Abstract: In one embodiment of the disclosure, a prosthetic bone implant includes a prosthesis and a tissue attachment structure connected to the prosthesis. The tissue attachment structure includes a connective structure connected to the prosthesis and an interface structure connected to the connective structure. The interface structure is configured for attachment of tissue thereto. When the interface structure is subject to tension, the connective structure changes in shape.

Abstract: Apparatus and Method for Hip Surgery. An adjustable trial femoral head (400) for assessing anteversion of an acetabular cup relative to a pelvis of a patient are described. The adjustable trial femoral head comprises a spherical body (402) having a bore extending along a polar axis of the spherical body and configured to receive a free end of a femoral neck. A visual alignment guide (420) is mounted on the at least partially spherical body and the orientation of the visual alignment guide relative to the spherical body is adjustable.

Abstract: A trial neck (30) and a method for trialling a neck of an orthopedic implant in a hip replacement procedure. The method includes inserting a broach (10) into a medullary canal of a femur and connecting a distal end of a trial neck to a proximal end (12) of the broach. The trial neck includes a proximal end connectable to a trial head. The trial neck includes a body portion extending along a neck axis (5) of the trial neck between the distal end and the proximal end. The proximal end includes a male connector for connection to a corresponding female connector of a trial head. The male connector includes a plurality of connection members (34A, 34B) extending parallel to the neck axis. The connection members are separated by one or more elongate slots (50) including at least one kink (52) forming an interlock between the connection members separated by that slot. The connection members are resiliently deflectable.

Abstract: A hip implant comprises an acetabular cup to be inserted into an acetabulum of a pelvis, together with a femoral head and neck portion and a main body shaft to be inserted into the femoral neck and proximal femoral shaft. The femoral head and acetabular cup form a smooth spherical-surface joint. The femoral head on a femoral head base is attached to a femoral neck rod, which has a tapered end that engages in a hole through the main body shaft, i.e. the main body shaft has a diagonal hole therethrough located at the center line of the neck of the femur to receive the tapered end at a specified angle that aligns with center line of the neck. A secured lock mechanism, insertable into the main body shaft above the diagonal hole, can be screwed down to compressively engage the tapered end of the femoral neck rod.

Abstract: An apparatus, system, and method may be used to replace a natural or artificial articular surface of a joint, and to repair a bone that is associated with the joint. In some embodiments, the apparatus, system, and method may include a joint replacement prosthesis with a prosthetic articular surface, a support structure securable to the bone, and a first attachment interface. The system may also include a bone plate with a bone engagement surface securable to the bone on either side of a fracture formed in the bone, or a damaged area of the bone. The bone plate may include a second attachment interface that is attachable to the first attachment interface of the joint replacement prosthesis in order to couple the bone plate to the joint replacement prosthesis.

Abstract: A metal/polymer composite material is disclosed, wherein the metal/polymer composite material comprises a polymer base and a metal heat-dissipation layer. The heat-dissipation layer comprises a roughed surface with an isotropic surface roughness. The metal heat-dissipation conformally blankets over the roughed surface.

Abstract: A femoral stem for use in hip replacement surgery, specifically hip replacement surgery in dogs and similar animals but also inclusive to implants used in humans. More particularly, the invention is directed to a femoral stem that includes a lateral bolt or post that protrudes through the cortex or wall of bone opposite the neck of the femoral stem. The lateral bolt or post reduces the occurrence of subsidence in implanted femoral stems. The lateral bolt or post provides an anchor point on the cortex or wall of bone as opposed to relying solely on the compression of the femoral stem against the wall of the bony canal of the femur being implanted.

Abstract: A robotic system for preparing a bone to receive a prosthetic device. The robotic system includes a controllable guide structure configured to guide cutting of the bone into a shape for receiving the prosthetic device, and a computer readable medium for storing data representative of the prosthetic device. The prosthetic device includes a body portion having an implantation surface configured to face the bone upon implantation and at least one feature that provides a constraint structure that will constrain the prosthetic device in the bone. The robotic system includes a control system for controlling the guide structure, and is configured to define at least one bone-cutting pattern for (i) removing a first portion of bone in a first area sufficient to seat the body portion and (ii) at least one of removing and maintaining a second portion of bone in a second area configured to interact with the constraint structure.

