comprised 9 patient undergoing surgical removal of deeply impacted mandibular third molar by regular manor.

(Based on :Panorama and CBCT ) technique : 1- flap design 2- bone removal 3- tooth division 4- closure flap (suture)

comprised 9 patient undergoing surgical removal of deeply impacted mandibular third molar using computer guided surgical cutting stent.

Based on (panorama , CBCT and fabricating computer guided stent technique: 1- flap design 2- accurate setting stent in a predesign site 3- bony window removing according to the stent design 4- surgical separation of the teeth with extraction the remaning part . 5- identify the nerve 6- replace the bony window in to original place with stability 7- closure and depridment

has three cutting guided plane for identify the position of place of the third molar, it have beveled cut for stability after remove the teeth and placing the bony window

each patient well be asked to rate current and worst pain intensity on visual analogue scale (VAS ) of 0-10 with Zero being no pain and Ten corresponds to the worst pain(pain change during follow up period .

assessment of MMO will be performed by measuring the distance in mm between the incisal edges of the upper and lower central incisor by using tape graduated method.