例1：杨某某，男，68岁。因“阵发性牙痛7d”而就诊。患者述近日来困活动后，突然发现双侧后下牙疼痛，休息2～5min后。疼痛缓解，既往无高血压史。体温37．8℃、脉搏100次／min，呼吸22次／min，血压14／10kPa。口腔检查：可摘局部义齿修复，面银汞合金充填，叩（一），X线片 Example 1: Yang Moumou, male, 68 years old. Due to “paroxysmal toothache 7d” and treatment. In recent days, patients with sleepy activity, suddenly found after bilateral lower back pain, rest 2-5min later. Pain relief, no previous history of hypertension. Body temperature 37.8 ℃, pulse 100 beats / min, breathing 22 times / min, blood pressure 14 / 10kPa. Oral examination: Removable partial denture repair, surface silver amalgam filling, knocking (a), X-ray