According to AO/ASIF classification system, there were 11 cases of type A1, 7 A2, 3 A3, 5 C1, 3 C2 ,and 1 C3 .The follow up period ranged from 6 to 54 months.

• 按AO/ASIF分类法,A1型11例,A2型7例,A3型3例,C1型5例,新鲜C2型2例,陈旧C2型1例,C3型1例。