Abstract : The objective of the study was to evaluate the effect of two commonly used flap techniques (envelop flap and triangular flap) for the removal of impacted mandibular third molars on the postoperative wound dehiscence. The effect of the number of sutures placed distal to the second molar on the wound dehiscence was also assessed in the study. Fifty patients requiring surgical removal of partially-erupted mesioangular impacted mandibular third molars were randomly assigned to either envelop flap group or triangular flap group with twenty-five patients in each group. Surgical removal of impacted mandibular third molars was performed in both the groups. Wound dehiscence was evaluated on the seventh postoperative day. There was a strong negative correlation (rs = -0.404) existed between the number of sutures placed and the incidence and severity of wound dehiscence which was statistically significant (p = 0.004) at the 0.01 significance level. Though the severity of wound dehiscence was slightly higher in triangular flap group (Mean rank = 28.12) than envelop flap group (Mean rank = 22.88), the difference was not statistically significant (p= 0.183) at the 0.05 significance level. The results of our study reveal that though, the incidence and severity of wound dehiscence was slightly higher with the triangular flap than with the envelop flap, the difference was not statistically significant. In regards to the number of sutures placed distal to the second molar, the incidence and severity of wound dehiscence decreases as we place more number of sutures.