Abstract: A hip-joint prosthesis includes a shaft which is configured to be inserted into the femur and whose surface has an osteoinductive finish. This finish is provided exclusively in the metaphyseal portion of the shaft and laterally from the line delineating the maximum antero-posterior dimension of the shaft cross section. This ensures a better involvement of the metaphyseal spongiosa in the flow of forces, without compromising the ability to perform follow-up surgery on the prosthesis.

Abstract: A external femoral component for mechanically housing onto exterior remnant of natural femur and coupling with articulation elements in order to use in total hip arthroplasty defines as a hollow shell comprised of asymmetrically bell shaped cup, at least one rigid elongated stem downwardly extended from the lower rim of the cup and a plurality of an cylindrical object upwardly protruded from top of the cup for pairing with articulation elements and coupling with anchoring means and the tension anchoring means fixes the hollow shell on the bone surface through an interlocking mechanisms.

Abstract: A prosthesis includes a trunnion having a first end defining a uniform cross-section and a second end adapted to be fixed to a prosthesis stem. A ceramic head has a first bearing surface on which a second prosthesis fixed to a second bone can articulate. The ceramic head defines a recess. The first end of the trunnion is fixedly received within the recess. The second end of the trunnion is releasably connectable to the prosthesis stem by a taper connection.

Abstract: A prosthetic femoral implant has a stem having a proximal end and a distal end. A circumferential collar is formed on the proximal end of the stem having a proximally facing surface in the form of a circular disc extending radially inwardly and proximally from a maximum outer circumference to a central neck region. The collar has a distally facing surface extending radially inwardly and distally at an included angle with respect to a central longitudinal axis of the neck region of between 120 and 140°. The distal surface of the collar is v-shaped and may be conical in form.

Abstract: A coating of blue-black or black oxidized zirconium of uniform and controlled thickness on a zirconium or zirconium alloy material is accomplished through the oxidative treatment of an amorphous zirconium or zirconium alloy substrate having an altered surface roughness. An oxidized zirconium coating of uniform and controlled thickness is especially useful on orthopedic implants of zirconium or zirconium-based alloys to provide low friction, highly wear resistant surfaces on artificial joints, such as, but not limited to, hip joints, knee joints, shoulders, elbows, and spinal implants. The uniformly thick oxidized zirconium surface of controlled depth on prostheses provide a barrier against implant corrosion caused by ionization of the metal prostheses. The invention is also useful in non-articulating implant devices such as bone plates, bone screws, etc.

Abstract: One embodiment of the present invention is a unique prosthetic implant and method for making a prosthetic implant. Other embodiments include apparatuses, systems, devices, hardware, methods, and combinations for prosthetic implants. Further embodiments, forms, features, aspects, benefits, and advantages of the present application shall become apparent from the description and figures provided herewith.

Abstract: A modular prosthesis that may be implanted in a highly minimally invasive manner. Specifically, the modular prosthesis may include a neck and an anchor. Both the neck and the anchor are configured to be inserted and connected together through a lateral aspect of a long bone adjacent to the proximal end of the long bone. In one exemplary embodiment, the neck includes a body having a head end, configured for attachment to another prosthetic component, such as a corresponding articulating component, and an aperture extending therethrough. The anchor may be sized for receipt within the aperture formed in the neck. Additionally, the anchor may be configured such that the anchor engages the walls forming the aperture in the neck to secure the components together.

Abstract: A temporary femoral implant system has a porous mold and a femoral component. The system fits at least partially in a femoral cavity. The mold has a wall with an interior surface and an exterior surface forming an interior space for receiving an antibiotic bone cement. The mold allows the antibiotic to diffuse through the wall to the exterior surface. The femoral component has a stem portion received within the mold. A method of using the implant system includes providing an implant system comprising a mold and a femoral component, inserting the mold into the femoral cavity with the exterior surface facing the femoral cavity, inserting the stem portion of a femoral component into the interior space of the mold and filling the interior space of the mold with an antibiotic bone cement.

Abstract: Position reference members are provided as part of an orthopaedic implant system. Both position reference members can be implanted on or in the same bone as the other parts of the implant. One of the position reference members is fixed to the bone and the other position reference member is movable with another part of the implant, such as a stem received in the intramedullary canal. The movable position reference member can move with respect to the fixed position reference member. At least one of the position reference members includes indicia such as a main scale or a vernier scale. Parts of the indicia and position reference members are radio-opaque and parts are radiolucent. Post-operative changes in the relative positions of the position reference members can be measured by radiography or fluoroscopy so that changes in the implant position can be monitored over time.

