According to the Constant-Murley score system , that the scores of group A were 90.66.2 , 91.84.8 , 94.73.6 and 97.81.2 at 1st , 3rd , 6 month and last follow-up after operation were higher than those of group B 74.83.4 , 78.44.4 , 82.22.8 and 94.63.6 ( P 0.05 ) .