Abstract: An adjustable spacer modular device for the treatment of an articulation of the human body, comprising a fitting central body provided with an end having a substantially flat first surface, a head adapted to be arranged within an articular cavity, wherein the head comprising a cap and a base opposite to said cap, wherein the cap and the base are radiused to each other, a rod-like element, adapted to be fixedly connected at a bone end, first means for connecting the head to the central body, wherein the first connection means are adjustable and adapted to adjust the inclination of the head with respect to the central body along a longitudinal plane and/or along a transverse plane of the human body.

Abstract: A prosthesis for primary artrodhesis can be used for artroplasty and a prosthesis for artroplasty comprises members for artrodhesis. The prosthesis (1b) for primary artrodhesis comprises a locking member (33b) with an attachment portion (16b) which is insertable into a hole (8b) in a first attachment member (4b) of the prosthesis for location of the locking member therein, and a lockable member (34b) integral with a second attachment member (5b) of the prosthesis. The lockable member (34b) is configured for adjustable setting thereof relative to the locking member (33b) and for fixation thereof, in set position, to the locking member. Alternatively, the lockable member comprises an attachment portion which is insertable into a hole in the second attachment member for location of the lockable member therein.

Abstract: Modular neck components for hip implants having independent variables associated with physical characteristics of the implant, including leg length, offset, and anteversion. During surgery, the surgeon may be confronted with a need to change a preoperatively-chosen modular neck. For example, the surgeon may desire a change in at least one of the variables, e.g., leg length, offset, and/or anteversion. The present disclosure allows the surgeon to quickly and easily select a different modular neck based on an evaluation of one of the variables without requiring reevaluation of the other variables.

Abstract: A femoral stem for use in hip replacement surgery, specifically hip replacement surgery in dogs and similar animals but also inclusive to implants used in humans. More particularly, the invention is directed to a femoral stem that includes a lateral bolt or post that protrudes through the cortex or wall of bone opposite the neck of the femoral stem. The lateral bolt or post reduces the occurrence of subsidence in implanted femoral stems. The lateral bolt or post provides an anchor point on the cortex or wall of bone as opposed to relying solely on the compression of the femoral stem against the wall of the bony canal of the femur being implanted.

Abstract: An implant for a hip can include a lateral augment adapted to be coupled to a lateral side of a femoral body implant. The lateral augment can include a body portion having a first surface, a second surface opposite the first surface, and a protrusion extending from the second surface. The protrusion can have a shape adapted to mate with a complementary shaped recess formed in the lateral side of the femoral body implant. An aperture can be positioned in the body portion and extend through the protrusion. A fastener can be received through the aperture and adapted to be threadably secured to the lateral bore. The fastener can be configured to have a length sufficient to pass through a portion of a greater trochanter for securing the portion of the greater trochanter and the lateral augment to the femoral body implant.

Abstract: A modular femoral prosthesis for use during performance of a hip revision procedure includes a proximal body component, a distal stem component, and a locking bolt. Surgical instruments and methods for use in implanting such a modular femoral prosthesis are disclosed.

Abstract: The present teachings are directed to a shoulder prosthesis having an adjustable radial offset and/or angular inclination provided by relative rotation of an adapter interdisposed between a stem and a head. In one example, a prosthesis has a stem having a first longitudinal axis. The prosthesis can also include an adaptor including a first taper. The first taper can have a first taper axis. The prosthesis can include a head supported by the adaptor. The head can be selectively oriented and then coupled to the first taper and the combination can be selectively orientated and the coupled to the stem.

Abstract: A modular femoral prosthesis for use during performance of a hip revision procedure includes a proximal body component, a distal stem component, and a locking bolt. Surgical instruments and methods for use in implanting such a modular femoral prosthesis are disclosed.

