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磨牙■面窝沟是龋病最易发生的部位之一，为防止窝沟龋的发生，目前多采用窝沟封闭剂将窝沟封闭的方法，虽然该方法能够降低■面龋的发生率，但在封闭前需进行酸蚀处理，降低了局部的抗龋能力，封闭剂一旦脱落势必导致龋病的发生。为探讨Ｎｄ：ＹＡＧ激光的窝沟封闭防龋作用，
Molar ■ facial fissure is the most prone to caries one of the parts, in order to prevent the occurrence of pit and fissure caries, septal fissure sealant is currently used to seal the pit and fissure, although this method can reduce the incidence of ■ caries, But before closing the need for acid etching, reducing the local anti-caries ability, once the blocking agent off will inevitably lead to dental caries. In order to investigate the effect of Nd: YAG laser on the pit and fissure sealant,