O dontectomy is one of the most common procedures performed by dentists and oral maxillofacial surgeons. Odontectomy was performed to remove impacted third molars. In the maxilla, maxillary sinus perforation during retrieval upper third molar teeth is a relatively frequent complication, with the frequency of occurrence between 0.41 % - 4.7 %. This can be happened because the vicinity of impacted teeth and the sinus. Factors predisposing to perforation of the maxillary sinus is the large area of the sinus. While the direct cause of perforation of the maxillary sinus is not the pathological state such as cysts and granulomas in the direction of the sinus but due to the actions of a lesion curettage and revocation root of the maxillary posterior teeth. Treatment of the maxillary sinus perforation in the area of the maxillary third molars selected palatal pedicle flap technique rotated. In mandibulla alveolar osteoitis is a frequent complication after lower third molar extractions are depicted with great pain, this situation began in the second or third day after surgery. There is great variation in the reported incidence rates ranged between 0.3 % - 2.6 %. The etiology is multifactorial but basically as a result of an blood clot lysis of post- extraction. Alveolar osteitis treatment can be done by irrigation with warm saline solution or warm saline on parts that have alveolitis and put gauze impregnated with eugenol were replaced approximately every 24 hours until the pain subsides. After completion of treatment all patients should be advised to come back to the surgeon or hospital immediately if they experience an increase in pain and discomfort.