Abstract: A prosthesis for a joint includes a stem for engagement with a bone. The stem includes a surface defining a bore. The prosthesis further includes a joint component. The joint component includes a bearing surface for articulating engagement with at least one of a natural opposing joint component and a prosthetic opposing joint component. The prosthesis further includes a mounting element. The mounting element includes a proximal portion for engagement with the joint component and further includes a substantially solid articulating portion having a contiguous periphery. The substantially solid articulating portion is configured to facilitate articulating movement of the substantially solid articulating portion within the bore when the contiguous periphery is not forcefully engaged with the bore, and the substantially solid articulating portion and the bore are configured to fixedly couple the mounting element to the stem when the contiguous periphery is forcefully engaged with the bore.

Abstract: A femoral prosthesis for use during a revision procedure includes a proximal body, a distal stem, a modular neck, and a head. In operation, a surgeon may stabilize the proximal body and the distal stem of the prosthesis in a patient's femoral canal that has moderate loss of metaphyseal cancellous bone (known as a Paprosky Type I femoral defect), extensive loss of metaphyseal cancellous bone (known as a Paprosky Type II femoral defect), or extensive metaphyseal deterioration and some diaphyseal deterioration (known as a Paprosky Type IIIA femoral defect). Without disturbing this arrangement, the surgeon may then position the head in a desired location by selecting a desired modular neck to obtain proper joint kinematics.

Abstract: An implant for a hip can include a lateral augment adapted to be coupled to a lateral side of a femoral body implant. The lateral augment can include a body portion having a first surface, a second surface opposite the first surface, and a protrusion extending from the second surface. The protrusion can have a shape adapted to mate with a complementary shaped recess formed in the lateral side of the femoral body implant. An aperture can be positioned in the body portion and extend through the protrusion. A fastener can be received through the aperture and adapted to be threadably secured to the lateral bore. The fastener can be configured to have a length sufficient to pass through a portion of a greater trochanter for securing the portion of the greater trochanter and the lateral augment to the femoral body implant.

Abstract: A trial implant system includes a stem component and an articulating component forming part of a joint of a patient. A trial mounting assembly mounts the articulating component to the stem component at variable relative angular positions. The trial mounting assembly includes an expandable ball portion and an expansion element configured to expand the ball portion upon rotation of the expansion element. In an expanded state, the ball portion contacts a cavity within the stem at three points of contact to fix the center of rotation of the ball portion at a pre-determined location within the stem. The stem cavity defines an inwardly projecting circumferential lip that bears against ball portion as it expands to ensure the three-point contact.

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: Methods and apparatus of the present invention provide for orthopaedic replacement of the hip while substantially preserving muscles and soft tissues around the hip joint resulting in reduced healing time and decreased risk of dislocation following the procedure. In an exemplary embodiment, an intramedullary rod 1502 is inserted longitudinally into the femur. A prosthetic femoral neck 3102 is then inserted from a point along the side of the patient's body and into the side of the femur and through a pre-existing lateral bore in the intramedullary rod 1502 and through the remainder of the femur to join the prosthetic femoral head 1102. The methods and apparatus include structures and techniques for fixing the prosthetic femoral neck 3102 in relation to the intramedullary rod 1502.

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 implant assembly including body exhibiting a substantially spherical shaped ball and an elongated stem. An annular defining rim separates the ball from the stem and abuts, in a maximum inserting condition, an exterior surface of a reconditioned femur upon inserting the stem within an interior passageway associated with the femur. A three dimensional and interior volume defining support secures around the ball in a universally articulating permitting fashion, the support being fixed to a reconditioned acetabulum socket associated with an ilium bone by interconnecting posts and anchors established between the fixed support and the reconditioned surface of the acetabulum. A corresponding installation kit assists the preparation of the femur and ilium bones defining the hip joint, as well as the installation of the implant body into the upper conditioned femur end and the outer socket support to a reconditioned acetabulum defined in the ilium bone.

Abstract: Hip prosthesis including a medullar part of elongated shape intended to be engaged in the medullary canal of a femur, one part forming the prosthetic femoral neck intended to project from the femur and be fitted with a prosthetic femoral head, and a support collar extending transversely to the part forming the femoral neck and intended to take support on the femoral cortex, where the support collar includes a slot.

