Computer-Assisted Hip Osteotomy Surgery with Real-Time Biomechanical Feedback

Periacetabular osteotomy (PAO) is a corrective surgery for patients exhibiting developmental dysplasia of the hip (DDH). We are interested in developing a computer-assisted surgical system with modules for preoperative planning and intraoperative guidance. To this end, we employ preoperative image processing to segment bony anatomy and discrete element analysis (DEA) to analyze the contact pressure distribution on the hip. Intraoperatively, we navigate using an infrared tracking system and provide real-time updates (both visual and quantitative) to the surgeon regarding the acetabular alignment.

ExampleOsteotomyCuts

Image-Guided Surgical Workstation for Osteoporotic Bone Augmentation

Our goal is to develop a software workstation to assist in performing femoral augmentation for osteoporotic patients. The surgical procedure consists of a series of bone cement injections into the femur. The bone augmentation system features preoperative biomechanical planning to determine the most advantageous cement injection site(s) and injection protocol to increase the strength of the femur. During the surgery, we will navigate the injection device and inraoperatively reconstruct virtual models of the injected cement. The injected cement models can be used to update the injection protocol intraoperatively.

Bone Augmentation

Robotically-Assisted Treatment of Pelvic Osteolysis

Osteolysis is a condition wherein bone breaks down, undergoes resorption, and dissolves into a viscous solution. Our research focuses on developing a minimally-invasive surgical workstation to clean the osteolytic lesions in the hip due to wear particles from the polyethylene lines of total hip arthroplasties. We are developing a robotically-controlled dextrous manipulator (snake-like robot) and the appropriate tools and active cannulae to clean the cavity behind the acetabular cup. The dextrous manipulator will be one tool in a surgical workstation for the diagnosis, planning and real-time intraoperative treatment of the lesions. The intraoperative protocol includes real-time monitoring and navigation to provide feedback and update the preoperative plan.

Osteolysis

Computer-Assisted Diagnosis and Treatment for Femoroacetabular Impingement

Femoroacetabular impingement (FAI) is a condition in which there is abnormal contact between the proximal femur and acetabular rim leading to impingement. Two specific types of impingement have been identified: cam (related to the femoral neck) and pincer (related to the acetabulum). This condition can cause pain, limit range of motion, and lead to labral tears and/or hip arthritis. We are interested in developing computer-assisted diagnostic and treatment options for FAI, with the current focus being pincer impingement.

FAI Overview

Computer-assisted Total Face Transplantation

Craniomaxillofacial transplantation (CMF) is a technique for reconstructing facial skeletal defects using hard (and soft) tissue from a cadaveric donor.