A verification instrument configured to verify the location of a surgical end-effector, including: a body; a navigation element disposed and configured to represent a spatial location of the body; a first clip extending from the body configured to clip onto a tool; a length measurement portion disposed at a first angle from the body, wherein the length measurement portion is configured to contact a tool tip when the first clip is clipped onto the tool.

A method and system for guiding knee replacement procedures, the method comprising receiving first data values from one or more sensors and one or more functional measurement devices, performing a reference measurement based on the first data values from the one or more sensors and the one or more functional measurement devices prior to a femoral cut, generating joint replacement recommendations based on the reference measurement, receiving second data values from the one or more sensors and the one or more functional measurement devices, performing a control measurement based on the second data values from the one or more sensors and the one or more functional measurement devices after a femoral cut based on the joint replacement recommendations, receiving third data values from the one or more functional measurement devices, and performing a pressure test that measures loading, balance, and kinematic behavior at medial and lateral condyles based on the third data values.

An assembly for sizing a tibia includes a plurality of tibial sizing guides. Each of the tibial sizing guides includes a tibial sizing template. The tibial sizing templates are each of different dimensions to accommodate different sizes of cut tibia surfaces.

A system and method for quantitatively assessing a press fit value (and provide a mechanism to evaluate optimal quantitative values) of any implant/bone interface regardless the variables involved including bone site preparation, material properties of bone and implant, implant geometry and coefficient of friction of the implant-bone interface without requiring a visual positional assessment of a depth of insertion. The following description is presented to enable one of ordinary skill in the art to make and use the invention and is provided in the context of a patent application and its requirements.

Systems and methods for joint replacement are provided. The systems and methods include a surgical orientation device, a reference sensor device, and at least one orthopedic fixture. The surgical orientation device, reference sensor device, and orthopedic fixtures can be used to locate the orientation of an axis in the body, to adjust an orientation of a cutting plane or planes along a bony surface, or otherwise to assist in an orthopedic procedure(s).

A surgical planning method carried out by a data processing apparatus that comprises determining a lateral force-distance characteristic for each of a plurality of knee flexion angles, determining a medial force-distance characteristic for each of the plurality of knee flexion angles, using a lateral force-distance characteristic to determine a lateral knee gap distance corresponding to a target force for at least one of the plurality of knee flexion angles, and using a medial force-displacement characteristic to determine a medial knee gap distance corresponding to a target force for at least one of the plurality of knee flexion angles. The method also comprises outputting the lateral knee gap distance corresponding to the target force and the medial knee gap distance corresponding to the target force as a function of knee flexion angle.

The present disclosure describes one or more embodiment of devices for assisting femoral component placement in total knee arthroplasty. The device may include a distractor configured to provide a constant distracting force. The distractor may include a main body of the distractor, a tibial paddle fixedly connected to the main body, the tibial paddle configured to engage a top of a tibia, at least one femoral paddle configured to push against a bottom of a femur, a spring housing fixed on the main body of the distractor, and a coiled constant force spring disposed in the spring housing. The spring housing is attached to an outer end of the coiled constant force spring, and the coiled constant force spring is configured to apply the constant distracting force on the at least one femoral paddle. The device further includes a mechanical apparatus for locating an isometric point of the femur.

A method of measuring a specific absorption rate (SAR) of a hip joint implant using magnetic resonance imaging (MRI), includes: arranging the hip joint implant in a human lower body-shaped phantom; arranging an electric field sensor around the hip joint implant; providing radio frequency (RF) energy according to an MRI sequence to the human phantom; and calculating the SAR of the hip joint implant from strength of an electric field measured by the electric field sensor.

A system and method provide for image-guided implant placement as a function of at least one intraoperative image during a surgical procedure. At least one computing device is configured by executing code stored in non-transitory processor readable media to process at least one preoperative image to assess axial rotation and/or sagittal pelvic inclination. Further, as a function of a plurality of identified anatomical landmarks in the at least one preoperative image, at least one of distances, angles, and areas is measured. Thereafter, as a function of calculations associated with the at least one of distances, angles, and areas, axial rotation associated with at least one image is measured. Thereafter, at least one value associated with placement of an implant during the surgical procedure is adjusted and information associated therewith is provided via a graphical user interface.

Technologies for aligning an acetabular prosthetic component in a patient's surgically prepared acetabulum include a reference sensor module securable to the patient's bony anatomy, an inserter sensor module securable to an acetabular prosthetic component inserter, and a display module. Each sensor module generates sensor data indicative of the orientation of the sensor module and/or structures to which the sensor module is coupled. The display module receives the sensor data from the sensor modules, determines the orientation of the acetabular prosthetic component relative to the patient's bony anatomy, and displays indicia of the determined orientation on a display.