System and method for implant surface matching for joint revision surgery
AssigneesSmith & Nephew, Inc., Smith & Nephew Orthopaedics AG, Smith & Nephew Asia Pacific Pte. Limited
InventorsDaniel Farley, Nathaniel M. Lenz
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Abstract
Disclosed herein is a system and a method for registering a surgical site to a surgical navigation system when the surgical site contains an implant for revision joint replacement surgery. The method creates a depth map of the surgical site and provides a possible identification of the existing implant using surface matching algorithms. The model of the implant is iteratively oriented with respect to the to the depth map until an optimal fit is achieved. Once the implant has been identified and localized, the registered landmarks are used in robotic-assisted surgery.
Claims20
A method for registering a surgical site containing an implant comprising:
- positioning arrays of reflective markers on the patient;
- creating a depth map of the surgical site;
- localizing surfaces of the implant;
- providing a possible identification of the implant;
- calculating an error between the depth map and the identification of the implant;
- and
- iteratively reorienting the identification of the implant with respect to the depth map to minimize the error.
A system for registering a surgical site containing an implant comprises:
- a surgical computer;
- a library of surgical implants;
- and
- software, executing on the surgical computer and causing the surgical computer to perform the functions of:
- registering arrays of reflective markers on the patient;
- creating a depth map of the surgical site;
- localizing surfaces of the implant;
- providing a possible identification of the implant;
- calculating an error between the depth map and the identification of the implant;
- and
- iteratively reorienting the identification of the implant model with respect to the depth map to minimize the error.
Dependencies are inferred from the claim text.