Wound dehiscence (Stage 0 :No dehiscence ,Stage 1: less than 10 mm dehiscence,stage 2 : more than 10 mm dehiscence) Infection: Pus, sinus tract (Yes/NO) Pain according to visual analog scale (VAS) 0-10.In the third follow up time ( 12 months) ,the number of patients who were a time span of 3 months without clinical symptoms were documented in each group.