Abstract: A method of selecting a patient matched hip joint prosthesis includes identifying a plurality of first parameters of a hip joint anatomy of the patient. The method also includes selecting a standard modular neck member from a set of different standard modular neck members to substantially match the first parameters of the hip joint anatomy of the patient. Moreover, the method includes performing a hip joint mechanical analysis using the selected standard modular neck member. Further, the method includes choosing for implantation either the selected modular neck member, a different standard modular neck member, or a custom designed neck member based on the hip joint mechanical analysis.

Abstract: An implant system is described to decrease the risk of hip fracture in humans determined to be at increased risk for hip fracture, over a time span well over several years after implantation. This implant increases the size of the contact area on the proximal femur at the time of a fall, decreasing contact pressures and contact stresses. The implant may be able to absorb energy on impact or cause an increase of energy absorption by the soft tissues, thus decreasing the energy transfer to the proximal femur at the time of a fall. The implant may also strengthen the proximal femur, while minimizing stress shielding of the surrounding bone. In addition, it minimizes the risk of displacement should fracture occur, thus minimizing the risk of formal fracture surgery. The method of application minimizes risks associated with initial application of the implant.

Abstract: The invention relates to a package for receiving an adapter sleeve for a hip endoprosthesis, the hip endoprosthesis comprising a ball head which has to be pushed onto the adapter sleeve with a defined pushing-on force. For simplification and secure fastening of the ball head on the adapter sleeve, it is proposed according to the invention that a device for the mounting of the ball head on the adapter sleeve is integrated in the package and this device comprises indicating elements which indicate that the defined pushing-on force has been reached when the ball head is pressed onto the adapter sleeve.

Abstract: A hip replacement apparatus that normally includes a supporting rod bent into an acute angle at its center with a rounded head on one end. This supporting rod can be received at the pelvis into a pre-assembled housing with a backplate and front plate where the unit can be cemented and/or screwed into the prepared bone at the hip joint. The backplate can have an anchoring protrusion that mates into the trimmed-out bone at the joint. The front plate can have a center hole that receives, and holds the rounded head of the supporting rod from escaping. The head (and hence the supporting rod) freely rotates captively in the housing with the housing firmly attached to the pelvis. The bottom end of the supporting rod can penetrate into the center of the cut-off femur and can be cemented into the bone. The supporting rod can be held to the femur with a bone clamp apparatus including a side plate that can be banded firmly to the femur with one or a more bands.

Abstract: A femoral component having a head portion with an outwardly facing bearing surface and an opposing inner surface configured to fit over a prepared femur The femoral component also includes a stem portion which is for insertion into the prepared femur, the stem portion having a first end for engagement with the inner surface of the head portion. The head portion is provided on the inner surface with engagement means suitable for releasable engagement with complementary engagement means provided at the first end of the stem portion. The stem portion comprises a non-resorbable portion comprising the engagement means and a resorbable portion. The engagement means may, for example, be screw threads, bayonet fittings or push or press fit fittings of complementary tapers.

Abstract: A substantially cup-shaped prosthetic device for a joint is provided. The prosthetic device includes an outer surface configured to operatively engage at least one of a first bone of the joint and a component and an inner surface configured to connect to a second bone of the joint. The inner surface is rotationally asymmetric to minimize intrusion on a vascular region of the second bone.

Abstract: An implantable joint prosthesis configured such that it does not squeak during movements of a subject. The joint prosthesis includes a means to modify the dynamic response of parts of the prosthesis such the response is not audible to the human ear.

Abstract: A prosthetic femoral implant has a stem having a proximal end and a distal end. A circumferential collar is formed on the proximal end of the stem having a proximally facing surface in the form of a circular disc extending radially inwardly and proximally from a maximum outer circumference to a central neck region. The collar has a distally facing surface extending radially inwardly and distally at an included angle with respect to a central longitudinal axis of the neck region of between 120 and 140°. The distal surface of the collar is v-shaped and may be conical in form.

Abstract: The invention relates to a shaft for a femoral neck prosthesis, which comprises an anchoring area (27, 29) which is arranged inside the femur in order to anchor the prosthesis into bone, a head area which is axially adjacent to the anchoring area (27, 29) on the proximal side, said head area comprising a device (13) which is connected to the prosthesis head (15), in addition to a distal end which is arranged opposite the head area in the axial direction of the anchoring area (27, 29). The invention is characterised in that the maximum cross-sectional dimension of the head area is at the most equal and, in particular, smaller than the maximum diameter of the anchoring area (27, 29), in such a manner that the maximum cross-sectional dimension of the shaft (11) is in the anchoring area (27, 29).

