Abstract: Improved osseointegration devices and structures, including such structures that can be used in connection with prosthetic limbs. Examples include a self-centering implant/nut configuration, a centering device, a tapered mounting screw hole, a coupling device, and an aiming device. The devices are highly efficacious. For example, they can be secured with minimal residual bone, and may be removed without significant bone destruction.

Abstract: A method of ankle replacement includes forming an anterior cut in a bone and forming a stem hole in a distal end of the bone. The stem hole is formed using a plurality of broaches positioned against the distal end of the bone through the anterior cut. A first portion and a second portion of a stem implant are inserted into the stem hole through the anterior cut in the bone. The first portion is coupled to the second portion using a coupling device inserted through the anterior cut in the bone. The stem implant is impacted into the stem hole using an offset impactor.

Abstract: A stem for a hip prosthesis, with fixed or modular neck, which includes a stem body divided into a proximal region and a distal region, the body of the stem forming an anterior wall, a posterior wall, a medial wall, and a lateral wall. The anterior wall, the posterior wall, and the medial wall are provided at least partially with a porous structure with undercuts, the lateral wall being provided with a machining allowance.

Abstract: Systems for joint arthroplasty include prostheses which are secured to bone with sliding anchors. Examples include unicondylar and bicondylar knee prostheses for hemi-arthroplasty and total arthroplasty. Instruments guide the anchors into proper engagement with the prosthetic components. Methods of using the prostheses and instruments are disclosed.

Abstract: A modular transdermal assembly configured to couple an external prosthetic device to a bone stump. The assembly includes a modular transdermal portion and a bone fixator. The modular transdermal portion includes an interface portion configured to couple with the external prosthetic device. The bone fixator is configured to be secured to the bone stump and couple with the modular transdermal portion to retain the modular transdermal portion relative to the bone stump.

Abstract: A method for assisting a user with surgical implementation of a preoperative plan includes generating a physical native tissue model of a native patient tissue. The physical native tissue model includes at least one primary patient tissue area including a surface of interest, at least one secondary patient tissue area including no surfaces of interest, and a base surface for engaging a supporting structure. The physical native tissue model, as generated, includes at least one information feature providing clinically useful information to the user. The information feature is substantially separated from the surface of interest. An apparatus for assisting a user with surgical implementation of a preoperative plan is also provided.

Abstract: Modular humeral implants and methods of use. A humeral implant can include a stem portion, a metaphyseal portion, a locking element, and an intermediate portion. The intermediate portion can include at least one spacer. Each spacer can include a proximal engagement feature, a distal engagement feature, a lumen extending longitudinally through the spacer, and a pin slidable within the lumen of the spacer. Distal movement of a locking element in the metaphyseal portion can translate the pin of each spacer to secure the metaphyseal portion, the intermediate portion, and the stem portion in a locked configuration.

Abstract: Methods and devices are provided for preparing and implanting tissue scaffolds. Various embodiments of scribing tools are provided that are configured to mark one or more predetermined shapes around a defect site in tissue. The shape or shapes marked in tissue can be used to cut a tissue scaffold having a shape that matches the shape or shapes marked in tissue. In one embodiment, the scribing tool used to mark a shape in tissue can also be used to cut the tissue scaffold.

Abstract: A femoral implant (10) comprises a distal end and a proximal end. A stem (12) is provided at the distal end of the implant (10) and comprises a rounded tip (16) for insertion into a femur, in use, and a body (18) of generally tapering form extending in a distal direction from a base to the tip (16). A femoral head (14) is provided at the proximal end of the implant (10) and extends from the base (20) of the stem (12). The body (18) of the stem (12) includes a plurality of discrete steps (22, 24, 26, 28, 30), located between the tip (16) and the base (20), and the steps (22, 24, 26, 28, 30) are concentrated more towards the base (20) of the stem (12) than towards the tip (16).

Abstract: A joint prosthesis system, specifically a shoulder prosthesis, for shoulder replacement, revision and repair. The implants provide fixation into the best bone available to a surgeon. The implants are used in a superior-inferior and anterior-posterior construct forming a type of cross or X-shape. The implants allow for interchangeability of the articulating component as well as rotational orientation. The systems will allow for augments to accommodate bone loss. The implants may allow for additional security using screws or anchors inserted into the scapula.

Abstract: A prosthesis system for replacement of a head portion of a proximal radius can include an articulation component having a first connection portion. A first head component can have a second connection portion that connects to the first connection portion. A second head component can have a third connection portion that connects to the first connection portion. The second head component can have a distinct dimension from the first head component. A stem component can include a fourth connection portion that connects with either of the first or second head components. The stem component can have a stem anchoring portion that connects to the radius.

