Devices and methods for hip replacement

摘要

Devices and methods for use in hip replacement surgery can incorporate computer models of a patient's acetabulum and surrounding bone structure, a first patient-specific jig designed from the computer model and configured to correspond to a final installation position and orientation of a prosthetic hip implant, a second patient-specific jig, also designed from the computer model, configured to refine the procedure, if necessary, following use of the first patient-specific jig, and/or a third patient specific jig, designed from the computer model, configured to refine the procedure, if necessary, following use of the first and second patient-specific jigs, allowing the surgeon to properly position and orient the hip prosthesis. Also shown and described are novel devices for implanting an acetabular cup.

主权项

1. A device for use in joint replacement surgery, the device comprising:
a patient-specific jig having a body formed using medical imaging data corresponding to an anatomic structure of a patient and a model of a reamed surface of the anatomic structure of the patient, the body having a proximal end and a distal end and being configured to be positioned against the anatomic structure of the patient at a joint location, the body comprising a first patient-specific jig component and a second patient-specific jig component, the first patient-specific jig component including an aperture for receiving the second patient-specific jig component, the first patient-specific jig component having a first alignment structure configured to align with a second alignment structure on the second patient-specific jig component when the first patient specific jig component and the second patient-specific jig component are both properly positioned with respect to the anatomic structure and each other and indicating adequate reaming of a portion of the anatomic structure of the patient, the first patient-specific jig component including a first alignment member located adjacent the proximal end of the body, the first alignment member configured to position and orient the body with respect to the anatomic structure of the patient to indicate information to a surgeon corresponding to a final installation position of a prostheses to be secured to the anatomic structure of the patient according to the medical imaging data, the second patient-specific jig component including a reference end that conforms to the depth and shape of the model of the reamed surface of the anatomic structure of the patient, the second patient-specific jig including a guide post aperture extending through the body from the reference end that matches a reamed surface of the anatomic structure of the patient to a distal end of the body, the guide post aperture aligns a guide post according to the final installation position of the prostheses.