患者，女性，32岁，右侧上颌磨牙间歇性痛约6个月，近2周疼痛加剧。于1996年12月24日来院就诊，并要求拔除疼痛病牙，患者自述有冷、热刺激痛，曾有夜间痛，并向同侧头部放散。在当地卫生室曾口取抗菌、镇痛药物（螺旋霉素、安痛定、氨酚待因等）稍有好转。口腔检查：口腔卫生 Patient, female, 32 years old, right maxillary molars intermittent pain for about 6 months, nearly 2 weeks increased pain. She came to the hospital on December 24, 1996 and asked to remove the painful teeth. The patient readied her cold and heat to stimulate the pain. She had night pain and was discharged to the ipsilateral head. Antibiotics and analgesic drugs (spiramycin, analgesic, paracetamol, etc.) have been slightly improved in local health clinics. Oral examination: oral hygiene