Abstract: The present disclosure pertains to apparatus and methods for positioning the angular orientation and depth positioning of an acetabular component during hip arthroplasty procedures. The apparatus comprises a positioning member and guiding member set according to a preoperatively determined angular orientation derived from a pelvic radiograph or radiographs in accordance with the methods provided.

Abstract: A device for marking bone such as a patella is anchored to one surface of the bone, whereby the contact with the surface defines the desired resection plane, and then a cautery or other marking device is used to mark the bone relative to this plane. The marking device is removed and then the bone may be resected using techniques known in the art. A device for measuring the remaining bone allows a user to measure bone thickness and visually estimate superoinferior angle or mediolateral angle of the resected surface relative to the desired resection plane. The measuring device may optionally be used with a computer-assisted surgical system for numerical measurements.

Abstract: A charging unit including a charge contact and a spring in contact with the charge contact for charging a rechargeable device. The charge contact slidably engages with a charging surface of the rechargeable device and a spring connected to the charge contact applies a force to the charging surface as the charging unit receives the rechargeable device.