Abstract: A posterior stabilized knee orthopaedic prosthesis includes a tibial bearing and a femoral component configured to articulate with the tibial bearing. The tibial bearing includes a spine having a concave cam surface and a convex cam surface. The femoral component includes a posterior cam having a concave cam surface and a convex cam surface. During flexion, the concave cam surface of the posterior cam contacts the convex cam surface of the spine and the convex cam surface of the posterior cam contacts the concave cam surface of the spine.

Abstract: The present disclosure provides a provisional tibial prosthesis system for a set of prosthetic knee joints for implantation in a natural knee, the provisional tibial prosthesis system including a bearing component and a bearing support, the spacing of the bearing component from the bearing support is adjustable to allow for representation of a variety of different sized final tibial prostheses. In this system, only one provisional bearing component corresponding to each level of constraint is needed and shims are used to adjust the spacing of the bearing component from the bearing support. The shims are slidably insertable between the bearing component and the bearing support in an anterior/posterior direction to allow for adjustment of the spacing of the bearing component from the bearing support. The number of provisional components needed during knee surgery is reduced and adjustment of the system only requires the knee joint to be distracted by a distance equal to the height of a particular shim.

Abstract: Methods and apparatuses for attaching tissue structures to orthopedic implants. In one exemplary embodiment, the methods and apparatuses are used to attach soft tissue and/or bone to a proximal tibial implant. In another exemplary embodiment, the methods and apparatuses are used to attach soft tissue and/or bone to a proximal femoral implant.

Abstract: A replacement knee implant has a femoral implant and a tibial implant, each of which are inset in a bone surface. The tibial implant is generally elongated with one end rounded and an opposite end conforming to the shape of the tibia, and is made of a metal alloy or a ceramic. The upper surface is dished while the lower surface is planar and can be parallel or sloped relative to the upper surface, and can have a keel for fixation. The femoral implant for implementation in a femoral condyle is rounded such that, when implemented, the femoral implant is flush at the anterior and posterior sides and protruding away from the femur between the anterior and posterior ends. The femoral implant can have an elongated keel for extending into the femur, and can be made from a highly cross-linked polyethylene.

Abstract: An implantable orthopaedic knee prosthesis includes a component that is configured to be coupled to a surgically-prepared bone. A fixation side of the component includes a fixation surface that has an angled cement pocket formed therein.

Abstract: A method for reconstructing a knee ligament and for performing a tibial osteotomy on the knee in a single procedure, the method comprising: forming a bone tunnel through the tibia at a location appropriate for the ligament reconstruction, disposing a graft ligament in the bone tunnel, and securing the graft ligament in the bone tunnel, and forming a wedge-like opening in the bone at a location appropriate for the tibial osteotomy, positioning an osteotomy implant in the wedge-like opening in the bone, and securing the osteotomy implant in the wedge-like opening in the bone; wherein the osteotomy implant is secured in the wedge-like opening in the bone with a fastener which extends through the implant and into the bone tunnel.

Abstract: An orthopaedic tibial prosthesis includes a tibial baseplate sized and shaped to cover substantially all of a resected proximal tibial surface, and a tibial bearing component sized to leave a posteromedial portion of the tibial baseplate exposed when the tibial bearing component is mounted to the baseplate. The exposed posteromedial portion of the tibial baseplate includes a chamfered profile which cooperates with a correspondingly chamfered profile at a posteromedial edge of the tibial bearing component to create a substantially continuous chamfer extending from the resected tibial surface to the medial articular surface of the tibial bearing component. Advantageously, this chamfer leaves an absence of material (i.e., a relief or void) at the posteromedial edge of the tibial prosthesis, thereby enabling deep flexion of the prosthesis without impingement between the tibial prosthesis and adjacent anatomic tissues or prosthetic structures.

Abstract: A tibial insert includes a platform defining an upper bearing surface and a bottom surface. A keel of the tibial insert is coupled to the bottom surface of the platform and a rod of the tibial insert extends through a portion of the keel. A surgical method for knee arthroplasty is also disclosed.

Abstract: A replacement knee implant has a femoral implant and a tibial implant, each of which are inset in a bone surface. The tibial implant is generally elongated with one end rounded and an opposite end conforming to the shape of the tibia, and is made of a metal alloy or a ceramic. The upper surface is dished while the lower surface is planar and can be parallel or sloped relative to the upper surface. The femoral implant for implementation in a femoral condyle is rounded such that, when implemented, the femoral implant is flush at the anterior and posterior sides and protruding away from the femur between the anterior and posterior ends. The femoral implant can have an elongated keel for extending into the femur, and can be made from a highly cross-linked polyethylene.