Abstract: Embodiments of the invention include an implantable force distribution boot with hydraulic features that mimic the natural hydraulics of a joint. Further embodiments include an exterior prosthetic leg device having intermittent and/or variable electromagnetic features that can engage with magnetic blades on the implantable force distribution boot. In use, the exterior prosthetic leg can be maintained on a residual limb by magnetic force between the implanted blades and the exterior electromagnets. Also disclosed are surgical techniques for preparing a residual limb to better receive and adapt to a prosthetic device. The techniques include an improved surgical method for harvesting a vascularized glabrous skin free flap.

Abstract: Methods of utilizing implant devices for the repair of articular cartilage defects are provided herein. The implant devices have circular, or oblong, articular ends. The articular ends have a convex upper face and a concave lower face, the convex upper face blending to the concave lower face, and the concave lower face having a curvature less than the curvature of the convex upper face. The implant devices further have a stem extending from the concave lower face away from the upper face, the stem having a maximum radius at the convex lower face and tapering to lesser radius along the length of the stem.

Abstract: Implant devices having an articular end for repair of articular cartilage defects are provided. The articular end has an oval perimeter, a convex upper face, and a concave lower face. The convex upper face has a first circular pitch radius and a first circular roll radius. At least a portion of the concave lower face has a spherical radius, the convex upper face blending into a rim, wherein at least a first and second portion of the rim extends at least a first distance along a vertical axis and a third and fourth portion of the rim tapers inward along the vertical axis, the rim blending into the concave lower face. The articular cartilage implant devices further include a stem extending from the concave lower face away from the convex upper face along the vertical axis. The stem has a plurality of oval shaped perimeters along the vertical axis.

Abstract: A locking implant is provided for a long bone. The locking implant comprises a head portion, a stem portion extending from the head portion, and an anchor disposed at an end of the stem portion for engagement within a resected long bone. The anchor defines at least one locking feature, such as a cam, configured to engage an interior of the resected long bone upon rotation of the implant, thereby locking the head portion to the long bone. The implant may comprise a two component modular design. Methods of locking the implant to a long bone structure are also provided.

Abstract: An implant assembly for a long bone is adapted to support an exo-prosthesis. The assembly includes a stem, a subdermal component and a percutaneous post. The stem has a proximal end that is adapted to be received in a surgically prepared medullary canal of the long bone, and a distal end having a surface that is adapted to promote bone ingrowth. The subdermal component includes a proximal portion that is adapted for attachment to the distal end of the stem, and a fixation surface that is adapted to promote soft tissue fixation. The percutaneous post has a proximal end that is adapted to be attached to the subdermal component.

Abstract: An implant system for securing a prosthesis to a selected bone of a subject including a stem and an abutment. The stem includes a porous region that promotes osseointegration of the selected bone following implantation of the stem. The abutment is secured to the stem and is configured for secure attachment to the prosthesis. The stem and the abutment include ultra-low friction and/or highly polished surfaces at select locations that inhibit bio-adhesion.

Abstract: A connecting device of joint prosthesis includes a stem means provided for being inserted into a medullary cavity of a bone, a receiving means provided for receiving a bone structure near the bone, an offset connecting means connected between the stem means and the receiving means, and an inserting member. The offset connecting means includes a first connecting component and a second connecting component. The inserting member inserts into an inserting bore of the first connecting component and an inserting recess of the second connecting component to make the first connecting component being fixed and positioned at the second connecting component, wherein there is an offset distance between the longitudinal central axis of the first connecting component and the longitudinal central axis of the second connecting component. Thereby the connecting device of joint prosthesis is adjustable for fitting individual patients with more effect in regard of the musculoskeletal mechanics.

Abstract: A prosthesis suited for orthopedic implantation possesses a multi-piece stem component that supports an artificial joint surface that can articulate with another artificial joint surface in various ways. The prosthesis can be assembled in a snap fit and/or interlocking fashion that provides positive locking means without the use of screws or other fasteners. The prosthesis can accommodate fitment of a plastic joint surface made, e.g., from ultra high molecular weight polyethylene. The prosthesis is well suited for use in an ankle replacement system that can be installed using minimally invasive intramedullary guidance established with respect to the major axis of the tibia by minimally invasive access through the calcaneus, through an incision in the bottom of the foot. The prosthesis makes possible the installation of a total ankle system using minimally invasive anterior access to the ankle joint for making bony cuts and to install prosthesis components.

