Knee Surgery, Sports Traumatology, Arthroscopy

, Volume 15, Issue 4, pp 350–355

Early results of high-flex total knee arthroplasty: comparison study at 1 year after surgery



We compared clinical [including maximal flexion and range of motion (ROM)] and radiographical outcomes of high-flex versus conventional implants for total knee arthroplasty (TKA) after 1 year. We also analyzed the factors affecting postoperative ROM in high-flex implants. The high-flex group (n = 90) had an average maximal flexion of 129.8° (standard deviation (SD), 5.2°) significantly higher than the 124.3° (SD, 9.2°) of the conventional group (n = 90), especially for patients with less than 90° of knee flexion (< 0.05). There was no significant difference in hospital for special surgery (HSS) score between the two groups. No knee developed osteolysis, aseptic loosening, or other complications. We found that, for high-flex implants, preoperative ROM had a significant effect on postoperative ROM.


Total knee arthroplasty High-flex implants Maximal flexion Range of motion 


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Copyright information

© Springer-Verlag 2006

Authors and Affiliations

  1. 1.Department of Orthopedic SurgeryUniversity of Ulsan, College of Medicine, Asan Medical CenterSeoulSouth Korea

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