牙本质敏感的钕:钇-铝石榴石激光治疗

Dentin hypersensitiveness of neodymium:yttrium aluminum garnet laser treatment

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。

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.