Abstract: A trial device and a method for using the device in surgery are disclosed. The device includes a body including a proximal portion and a distal portion. The proximal portion has a post or trunion projecting therefrom. The distal portion extends from the proximal portion and includes a first arm and a second arm, the first and second arms being moveable with respect to one another. The body further includes a cavity formed therein so as to extend through the proximal portion and into the distal portion. The device further includes a driver adapted for sliding engagement within the internal cavity of the body such that movement of the driver, preferably in a distal direction, causes movement of a portion of the first arm away from a portion of the second arm.

Abstract: A hip prosthesis is provided for insertion into a femur. In one exemplary embodiment, the hip prosthesis includes a stem having a proximal end, a distal end, and a longitudinal axis. This stem may include anterior and posterior locking surfaces which diverge away from the longitudinal axis. A shank portion may extend distally from the anterior and posterior locking surfaces and converge at an angle distally toward the longitudinal axis.

Abstract: Systems and methods for determining placement of prosthetic components in joint including defining patient-specific frame of reference for joint, determining patient-specific postoperative range of motion of joint, evaluating patient-specific range of motion of joint, automatically planning placement of components balancing need for range of motion with prosthesis stability through bony coverage, and applying manual adjustments to the automatically planned placement of component by giving greater or lesser weight to need for range of motion or prosthesis stability through bony coverage. Apparatuses for defining center of prosthetic femoral head and axis of prosthetic femoral neck including primary cylinder, first alignment receptacle and second alignment receptacle, and a divot on exterior of primary cylinder, divot having normal parallel to longitudinal axis of second alignment receptacle and position of the divot being translated toward an opening of the first alignment receptacle on the primary cylinder.

Abstract: The present invention relates to a method of treating a hip joint of a human patient by providing at least one hip joint surface, said hip joint comprising a caput femur and an acetabulum, said method comprising the steps of: cutting the skin of said human patient, dissecting an area of the pelvic bone on the opposite side from said acetabulum, creating a hole in said dissected area, said hole passing through said pelvic bone and into said hip joint of said human patient, and providing at least one hip joint surface to said hip joint, through said hole in said pelvic bone of said human patient.

Abstract: A medical device, system, and method for treating hip joint osteoarthritis by providing a hip joint surface is provided. The hip joint comprising an acetabulum, being a part of the pelvic bone, comprising an acetabulum surface, and a caput femur, being a part of the femoral bone, comprising a caput femur surface. The medical device comprises a first sealing member adapted to be placed in the hip joint for creating a hollow space together with; the acetabulum, or an artificial replacement therefor, and the caput femur, or an artificial replacement therefor. The first sealing member is further adapted to have a shape adapted to seal the hollow space for receiving, within the hollow space, a material for resurfacing at least one of the acetabulum surface and the caput femur surface.

Abstract: A labrum implant can include a body portion and an attachment member. The body portion can be formed of a biocompatible flexible polymer and can include a base, an opposed upper end opposite the base, an interior femoral head engaging side, and an opposed exterior side. The interior side can include an arcuate shape in cross-section adapted to conform to an articular surface of a femoral head. The body portion can include an arcuate shape in plan view adapted to conform to at least a portion of a rim of an acetabulum and a plurality of bores extending therethrough from the upper surface or the exterior side to the base. The attachment member can include at least a portion coupled to at least one of the bores and can be adapted to secure the implant to the acetabular rim such that the base engages the acetabular rim.

Abstract: A surgical apparatus includes an orientation sensor that detects an actual orientation of a surgical tool. The apparatus also includes an orientation feedback device that selectively provides an orientation feedback signal. Moreover, the apparatus includes a controller that causes the orientation feedback device to provide the orientation feedback signal when the actual orientation of the surgical tool detected by the orientation sensor is substantially equal to a predetermined target orientation of the surgical tool.

Abstract: An improved hip prosthesis includes an acetabular cup bearing component constructed from a relatively hard and high strength ceramic material for articulation with a ball-shaped femoral head component which may be constructed from a compatible ceramic or metal material. In one form, the acetabular cup further includes a ceramic porous bone ingrowth surface adhered thereto for secure ingrowth attachment to natural patient bone.

Abstract: A disassembly tool for disassembly of a first component of a prosthesis to a second component of the prosthesis for use in joint arthroplasty. The tool includes a first member having a radial portion operably associated with the first component and adapted to exert a radial force on the first component. A second member operably associated with the second component is also included and the second member has a second member longitudinal axis. A drive mechanism is coupled to the second member, such that as the drive mechanism is activated, the second member exerts a force against the second component in the direction of the longitudinal axis. Such exertion of force against the second member further causes the second member to move relative to the first member along the second member longitudinal axis.

