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牙齿是身体中最硬的组织。牙髓含有丰富的血管和神经,受到刺激可引起疼痛。常见引起牙痛的疾病有以下几种: 由牙齿疾病引起的牙痛 1、牙本质过敏症:正常的牙冠外层复盖着牙釉质,对各种刺激有一定的抵抗力。由于磨耗、外伤而引起牙釉质缺损时,可致牙本质外露,由于牙本质中含有牙髓神经末梢,对外来的酸、甜、冷、热、机械刺激引起酸痛。牙齿的(牙合)面或颈部有黄色牙本质外露,用探针轻轻一碰就引起酸痛。 2、牙髓充血;是深龋的一种继发的病理变化,患牙常有龋洞、发黑,质软成洞,对热、甜、酸食物感到疼痛,特别是对冷刺激更加明显,但没有自发痛。 3、牙髓炎:在急性牙髓炎时,疼痛为尖锐、间隙性、夜间痛,甚至有跳痛;疼痛可放射到三叉神经分布区
Teeth is the hardest tissue in the body. Pulp is rich in blood vessels and nerves, which can cause pain when stimulated. A common cause of toothache disease are the following: Toothache caused by dental diseases 1, dentin hypersensitivity: The normal crown is covered with enamel outer layer, a variety of incentives have some resistance. Due to abrasion, trauma caused by enamel defects, can cause dentin exposure, due to dental pulp containing the nerve endings, the external acid, sweet, cold, heat, mechanical irritation caused by pain. Dental (occlusal) face or neck with yellow dentin exposed, gently touched with the probe caused by pain. 2, pulp congestion; is a secondary pathological changes of deep caries, dental cavities often have teeth, black, soft hole into the hot, sweet, sour food, feel pain, especially for cold stimulation is more obvious , But no spontaneous pain. 3, pulpitis: acute pulpitis, the pain is sharp, intermittent, night pain, and even jump pain; pain can radiate to the trigeminal nerve distribution