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 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 prosthetic system that includes a prosthetic implant and a support structure secured to an inner surface of a cavity of a bone is disclosed. The support structure defines a channel that extends through the length of the support structure. The prosthetic implant is received in the channel, and a portion of the prosthetic implant is secured to an inner surface of the support structure by an adhesive. The support structure may comprise a pair of partially hemispherical components arranged in spaced apart relationship thereby defining the channel between the pair of components.

Abstract: A seal for preventing a bodily fluid from penetrating an orthopedic implant comprising a tapered section adapted to conformingly mate to a stem of a first implant component, and a collar section extending from and circumferentially surrounding a portion of the tapered section, the collar section adapted to mate to a base of a second implant component such that the tapered section and collar section define an opening therethrough configured to receive the first implant component.

Abstract: A trial instrument assembly for use in a surgical procedure to replace an orthopaedic joint includes a trial implant having a stem portion for fitting within a prepared cavity in the patient's bone. The stem portion defines a stem axis. A neck portion is connected to the stem portion to protrude from the cavity when the stem portion is within the cavity. The assembly includes a plane guide that extends from the neck portion in a plane that is selected from (i) a plane perpendicular to the stem axis, and (ii) a plane parallel to the stem axis, for use in determining the location of the trial implant relative to an anatomical feature in a direction measured along the stem axis or perpendicular to the stem axis, respectively.

Abstract: An implant sleeve operable to center an implant at an implantation site. The implant sleeve includes a proximal end, a distal end, an annular sidewall, a mesh portion of the annular sidewall, and an interior area. The annular sidewall is between the proximal end and the distal end. The mesh portion defines a plurality of openings in the annular sidewall. The interior area is defined by the annular sidewall and is configured to receive a stem of the implant. A longitudinal axis of the implant sleeve extends along an axial center of the interior area. In response to force applied to the implant sleeve, the implant sleeve compresses and the mesh portion expands outward from the longitudinal axis.

Abstract: A muscle fastening cap includes a head having one or more groups of openings along a direction of its axial length. The cap also may include a stem adapted for insertion into a muscle-supporting structure such as an intramedullary canal or a prosthesis device.

Abstract: According to various embodiments, provided is a prosthesis system for replacement of a head portion of a proximal radius. The system can include a first polymeric articulation component having a first locking portion and a metal head component having a second locking portion. The second locking portion can mate with the first locking portion to form a first locking mechanism to initially couple the first articulation component to the head component. The head component can define a locking channel. The system can also include a stem component having a protrusion receivable in the locking channel. The protrusion can define a bore, and the stem component can be adapted to be coupled to the radius. The system can also include a fastener received through the locking channel and into the bore to provide a second locking mechanism that couples the head component to the stem component.

Abstract: A hip prosthesis includes an acetabular cup and a femoral component comprising a head and a stem, wherein the stem comprises a truss structure, the truss structure comprising a space truss comprising a plurality of planar truss units having a plurality of struts joined at nodes, wherein the web structure is configured to interface with bone tissue.

Abstract: The invention relates to a joint part prosthesis, particularly for a finger joint, consisting of either a proximal or a distal component, as well as a shaft that extends away from this component, to be mounted in a bone, which shaft is configured with a fin-like anti-twist device. According to the invention, it is provided that as an anti-twist device (7), at least two anti-twist elements (8) are disposed on the mantle surface (6) of the shaft (4), with rotation symmetry, and extend radially away from this mantle surface (6) and in the longitudinal direction of the shaft (4), whereby the distance of the anti-twist elements (8) from the mantle surface (6) decreases slightly in the direction toward the free end (5) of the shaft (4).

Abstract: A ready-for-use polymer cement spacer device for the replacement of a permanent joint prosthesis during a two-stage replacement, includes a shank includes for attachment for placing to the supporting bone and a head in the joint region. The spacer device includes two complementary members incorporating rigid members for assembly between them, the first member being loaded with a first active substance and the second member being loaded with a second active substance. The first and second active substances are preferably antibiotics, selected from gentamycin, trobamycin, vancomycin, erythromycin, fucidin, tetracycline or other suitable antibiotics. The temporary joint implant maintains a suitable space for the time necessary for the operation of replacing a permanent prosthesis to prevent tissues from occupying the space released by removal of the permanent prosthesis and ensures effective treatment of resistant infections by local treatment of the joint area through at least two different active substances.