Abstract: An apparatus and related method for controlling a load on a human hip joint during normal gait while preserving motion. The approach is intended to treat osteoarthritis of the hip without substantially resisting an angular displacement associated with full mobility of the pelvis and femur bones.

Abstract: A system and method for attaching soft tissue to a prosthetic implant can include a prosthetic component that defines a soft tissue attachment region having an attachment surface thereon. A first construct can be formed of porous metal and be removably coupled to the attachment surface. A second construct can be positioned outboard of the soft tissue. A fastener can be engaged to the second construct capturing the soft tissue against the first construct. The fastener can be coupled on a distal end to the first prosthetic component.

Abstract: An intracorporeal portion of a percutaneous device for a joint disarticulation prosthesis or joint replacement prosthesis, the intracorporeal portion having an extracorporeal portion or having means for rigidly coupling directly to an extracorporeal portion, the extracorporeal portion being for location exterior to the skin, the intracorporeal portion having an articulating component for articulating with an articulating surface, wherein the articulating component is intracorporeal when installed in a human or animal subject.

Abstract: A prosthetic joint includes: (a) first member having a balanced centroidal axis, and comprising a rigid material and a concave interior defining a cup surface, the cup surface including: (i) a cantilevered first flange defining a wear-resistant protruding first contact rim, the first flange being asymmetric relative to the balanced centroidal axis; and (ii) a cantilevered second flange defining a wear-resistant protruding second contact rim; (b) a second member comprising a rigid material with a wear-resistant, convex contact surface; (c) where the first and second contact rims bear against the contact surface of the second member, to transfer loads between the first and second members, while allowing pivoting motion therebetween; and (d) wherein the flanges are shaped and sized so as to deform elastically and permit the first and second contact rims to conform in an irregular shape to the contact surface, when the joint is under load.

Abstract: A method of optimizing the geometry of a femoral stem of a hip joint prosthesis is disclosed. The femoral stem comprises a neck and an anchoring blade that is attached to the neck and that tapers towards a distal end with a lateral narrow side comprising a distal straight portion and a proximal arcuate portion corresponding to a curve. The transition between the distal straight portion and the proximal arcuate portion occurs at an outer lateral point. The method comprises a means of optimizing the profile of the curve of said proximal arcuate portion by a process of iterative modeling steps using a series of curves each defined by a path traced by the outer lateral point on withdrawal of a profile of the stem from a cavity of complementary shape to the stem. Preferably, during withdrawal of the profile of the stem from the cavity contact between lateral-distal and proximal-medial stem contours and respective associated boundaries of the cavity are maintained.

Abstract: New Bacillus licheniformis strain named V9T14 that produces a new biosurfactant composition that is effective against colonization and/or bio film formation from bacteria. The new biosurfactant composition can be used in combination with biocides for preventing formation and/or for eradicating bacteria grown planktonically and/or as a biofilm, preferably on biotic and/or abiotic surfaces.

Abstract: A kit for use in performing revision surgery on a cavity in a canal of extending from a resected plane a long bone is provided. The kit includes a canal component fitted to the cavity. The canal component includes a canal portion having first and second ends. The canal component further includes a sleeve portion having an external periphery and an internal periphery defining an internal cavity. The kit also includes a first joint component having a body portion and a connection portion. The connection portion is fitted into the sleeve portion. A connection portion of a second joint component also may be fitted into the sleeve portion so that the external periphery of the connection portion of the first joint component is spaced inwardly from the external periphery of the sleeve portion of the canal component when the first joint component is fixedly connected to the canal.

Abstract: Biomimetic Hybrid Actuators employed in biologically-inspired musculoskeletal architectures employ an electric motor for supplying positive energy to and storing negative energy from an artificial joint or limb, as well as elastic elements such as springs, and controllable variable damper components, for passively storing and releasing energy and providing adaptive stiffness to accommodate level ground walking as well as movement on stairs and surfaces having different slopes.

Abstract: The present disclosure is directed to orthopedic implants and methods of rapid manufacturing orthopedic implants using in vivo data specific to an orthopedic implant or orthopedic trial. Specifically, the instant disclosure utilizes permanent orthopedic implants and orthopedic trials (collectively, “implants”) outfitted with kinematic sensors to provide feedback regarding the kinematics of the trial or implant to discern which implant is preferable, and thereafter rapid manufacturing the implant.

