Lan W H, Liu H C, Lin C P
Graduate Institute of Dental Sciences, College of Medicine, National Taiwan University, Taipei, Republic of China.
J Endod. 1999 Jun;25(6):424-6. doi: 10.1016/S0099-2399(99)80271-4.
Various methods and materials used in the treatment of dentin hypersensitivity are thought to achieve a therapeutic benefit by tubule occlusion. The aim of the present study was to evaluate the combined occluding effect of sodium fluoride varnish and Nd:YAG laser irradiation on human dentinal tubules. Thirty-six dentin specimens with exposed dentinal tubule orifices were used in this study. The samples were randomly divided into four groups. Groups A, B, and C were varnished by sodium fluoride, whereas group D served as a control. Then, group C was lased by 30 mJ of Nd:YAG laser, 10 pulses/s for 2 min by light painting. Three hours later, groups B and C were brushed by an electrical toothbrush for 30 min. Under SEM observation, the control group showed numerous exposed dentinal tubule orifices, and the sodium fluoride varnished specimens showed closure of exposed dentinal tubule orifices. After electrical toothbrushing, most of the sodium fluoride varnish was brushed away, except in the specimens that were irradiated by Nd:YAG laser. Over 90% of the dentinal tubule orifices were occluded by sodium fluoride varnish combined with Nd:YAG laser irradiation.
治疗牙本质过敏症所使用的各种方法和材料被认为是通过封闭牙本质小管来实现治疗效果的。本研究的目的是评估氟化钠 varnish 与 Nd:YAG 激光照射联合对人牙本质小管的封闭效果。本研究使用了 36 个有暴露牙本质小管开口的牙本质标本。样本被随机分为四组。A 组、B 组和 C 组用氟化钠 varnish 处理，而 D 组作为对照组。然后，C 组用 30 mJ 的 Nd:YAG 激光照射，通过光刷以 10 脉冲/秒的频率照射 2 分钟。三小时后，B 组和 C 组用电牙刷刷牙 30 分钟。在扫描电子显微镜观察下，对照组显示有许多暴露的牙本质小管开口，而用氟化钠 varnish 处理的标本显示暴露的牙本质小管开口被封闭。电牙刷刷牙后，除了用 Nd:YAG 激光照射的标本外，大部分氟化钠 varnish 被刷掉。超过 90%的牙本质小管开口被氟化钠 varnish 与 Nd:YAG 激光照射联合封闭。
