The KT2000 results showed that the anterior displacement of autograft groups was ( 10.7 3.5 ) mm before operation and ( 5.0 2.7 ) mm at final follow-up , the anterior displacement of allograft groups was ( 10.9 2.9 ) mm before operation and ( 6.5 2.4 ) mm at final follow-up , there was statistic difference between before and after operation in anterior displacement in two groups ( t = 16.354 and 13.296 P < 0.05 ) .