Abstract: A knee joint prosthesis for implantation to replace a portion of a knee joint. The knee joint prosthesis includes a tibial tray and a bearing member that engages the tibial tray. The prosthesis also includes an insert with a base that is fixed to the bearing member and an extension portion that extends away from the bearing member and the tibial tray. The extension portion has an axis, and the extension portion includes a threaded portion. The prosthesis further includes a post that is rotatably coupled to the extension portion, and the post is rotatable about the axis of the extension portion relative to the insert. Furthermore, the prosthesis includes a retention member that threadably couples to the threaded portion of the insert to limit movement of the post along the axis away from the bearing member and the tibial tray.

Abstract: A knee arthroplasty prosthesis includes a femoral component having multiple pieces with engagement means provided for engaging various pieces of the femoral component to one another following their insertion in the incised area of the femur. A tibial component includes multiple pieces designed for assembly following positioning in the incision. The tibial component includes a Morse taper cavity on one piece of the tibial component and a Morse taper extension on another member of the component for receipt therein.

Abstract: An osteotomy plate for maintaining the spacing of a wedge-like opening in bone, the osteotomy plate comprising: a body having a front side and a back side; a protrusion extending out of the back side of the body for disposition in the wedge-like opening; and a plurality of mounting holes for receiving fixation screws therein, the mounting holes being formed in the body such that when the protrusion is disposed in the wedge-like opening, the mounting holes direct the fixation screws into bone on either side of the wedge-like opening.

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

Abstract: A tibial insert includes a platform defining an upper bearing surface and first and second keels extending downwardly from the platform. Each of the first and second keels includes an angled anterior face. A surgical method for knee arthroplasty is also disclosed.

Abstract: A tibial knee joint prosthesis for attachment to a suitably prepared tibial bone, providing bearing portions in the lateral and medial compartments. The lateral and medial bearing surfaces of the component are inclined at different angles in the anterior to posterior direction of the knee, so that when mounted to the tibia, the lateral bearing surface of the prosthesis is higher than the medial bearing surface to the posterior side of the knee. In this way the lateral ligament is tightened progressively more than the medial ligament as the knee moves from extension to flexion, resulting in increased stability in the lateral compartment.

Abstract: A prosthetic knee system includes a tibial tray, a non-rotating tibial insert, and a rotating tibial insert. The non-rotating tibial insert and the rotating tibial insert are selectively coupleable to the tibial tray such that a fixed or a mobile orthopaedic prosthesis may be configured. In some embodiments, the tibial tray may be a fixed or mobile tibial tray. Additionally, in some embodiments, the prosthetic knee system may include a femoral component.

Abstract: An orthopaedic tibial prosthesis includes a tibial baseplate with an asymmetric periphery which promotes proper positioning and orientation on a resected tibia, while also facilitating enhanced kinematics, soft-tissue interaction, and long-term fixation of the complete knee prosthesis. The asymmetric baseplate periphery is sized and shaped to substantially match portions of the periphery of a typical resected proximal tibial surface, such that proper location and orientation is evident by resting the baseplate on the tibia. The baseplate periphery provides strategically positioned relief and/or clearance between the baseplate periphery and bone periphery, such as in the posterior-medial portion to prevent deep-flexion component impingement, and in the anterior-lateral portion to avoid undue interaction between the anatomic iliotibial band and prosthesis components.

Abstract: An orthopaedic tibial prosthesis includes a tibial baseplate with an asymmetric periphery which promotes proper positioning and orientation on a resected tibia, while also facilitating enhanced kinematics, soft-tissue interaction, and long-term fixation of the complete knee prosthesis. The asymmetric baseplate periphery is sized and shaped to substantially match portions of the periphery of a typical resected proximal tibial surface, such that proper location and orientation is evident by resting the baseplate on the tibia. The baseplate periphery provides strategically positioned relief and/or clearance between the baseplate periphery and bone periphery, such as in the posterior-medial portion to prevent deep-flexion component impingement, and in the anterior-lateral portion to avoid undue interaction between the anatomic iliotibial band and prosthesis components.

Abstract: The present invention relates to a tibial prosthesis useful in knee replacement surgeries. The prosthesis includes one or more cement introduction ports which may be used to deliver and control delivery of bone cement to a prosthesis-bone interface after the prosthesis has been positioned on a resurfaced area of a tibia bone. The prosthesis is suitable for implantation using arthroscopic as well as open surgical procedures. The prosthesis may be used as a unicondylar implant in either compartment of the knee or in both compartments of the knee.