Abstract: A temporary femoral implant system has a porous mold and a femoral component. The system fits at least partially in a femoral cavity. The mold has a wall with an interior surface and an exterior surface forming an interior space for receiving an antibiotic bone cement. The mold allows the antibiotic to diffuse through the wall to the exterior surface. The femoral component has a stem portion received within the mold. A method of using the implant system includes providing an implant system comprising a mold and a femoral component, inserting the mold into the femoral cavity with the exterior surface facing the femoral cavity, inserting the stem portion of a femoral component into the interior space of the mold and filling the interior space of the mold with an antibiotic bone cement.

Abstract: A method of implanting at least a stem member of a femoral insert into an intramedullary canal of a femur. The method includes making an anterior incision for accessing the intramedullary canal, and inserting a stem member of the femoral insert into the intramedullary canal through the incision along an arcuate path defined by an arcuate profile of the stem member.

Abstract: A method for placing a pelvic implant including a cup and a femoral stem includes planning at least one of a location of the cup within a pelvis and a location of the stem within a femur such that a combined anteversion between a predetermined cup component and a predetermined femoral stem component satisfies a predetermined combined anteversion.

Abstract: Prosthetic hip stems for use in prosthetic hip joints and, in particular, provides prosthetic hip stems that are designed to achieve more optimized outcomes with certain types of patient anatomy, such as the anatomy of female patients and/or patients having osteoporosis. Each hip stem in a family or set of hip stems has diaphyseal width, metaphyseal width, offset, and head height dimensions. In a set of hip stems of increasing nominal size, the diaphyseal width dimension increases substantially non-proportionally to the corresponding increase of the metaphyseal width, offset, and head height dimensions, thereby providing a family or set of hip stems that is particularly adapted for patients having osteoporosis, in which the cortical bone of the diaphysis of the femur becomes thinner with progression of the osteoporosis.

Abstract: A prosthesis for partial replacement of a long bone in humans or animals, the prosthesis including: a proximal or distal end component forming one component of a prosthetic joint; a shaft on or assembled with the distal or proximal end component in use; a stem for engagement in a resected bone; and an initially separate collar assembled to the shaft or an extension thereof in use, the collar being dimensioned to abut the resected end face of the bone into which the prosthesis is to be fitted, wherein the end face of the collar facing the resected face of the bone is sized and shaped to correspond to the resected end face of the bone.

Abstract: A system and method for trialing a modular hip replacement system permits evaluation and replication of the anatomic anteversion rotational angle of the femur. In one embodiment, a femoral hip implant kit includes at least one distal implant and a plurality of femoral heads, each of the plurality of femoral heads having a diameter different from the diameter of the other of the plurality of femoral heads. The kit includes a proximal trial housing with a bore within the housing, the bore configured to receive a portion of the distal implant, a collet located within the bore, the collet including an outer wall portion extending between a top surface portion and a bottom surface portion, a collapsing member for engaging the portion of the distal implant and for forcing the top surface portion of the collet toward the bottom surface portion of the collet along a first axis.

Abstract: Methods, systems and devices for preventing prosthetic articulating surfaces from separating from each other. A containment system according to one embodiment seeks to prevent an implant stem head from dislocating from a prosthetic component while providing an increased range of motion over conventional contrained components. In one embodiment, an implant structural member includes a cavity and an opening having a lip, including a web along a portion of the lip. An implant stem head has a cooperating surface that corresponds with the web, so that when the cooperating surface of the implant stem head is aligned with the web, the head may be inserted into the implant structural member. The implant stem head is then rotated and the femoral stem component attached, thereby preventing dislocation of the head.

Abstract: A prosthetic component assembly, such as an acetabular cup, includes a shell and a bearing insert or liner. The shell and bearing insert are configured to provide an increased congruency between the shell and the bearing insert thereby decreasing the amount of motion (i.e. micromotion) between the shell and the bearing insert. In one form, increased congruency is achieved through first and second (inner and outer) tapers that are respectively provided on the shell and the bearing insert. The outer taper has first and second outer taper portions. A relationship between the first outer taper portion and the inner provides an essentially congruent fit, while a relationship between the second taper portion and the inner taper provides an interference fit. The relationships between the inner and outer tapers allow the bearing insert to achieve load sharing at a dome of the outer shell as well as at a rim of the shell.

Abstract: An implant includes a body configured to be implanted at least partially within a bone canal. The body has a proximal end, a longitudinal axis and a cavity located at the proximal end. The cavity is configured to mate with an insertion tool and defines a cavity axis that is not parallel to the longitudinal axis of the implant.

