摘要
Objective; TO observe the clinical outcome of total knee arthroplasty (TKA ) with posterior cruciate ligament (PCL ) retention in patients with severe varus deformity. Methods We reviewed the clinical treatment results of primary TKA in patients with severe varus deformity (≥20°) between January 1990 and July 1995. All patients, suffered from ostecoarthritis, were performed on a single surgeon using a minimally constrained "Hybrid" Miller-Galante knees (MG-I). Cliniccal evaluation were assessed by using the Knee Society clinical rating system. The Student’s t test was used to analyse the data. Results At a mean follow-up of 6 years (4-9years), 56 knees in 38 patients were available for review. 5 patients (7 knees) lost follow-up and 3 patients (4 knees) died. The average knee score improved from 33 points before operation to 91 points in the latest follow-up with excellent results in 84% of all patients. The Knee Society functional score improved from 39 to 76 points. The improvements were statistically significant (P < 0. 01 ). A functionally acceptable range of motion (ROM) of more than 90° were achieved in 86% of all patients. Most of cases (50/56 ) had postoperative alignment inside the normal range of 5° to 7° valgus. The other 6 cases had postoperative residual deformity of 5°-10°varus. Total revision rate was 21 % (12 /56 ), the average revision time was 5. 5 years after surgery. Other complications included patellar subluxation in 1 case, anterior pain of knee in 4 cases, and superficial cellulitis in 1 case. No early or late infection, aseptic loosening or anterioposterior instability occurred in this series. Conclusion Severs varus deformity can he successfully corrected at the time of primary TKA by using PCL-retention prosthesis. There were more problems from postoperative medial-lateral instability of knee which contributed significantly to early failure after an average of 6. 0 years.
Objective; TO observe the clinical outcome of total knee arthroplasty (TKA ) with posterior cruciate ligament (PCL ) retention in patients with severe varus deformity. Methods We reviewed the clinical treatment results of primary TKA in patients with severe varus deformity (≥20°) between January 1990 and July 1995. All patients, suffered from ostecoarthritis, were performed on a single surgeon using a minimally constrained 'Hybrid' Miller-Galante knees (MG-I). Cliniccal evaluation were assessed by using the Knee Society clinical rating system. The Student's t test was used to analyse the data. Results At a mean follow-up of 6 years (4-9years), 56 knees in 38 patients were available for review. 5 patients (7 knees) lost follow-up and 3 patients (4 knees) died. The average knee score improved from 33 points before operation to 91 points in the latest follow-up with excellent results in 84% of all patients. The Knee Society functional score improved from 39 to 76 points. The improvements were statistically significant (P < 0. 01 ). A functionally acceptable range of motion (ROM) of more than 90° were achieved in 86% of all patients. Most of cases (50/56 ) had postoperative alignment inside the normal range of 5° to 7° valgus. The other 6 cases had postoperative residual deformity of 5°-10°varus. Total revision rate was 21 % (12 /56 ), the average revision time was 5. 5 years after surgery. Other complications included patellar subluxation in 1 case, anterior pain of knee in 4 cases, and superficial cellulitis in 1 case. No early or late infection, aseptic loosening or anterioposterior instability occurred in this series. Conclusion Severs varus deformity can he successfully corrected at the time of primary TKA by using PCL-retention prosthesis. There were more problems from postoperative medial-lateral instability of knee which contributed significantly to early failure after an average of 6. 0 years.
