complete prosthetic replacements are also provided. Liners (32, 54) and constraining rings (56) having no, one or more recesses (36) also are provided.

Abstract: A prosthetic hip implant system includes a prosthetic femoral component having a stem portion, a neck portion coupled to the stem portion and a part-spherical head coupled to the neck portion. An acetabular component is provided which has a housing, the housing having a part-spherical inner surface having an open end with a circumferential rim portion. The rim portion has a circumferential radially inwardly extending flange. A bearing element is mounted within the housing and has a part-spherical first outer surface region engaging the part-spherical inner surface of the housing. The part-spherical first outer surface region extends at a first radius from a center. The bearing element has a second part-spherical outer surface region extending a distance from the center less than the first radius to form a stop surface for contacting the rim.

Abstract: A prosthetic hip implant system includes a prosthetic femoral component having a stem portion, a neck portion coupled to the stem portion and a part-spherical head coupled to the neck portion. An acetabular component is provided which has a housing, the housing having a part-spherical inner surface having an open end with a circumferential rim portion. The rim portion has a circumferential radially inwardly extending flange. A bearing element is mounted within the housing and has a part-spherical first outer surface region engaging the part-spherical inner surface of the housing. The part-spherical first outer surface region extends at a first radius from a center. The bearing element has a second part-spherical outer surface region extending a distance from the center less than the first radius to form a stop surface for contacting the rim.

Abstract: A two piece humeral component for use in joint arthroplasty which is adapted to be implanted into a joint and engaged by a socket component of the joint. The joint component includes a body having a first articulating surface and a second medial surface opposite the first articulating surface. The first articulating surface is adapted to be engaged by the socket and the second medial surface is adapted to be secured to mounting portion. The mounting portion has a first surface and a second medial surface. The first surface is adapted to be fixably engaged to the second mounting portion of the humeral component. The second medial surface is adapted to be secured to the humerus. A peg which has a first end adapted to engage a cavity found in the humerus is disposed on the mounting portion's second medial surface.

Abstract: Medical implants exhibiting optimized mechanical properties, and methods of making such implants, are disclosed. That is, the implants are fabricated of a porous metal substrate and include coating integrated over various areas so as to provide some added or desirable property or functionality to the implant. In one embodiment, the implant is an acetabular implant with a coating applied to an internal, concave wear surface which is sized and configured to receive a head of a femur. Typically, the coating is a ceramic incorporated onto the desired area of the implant via electrophoretic deposition.

Abstract: A prosthetic hip implant system includes a prosthetic femoral component having a stem portion, a neck portion coupled to the stem portion and a part-spherical head coupled to the neck portion. An acetabular component is provided which has a housing, the housing having a part-spherical inner surface having an open end with a circumferential rim portion. The rim portion has a circumferential radially inwardly extending flange. A bearing element is mounted within the housing and has a part-spherical first outer surface region engaging the part-spherical inner surface of the housing. The part-spherical first outer surface region extends at a first radius from a center. The bearing element has a second part-spherical outer surface region extending a distance from the center less than the first radius to form a stop surface for contacting the rim.

Abstract: A prosthesis has prosthetic components principally comprising metallic materials, in which a portion of an articular interface between respective components is a metallic-nonmetallic interface. At least a portion of the articular surface of a femoral head may include a ceramic material defining an articulation zone, such as at a polar region of the femoral head, so that the ceramic articulates with a metallic acetabular liner. The area covered by the ceramic may be engineered to optimize the contact conditions between the femoral head and the acetabular liner, such as by providing two clearances therebetween. A relatively smaller, polar articulation clearance is defined by the gap between the ceramic coating and the metallic acetabular liner. A relatively larger, equatorial non-articulation clearance between the femoral head and the acetabular liner is defined by the gap between the portion of the femoral head not covered by the ceramic coating.