Abstract: A modular assembly for a femoral prosthesis comprises a femoral prosthetic implant forming a spindle of elongate and tapered shape and a one-piece neck. The implant consists of a diaphyseal lower part and a metaphyseal upper part having a flat face delimited by an outer edge and in which a cavity is formed. The neck is formed of a tenon having a shape corresponding to the cavity, said tenon being fitted into the cavity along an insertion axis YY perpendicular to the flat face and a rod provided with an interface for fixing a cup that is to be inserted into the acetabulum of the hip bone. The rod is provided with a tongue which protrudes parallel to the flat face in a radial direction with respect to the insertion axis and directed towards the interior of the obtuse salient angle, at a distance from the flat face of between 0.3 mm and 1.

Abstract: Apparatus and methods of protecting modular implant connection portions are provided. A guard includes an outer sidewall and an inner sidewall defining a cavity that covers a modular implant connection portion. The modular implant connection covered with the guard can facilitate test-fitting of other modular implant components and allows reaming of the tissue around the guard.

Abstract: A modular hip prosthesis includes a femoral stem, a spherical head and a coupling member extending from the head defining a neck whose lower end forms a base which plugs into a socket at the top of the stem to form a tapered neck/stem junction. That junction is aligned with the stem axis and has a cross-section with opposite sides that extend generally parallel to the sides of the stem. With such an arrangement, that junction may be relatively long and have a relatively large cross-sectional area thus making a strong junction even in smaller femoral implants.

Abstract: A thighbone shaft has a pole and a bolt. The pole defines an inclined threaded hole therein. Tooth portions are respectively formed at opposite sides of the pole. A head is arranged on a front portion of the pole. A sleeve is provided on the head. A threaded portion is formed on the bolt and is retained in the inclined threaded hole for engaging the bolt and the pole. The thighbone shaft is assembled easily, reduces planting area and replacement cost, decreases stress force, and promotes planting fixedness.

Abstract: A hip joint prosthesis that has a strap plate and a hollow, tapered femoral neck subassembly. The femoral neck includes a flanged force plate that radiates from a head stem base and abuts the femur. Several longitudinal ridges and/or an annular recess or other surface treatment at the head stem base facilitates retention in the femur. Shaped surfaces of a femoral neck at the strap plate interlock in non-rotational engagement with a bore of the head stem base. A tapered stem projects from the force plate and supports a ball head. The strap plate includes laterally and longitudinally displaced elongated fastener holes and stress relieving recesses and/or channels. Fasteners anchor the strap plate to the femoral shaft. A shouldered bolt mounts through the femoral neck to engage the ball head base and draw the ball head base and ball head toward the strap plate and contain the prosthesis to the femur.

Abstract: A modular orthopedic hip prosthesis having three main components: a stem, a proximal body, and a neck. The components are removably connectable and selectively adjustable. The neck is rotationally adjustable about the stem, and the proximal body is both rotationally and axially adjustable about the stem. A collet and locking member hold and lock the proximal body to the stem.

Abstract: The present invention relates to provisional prosthetic components for a medical device and the surgical methods for utilizing the same. In one embodiment, the provisional prosthetic component includes a first portion and a core. The first portion is capable of mating with another prosthetic component. The first portion of the provisional prosthetic component may have a scratch hardness which is less than the scratch hardness of the prosthetic component. This allows for the first portion to be placed in mating engagement with the prosthetic component without scratching or damaging the junction of the prosthetic component. Additionally, the core of the provisional prosthetic component may have a scratch hardness greater than the scratch hardness of the first portion of the provisional prosthetic component and/or a stiffness sufficient to minimize deflection of the provisional prosthetic component during trial reduction and range of motion testing.

Abstract: A modular hip prosthesis includes a femoral stem, a spherical head and a coupling member extending from the head defining a neck whose lower end forms a base which plugs into a socket at the top of the stem to form a tapered neck/stem junction. That junction is aligned with the stem axis and has a cross-section with opposite sides that extend generally parallel to the sides of the stem. With such an arrangement, that junction may be relatively long and have a relatively large cross-sectional area thus making a strong junction even in smaller femoral implants.

