Oral and maxillofacial surgeons in our department treat impacted wisdom teeth, facial and TMJ pain and abnormal jaws, facial injuries, reconstructive maxillofacial surgery and dental facial implant surgery, tumors and cysts of the jaws . We also perform general dental treatment oral care for patients with general cancers. Our clinical and basic researches are as follows. Bone regeneration induced by dynamic stimulation (LIPUS, UV and LASER). The analysis of the relation between jaw morphplogy and temporomandibular morpology. The assessment of the lip hypoesthesia after oryhognathic surgery with trigeminal sensory evoked potential. The image analysis of mode of invasion of oral cancer. Molecular biology of oral cancer, espicially filed of invasion and epethelial-mesenchymal-transition. Efficacy of tobacco cessation for improving oral diseases – multicentre trial.