Abstract: A method for removing a bearing that is coupled to a prosthetic implant by a ring includes advancing a distal end of a removal tool in a first direction and into a slit formed in the ring. The ring can be caused to expand radially from engagement with the bearing. The distal end of the removal tool can be advanced in a second direction such that the removal tool engages the bearing. The distal end of the removal tool can be further advanced in the second direction such that the removal tool urges the bearing away from the prosthetic implant.

Abstract: The present invention relates to methods for making oxidation resistant medical devices that comprise polymeric materials, for example, ultra-high molecular weight polyethylene (UHMWPE). The invention also provides methods of making antioxidant-doped medical implants, for example, doping of medical devices containing cross-linked UHMWPE with vitamin E by diffusion and materials used therein.

Abstract: A prosthetic joint assembly that includes a shell including an inner surface. The assembly also includes a bearing member including an outer surface. The bearing member is received by the shell such that the outer surface of the bearing member is adjacent the inner surface of the shell. Furthermore, the joint assembly includes a compressible member that is rigidly fixed to the inner surface of the shell or the outer surface of the bearing member to only cover a portion thereof. The compressible member is made of a material that is different from the shell or the bearing member.

Abstract: A system for replacing a portion of a shoulder joint can include a tray having an outer surface and an inner surface. The outer surface can be adapted to engage a humeral stem. A bearing can include an outer bearing surface and an inner articulating surface. The outer bearing surface can be positioned adjacent to the tray. A ring can be selectively disposed between the tray and the bearing. The ring can define an annular body having a slit formed therein. The ring can be movable between a locked position wherein the ring retains the bearing relative to the tray and an unlocked position. A removal tool can define a proximal end and a distal end. The distal end can define a ring engaging surface and a bearing engaging surface. The ring engaging surface can be adapted to engage the ring at the slit such that the ring expands radially from the locked position away from engagement with the bearing to the unlocked position.

Abstract: The present invention relates to methods for making oxidation resistant medical devices that comprise polymeric materials, for example, ultra-high molecular weight polyethylene (UHMWPE). The invention also provides methods of making antioxidant-doped medical implants, for example, doping of medical devices containing cross-linked UHMWPE with vitamin E by diffusion and materials used therein.

Abstract: An acetabular prosthesis and method for its use in an orthopedic surgery is disclosed. The acetabular prosthesis forms a metal bearing, which articulates with a femoral head. The acetabular prosthesis is also configured so as to accept a polymer constraining ring. Should a revision surgery be necessary, the acetabular prosthesis may accept a polymer bearing liner over the metal bearing. The polymer bearing liner then articulates with the femoral head.

Abstract: A composition, a medical implant constructed from the composition, and a method of making the composition are described. The composition is a composite material, comprising a porous, reticulated, open cell network having at least part of its surface coated with blue-black or black oxidized zirconium.

Abstract: A set is provided for creating an offset-resurfacing hip-joint implant. The set includes a 1 to 1.5 mm thick metallic acetabulum shell (1) for insertion into the natural acetabulum, from which only cartilage has been removed, a metallic head cap (2) for placement on the natural hip-joint head, from which only cartilage has been removed, and an inlay (3) for insertion into the acetabulum shell (1) as a sliding partner for the head cap (2). The inlay has a material thickness of 2 to 5 mm. The head cap (2) has a wall thickness which increases constantly from a thickness of 2 mm to 6 mm viewed in cross section in the region of the base edge (6) of the head cap, so that an eccentricity is produced in its outer shape.

Abstract: An orthopedic prosthesis for implantation into a bone of a patient can include a shell, an augment and a securing member. The shell can be adapted to be affixed within the bone and have an outer surface adapted to receive bone ingrowth after implantation. The shell can have an inner surface adapted to engage a liner. An elongated slot can extend between the outer and inner surfaces of the shell. The augment can define a body and have a passage therethrough. The securing member can extend through the passage and the slot. The securing member can be movable between a locked position wherein the augment is precluded from relative movement with the shell and an unlocked position wherein the securing member is adapted to slidably traverse along the slot to locate the augment at a plurality of positions relative to the shell.

Abstract: A prosthetic joint in which at least one bearing component is made from solid diamond.

