Early Results of Primary High Flex Total Knee Arthroplasty

ABSTRACT

PURPOSE: We retrospectively evaluated the early results after total knee arthroplasty(TKA) using the Nexgen LPS-Flex fixed bearing knee system. MATERIALS AND METHODS: Ninety-five knees(71 patients) which used the LPS-Flex system for primary TKA and followed-up for a minimum 2 years were evaluated. Evaluation included preoperative and postoperative range of motion(ROM), factors affecting the postoperative ROM, Knee Society Score(KSS), knee function score, tibio-femoral angle and postoperative complications. RESULTS: Knee ROM was increased from preoperative 9.7 degrees - 123.6 degrees to postoperative 1.7 degrees - 130.7 degrees. The mean KSS and function score were improved from preoperative 53, 55 to postoperative 85 and 90 respectively. The tibio-femoral angle was changed from preoperative 5.5 degrees varus to a postoperative 5.3 degrees valgus. Two cases of early loosening of the femoral components occurred. One case underwent revision surgery while the other was closely followed up. There was no deep infection. CONCLUSION: Primary total knee arthroplasty with Nexgen LPS-flex system showed satisfactory early results including excellent ROM, except 2 cases of early loosening of femoral component. The etiology of this loosening requires further evaluation and study.