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: In a human hip replacement process, the steps include providing a selected size generally longitudinally extending stem and laterally angled neck, the stem received endwise into a recess in an elongated femur, there being a ball on the neck, the neck and stem having a non-circular tongue and groove interfit connection to resist relative rotary displacement therebetween, the connection defining a generally longitudinal axis, fitting the ball in a socket on a hip bone, to pivot in the socket, the selection of stem and neck, and tongue and groove connection between the size selected stem and neck, enabling accurate pivoting of the ball. A set of different size balls and neck units are enabled for selective choice, as during surgery.

Abstract: The present invention discloses methods for enhancing the wear-resistance of polymers, the resulting polymers, and in vivo implants made from such polymers. One aspect of this invention presents a method whereby a polymer is irradiated, preferably with gamma radiation, then thermally treated, such as by remelting of annealing. The resulting polymeric composition preferably has its most oxidized surface layer removed. Another aspect of the invention presents a general method for optimizing the wear resistance and desirable physical and/or chemical properties of a polymer by crosslinking and thermally treating it. The resulting polymeric compositions is wear-resistant and may be fabricated into an in vivo implant.

Abstract: The present invention discloses methods for enhancing the wear-resistance of polymers, the resulting polymers, and in vivo implants made from such polymers. One aspect of this invention presents a method whereby a polymer is irradiated, preferably with gamma radiation, then thermally treated, such as by remelting of annealing. The resulting polymeric composition preferably has its most oxidized surface layer removed. Another aspect of the invention presents a general method for optimizing the wear resistance and desirable physical and/or chemical properties of a polymer by crosslinking and thermally treating it. The resulting polymeric compositions is wear-resistant and may be fabricated into an in vivo implant.

Abstract: A modular implant system operable to implant into a selected portion of the anatomy. The modular implant system may include an adaptor to allow for interconnection of disparate connection portions to allow for connecting a plurality of connection types. Expanding the modularity of an implant system by allowing interconnection of a plurality of modular implant systems.

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 skeletal implant for replacing a human bone includes an inner reinforcing member and an outer plasticized and fluid resistant layer encasing the inner reinforcing member. A structurally rigid and foamable layer is disposed between the inner reinforcing member and the outer plasticized layer. An end of the outer layer is configured for receiving, in articulated engagement, an end of an adjoining bone. A plurality of ligaments are grafted between the implant and the adjoining bone and proximate the articulated engagement. Conduit passageways are also established between the inner reinforcing member and the end of the outer layer in order to communicate a fluid to an articulating engagement and ligament supporting location with an adjoining bone.

Abstract: A spacer device (1) for the two-step treatment of prosthesis infections, made from biologically compatible and porous material designed to allow the possibility of adding pharmaceutical products, active and/or therapeutic ingredients, includes a first portion (2) designed to be fixed to a corresponding bone bed remaining from a previous implant, and a second portion (3) designed to be inserted in a corresponding articular area of the patient, the first portion (2) and the second portion (3) being attached by adjustable connecting means (4).

Abstract: A prosthetic trial for a joint prosthesis includes a stem having a proximal section and a distal section for implantation in a bone. A body includes a channel receiving at least the proximal section of the stem. A locking mechanism is at least partially disposed within the body. The locking mechanism is biased into a locking position in which the mechanism locks the stem within the first channel of the body. The locking mechanism is accessible outside said body to be pulled into a releasing position to unlock the stem from the body.

Abstract: The present invention provides a dense-coverage, adherent phosphorous-based coating on the native oxide surface of a material. Disclosed phosphorous-based coatings include phosphate and organo-phosphonate coatings. The present invention also provides further derivatization of the phosphorous-based coatings to yield dense surface coverage of chemically reactive coatings and osetoblast adhesion-promoting and proliferation-promoting coatings on the native oxide surface of a titanium material.

Abstract: A hip prosthesis includes a straight shaft which is to be inserted into the femur, the straight shaft including a proximal part that is configured to be inserted in the metaphyseal region of the femur. The proximal part has, on each of its front and rear faces, at least one projecting fin with a steep medial flank that deviates at least over part of its length away from the longitudinal direction of the shaft. At its top the proximal part is inclined toward the femoral neck. In this way, when the shaft is driven into the bone, the bone substance surrounding the fin is compacted and is able to absorb greater forces. The height of the fin decreases from its medial flank toward its lateral edge.

