[Comparison of efficacies for two surgical methods in the treatment of medial tibial-femoral osteoarthritis].

Objective: To compare the clinical efficacies of two surgical methods in the treatment of medial tibial-femoral osteoarthritis.

Methods: Between October 2007 and June 2010, a total of 22 cases (25 knees) with severe osteoarthritis in medial tibial-femoral compartment underwent minimally invasive unicompartmental knee arthroplasty (UKA) with Sled prosthesis after arthroscopic procedure. And its clinical efficacy was compared with that of 22 cases (25 knees) undergoing total knee arthroplasty (TKA) with Gemini MKII prosthesis almost simultaneously.

Results: There were no significant difference in general data between 2 groups (P > 0.05). Compared with the TKA group, the UKA group had a smaller blood loss ((148 ± 26) vs (278 ± 36) ml), a shorter operative duration ((68 ± 12) vs (86 ± 12) min), a faster progress of resuming 90° flexion ((3.18 ± 1.8) vs (9.1 ± 2.2) d) and an earlier off-bed time (P < 0.05). All patients were followed up for 6 - 34 months. There was no significant difference in KSS (Knee Society Score), function score or WOMAC (Western Ontario and McMaster Universities) score between 2 groups at the last follow-up (P > 0.05).

Conclusion: The treatment of medial tibial-femoral osteoarthritis with minimally invasive UKA is superior to that with TKA in that it is less invasive, there is a faster recovery of joint functions and no significant difference exists in the mid-term clinical efficacies between them.