<qa>  What was the difference between sum of post-operative measurements and sum of pre-operative measurements consideredPostoperative pain was assessed using a visual analog scale VAS of 10 point scale with a score of 0 measured no pain and 10 correspond to very severe pain.18 Mouth opening was measured using the maximum distance between the maxillary central incisors and the mandibular central incisors. The difference between sum of post-operative measurements and sum of pre-operative measurements was considered as trismus. The evaluation of the facial swelling was performed by modification of Schultze-Mosgau et al method,19 and the facial measurements involved: 1. Tragus to the oral commissure 2.Tragus to the pogonion. The difference between sum of post-operative facial measurements and sum of pre-operative facial measurements was considered as facial swelling. 