2 顳顎機能障礙 (temporomandibular dysfunction)中最常見的是:
顳顎關節內部紊亂(internal derangement of the temporomandibular joint)
顳顎關節之骨性關節炎(osteoarthritis of the temporomandibular joint)
顳顎關節之慢性復發性脫位(chronic recurrent dislocation of the temporomandiublar joint)
肌筋膜疼痛及機能障礙(myofascial pain and dysfunction)