Abstract: A prosthetic ball and socket joint comprising a ceramic on ceramic articulation surface and a resilient bone interface coupling component.

Abstract: A prosthetic component is configured to have intentional interruptions in an articulating face thereof. The intentional interruptions are configured to yield an optimum contact area or bearing surface, particularly with regard to low wear and greater lubricity through the application of lubrication and contact mechanics theory for the particular prosthetic component. Such optimization is applied to a wide range of prosthetic component sizes of the particular prosthetic component. The optimum range of percentage area of relief or interruptions, defined as a percentage of a baseline uninterrupted bearing surface area to be removed by the features of the interrupted bearing surface configuration is from 0.3% to 73.7% for hard-on-hard bearing components and from 5.7% to 83.2% for polyethylene-on-hard bearing components. The range for both hard-on-hard and polyethylene-on-hard implants translates to a relieved area ranging from 0.3% to 31.

Abstract: The present invention is related to an artificial hip joint prosthesis. Also, it can be decreased the time of medical treatment and administered medicine easily. Besides, it can be applied an Oriental having small pelvis.

Abstract: A constraining modular hip prosthetic to reduce the possibility of a dislocation of the hip prosthetic after implantation. The constraining liner is provided in a preassembled position including an opening smaller than the internal diameter of the liner. The modular head portion includes a equator diameter which is small enough to be received into the liner. It includes a second dimension which is greater than the opening to constrain the modular head within the liner. A kit is also provided for trialing the modular hip prosthetic to provide and determine a customized and personal fit of the hip prosthetic for each patient.

Abstract: Bipolar prostheses which include various structures and other techniques for optimizing material wear and mechanical strength properties. Such prostheses feature, for example, improved resistance to polyethylene wear while also reducing potential for dislocation of the femoral stem from the prosthesis. Such techniques and structures include varying wear resistance and mechanical strength treatment in various components of the prostheses or portions of those components as desired to improve, accentuate or optimize wear performance and dislocation reduction, locking ring structural features, structures for retaining locking rings in the bipolar prosthesis shell, and structures for limiting or reducing movement or rotation of locking rings and liners in bipolar prosthesis shells.

Abstract: An artificial hip joint assembly comprising a femoral component with a stem for being anchored in the medullary space of a femur and a head on the distal end of the stem, an acetabular component for being anchored in the pelvic bone with an acetabular cup which pivotedly supports the head of the femoral component, and an articular capsule made of a flexible material, which is located at the femoral component at one end and at the acetabular component at the other end so as to allow the head to move in the acetabular cup and to prevent wear debris from the bearing zone of the head in the acetabular cup from migrating to the outside.

Abstract: One or more rigid components associated with an articulating bone are used to encase, encapsulate, contain, or otherwise protect a compressible/resilient member. The embodiments are applicable not only to artificial disc replacement (ADR) devices, but also to joint situations including total knee and hip arthroplasty. The cushion elements in the preferred embodiments include synthetic rubbers, hydrogels, elastomers, and other polymeric materials such as viscoelastic polymers and foam polyurethanes. The invention effectively combines the advantages of such materials (cushioning, shape memory, and expansion after insertion in the case of hydrogels), while providing increased protection, particularly the elimination of shear stresses. When applied to an ADR, the invention also minimizes the risk of extrusion.

Abstract: A prosthetic device having at least part of its surface comprising a diffusion-hardened, in-situ formed oxidation or nitridation layer and with at least another part of its surface comprising a coating of bioceramic, preferably hydroxyapatite. The bone in-growth and on-growth promoting bioceramic further works synergistically with the diffusion-hardened surface in realizing a longer service life prosthetic.

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 prosthetic component is configured to have intentional interruptions in an articulating face thereof. The intentional interruptions are configured to yield an optimum contact area or bearing surface, particularly with regard to low wear and greater lubricity through the application of lubrication and contact mechanics theory for the particular prosthetic component. Such optimization is applied to a wide range of prosthetic component sizes of the particular prosthetic component. The optimum range of percentage area of relief or interruptions, defined as a percentage of a baseline uninterrupted bearing surface area to be removed by the features of the interrupted bearing surface configuration is from 0.3% to 73.7% for hard-on-hard bearing components and from 5.7% to 83.2% for polyethylene-on-hard bearing components. The range for both hard-on-hard and polyethylene-on-hard implants translates to a relieved area ranging from 0.3% to 31.