Abstract: A femoral prosthesis. The femoral prosthesis includes an implant body having a proximal end and a distal end and a shoulder at the proximal end, the shoulder being structured and dimensioned for a tight press fit into the neck of a femur. The implant body includes a trunk at the distal end, the trunk having a wedge formed by a tapered portion extending in the direction of the distal end of the implant body. The implant body also includes a medial column extending from the shoulder toward the distal end and a lateral column extending from the shoulder toward the distal end. The wedge, the medial column, and the lateral column to provide multi-planar stability for the implant body and surface area for fixation of the implant body.

Abstract: A prosthesis is provided for replacing a portion of a bone making up a joint. The prosthesis is adapted, intraoperatively, to optimize the anatomical alignment of the prosthesis in the joint. In particular, a jig is used to identify the axis of rotation of the joint intraoperatively and to align a portion of the prosthesis with the identified axis. The angle of the head of the prosthesis is adjusted to optimize contact with the appropriate corresponding portions of the joint, at which point the position of the head is fixed to prevent further rotation of the head relative to the remainder of the prosthesis.

Abstract: A method of performing joint arthroplasty on a patient with a bone fragment of a bone at least partially separated from the bone in one embodiment includes providing a prosthetic component with a bone connecting portion and a bone fragment portion, implanting the bone connecting portion of the prosthetic component in the bone, and attaching the bone fragment to the bone using the bone fragment portion.

Abstract: A technique to manufacture small joint orthopedic implants includes the steps of taking standard radiographs of a pathologic joint and the corresponding non-pathologic joint. In order to provide an accurate frame of reference, a specialized marker is placed in the radiographic field. By inspection of the radiographs and by comparison with the marker, the dimensions of the cortical bone and the cancellous bone can be quickly and accurately determined. These dimensions can be used to manufacture a suitable implant and installation tool. Typically, the implant will include a stem from which a post projects. A radially extending collar is located at the intersection between the stem and the post. A mating head is attached to the post. The head closely approximates the size and shape of the natural head being replaced. The stem will be non-round in cross-section to prevent rotation of the stem in the bone.

Abstract: Modular bone implants, modes of assembly, and their method of use are presented.

Abstract: A prosthesis humeral implant has a stem including a coupling element at a proximal end thereof and a head having a coupling element at a distal portion thereof for coupling to the stem portion coupling element. The head has a bearing surface portion for articulating on a prosthetic glenoid and a base portion. A soft tissue attachment element has an L-shape with a mounting flange portion of the L-shape extending and clamped between the bearing portion and base portion. The soft tissue attachment portion has a portion extending proximally from the mounting flange portion. The soft tissue attachment element mounting portion is captured between the head bearing portion and base portion preferably by clamping or being permanently attached to one of the base or bearing portions during manufacture.

Abstract: The invention relates to a prosthesis for implantation into a long bone during joint arthroplasty, particularly Total Shoulder Arthoplasty and Total Hip Arthroplasty, and a method for use of the implant.

Abstract: An artificial joint implant in use with a bone and including a three dimensional shaped body have an exterior configured and joint defining face. An annular shaped recess is formed within a seating location of the implant for securing the body over a sectioned end of the bone. A stem extends from the body inwardly within the bone and exhibits at least one support for engaging an inner bone surface and in order to maintain the implant in secured fashion to the bone.

Abstract: Implant devices, and method of using the same, are provided. The implant devices have circular, or oblong, articular ends. The articular ends have a convex upper face and a concave lower face, the convex upper face blending to the concave lower face, and the concave lower face having a curvature less than the curvature of the convex upper face. The implant devices further have a stem extending from the concave lower face away from the upper face, the stem having a maximum radius at the convex lower face and tapering to lesser radius along the length of the stem.

Abstract: An artificial joint fixation mechanism has a base for being attached to an artificial joint, a stem for guiding an artificial joint to engage with a human bone, and a sleeve. The base defines a conic shaft hole therethrough. At least a positioning section and at least a threaded section are extended adjacent an end of the shaft hole. The stem includes an engaging pole at an end thereof for jointing to an artificial joint. The sleeve is threaded for screwing to the threaded section and defines an inner cone hole therethrough. In use, the engaging pole of the stem implants into the shaft hole. The sleeve is screwed to the threaded section, and the inner cone hole reversely pressing against the guiding section. Thus the stem is pressed reliably.

Abstract: An implant assembly comprises a stem and an augment. The augment includes a porous outer region which is integrally formed onto a solid inner region. The augment further includes, solid posts integrally formed on the solid inner region and extend through the porous outer region to the outer surface of the augment. The posts are integrally formed with and surrounded by the porous region and are designed to allow assembly of the augment to the stem without damaging the structure of the porous region. A method of attaching the augment is described, wherein a tool is designed to grip to posts of the augment and apply loads through these posts during assembly.

