Keith R. Berend, MD
The Vanguard™ M Partial Knee System utilizes a minimally invasive technique, pioneered by John Repicci, MD, and was designed for use in the medial and lateral compartments. The femoral component, made of cast cobalt chromium molybdenum alloy, has the unique spherical form of the Oxford Unicompartmental knee. This shape has several advantages over a polyradial component: -A rotary mill prepares the femoral bone surface for its accurate implantation. When employed with the Oxford instruments, its spherical shape facilitates intraoperative balancing of the ligaments. -Its anterior lip is sunk below the level of the retained articular cartilage of the patellar groove and cannot impinge on the patella. -It is more forgiving in avoiding wear from edge loading. The metal tray of the tibial component is based on the shape of the Oxford Unicompartmental knee to provide good plateau coverage with minimal overhang. The fixed polyethylene bearing surface is direct compression molded to the tray. The articular surface is relatively flat, to permit rolling and sliding of the femoral implant, but has a slight concavity to increase the contact area. State-of-the-art instrumentation correctly balances flexion and extension gaps. In this VJO New Development video, Keith R. Berend of Columbus, Ohio demonstrates his surgical technique.
- Criteria for Success
- Preoperative Planning
- Open vs. Minimally Invasive Surgical Technique
- Total Run Time: 36:24 minutes
- Catalog Number: 5102
- VJO Publication Date: September, 2008