Abstract: A prosthetic joint includes: (a) a first member comprising rigid material including a wear-resistant, concave cup surface; and (b) a second member comprising rigid material with a wear-resistant, convex contact surface; (c) one of the surfaces includes: (i) an annular first flange defining a protruding wear-resistant first contact rim at or near an apex of the member; and (ii) an annular second flange defining a protruding wear-resistant second contact rim, at or near an outer periphery of the member; (d) the first and second contact rims bear directly against the contact surface, so as to transfer loads between the first and second members, while allowing pivoting motion therebetween; and (e) the flanges are shaped and sized so as to deform elastically and permit the contact rims to conform in an irregular shape to the surface of the opposite member, when the joint is placed under a predetermined load.

Abstract: A prosthetic joint includes: (a) a bone-implantable first member comprising a rigid material and including a body having an annular flange extending outward at a first end thereof, the first end of the body and the flange cooperatively defining a wear-resistant concave first contact surface having a protruding rim and a recessed central portion; and (b) a bone-implantable second member comprising a rigid material with a wear-resistant convex second contact surface; (c) where the first and second contact surfaces bear directly against each other so as to transfer axial and lateral loads from one of the members to the other, while allowing pivoting motion between the two members; (d) wherein the flange is shaped so as to deform elastically and permit the first contact surface to conform to the second contact surface when the joint is placed under a predetermined load.

Abstract: The invention relates to a process for the production of an ultra-high molecular weight polyethylene ((U)HMWPE) article comprising: —copolymerizing ethylene with a linear, branched or cyclic polyene having 3 to 100 carbon atoms, resulting in a copolymer of ethylene and polyene ((U)HMWPE-P), using such a content of polyene that the number of polyene branches in (U)HMWPE-P is 0.01 to 15 on the average per 1000 carbon atoms; —cross-link the (U)HMWPE-P during or after molding the (U)HMWPE-P.

Abstract: A ligament incorporated into a prosthetic joint exhibiting a plasticized, elongated and deformable material. A fibrous material is internally disposed within the deformable material, the fibrous material terminating in first and second enlarged bead portions arranged in proximity to enlarged pocket defined ends associated with the deformable materials. First and second bones define a joint region therebetween, the deformable end pockets and bead portions being inserted through associated holes defined in joint proximate locations associated with the bones, so that actuation of a projection location of the fibrous material causes the bead portions to outwardly deflect the end pockets, resulting in the ligaments being anchored in place between the bones.

Abstract: Methods and devices are disclosed relating improved articular models, implant components, and related guide tools and procedures. In addition, methods and devices are disclosed relating articular models, implant components, and/or related guide tools and procedures that include one or more features derived from patient-data, for example, images of the patient's joint. The data can be used to create a model for analyzing a patient's joint and to devise and evaluate a course of corrective action. The data also can be used to create patient-adapted implant components and related tools and procedures.

Abstract: A medical device having body contacting surfaces provided with a film of amorphous calcium phosphate having a thickness of 1 nm to 10000 nm and an average dissolution rate calculated as the time taken to remove 95% of the film of at least 1 nm h?1 as determined in accordance with ASTM Standard P1926-03. The characteristics of the film are such that the film is relatively rapidly dissolved from the surface by body fluids. This dissolution of the surface film of amorphous calcium phosphate is sufficiently fast to prevent the attachment of bacteria, thus preventing them forming a biofilm and keeping the cells in a planktonic (non-biofilm) state where they are more vulnerable to the body's defences. The invention is particularly applicable to implants (e.g. orthopaedic implants such as prosthetic hips) but may also be applied to “non-implanted” devices such as surgical instruments.

Abstract: The present invention relates to improved biomedical implantable material comprising a plurality of pores, of which one or more of the pores are interconnected below the surface of the material. The improved biomedical implantable material may be used in biomedical implant devices such as orthopedic implants, spinal implants, neurocranial implants, maxillofacial implants, and joint replacement implants. The present invention also relates to a method of preparing an improved biomedical implantable material, comprising subjecting an implantable material to a pore-forming treatment and optionally further subjecting the material to a surface-modifying treatment. The biomedical implantable material may be used in other applications, which as applications where two surfaces are contacted and bonding between the surfaces is required.

Abstract: An elongate, longitudinally oriented outer sleeve includes an outer sleeve surface and has a sleeve body. A stem-receiving cavity extends from a distal sleeve end into the sleeve body. The distal sleeve end includes a sleeve interference protrusion extending from the distal sleeve end away from the sleeve body. A joint articulating member includes an elongate, longitudinally oriented stem. The joint articulating member includes a joint articulating surface spaced apart from a distal stem end by an angularly extending connector neck. When the stem is inserted into the stem-receiving cavity, the stem and the outer sleeve are configured for selective relative rotation about a shared longitudinal axis, and the connector neck impinges upon the sleeve interference protrusion responsive to a predetermined amount of relative rotation between the stem and the outer sleeve to prevent relative rotation between the stem and the outer sleeve outside a predetermined range of allowable rotation.

