Abstract: A controlled force surgical implant impaction instrument is provided which includes a striking assembly, a retaining pin, and an actuator component. The striking assembly is configured to impact a surgical implant. The retaining pin is moveable between a first position and a second position. In the first position, the retaining pin inhibits distal movement of the striking assembly. In the second position, the retaining pin does not inhibit distal movement of the striking assembly. The actuator component includes a reloading channel. The actuator component is movable between a third position and a fourth position. In the third position, the retaining pin is in the first position and the retaining pin cannot be forced along the reloading channel. In the fourth position, the striking assembly can be used to move the retaining pin along the reloading channel.

Abstract: A femoral prosthesis system is provided which includes femoral prosthesis and an instrument for inserting/extracting the femoral prosthesis. The femoral prosthesis includes a stem and a neck portion. The stem includes a proximal end portion which defines a proximal stem axis. The neck portion is located proximally of the proximal end portion. The neck portion includes a proximal surface and an insertion/extraction cavity which extends distally from the proximal surface. The insertion/extraction cavity is configured to couple with the insertion/extraction instrument. The insertion/extraction cavity defines an insertion/extraction cavity axis which, when projected onto a coronal plane including the proximal stem axis, is not parallel with the proximal stem axis. The insertion/extraction instrument includes a distal end portion configured to couple with the insertion/extraction cavity.

Abstract: An impactor for use in securing an orthopaedic implant within a bone surface includes a shaft having a first end adapted to be impacted by a tool. The impactor further includes a head having a first end and a second end, wherein the first end of the head is connected to the second end of the shaft and a second end of the head includes an impaction surface. The head further includes an anti-rotation projection extending from the impaction surface and adapted for insertion within a groove formed by the implant to prevent rotation of the head and shaft when the head is in contact with the implant.

Abstract: A surgical instrument for use in an orthopaedic arthroplasty procedure includes a shaft having a first end, a second end, and a longitudinal axis extending through a center of the shaft between the first and second ends. The surgical instrument further includes a spine extending outwardly from the first end of the shaft in a direction perpendicular to the longitudinal axis, wherein the spine has a longitudinal extent that is parallel to the longitudinal axis. When the surgical instrument is in contact with a tibial implant component, the spine is adapted to be positioned within an intercondylar notch of a femoral component.

Abstract: An instrument for use in preparing a graft. The instrument includes at least one cutting portion configured to resect a graft section from the graft. The instrument also includes a drive portion operably coupled to the cutting portion and configured to receive a rotational force. At least one reaming portion is positioned proximally to the cutting portion, the reaming portion is configured to ream a surface of the graft. The reaming portion and the cutting portion are positioned with respect to each other such that when the instrument is positioned against the graft and the rotational force is applied to the drive portion, the cutting section rotationally forms the graft section from the graft and the reaming portion rotationally reams a proximal section of the graft.

Abstract: A glenoid component for securement to a glenoid surface of a scapula comprises a body portion having a first surface adapted to contact the glenoid surface of a scapula and a second surface configured to receive the head portion of a humerus. The glenoid component further includes an anchor peg for penetrating the glenoid surface of the scapula so as to secure the body portion to the glenoid surface of the scapula. The anchor peg includes a cylindrical shaft extending from the first surface of the body portion and a fin secured to and extending outwardly from the cylindrical shaft. The glenoid component further includes a feature that prevents rotation of the glenoid component.

Abstract: A modular knee prosthesis system comprises a distal femoral articulation component, a distal augment, a posterior augment and a first connector for securing at least one of the augments to the distal femoral articulation component through a bore in the augment and an opening in the distal femoral articulation component. The distal femoral articulation component has a distal bone-facing surface, a posterior bone-facing surface and an opening. The openings into the bores of the augments are in the medial or lateral side surface of the augment. Both augments can be mounted and removed from the distal femoral articulation component from either the medial or lateral side.

Abstract: A modular prosthesis kit includes a sleeve. The sleeve has a central portion and a fin. At least part of the central portion includes a plurality of adjacent terraces. The fin includes a pair of tapered outer surfaces that are continuous, non-terraced and define a wedge-shape to stabilize the position of the sleeve when implanted. The sleeve may include a single terraced spout or wing with such a fin or may not have any spouts or wings extending out from the central portion. The kit may also include sleeves with two spouts or wings extending out from the central portion.

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: A method for providing joint arthroplasty includes resecting an end portion of a long bone, preparing a central longitudinal opening in a medullary canal of the long bone, providing a prosthetic stem component, installing the prosthetic stem component into the opening in a medullary canal, providing a reamer including an opening for receiving the prosthetic stem component, positioning the reamer onto the prosthetic stem component with the opening of the reamer positioned at least partially over the prosthetic stem component, reaming a portion of the long bone with the reamer, removing the reamer, and installing a prosthetic body component onto the prosthetic stem component.

