Abstract
Introduction The NexGen-CR-Knee System ( Zimmer, Inc.) was developed for cruciate ligament retaining TKA, preserving as much of the function of the normal knee as possible. It was cleared by the FDA in 1995. Prerequisites are good bone quality and intact ligaments. It is part of a modular system for primary and some revision cases with a large selection of sizes, augmentation blocks and stem extensions.
Material In the Orthopedic Center in Kassel about 1500 NexGen Cr devices were implanted and documented since October 1998. The 5-in-1 milling system was used and all components were cemented. Prospective evaluation pre-, intra- and postoperatively, at 1, 2 and 5 years was performed with a low drop out rate. 232 consecutive cases will have the 5 year data. The outcome will be presented, among others the Knee Society Score (function & knee), range of motion, complications and reasons for revisions. Comparison with the worldwide register of this implant is made.
Conclusion The NexGen CR Knee Solution implants and the technique of implantation appear to be very successful in mid term results. It is a good basis for further developments such as highly crosslinked Polyethylene and the new CR Flex design.
Theses abstracts were prepared by Professor Roger Lemaire. Correspondence should be addressed to EFORT Central Office, Freihofstrasse 22, CH-8700 Küsnacht, Switzerland.
