A system and device (110) for determining bone laxity. For example, the system includes a tracked probe (300) comprising at least one probe marker (310) and a computer assisted surgical (CAS) system (100). The CAS system includes a navigation system (130) and a processing device (110) operably connected to the navigation system and a computer readable medium configured to store one or more instructions that, when executed, cause the processing device to receive location information from the navigation system, generate (820) a surgical plan comprising a post-operative laxity assumption (720), collect (850) first motion information related to movement of the joint through a first range of motion, collect (860) second motion information related to movement of the joint through a second range of motion, determine (870) a post-operative laxity (710), and compare the post-operative laxity and the post-operative laxity assumption to determine laxity results.

A system can include a module to measure mobility, such as pre-operative pelvic mobility, for surgical planning. The module can include one or more inertial sensors that can be positioned relative to the anatomy of a patient. Hip navigation systems can guide an acetabular cup to patient-specific target angles, based in part, on the pre-operative pelvic mobility of the patient.

Disclosed herein are a surgical system for patella tracking and a method for selecting a properly-sized patellar implant utilizing the same. The surgical system may include first and second trackers and a patellar tracking system. The first tracker may be configured to contact an unresected or a resected patella, and the second tracker may be configured to contact a bone. The patellar tracking system may be configured to track the first and second trackers during patellar flexion and extension to generate patellar range of motion and patellar trial range of motion. A method for selecting a patellar implant may utilize the first and second trackers and the patellar tracking system.

This disclosure is directed to methods for reconstructing an unstable triangular fibrocartilage complex (TFCC). Exemplary methods include preparing, delivering, and fixating a graft within a distal radioulnar joint in a manner that restores the functionality to the TFCC, thereby improving the joint kinematics of the radioulnar joint.

A system of prosthetic implants for a total knee replacement procedure is provided. The system includes a tibial component of a knee joint implant, a tibial insert configured to be positioned against the superior side of the platform of the tibial component, a first femoral component of a knee joint implant, and a second femoral component of a knee joint implant.

The invention provides a femoral head centre of rotation locating device (10) comprising an adjustable frame (12) having a frame axis (X). The frame includes a central frame portion (14); a first jaw (16) that is linearly moveable relative to the central frame portion along the frame axis and having a first femoral head contacting surface (26); a second jaw (18) that is linearly moveable relative to the central frame portion along the frame axis and having a second femoral head contacting surface (28), and a gear wheel (32) mounted on the central frame portion. The gear wheel has a centric aperture (34) located substantially equidistant from the first and second femoral head contacting surfaces. The gear wheel is operably connected to each of the first and second moveable jaws by gear teeth (30) provided on a surface of each of the first and second moveable jaws. Linear movement of the first jaw in a first direction rotates the gear wheel to cause reciprocal linear movement of the second jaw to maintain the centric aperture at a position equidistant from the first and second femoral head contacting surfaces. This aligns the centric aperture with the native head centre of the femur as the first and second femoral head contacting surfaces come into contact with opposite surfaces of the femoral head.

Provided is a spacer device for assisting a surgeon during knee surgery on a patient, the spacer device having a housing and a support portion. The housing includes a lateral member having an outer surface and an inner surface and a pair of side members that comprise respective, internal, opposed side walls. The support portion includes a first end portion disposed between the side walls of the housing and including a first pair of lateral projections and a second end portion. The support portion is further adapted for axial slidable movement relative to the housing so as to define a first space and a second space between a first pair of lateral projections and respective side members for receiving one or more spacer elements therein. A surgical system including the spacer device as well as methods of using same are also provided.

A measurement system comprising a measurement device and a computer. The measurement device is configured to measure a force, pressure, or load applied by the musculoskeletal system. The measurement device comprises an enclosure and a structure configured to fit within an opening in the enclosure. The enclosure is hermetically sealed housing electronic circuitry and at least one sensor. The structure is configured to couple to the musculoskeletal system. At least three sensors underlie and couple to the structure to measure a force, pressure, or load applied to a surface of the structure. The structure includes at least three anti-cantilevering structures. At least one of the three anti-cantilevering structures is configured to couple to the enclosure to limit canting of the structure when the musculoskeletal system couples to the surface of the structure outside a predetermined area.

A bone fusion method, system and device for insertion between bones that are to be fused together and/or in place of one or more of the bones, such as, for example, the vertebrae of a spinal column. The bone fusion device comprises one or more extendable tabs having a central rib. The bone fusion device includes one or more support channels configured to receive an insertion instrument that is then secured to the bone fusion device via a coupling mechanism. As a result, the coupled device is able to be securely positioned between vertebrae using the insertion instrument with minimal risk of slippage.

A force sensor provided with a base and a table with legs mounted on the base. The table is movable with respect to the base by a force applied to the table, and the sensor is further provided with a measuring instrument or instruments for measuring a deflection of one or more of the legs, which deflection represents said force applied to the table.