Abstract: In a joint prosthesis with a base piece for anchoring in the bone, a collar piece articulated thereon and defining a collar axis, and a collar extension on the collar piece situated on the collar axis, an articulation space is formed on the base piece. An articulation head of the collar piece is disposed therein. The joint prosthesis further includes a head cap disposed on the collar extension and at least one pressure piece for pressing the articulation head against the base of the articulation space. The pressure piece and the base piece can be connected. In a joint prosthesis of this kind, the pressure piece includes a pressure disc with a passage opening for the collar extension.

Abstract: A minimally invasive hip replacement surgical procedure that is also tissue preserving is disclosed. By making a superior incision, rather than a posterior incision, neither the posterior hip capsule, nor the gluteus medius or minimus are dissected. This results in improved post-operative results in the form of less dislocations and better healing.

Abstract: A surgical procedure for replacing a destructed hip joint with an artificial joint is disclosed. The present invention provides a two-incision minimally invasive surgery for total hip arthroplasty.

Abstract: A method and apparatus for performing a minimally invasive total hip arthroplasty. An approximately 3.75-5 centimeter (1.5-2 inch) anterior incision is made and the femoral neck is severed from the femoral shaft and removed through the anterior incision. The acetabulum is prepared for receiving an acetabular cup through the anterior incision, and the acetabular cup is placed into the acetabulum through the anterior incision. In one exemplary embodiment, a posterior incision of approximately 2-3 centimeters (0.8-1.2 inches) is generally aligned with the axis of the femoral shaft and provides access to the femoral shaft. In this embodiment, Preparation of the femoral shaft including the reaming and rasping thereof is performed through the posterior incision, and the femoral stem is inserted through the posterior incision for implantation in the femur. In an alternative embodiment, preparation of the femur is effected through the anterior incision, with the operative hip placed in hyperextension.

Abstract: The present invention provides an improved junction for modular implant components.

Abstract: Prosthetic joints, components for prosthetic joints, superhard bearing and articulation surfaces, diamond bearing and articulation surfaces, substrate surface topographical features, materials for making joints, bearing and articulation surfaces, and methods for manufacturing and finishing the same, and related information are disclosed, including a diamond-surfaced femoral head for use in a prosthetic joint.

Abstract: A method and apparatus for performing a minimally invasive total hip arthroplasty. An approximately 3.75-5 centimeter (1.5-2 inch) anterior incision is made in line with the femoral neck. The femoral neck is severed from the femoral shaft and removed through the anterior incision. The acetabulum is prepared for receiving an acetabular cup through the anterior incision, and the acetabular cup is placed into the acetabulum through the anterior incision. A posterior incision of approximately 2.5-3.75 centimeters (1-1.5 inches) is generally aligned with the axis of the femoral shaft and provides access to the femoral shaft. Preparation of the femoral shaft including the reaming and rasping thereof is performed through the posterior incision, and the femoral stem is inserted through the posterior incision for implantation in the femur.

Abstract: A plastic jacket for affixing an artificial joint to a bone. The plastic jacket includes a body for contacting with the bone, an opening for receiving the artificial joint, which is formed with a predetermined shape at one end of the body, and an closed wall formed at another end of the body.

Abstract: A method and apparatus for performing a minimally invasive total hip arthroplasty. An approximately 3.75-5 centimeter (1.5-2 inch) anterior incision is made and the femoral neck is severed from the femoral shaft and removed through the anterior incision. The acetabulum is prepared for receiving an acetabular cup through the anterior incision, and the acetabular cup is placed into the acetabulum through the anterior incision. In one exemplary embodiment, a posterior incision of approximately 2-3 centimeters (0.8-1.2 inches) is generally aligned with the axis of the femoral shaft and provides access to the femoral shaft. In this embodiment, Preparation of the femoral shaft including the reaming and rasping thereof is performed through the posterior incision, and the femoral stem is inserted through the posterior incision for implantation in the femur. In an alternative embodiment, preparation of the femur is effected through the anterior incision, with the operative hip placed in hyperextension.

Abstract: Prosthetic joints, components for prosthetic joints, superhard bearing and articulation surfaces, diamond bearing and articulation surfaces, substrate surface topographical features, materials for making joints, bearing and articulation surfaces, and methods for manufacturing and finishing the same, and related information are disclosed, including a prosthetic joint having substrate surface topographical features and at least one diamond articulation surface.

Abstract: A series of humeral stems, each stem including an axial bore and longitudinal slots along the distal end to allow for distal compression. The compression force necessary to compress the distal diameter of each stem varies by stem diameter. Thus, as the stem diameter increases through the series, the compression force decreases.