Abstract: The invention provides a hydrogel composition comprising water and a hydrophilic polymer, wherein the hydrogel composition has (a) an ultimate tensile strength of about 10 kPa or more, (b) a compressive strength of about 70 kPa or more, or (c) an ultimate tensile strength of about 10 kPa or more and a compressive strength of about 70 kPa or more. The invention further provides methods for producing a hydrogel composition.

Abstract: A kit (10) for preparation of a bone cavity (12) in a bone (14) for implantation of a joint prosthesis (16) is provided. The kit (10) includes a guide (20) defining an opening (22) therethrough. The guide (20) is in cooperation with the prosthesis. The kit (10) also includes a rotatable tool (24) constrainable within the opening (22) of said guide (20). The tool (24) is adapted for removal of bone (14) to form the bone cavity (12).

Abstract: A surgical scalpel, scalpel instrument and/or scalpel system (collectively, scalpel), is configured for use in a transverse carpal ligament surgical procedure. The scalpel evaluates an incision path with respect to a nerve in the incision path, and performs the incision if appropriate. The scalpel emits a signal through a potential incision path through tissue captured by the scalpel. The scalpel utilizes the emitted signal to determine whether a nerve is in the incision path. The surgical instrument includes a retractable blade. Evaluation includes determining whether a nerve is present before incision and/or evaluating whether the target tissue has been appropriately captured. A warning is provided when a nerve is in the incision path and/or the captured target tissue is inappropriate. The surgical instrument disables extension of the blade when a nerve is in the dissection path and/or the captured target tissue is inappropriate.

Abstract: A knee prosthesis in one embodiment includes a femoral component having a notch defined between spaced apart medial and a lateral condyle surfaces, the notch defining an elongated cam housing having a posterior cam at one end of the cam housing, and a tibial component including (i) a platform, (ii) a bearing supported on and rotatable in relation to the platform, the bearing defining medial and lateral bearing surfaces, and (iii) a spine projecting superiorly from the bearing within the cam housing, wherein the spine includes an anterior face and an opposite posterior face facing the posterior cam when the medial and lateral condyle surfaces are in articulating contact with the medial and lateral bearing surfaces, wherein the posterior face of the spine is concave along substantially the entire height of the spine, and wherein the spine terminates in a convex rounded posterior peak.

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: A number of orthopaedic surgical instruments are disclosed. A method, apparatus, and system for fabricating such instruments are also disclosed.

Abstract: A reamer for use in performing arthroplasty includes a first cutting structure having an inner concave surface that defines a first cavity and terminates in a generally circular leading edge. The inner concave surface includes a first cutting feature that is spaced apart from the leading edge. An elongate member extends from the first cutting structure into the first cavity toward the leading edge that includes a second cutting feature. A second cutting structure is secured to the elongate member and positioned within the first cavity. The second cutting structure extends outwardly from the elongate member toward the inner concave surface and includes a third cutting feature.

Abstract: A system for use in preparing an articulating surface of a component of an orthopaedic implant is provided. The system includes a magnetorheological polishing fluid including a carrier fluid and a plurality of particles suspendable in said carrier fluid. The system also includes a vessel for containing the Magnetorheological polishing fluid. The system also includes a mechanism for delivering the fluid to form a polishing zone and a holder for securing the component and for moveably positioning the articulating surface of the component relative to the polishing zone. The system further includes a controller for determining the rate of material removal from the object, for determining the direction and velocity of movement of the polishing zone relative to the object and for determining the number of cycles of polishing required.

Abstract: A prosthesis (20) for use in performing joint arthroplasty is provided. The prosthesis (20) is to be fitted to a long bone (3). The prosthesis includes a first body (22) having a first body articulating surface (24) defining a generally circular outer periphery (26) of the first body articulating surface (24). The first body (22) has a support surface (28) opposed to the articulating surface (24). The support surface (28) is adapted to receive the head of the long bone (3). The prosthesis (20) also includes a second body (30) operably associated with the first body (22). The second body (30) has a second body articulating surface (32) extending from a portion of the circular outer periphery (26) of the first body articulating surface (24). A tool kit for preparing a humerus to receive a prosthesis is also disclosed.

Abstract: A joint prosthesis includes a bone engaging portion, such as a stem, and articulating component, such as a humeral head, and an insert component that supports the articulating component and is removable from the stem. A mating component mates with the humeral head and is configured to engage the insert component at adjustable angles according to the anatomy of the patient's joint. In a revision surgery, the stem remains within the patient's bone while the insert component is removed with the mating component and humeral head fixed to the insert component. A new insert component may be prepared with the mating component and humeral head oriented to replicate the angular orientation of the previous prosthesis. The new insert component is then mounted within an insert cavity in the implanted stem and rigidly fastened to complete the revision.