• Department of Orthopaedics, Peking Union Medical College Hospital, Peking Union Medical College &;
  • Chinese Academy of Medical Sciences, Beijing, 100730, P.R.China.;
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【Abstract】 Objective To investigate the surgical technique and the cl inical results of total knee arthroplasty (TKA)
in treating end-stage gonarthrosis combined with valgus knee deformity. Methods Between November 1998 and October
2010, 64 patients (72 knees) with end-stage gonarthrosis combined with valgus knee deformity underwent TKA by a medial
parapatellar approach. Of the 64 patients, 18 were male and 46 were female with an average age of 62.5 years (range, 23-82 years),
including 44 cases (49 knees) of osteoarthritis, 17 cases (20 knees) of rheumatoid arthritis, 2 cases (2 knees) of haemophilic
arthritis, and 1 case (1 knee) of post-traumatic arthritis. Bilateral knees were involved in 8 cases, and single knee in 56 cases. The
flexion and extension range of motion (ROM) of the knee joint was (82.2 ± 28.7)°; the femur-tibia angle (FTA) was (18.0 ± 5.8)°;
according to Knee Society Score (KSS) criterion, the preoperative cl inical score was 31.2 ± 10.1 and functional score was
37.3 ± 9.0. According to Krackow’s classification, there were 65 knees of type I and 7 knees of type II. By medial parapatellar
approach, conventional osteotomy and Ranawat soft tissue release were performed in all cases. Prosthesis of preserved posterior
cruciate l igament were used in 7 cases (7 knees), posterior stabil ize prosthesis in 54 cases (60 knees), constrained prosthesis
in 4 cases (5 knees). Results Incisions healed by first intention in all cases. Peroneal nerve palsy occurred in 1 patient with
haemophilic arthritis, severe valgus deformity (FTA was 41°), and flexion contracture (20°), which was cured after 1 year of
conservative treatment. Revison surgery was performed in 1 case of deep infection at 2 years after surgery. All the patients were
followed up 4.9 years on average (range, 1-13 years). At last follow-up, the FTA was (7.0 ± 2.5)°, showing significant difference
when compared with preoperative value (t=15.502, P=0.000). The KSS cl inical score was 83.0 ± 6.6 and functional score was
85.1 ± 10.5, the flexion and extension ROM of the knee joint was (106.1 ± 17.0)°, all showing significant differences when
compared with preoperative values (P  lt; 0.05). Five patients had 12-15° valgus knee deformity, but the function of the affect
knees were good. Conclusion TKA is an effective way for the patients with end-stage gonarthrosis combined with valgus
knee deformity by medial parapatellar approach combined with conventional osteotomy and Ranawat soft tissue release. The
correction of deformity and improvement of joint function can be achieved significantly. The cl inical result is satisfactory.

Citation: WANG Xingshan,WENG Xisheng,LIN Jin,JIN Jin,QIAN Wenwei.. SURGICAL TECHNIQUE AND CLINICAL RESULTS OF TOTAL KNEE ARTHROPLASTY IN TREATING ENDSTAGEGONARTHROSIS COMBINED WITH VALGUS KNEE DEFORMITY. Chinese Journal of Reparative and Reconstructive Surgery, 2012, 26(5): 513-517. doi: Copy