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Purpose: To evaluate the Three years clinical results of a total knee arthroplasty using the NexGen LPS-Flex fixed bearing system. Materials and Methods: One hundred knees (65 patients) which used the LPS-Flex system for primary TKA and were followed up for a minimum Three years were evaluated. Eval...

Purpose: To evaluate the Three years clinical results of a total knee arthroplasty using the NexGen LPS-Flex fixed bearing system. Materials and Methods: One hundred knees (65 patients) which used the LPS-Flex system for primary TKA and were followed up for a minimum Three years were evaluated. Evaluations included preoperative and postoperative range of motion (ROM), factors affecting the postoperative ROM that included age of the patient, the body mass index, the flexion contracture, degree of varus deformity, and Hospital for Special Surgery score. Results: Knee ROM increased from preoperative 122.8° to postoperative 130.5°. The mean HSS score improved from preoperative 58.4 to postoperative 91.3. The femoral-tibial angle was changed from preoperative 6.4° varus to a postoperative 5.5° valgus. The most important factor that influenced the range of motion after an arthroplasty was the preoperative range of motion. One deep infection developed, but was cured with synovectomy and administration of antibiotics. Conclusion: Primary TKR with NexGen LPS-Flex system showed satisfactory early results including excellent ROM. We found that preoperative ROM had a significant effect on postoperative ROM.

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