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应用牙本质通透性测定装置，定量测定脉冲Ｎｄ：ＹＡＧ激光在不同参数条件下照射后对牙本质通透性的影响。结果表明：在４个不同的激光参数条件下，激光照射后牙本质通透性均较照射前呈显著性下降，其中以每秒１５个脉冲０．７５Ｗ的２．０ｍｉｎ组和每秒１５个脉冲１．００Ｗ的２．０ｍｉｎ组下降最为明显，与每秒１５个脉冲０．７５Ｗ的１．５ｍｉｎ组之间呈显著性差异（ＦＫＰＦＦ＜０．０５）。提示脉冲Ｎｄ：ＹＡＧ激光在一定参数条件下照射，可熔融和封闭牙本质小管，是治疗牙齿敏感症的有效手段之一
The dentin permeability measuring device was used to quantitatively determine the effect of pulsed Nd: YAG laser irradiation on dentin permeability under different parameters. The results showed that under the condition of 4 different laser parameters, dentin permeability decreased significantly after laser irradiation compared with that before irradiation, with 15 pulses per second at 2.0W for 0.75W and 15 per second The decrease of 2.0min in 1.00W pulse was the most obvious, which was significantly different from 1.5min in 15W pulse of 0.75W (FKPFF <0.05). Prompt pulsed Nd: YAG laser irradiation under certain parameters, to melt and seal the dentin tubules, is an effective means of treatment of tooth sensitivity