Abstract: A head component for use in a prosthetic joint such as a hip joint. The head has a body adapted to engage a natural acetabulum or a prosthetic acetabular cup component. The head has a recess with a resilient sleeve located therein adapted to engage the trunnion of a prosthetic stem component with which it is to be used. The sleeve material is more deformable than the trunnion material and can deform under sufficient force to absorb any unevenness in the trunnion surface.

Abstract: A prosthetic device for an enarthrosis of an extremity, such as the hip joint of the shoulder joint of a human body. The prosthetic device has a ball prosthesis portion and an optional socket prosthesis portion. The ball prosthesis portion is non-inflatable, having a ball member joined to an axial end of a body member via a neck member, and is securable to the extremity. In particular, the ball prosthesis portion has a transverse profile that is adapted for enabling the same to be implanted in the enarthrosis via a suitable portal formed through the lateral cortex of the long bone of the enarthrosis.

Abstract: Prosthetic joints, components for prosthetic joints, superhard bearing and articulation surfaces, diamond bearing and articulation surfaces, substrate surface topographical features, materials for making joints, bearing and articulation surfaces, and methods for manufacturing and finishing the same, and related information are disclosed, including a prosthetic hip joint having a polycrystalline diamond compact articulation surface and a counter bearing surface.

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: A method and apparatus for performing a minimally invasive total hip arthroplasty. An approximately 3.75-5 centimeter (1.5-2 inch) anterior incision is made in line with the femoral neck. The femoral neck is severed from the femoral shaft and removed through the anterior incision. The acetabulum is prepared for receiving an acetabular cup through the anterior incision and the acetabular cup is placed into the acetabulum through the anterior incision. A posterior incision of approximately 2-3 centimeters (0.8-1.2 inches) is generally aligned with the axis of the femoral shaft and provides access to the femoral shaft. Preparation of the femoral shaft including the reaming and rasping thereof is performed through the posterior incision, and the femoral stem is inserted through the posterior incision for implantation in the femur.

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 method and apparatus for performing a minimally invasive (i. e., with the wound developed under an incision being substantially the same size as the incision throughout the depth of the wound) total hip arthroplasty. The apparatus includes a provisional femoral head allowing for radial placement thereof on a provisional femoral neck as well as a posterior retractor sleeve for allowing access to a femur through a posterior incision.

Abstract: There is disclosed a hip prosthesis to replace a damaged hip-joint. The hip prosthesis is intended to be disposed at one end thereof into a cup-shaped cavity of an acetabulum and at the other end thereof into a femur canal of a person suffering from a damaged hip-joint. The hip prosthesis comprises an acetabulum part having a cotyloid member to be tightly engaged into the acetabulum, an elongated neck part, and a femur part. The elongated neck part has an articulation head at one end thereon, the head being shaped to be articulately received in the acetabulum part, and a slidable connection at the other end thereof for engagement with the femur part. The femur part has a femur canal insertable portion formed with an arrangement to secure same in the femur canal by being embedded in regenerated bone marrow, and an engaging channel to receive the slidable connection of the elongated neck part and to securely connect the elongated neck part to the femur part.

Abstract: The present invention relates to a prosthetic device for placement in an implant area of the body. The prosthetic device comprises an elongated stem portion, a neck portion, and a head portion. Each of the stem, neck, and head portions comprise a material impregnated with an antibiotic agent such that, when the prosthetic device is inserted into the implant area in place of a weight-bearing prosthesis, the antibiotic agent can leach out of the material to fight infection in the implant area. As an added benefit, the structure of the prosthetic device maintains adequate joint spacing in opposition to contraction of the muscles and tendons of the patient over a period of time so that a weight-bearing prosthesis can again be implanted into the implant area after the infection has been overcome.

Abstract: A prosthesis provided with a device for guiding its stem in a bone cavity and in which it is to be attached by cement. The sleeve guiding device comprises a sleeve having an opening to receive the stem and locate the sleeve on the stem at a position at or towards its proximal end. The is dimensioned and adapted to locate the stem in a predetermined position within the cross-sectional area of the bore of the bone cavity.

Abstract: The present invention provides a femoral prosthesis to be utilized as an implant into a human femur to connect the coxa. The femoral prosthesis comprises a stem body to be inserted into a femur bone, a neck portion fixed integrally at the proximal portion of the stem body, a spherical head member having an opening to receive the neck potion, and a cross pin for fixing the stem body to the femur bone, wherein the stem body is formed with a pinnig hole through a proximal portion thereof corresponding to a greater trochanter of the femur bone, and the cross pin is in a unthreaded cylindrical shape and inserted into the pinning hole, both ends of the cross pin being projected out of the stem body to be engaged with the bone wall of the femur bone.