Abstract: A knee arthroplasty prosthesis includes a femoral component having multiple pieces with engagement means provided for engaging various pieces of the femoral component to one another following their insertion in the incised area of the femur. A tibial component includes multiple pieces designed for assembly following positioning in the incision. The tibial component includes a Morse taper cavity on one piece of the tibial component and a Morse taper extension on another member of the component for receipt therein.

Abstract: A tibial tray assembly includes a platform having a stem extending downwardly from a bottom surface and a stem extension couple to the an end of the stem. The stem extension is electrically insulated from the stem. The tibial tray assembly also includes a wireless communication device configured to transmit data using the stem extension as an antenna.

Abstract: An orthopaedic prosthesis includes a tibial bearing and a femoral component configured to articulate with the tibial bearing. The tibial bearing and the femoral component are configured to promote outward axial rotation of the femoral component with respect to the tibial component during knee flexion.

Abstract: Orthopaedic assemblies including a tibial component and one of a fixed tibial insert or a rotatable tibial insert. The assemblies may include structure to prevent undesired movement between the tibial component and insert. For example, a retaining tab may be provided on the tibial component that couples to a tab opening on a surface of the tibial insert (either the fixed or rotatable insert). When assembled, the retaining tab may be covered to avoid possible irritation to the patient's surrounding anatomy. The fixed tibial insert may be provided with a tab opening that provides a minimal amount clearance with the retaining tab to help prevent rotation of the fixed tibial insert. The rotatable tibial insert may be provided with a tab opening with more clearance with the retaining tab to allow at least some rotation with the tibial component.

Abstract: Prosthesis for implantation in the knee having a tibial component for attachment to the tibia. The tibial component has a first, upper surface and a second, lower surface opposite the first surface for attachment to the tibia. The first surface includes a lateral bearing region having a convex form and a medial bearing region having a flat form, arranged such that the respective angles of inclination in sagittal planes of the lateral and medial bearing regions of the component in situ when fitted to the tibia are different.

Abstract: A method for performing a high tibial, dome osteotomy to adjust the lateral and/or angular disposition of the tibial plateau relative to the lower portion of the tibia, the method comprising: forming an arcuate osteotomy cut in the tibia to subdivide it into upper and lower portions; manipulating the upper and lower portions to adjust their lateral and/or angular dispositions relative to one another; forming a pair of keyholes along the osteotomy cut; forming a keyhole slot to connect the two keyholes; forming a fixation hole in the tibia for each keyhole; providing an implant comprising a pair of keys connected by a bridge, each key comprising a bore for receiving a fixation screw therein; inserting the implant so that the keys are disposed in the keyholes, and so that the bores of the keys are aligned with the fixation holes; and inserting fixation screws through the bores of the keys and into the fixation holes of the keyholes so as to stabilize the upper and lower portions of the tibia.

Abstract: Surgical methods and tibial implants (46) for accommodating the anterior cruciate ligament (ACL) during unicompartmental or bi-unicompartmental knee arthroplasty procedures.

Abstract: A prosthetic knee joint includes: (a) a femoral member comprising rigid material with a convex, wear-resistant femoral contact surface including a convex ridge; (b) a tibial assembly including: (i) at least one cup comprising rigid material with a body and a rim substantially thicker than the body defining a wear-resistant cup contact surface; (ii) a rigid base; and (iii) a spring support interconnecting the cup and the base, the spring support elastically deflectable permitting controlled pivoting of the at least one cup; (c) wherein the cup contact surface bears against the femoral contact surface, transferring axial and lateral loads between the cup and femoral member, while allowing pivoting between the cup and femoral member; and (d) wherein the at least one cup allows the rim to deform elastically, permitting the cup contact surface to conform in an irregular shape to the femoral contact surface, when the knee joint is loaded.

Abstract: An orthopedic augment member and connection to an implant is disclosed. The connection may be formed between the implant, comprising a recess with a ledge formed therein, and the augment member by utilizing a fastener, and a connector, which may be configured and dimensioned to snap-fit into the recess formed in the implant forming an interference fit therebetween. The fastener may further comprise a body member with threads located thereon for matingly engaging a threaded wall defining a recess formed in the augment member, thereby securing the augment member to the recess of the implant.

Abstract: An implant for bone re-surfacing in a joint, the implant having a bearing platform having a front surface which forms a bearing surface and a back surface, and securing apparatus projecting from the back surface, the securing apparatus having a locking surface arranged to bear against an undercut surface of the bone to secure the implant against the bone.

