Disclosed herein are systems and methods of patella arthroplasty. A navigated patella clamp used in an arthroplasty procedure includes first and second movable jaw members and an actuation member coupled to the first and second jaw members for moving the first and second jaw members along a plane toward and away from one another. The patella clamp further includes a tracker and adjustable stylus for positioning the clamp on a patient's patella below a desired resection plane. The adjustable stylus coupled to the clamp is used to check the position and orientation of the clamp with respect to the patella to ensure the correct amount of bone will be resected from the patella corresponding to the thickness of a patella component that will be implanted on the resected patella.

Disclosed herein are tools for repairing articular surfaces repair materials and for repairing an articular surface. The surgical tools are designed to be customizable or highly selectable by patient to increase the speed, accuracy and simplicity of performing total or partial arthroplasty.

Disclosed herein are methods, compositions and tools for repairing articular surfaces repair materials and for repairing an articular surface. The articular surface repairs are customizable or highly selectable by patient and geared toward providing optimal fit and function. The surgical tools are designed to be customizable or highly selectable by patient to increase the speed, accuracy and simplicity of performing total or partial arthroplasty.

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.

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.

An assembly for use in knee surgery includes a patella sensor component having a backing plate which can be fitted to the patella and which has at least one sensor which can generate a signal corresponding to the compressive load applied to the backing plate, and at least first and second shims which provide a patella bearing surface for articulation against a surface on the patient's femur, and which can be positioned individually or in one or more combinations between the backing plate and the patient's patella to define first and second positions of the bearing surface relative to the patella. The assembly includes a clamp for a patella having opposing jaws which can be moved towards one another to clamp the patella between them, the clamp providing a reference surface for engaging the posterior surface of the patella and a support surface for supporting the cutting head of a cutting instrument, thereby locating the cutting instrument relative to the clamp. First and second locator inserts can be mounted individually or in one or more combinations on or relative to the clamp, providing a physical connection between the reference and support surfaces which define first and second positions of the support surface relative to the reference surface, and thereby define first and second positions for the resection plane relative to posterior surface of the patella. The increment between the first and second positions of the bearing surface on the bearing plate relative to the patella matches the increment between the first and second positions of the support surface relative to the reference surface.

A cutting assembly for resecting a patient's patella during knee surgery comprises a cutting instrument having a cutting head for cutting the patella on a selected resection plane, and a patella clamp having opposing jaws which can be moved towards one another to clamp the patella between them. The clamp provides a reference surface for engaging the posterior surface of the patella, and a support surface for supporting the cutting head of the cutting instrument, thereby locating the cutting instrument relative to the clamp. The assembly includes a plurality of connector inserts which can be mounted individually or in one or more combinations on or relative to the clamp, providing a physical connection between the reference and support surfaces which defines the inclination of the support surface relative to the reference surface so that the inclination of the support surface relative to the reference surface can be varied by changing one or more of the connector inserts.

A positioning guide system for guiding a surgical tool comprising a positioning guide and a user interface. The positioning guide comprising: an interface to correspond to a plurality of anatomic landmarks of a patient; a plurality of sensors to provide an output indicative of the proximity of the interface and one or more of the plurality of anatomic landmarks; and a tool guide, for a surgical tool, positioned relative to the interface. The user interface provides a user output indicative of correct positioning of the positioning guide and the anatomic landmarks of the patient based on the output of the plurality of sensors.

Apparatus for use in debriding a bone, said apparatus comprising:

an arthroscopic debridement template comprising a body reconfigurable between (i) a first configuration having a first profile and comprising an arc matching the desired curvature of the bone after debridement, and (ii) a second configuration having a second profile, wherein said second profile is smaller than said first profile.

Systems and methods for ligament balancing during robotic surgery. One or more transducers are positioned within a knee joint to detect forces indicative of tension in ligaments and to provide output based on the detected forces. A distraction device is used to provide a distraction force to cause movement of a distal end portion of a femur relative to a proximal end portion of a tibia to increase tension in the ligaments. Information associated with output from the transducers is displayed for viewing.