Abstract: A system for securing a prosthesis in a bone includes a reference anchor for insertion into a cavity of a bone to define a reference point during prosthesis implantation, the reference anchor including a body having a mating feature and a gripping projection for engaging an inner surface of the bone cavity. The system also includes a stem having a terminal end adapted to mate with the engagement feature of the reference anchor such that the stem is disposed at a desired position relative to the reference point.

Abstract: A method for arthroplasty includes using a self-locking prosthesis that has a member structured to transfer a load produced by the weight of a patient to a bone. An expandable bone-locking portion that is integral to the member includes a shape-memory material and expands to produce a locking force. A portion of the bone is removed to form an aperture in the bone. The bone-locking portion is inserted into the aperture, and a temperature increase causes a change from a contracted state to an expanded state resulting in expansion of the bone-locking portion so as to contact the inner surface. The expanding is sufficient to create a locking force at the junction between the inner surface and the bone-locking portion of the prosthesis and the majority of the locking force is applied at or above the metaphysis. The length/width ration of the prosthesis may be less than or equal to 5. The resulting reconstructed long-bone may have improved primary and long-term stability.

Abstract: A spacer is used in a damaged bone to provide a contact surface that complements the shape of a cooperating bone so a corrective arthrodesis may be performed across the two bones. The spacer further may restore the length and, preferably, the shape of the damaged bone, particularly when a discrete bone segment has been removed. The spacer has a base having the length and shape of the removed bone segment, and a stem attached to the base for securing the spacer to the damaged bone. The spacer may have one or more fixation channels for receiving fixation devices, such as k-wires or bone pins. In a method of using the spacer, gradual osteotomies are performed on the damaged bone until bleeding bone is obtained. A stem hole is drilled to receive the stem, and the spacer is inserted and aligned with the damaged and cooperating bones.

Abstract: A muscle fastening cap includes a head having one or more groups of openings along a direction of its axial length. The cap also may include a stem adapted for insertion into a muscle-supporting structure such as an intramedullary canal or a prosthesis device.

Abstract: A transcutaneous port includes a subcutaneous port section and a bone fixation section. The subcutaneous port section has upper portion which has an axial channel and a first micro-textured external surface, and a lower portion which has therein a transverse channel connecting to the axial channel. The bone fixation section has a transosseous collar portion which has a second micro-textured external surface, and a threaded shaft portion. The first and second micro-textured external surfaces include a multiplicity of alternating microgrooves and ridges for tissue and bone integration. The transcutaneous port is surgically implanted into a site of a patient and a conductive wire is introduced from the axial channel to the transverse channel, and placed in the subcutaneous soft tissue and in contact with a neural signal source for transmitting neural signals to a prosthetic motor device.

Abstract: A prosthetic system that includes a prosthetic implant and a support structure secured to an inner surface of the cavity in the end of the bone is disclosed. The support structure defines a channel that extends through the length of the support structure. The prosthetic implant is received in the channel, and a portion of the prosthetic implant is secured to an inner surface of the channel by an adhesive. The stem of the prosthesis beyond the channel may be cemented or uncemented. The support structure may have an approximately funnel shape. The support structure may be a hollow porous cylindrical sleeve. The support structure may comprise a pair of partially hemispherical components arranged in spaced apart relationship thereby defining a channel between the pair of components. The support structure may comprise a plurality of pedestals secured to the inner surface of the cavity of the bone.

Abstract: An intramedullary implant for mounting within an intramedullary canal of a bone is disclosed. The intramedullary implant includes a lower stem portion, an upper stem portion, and a modular sleeve body. The modular sleeve body is connected to one of the lower stem portion or the upper stem portion. The sleeve body includes an inner portion that covers at least a segment of the upper stem portion and has one or more longitudinally extending bone engagement members for engagement with the bone.

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 method for arthroplasty includes using a self-locking prosthesis that has a member structured to transfer a load produced by the weight of a patient to a bone. An expandable bone-locking portion that is integral to the member includes a shape-memory material and expands to produce a locking force. A portion of the bone is removed to form an aperture in the bone. The bone-locking portion is inserted into the aperture, and a temperature increase causes a change from a contracted state to an expanded state resulting in expansion of the bone-locking portion so as to contact the inner surface. The expanding is sufficient to create a locking force at the junction between the inner surface and the bone-locking portion of the prosthesis and the majority of the locking force is applied at or above the metaphysis. The length/width ration of the prosthesis may be less than or equal to 5. The resulting reconstructed long-bone may have improved primary and long-term stability.