患者,女,50岁,干部。因牙痛及牙龈溃烂出血,左侧颞颌关节弹响及左耳鸣三年余,来我科就诊。检查■(牙合)向伸长4—6mm,牙唇面磨损达牙本质,■根管外露,牙根外露3—6mm,■牙冠腭侧倾斜25度,下前牙龈缘充血糜烂易出血,上前牙切缘咬到下前牙唇侧龈缘。张闭口活动时,左 Patient, female, 50 years old, cadre. Due to toothache and gum ulceration bleeding, left temporomandibular joint snapping and left tinnitus more than three years, to our department. Check ■ (occlusal) to the elongation of 4-6mm, tooth and face wear dentin, ■ root canal exposed, root exposed 3-6mm, ■ crown tilted 25 degrees palatal, gingival margin erosion of the lower edge of bleeding easily bleeding, The anterior teeth bite to the lower lip gingival margin. Zhang closed mouth activities, left