Abstract
INTRODUCTION
The majority of implants available in the market today were designed to allow for a flexion up to 130 degree angle. The LPS Mobile Flex was designed to accommodate deep flexion, up to 160 degree angle. The purpose of this study is to evaluate the clinical result of the LPS Mobile Flex knee.
MATERIALS AND METHODS
From January 1999 to February 200, 1043 (one thousand and forty three) surgeries were performed on patients treated for advanced osteoarthritis. All the surgeries were carried out by the same surgeon. The majority of the patients had bilateral total knee replacements simultaneously. Mobile and fixed implants were used. Pre-operative ranges of motion were documented on lateral x-ray. Patients were considered to have full flexion if they were able to flex the knee to at least 140 degree and sit on the ground with calf touching thigh for at least one minute. Data were processed at University of Dundee
RESULTS
67% obtained full flexion as defined above. The majority of the cases with full flexion had full movement pre-operatively; except for 63 cases. Average range of motion was much better than University of Dundee data base. Complications included; 2 cases of peroneal nerve palsy, three of dislocation, and two of infection, a case of rupture of MCL ligament, a case of intra-operative tibial plateau fracture, 2of supracondylar femur fracture and 4 patella clunck
CONCLUSION
The LPS Flex Implant had a similar complication rate to those reported by other series. There was no complication that could be specifically attributed to deep flexion. However it should be stressed that this exceptional result has to do mainly with careful patient selection.
