According to one aspect of the invention, a system for medical object tracking is provided. The system includes a plurality of radio frequency transceivers where each of the plurality of radio frequency transceivers are configured to emit a radio frequency signal at a respective frequency. The system includes a radio frequency beacon removably attachable to a medical object where the radio frequency beacon configured to: reflect the radio frequency signals from the plurality of radio frequency transceivers, and emit vibration-based signals. The system includes a control device in communication with the plurality of radio frequency transceivers where the control device includes processing circuitry configured to determine a location of the medical object in three-dimensional space based at least in part on the reflected radio frequency signals and vibration-based signals.

A method for removing an implant attached to a bone during revision joint replacement surgery includes a library of implant models. A series of surface points are collected on the implant with a digitizer. A best match is computed between the collected surface points and an implant model in the library of implant models to register the position of the implant model to the implant. A location is computed of a material-implant interface based on the geometry of the implant model and the registered position of the implant model. Material is removed at the material-implant interface to separate the implant from the bone. A computer-assisted surgical system is provided for performing the method.

A method for removing an implant attached to a bone during revision joint replacement surgery includes a library of implant models. A series of surface points are collected on the implant with a digitizer. A best match is computed between the collected surface points and an implant model in the library of implant models to register the position of the implant model to the implant. A location is computed of a material-implant interface based on the geometry of the implant model and the registered position of the implant model. Material is removed at the material-implant interface to separate the implant from the bone. A computer-assisted surgical system is provided for performing the method.

Systems and methods may be used for performing a robotic revision knee arthroplasty. For example, a robotic surgical device may be used to perform a cut. The cut may be planned to remove an existing implant based on information about the existing implant (e.g., reference points on the existing implant, an implant type, a maker of the implant, degradation information about the implant, a failure reason for the implant, or the like). In an example, a new plan may be developed for a new implant to replace the existing implant.

Patient-specific instrumentation for use when performing articular joint repair is provided. A patient-specific jig is adapted to be positioned over a bone at an articular surface thereof for assisting in preparing the bone surface for reception of a prosthesis. The jig comprises a bone contacting portion adapted to matingly contact a portion of the articular surface of the bone and a cutting slot adapted to receive therein a saw blade for resecting the articular surface of the bone. The cutting slot may be press-fitted into the opening of a cut guide. A patient-specific plate and a patient-specific rotational guide are also provided for guiding a positioning of the prosthesis over the resected surface of the bone. A method for manufacturing the patient-specific jig is further provided.

An assembly for guiding resection of a femur and tibia of a knee joint in preparation for installing a femoral and tibial knee components. For example, the assembly can include tibial and femoral IM rods to which are connected through a tensioning bolt that allows controlled adjustment of the distraction of the tibia and femur during cut positioning in a range of flexion angles. Also, the assembly is usable with relatively small, noninvasive approaches to the knee joint by way of relatively narrow, low profile components that attach to tibial and femoral IM rods. Further, the assembly includes several quick-release components to allow fast assembly and disassembly in a surgical setting. Each of these aspects, along with the ability of the assembly to accurately guide initial reference cuts to the tibia and femur, promotes an improved outcome for the patient.

A knee arthroplasty system may have a femoral joint prosthesis with a femoral bone engagement surface with an anterior portion, a posterior portion, and a distal portion that connects the anterior portion to the posterior portion. A first femoral anchoring member may protrude from the distal portion, and may be connected to the anterior portion with a primary femoral web. A tibial resection guide may have a base member and a guide member with a slot that guides a cutting blade to resect the tibial plateau. The guide member may slide along an arcuate path relative to the base member.

Embodiments of the present application provide technologies related to adaptive surgeon-specific instrumentation, unique preparatory tools and procedures for bone resection and implant devices, and systems for selection of implantation preparatory tools for implantation procedures. The embodiments described herein may, for example, be utilized in connection with knee arthroplasty procedures.

An orthopaedic surgical instrument includes a customized patient-specific surgical instrument having a body. A cutting guide slot extends through the body. A pair of first arms extends posteriorly from the body. Each arm includes a first customized patient-specific negative contour configured to receive a portion of a first corresponding positive contour of one of a patient's femoral condyles. A second arm extends proximally from the body. The second arm has a second customized patient-specific negative contour configured to receive a portion of a second corresponding positive contour of an anterior surface of the patient's femur. A method of performing a surgical procedure is also disclosed.

A number of improvements are provided relating to computer aided surgery. The improvement relates to both the methods used during computer aided surgery and the devices used during such procedures. Some of the improvement relate to controlling the selection of which data to display during a procedure and/or how the data is displayed to aid the surgeon. Other improvements relate to the structure of the tools used during a procedure and how the tools can be controlled automatically to improve the efficiency of the procedure. Still other improvements relate to methods of providing feedback during a procedure to improve either the efficiency or quality, or both, for a procedure.