At the last follow-up of 6 months , the success rate in the R&R ( 87.5 % ) group was significantly higher than those in the UMR ( 13.3 % ) and BMR ( 42.9 % ) groups ( p = 0.000 and 0.008 ) ; the mean exodeviations at distance and near in the R&R group were significantly different from those in the UMR and BMR groups ( p = 0.000 and 0.001 ) ; there were no significant differences in the mean near-distance differences between the R&R group and the other two groups ( p > 0.05 ) .