Mandibular reconstructive surgery is an indispensable operative procedure for a patient who received a radical surgery for oropharyngeal cancer to maintain their speech, swallowing, respiratory and masticating function. Serious cosmetic problem appearance would also arise after the craniofacial operation that associate with major mandibular defects. Primary mandibular reconstruction frequently require provision for interoral lining, tongue and as well as lateral wall of oropharynx.Scapular osteocuntaneous free flap is preferred for reconstruction of mandible. Because scapular osteocutaneous free flap has great flexibility in three-dimensional reconstruction and can be combined with other flaps based on the circumflex scapular artery. In this study, masticating function among 20 cases of mandibular reconstruction by scapular osteocutaneous flap were quantitated using dental prescale occluzer system.The postoperative mandibular mastication was dependent on the number of remaining natural teeth, the presence of adhesion between denture and the mobility of remaining tongue. Good mastication are expected in the case of good adherence of denture and remaining natural teeth were obtained. Osteointegrated implants are adequate for total mandibular reconstruction.