Clinical effects of posterior-stabilizing prosthesis in total knee arthroplasty for type Ⅱ valgus deformity: a report of 43 cases
GUO Yang
CHEN Wei-min
QIAN Zhong-sheng
WANG Wei-jun
ZHANG Zhi-xin
QIAN Jin-rong
GAO Bo
Abstract：Objective To investigate the clinical effects of posterior-stabilizing prosthesis in total knee arthroplasty (TKA) for type Ⅱ knee valgus deformity. Methods A total of 43 patients (49 knees) with type Ⅱ valgus deformity were performed TKA (medial patellar approach, routine osteotomy, lateral soft tissue release) by using posterior-stabilizing prosthesis from March 2011 to March 2013. Radiography images, FTA angles, ROM and HSS were recorded preoperatively, 1, 3, 6, 12, 24 months postoperatively to evaluate the effects of surgery and prosthesis. Results All 43 patients (49 knees) were followed up with a mean period of 28.4 months (range: 14 - 46 months). The radiography evaluation indicated that there was no prosthesis loosening or sinking. FTA angles reduced from 16.9° (range: 14° - 20°) preoperatively to 5.4° (range: 3° - 8°) postoperatively. The range of motion was corrected from the mean 90.3° (range: 80° - 95°) preoperatively to the mean 115.5° (range: 105° - 125°) at the latest follow-up. The HSS knee score improved from 41.2 (range: 36 - 43) preoperatively to 88.6 (range: 84 - 95) at the latest followup. No severe complications occurred. Differences were all statistically significant (P ＜ 0.05). Conclusions For type Ⅱ knee valgus deformity, TKA by medial patellar approach, routine osteotomy, lateral soft tissue release, posteriorstabilizing prosthesis can get satisfactory clinical effects, correct FTA angles, and significantly improve knee functions and the quality of life.
Keywords：Genu valgumKnee jointArthroplastyreplacementknee
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 256-260 )