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 method for coating prosthesis elements that have a concave surface and a corresponding convex counter surface includes arranging in at least the concave surface a shaped retention surface for gripping a coating. The coating is coupled with the shaped retention surface such that coupling includes coating the concave surface with the coating temporarily in a moldable state to obtain a moldable coating. The moldable coating is made to solidify and adhere firmly to the shaped retention surface.

Abstract: A hip prosthesis for insertion into a femur. In one exemplary embodiment, the hip prosthesis includes a stem having a proximal end, a distal end, and a longitudinal axis. This stem may include anterior and posterior locking surfaces which diverge away from the stem. A shank portion may extend distally from the anterior and posterior locking surfaces and converge at an angle distally toward the stem.

Abstract: A system and method for trialing a modular hip replacement system (10) permits evaluation and replication of the anatomic anteversion rotational angle of the femur. A distal stem component (18) of the hip replacement system (10) includes a proximal portion (34) having a locator feature (35) that is externally accessible when the stem component is mounted within the femur. A proximal trial body assembly (60) is mounted on the proximal portion (34) of the distal stem component (18) to permit rotation of a trial neck component (62). The trial neck component (62) also includes a locator feature (126) that can be externally referenced to determine the anteversion angle.

Abstract: There is provided a method for creating a micro-topographical surface on biomedical implants that mimics a topography of bone to help facilitate osseointegration of the implant, as well as related devices and resulting implants. For example, a surface topography system is provided that includes a processor and a memory coupled to the processor. The processor is configured to process an image from a scanning electron microscope to determine a surface topography of bone. A surface manipulation device is configured to create the surface topography of bone on a surface of a biomedical implant.

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: This invention provides a femoral stem comprising a neck portion and an anchoring portion, wherein the inner curve of said anchoring portion conforms to the anatomic curve of the corresponding part of AVN patients. This invention also provides a total hip prosthesis embodying said femoral stem. Good morphological fit of said femoral stem geometry against the femoral medullary cavity of AVN patients enhances the long-term stability of prosthesis.

Abstract: The invention relates to a method for precipitating mono or multiple layers of a mixture of organophosphoric acids of the general formula I (A) Y—B—OPO3H2 ??(IA) or of organophosphonic acids of the general formula I (B) Y—B—PO3H2 ??(IB) and the salts thereof, wherein Y and B are defined in the specification. According to the invention, precipitation occurs on substrate surfaces of pure or mixed oxides, nitrides or carbides of metals and semiconductors, in particular as surfaces of sensor platforms, implants and medical accessory devices. The invention also relates to the use thereof as part of coated sensor platforms, implants and medical accessory devices.

Abstract: The present invention relates to processes involving contacting articles that include titanium or titanium alloy with a solution comprising hydrochloric acid and chloride-containing compound for a time and at a temperature effective to form a plurality of indentions that, independently, have a diameter of from about 200 nm to 10 microns.

Abstract: The present disclosure relates to prosthetic implants, components of prosthetic implants, and methods of fixating the components to one another and, especially fixation of the implants to bone.

Abstract: The present invention provides an irradiated crosslinked polyethylene containing reduced free radicals, preferably containing substantially no residual free radical. Disclosed is a process of making irradiated crosslinked polyethylene by irradiating the polyethylene in contact with a sensitizing environment at an elevated temperature that is below the melting point, in order to reduce the concentration of residual free radicals to an undetectable level. A process of making irradiated crosslinked polyethylene composition having reduced free radical content, preferably containing substantially no residual free radicals, by mechanically deforming the polyethylene at a temperature that is below the melting point of the polyethylene, optionally in a sensitizing environment, is also disclosed herein.

Abstract: A system and method for trialing a modular hip replacement system (10) permits evaluation and replication of the anatomic anteversion rotational angle of the femur. A distal stem component (18) of the hip replacement system (10) includes a proximal portion (34) having a locator feature (35) that is externally accessible when the stem component is mounted within the femur. A proximal trial body assembly (60) is mounted on the proximal portion (34) of the distal stem component (18) to permit rotation of a trial neck component (62). The trial neck component (62) also includes a locator feature (126) that can be externally referenced to determine the anteversion angle.

Abstract: A metal-backed acetabular implant and a method of forming the same.