RESULTS	The mean wound healing rate in A group was 24.5 % , 70.5 % , 95.3 % , 99.6 % respectively on 8th , 14th , 20th , 28th day after treatment , which were obviously higher than that in C group ( 15.1 % , 51.4 % , 84.6 % , 97.1 % , respectively , P < 0.01 ) .\