Abstract: Various assemblies for replacing at least a proximal portion of a tibia are provided. One assembly includes a tibial tray including a superior bearing engaging surface and an inferior bone engaging surface and having a truncated posterior region; a bearing including an articulating surface, a tray mating surface, and an overhang. The tray mating surface of the bearing is in mating engagement with the inferior bone engaging surface of the tibial tray such that the overhang of the bearing extend beyond the tibial tray truncated posterior region. Related surgical methods are also provided.

Abstract: A nonmodular tibial prosthesis having a retainer for a modular bearing on the superior surface of a tibial base, a nonmodular primary bearing directly molded to the base, and a mechanical release member mounted on the tibial base in contact with the nonmodular primary bearing. The release member includes a wedge portion with a superiorly posteriorly inclined face, and is designed to be driven anteriorly upon actuation so as to force the primary bearing off of the tibial base, after which the primary bearing and release member are removed and replaced with a modular bearing.

Abstract: Methods and apparatuses for attaching soft tissue and bone to orthopaedic implants. The orthopaedic implants are provided with a woven ingrowth material to facilitate attachment of soft tissue and bone thereto. In one embodiment, the woven ingrowth material is formed as a patch or region of woven material attached to the implant. In another embodiment, a sleeve formed of woven ingrowth material encompasses the majority of the implant.

Abstract: A prosthetic joint assembly supports articulation of a joint. The joint assembly includes a first component configured to be fixed to an anatomical feature. The first component includes a first impact surface and a second component that engages the first component. The second component includes a second impact surface that impacts the first impact surface as the first component moves relative to the second component. Furthermore, at least one of the first impact surface and the second impact surface includes a dampening member that dampens energy resulting from impact of the first and second impact surfaces.

Abstract: A patient-specific augment can be attached to an implant component for a bone of a joint of a patient. The patient-specific augment has first and second surfaces. The first surface is a three-dimensional patient-specific surface that closely matches and can mate to a substantially unaltered and unresected surface of a bone defect of the specific patient only in one position. The second surface is designed to engage a non-custom surface of the implant.

Abstract: Certain embodiments generally provide an improved tibial base member comprising keel portions that allow one or both cruciate ligaments to be preserved. Other embodiments provide improved lateral and/or medial inserts having a mesial lip that helps relieve and/or prevent impingement between the femoral component and the tibial eminence. Other embodiments provide improved femoral components having various chamfers to provide additional clearance with respect to the tibial eminence and posterior cruciate ligament without decreasing bone coverage.

Abstract: An orthopedic implant includes a first portion including at least one feature modified to be patient-specific and match the anatomy of a specific patient from a three-dimensional digital image of a patient's joint using computer modeling. The orthopedic implant includes a non-custom inner bone-engaging surface including a plurality of planar surfaces configured for engagement with non-custom bone cuts.

Abstract: An implantable device includes a first implant component implantable into a first bone portion, a second implant component implantable to a second bone portion and a third implant component comprising a shape-memory polymer. The second implant component is telescopically coupled to the first component. The third implant component is held between the first and second components. The third implant component passively expands from a first dimension to a second dimension during a selected time interval after implantation.

Abstract: This invention relates to a method of forming a polymer component and comprises blending polymer particles with antioxidant to form a mixture in which the antioxidant coats the polymer particles, irradiating the mixture to cross-link the polymer particles therein and forming the irradiated mixture into a consolidated component. The invention also relates to a method of forming an articular surface for a prosthesis and a prosthesis having a polymer articular bearing surface wherein at least one pre-determined portion of the bearing surface is provided with cross-linked polymer bonds.

Abstract: Knee prostheses featuring components that more faithfully replicate the structure and function of the human knee joint in order to provide, among other benefits: greater flexion of the knee in a more natural way by promoting or at least accommodating internal tibial rotation in a controlled way, replication of the natural screw home mechanism, and controlled articulation of the tibia and femur respective to each other in a more natural way. In a preferred embodiment, such prostheses include an insert component disposed between a femoral component and a tibial component, the insert component preferably featuring among other things a reversely contoured posterolateral bearing surface that helps impart internal rotation to the tibia as the knee flexes.

Abstract: Knee prostheses featuring components that more faithfully replicate the structure and function of the human knee joint in order to provide, among other benefits: greater flexion of the knee in a more natural way by promoting or at least accommodating internal tibial rotation in a controlled way, replication of the natural screw home mechanism, and controlled articulation of the tibia and femur respective to each other in a more natural way. In a preferred embodiment, such prostheses include an insert component disposed between a femoral component and a tibial component, the insert component preferably featuring among other things a reversely contoured posterolateral bearing surface that helps impart internal rotation to the tibia as the knee flexes.

