牙本质敏感的钕：钇-铝石榴石激光治疗

摘要

Closing dentinal tubule is the basic guiding idedogy in the treatment of dentin hypersensitiveness(DH), but most of the traditional methods only have a short-term effect due to chew and wear of the desensitization agent coating on dentin surface. However using neodymium:yttrium-aluminum-garnet(Nd:YAG) laser in the treatment of DH can reach a more than 90% dentinal tubule closure rate, and no pits, cracks and carbonization destruction appear in dentin surface when the laser parameter is 1.5 W, 396 J·cm-2. When the temperature increment caused by laser irradiation does not exceed 5 ℃for pulp chamber, and the increment of root surface does not exceed 10 ℃, it won’t cause any damage to the tooth pulp and periodontal tissue. Using Nd:YAG laser in the treatment of DH can reach quick and obvious curative effect, but there are also obstructive factors in the application of Nd:YAG laser such as dental fear, treatment risks, instrument limitations and the high costs. And in the process of using Nd:YAG laser, attention should be paid to the protection of eyes of patients and operators.%封闭开放的牙本质小管口是现代牙本质敏感（DH）治疗的基本指导思想，而大多数传统的治疗方法仅短期内有效，其原因可能缘于咀嚼和磨损等导致牙体表面脱敏剂涂层再次磨耗。以1.5 W、396 J·cm-2的钕：钇-铝石榴石（Nd：YAG）激光治疗，DH的牙本质小管口的封闭率达到90%以上，牙本质表面也不会出现凹坑、裂纹和碳化等破坏。Nd：YAG激光照射引起的局部温度升高，若髓腔温度升高在5 ℃以内，牙根表面温度升高在10 ℃以内则不会损伤牙髓和牙周组织。Nd：YAG激光治疗DH见效迅速、疗效明显，但影响其治疗的因素主要有患者畏惧、治疗风险、设备局限和成本高昂等。在Nd：YAG激光治疗DH的过程中，要注意患者和施术者眼睛的防护。