Abstract: An instrument is disclosed for inserting a modular implant, the instrument comprising a first end and a second end, the first end having engagement means for engaging a stem component of the modular implant, the engagement means comprising separation means for separating a body component of the modular implant and the stem component from one another so as to permit rotational positioning of the body component and the stem component relative to one another.

Abstract: An endoprosthesis utilizes a biomechanical structure based on the lever model of first degree. Contrary to the widespread practice, the inventive structure has a stem placed inside the femur bone, which is not rigidly attached to this bone. Accordingly, the bone, following its known tendency to slightly pivot away from the medial plane of the body in response to the loads, does not directly contact the stem. The neck portion experiences even greater loads then the stem. The supporting anchor has a region extending laterally from the stem and pressing against a supporting surface of the housing, which also extends laterally from the body of the housing. Since the stem, supporting anchor and neck are typically constitute a one-piece component, the lateral surfaces of the supporting anchor and housing are in continuous frictional contact during displacement of the stem and housing relative to one another.

Abstract: Modular joint prostheses and components thereof are disclosed. In an embodiment, a joint prosthesis may include a head member, a neck member, and a stem member.

Abstract: A conical coupling of a male member (10) and a female member (11), the male member (10) comprising a cone (12) ensleeved in a truncated conical portion (15) of a corresponding recess (14) formed in the female member (11), is characterized in that the female member (11) is made of a material having a Young's modulus at most equal to about 35 GPa and at most equal to that of the material from which the male member (10) is made, and in that a surface (13) of the male member perpendicular to the axis (A1) of the coupling is in contact with a surface (17) of the female member also perpendicular to the coupling axis such that the male and female members (10, 11) are in axial abutment against each other. The female member (11) is for example of pyrocarbon and the male member (10) of metal, ceramic or pyrocarbon.

Abstract: A prosthesis device for hip surgery replacement has a main body portion which is implanted in the femur of a patient. A series of adapters are provided from which one is selected. Each adapter has a tapered shank which is received a corresponding tapered bore in the main body portion forming a first lock therein. The adapter has tapered teeth which engage corresponding tapered teeth in the bore in the main body portion, forming a second lock. The adapter is indexed with respect to the main body portion. A method of use is disclosed.

Abstract: A prosthetic femoral stem component comprising a body element, a neck element and a stem element, with the body element, neck element and stem element being secured to one another with a modular connection, wherein the modular connection comprises a taper junction and an engaged-fit junction.

Abstract: Modular joint prostheses and components thereof are disclosed. In an embodiment, a joint prosthesis may include a head member, a neck member, and a stem member.

Abstract: Wheels, bearings, or other rotating elements are used to decrease friction in artificial joint components associated with knee and hip replacements, artificial ankles, elbows, wrist, finger joints, toe joints, and intervertebral discs. One or more seals may be used to trap debris inside the artificial joint. The seal may surround the periphery of the component(s), and may be used to hold a fluid within the joint. Various fluids or lubricants are applicable to these embodiments, including water or aqueous solutions, triglyceride oil, soybean oil, an inorganic oil (e.g. silicone oil or fluorocarbon), glycerin, ethylene glycol, or other animal, vegetable, synthetic oil, or combinations thereof could be used. The seal could be made of an expandable elastomer such as those used in medical devices for the cardiovascular system.

Abstract: Disclosed is a modular femoral prosthesis having a neck element 18 that can be selectively positioned atop a stem element 12 by inserting a grooved shaft 26 that extends downward from the bottom of the neck element 18 into a corresponding slotted recess 32 originating on a top portion of the stem element 12 and continuing longitudinally partially therethrough. The axial orientation of the neck element 18 relative to the stem element 12 can thus be rotated accordingly during insertion of the grooved shaft 26 into the slotted recess 32. The stem 13 can be cylindrical in form or tapered. Locking screw 30 is provided to secure the neck element 18 to the stem element 12.