Abstract: Knee prostheses featuring components that more faithfully replicate the structure and function of the human knee joint in order to provide, among other benefits: greater flexion of the knee in a more natural way by promoting or at least accommodating internal tibial rotation in a controlled way, replication of the natural screw home mechanism, and controlled articulation of the tibia and femur respective to each other in a more natural way. In a preferred embodiment, such prostheses include an insert component disposed between a femoral component and a tibial component, the insert component preferably featuring among other things a reversely contoured posterolateral bearing surface that helps impart internal rotation to the tibia as the knee flexes.

Abstract: A knee joint prosthesis includes a femoral component having a first condylar bearing surface and a second condylar bearing surface. Each of the first and second condylar bearing surfaces has a cross-section in a coronal plane that exhibits at least two different radii. The prosthesis also includes a tibial component and an insert component associated with the tibial component. The insert component has bearing surfaces that are complementary to the first and second condylar bearing surfaces, wherein a contact point is established between the bearing surfaces of the insert component and the first and second condylar bearing surface. In accordance with the present invention and as a result of the above construction, varus and valgus rotation of the femoral component relative to the insert component causes the contact point to move laterally as the knee is rotated. By shifting the contact pointy laterally/outwardly, the knee stability (i.e., stiffness) gradually increased.

Abstract: A knee joint prosthesis includes a femoral component having an anterior side, a posterior side, a pair of laterally spaced condylar portions, and an intercondylar portion joining the condylar portions and including a recess. A cam surface is located adjacent the intercondylar recess on the anterior side of the femoral component and has a saddle shape that is defined by an at least substantially concave first radius of curvature and a convex third radius of curvature that is perpendicular to the concave first radius of curvature. The prosthesis also includes a tibial component including a platform having an upper surface that includes first and second laterally spaced concavities. Each concavity is adapted for receiving one condylar portion of the femoral component. The tibial component has a tibial post for reception in the intercondylar recess of the femoral component.

Abstract: A modified joint prosthesis component is provided to reduce the backside wear of the joint implant. Whether the joint implant is for the knee joint, the hip joint or another joint, it is the modified bearing insert engaging surface of the metal base construct that provides for greater friction and therefore less micro-motion and resultant minimized backside wear.

Abstract: A joint prosthesis system is suitable for cemented fixation. The system has two metal implant components and a bearing. One of the metal implant components has an articulation surface for articulation with the bearing. The other metal implant component has a mounting surface for supporting the bearing. One of the metal implant components includes an extension, such as a stem or pegs, with an exposed outer surface. The metal implant component from which the extension extends comprises titanium and the exposed outer surface of the extension comprises a different form of titanium. A method of making the joint prosthesis is also disclosed.

Abstract: Method for performing an open wedge, high tibial osteotomy, utilizing an apparatus comprising a wedge-shaped implant for disposition in a wedge-shaped opening created in the tibia, wherein the wedge-shaped implant comprises at least one key for disposition in at least one corresponding keyhole formed in the tibia adjacent to the wedge-shaped opening created in the tibia, wherein each of the at least one keys comprises an interior bore for receiving a fixation screw, at least one fixation screw for disposition in the interior bore of the at least one key, and further wherein the apparatus is configured so that when the at least one fixation screw is received in the interior bore, the at least one fixation screw terminates within the bore.

Abstract: A cemented tibial prosthesis having a bone-contacting surface with a porous outer rim. With the bone-contacting surface seated against a resected proximal tibia, bone cement or another suitable adhesive will travel into the pores of the porous outer rim to enhance the connection between the tibial prosthesis and the tibia.

Abstract: A tibial prosthesis including an articulating component and a tray component with a rim that extends proximally to support the articulating component, the tray component enabling flexion of the rim relative to a bone-contacting surface of the tray component.

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: An orthopedic prosthesis includes a tibial implant and a tibial insert. The tibial implant includes an upper surface, a medial side, a lateral side and a first locking structure provided on the upper surface where the medial side and the lateral side of the tibial implant are defined by a medial-lateral midline. The tibial insert includes a second locking structure provided on its bottom surface. The first and second locking structures are configured for engaging each other along an engagement direction vector when the tibial insert is inserted into the tibial base towards the posterior side. The engagement direction vector is angled away from the medial-lateral midline of the tibial implant towards the medial side of the tibial implant by a predetermine angle.