Abstract: Orthopedic implants which includes the components of zirconium or zirconium-based alloys having surfaces coated with oxidized zirconium or alternatively, other orthopedic implants comprising abrasion resistant surfaces contacting surfaces of cross-linked polyethylene are disclosed. Such implants provide low friction, highly wear resistant coatings especially useful in artificial joints, such as hip joints, knee joints, elbows, etc., but also useful in other implant devices as well.

Abstract: The present invention provides monopolar acetabular liners that can hold a femoral head to form a hip replacement prostheses, wherein the liner has a rim that creates and orifice, and wherein the orifice has a diameter that is smaller than the diameter of the femoral head, and wherein there is an outset between the rim of the liner and the center line of the femoral head when the femoral head is disposed therein. Assemblies, complete prosthetic replacements, and methods of replacing also are provided.

Abstract: Acetabular insert comprising a spherical head arranged at one end of a medullary stem and mounted with articulation inside a core, which is itself mounted with articulation inside an acetabular component. The spherical head is made of zirconia and the core comprises an inner cup consisting of an alumina cup on which is immobilized a polyethylene cup overmolded on the alumina cup. In addition, the spherical head is configured so as to be able to be engaged without stress in the cup and be retained directly and exclusively by the latter.

Abstract: A joint prosthesis assembly includes a stem for disposition in a canal of a first bone constituting a first portion of the joint, a neck fixed to the stem, a collar fixed on the neck and having a peripheral groove, and an articulating head fixed on the neck. The assembly further includes a cup for disposition in a second bone constituting a second portion of the joint, an insert disposed in the cup to provide an interior lining for the cup, the insert being configured to receive the articulating head for movement therein, and the insert having a peripheral groove therein. A sleeve-shaped membrane is provided with a first O-ring fixed thereto at a first end thereof for disposition in the insert groove, and a second O-ring fixed thereto at a second end thereof for disposition in the collar groove. The membrane is thereby disposed to capture particulate debris generated by the articulating head in the insert. There is further contemplated a method for installing the assembly.

Abstract: A joint replacement prosthesis is disclosed. The prosthesis has a conical base and a hemispherical or part hemispherical top providing a hemispherical or part hemispherical replacement bearing surface. The prosthesis is shaped and sized to have a wedge fit in a conical recess formed in the head or neck of a human femur or humerus without removal of all of the neck of the femur or humerus.

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: 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: A prosthesis for replacement of a ball and socket joint in the human body. The prosthetic components comprise a plurality of separate parts which may be inserted through a hole in the femur of the patient and assembled and attached to the prepared acetabulum of the hip bone to form a cup-shaped first shell. A cup is also passed through the hole in the femur and attached to the first shell to form the socket portion of the joint. A shaft having a first end with a ball formed thereon is inserted in the hole through the femur so that the ball engages the cup for movement therein.

Abstract: A movable joint has a first portion and a second portion and at least a deposition of chromium material forming an interface between the first and second portions. The first portion has an outer surface. The second portion also has an outer surface. The deposition of chromium material forms an interface between the outer surface of the first portion and the outer surface of the second portion.

Abstract: A hip joint prostheses including an acetabular cup (2) mounted in the hip socket (4) of the pelvis (6) is disclosed. The prosthesis also includes a head (8) which has a radius of curvature complementary to the cavity in the acetabular cup (2). The head (8) is typically made of metal. A neck (10) is connected to the head (8) joining the head (8) to the stem (12). The head (8), and the acetabular cup (2) are designed to allow a great deal of angular articulation. The bearing portions can be made with radiation treated ultrahigh molecular weight polyethylene polymer having substantially no detectable free radicals.

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.