Abstract: This invention provides for a system of temporary or “trial” implants which are used to establish the optimal location of the femoral head relative to the body of the hip stem implant. Using a series of interchangeable modular femoral neck components that mate with a series of interchangeable modular femoral body components, the location of the femoral head can be independently adjusted with respect to horizontal offset, vertical offset and anteversion angle relative to the body.

Abstract: A hip prosthesis constructed to transfer forces to the femur without relative movements that cause failures. The prosthesis stem has an open sided central bore. The proximal end of the prosthesis is configured to seat against interior surfaces of the femoral canal and support a femur head on a prosthesis shoulder that seats on the stem proximal end while maintaining the neck of the femur intact.

Abstract: A femoral neck fixation prosthesis and method of using same which reduces bone loss and the avoids the other shortcomings of the prior art by allowing the fixation of a stable femoral head replacement while reducing the amount of the femur which must be reamed for the insertion of the prosthesis. The preferred embodiment provides that the femoral head is attached to a fixation prosthesis which extends coaxially through the canal of the femoral neck, into the femur, and is then attached to the opposite lateral wall of the femur. In this manner, the prosthesis serves to imitate the original structure of the femoral neck. No other support members, either crosspins or arms extending into the length of the femur, are required.

Abstract: A conical coupling of a male member (10) and a female member (11), the male member (10) comprising a cone (12) fitted in a truncated conical portion (15) of a corresponding recess (14) formed in the female member (11), is characterized in that the female member (11) is made of a material having a Young's modulus at most equal to about 35 GPa and at most equal to that of the material from which the male member (10) is made, and in that a surface (13) of the male member perpendicular to the axis (A1) of the coupling is in contact with a surface (17) of the female member also perpendicular to the axis of the coupling such that the male and female members (10, 11) are in axial abutment against each other. The female member (11) is for example of pyrocarbon and the male member (10) of metal, ceramic or pyrocarbon.

Abstract: In a joint prosthesis the head cap is connected via a collar piece to the shaft piece which may be anchored in the bone. The collar piece is coupled to the shaft piece by a joint head in a ball-jointed manner. The articulation surfaces between the joint cavity in the shaft piece and the articulation head on the collar piece are embodied such that on pressing the articulation head to the base of the joint cavity, edges or projections on the one articulation surface digs into the other articulation surface lying on a virtual spherical surface. It is thus possible to achieve a ball-joint like articulation, whereby the spherical surfaces may have a relatively large production tolerance without the above affecting the clamping connection between the articulation surfaces.

Abstract: A femoral neck fixation prosthesis and method of using same which reduces bone loss and the avoids the other shortcomings of the prior art by allowing the fixation of a stable femoral head replacement while reducing the amount of the femur which must be reamed for the insertion of the prosthesis. The preferred embodiment provides that the femoral head is attached to a fixation prosthesis which extends coaxially through the canal of the femoral neck, into the femur, and is then attached to the opposite lateral wall of the femur. In this manner, the prosthesis serves to imitate the original structure of the femoral neck. No other support members, either crosspins or arms extending into the length of the femur, are required.

Abstract: An articulating hemiarthroplasty prosthesis (10) for use in arthroplasty is provided. The prosthesis includes a stem (12) for implantation at least partially within the medullary canal (14) of a long bone (16) and a collar (20). The collar (20) is operably associated with the stem (12) and extends outwardly therefrom. At least a portion of the collar (20) includes a resorbable material. The prosthesis includes a head (30) and a cup (46) for engagement with the head(30).

Abstract: A bone stabilizing apparatus includes a stem member and an extension member, the stem member having a distal end for insertion within the intramedullary canal of a human humerus and the proximal end connected to the extension member. The extension member has radially directed threaded holes either pre-formed or created after the bone stabilizing apparatus is installed into the humerus. The threaded holes allow fixation of stabilizing screws with suture posts, or a washer structure to grip the surface of the bone and/or surrounding ligaments or muscle. A prosthetic or the natural humeral head can be attached to the extension member. In a preferred embodiment a guide structure directs the drill and stabilizing screws radially through the central axis of the extension member.