The study of clinical application of Nd : YAG laser in pediatric dentistry

激光在儿童牙科的临床应用是预防龋齿和抑制脱矿。本研究的目的是评价脉冲Nd: YAG激光照射和氟化治疗未成熟恒牙光滑面牙釉质早期龋的临床有效性。观察脉冲Nd: YAG激光（20 pps, 40 mJ, 0.5 s）照射2年对32颗未成熟恒牙早期龋的影响。结果表明，激光照射加氟化治疗对90.6%的未成熟恒牙疗效显著。然而，牙髓和牙周组织并没有受到影响。由此可见，脉冲Nd: YAG激光照射加氟化治疗的临床有效性，但在临床应用中存在更多问题，需要进一步考察其适应性。并对创伤脱落的乳牙和恒牙成功再植，应用脉冲Nd: YAG激光照射，观察其对牙根不均匀吸收和防止脱落的影响。Nd: YAG脉冲激光照射牙骨质对破骨细胞的粘附有抑制作用，但对牙周韧带成纤维细胞的粘附无抑制作用。但附着力差异的一个因素是未知的，这必须检查一个左主题。

The clinical application of laser in pediatric dentistry was caries prevention and inhibition of demineralization. The purpose of this study was an appreciation for clinical validity of using both pulsed Nd : YAG laser irradiation and fluoridization for early caries of smooth surface enamel of immatured permanent teeth. The study was observation an effect of pulsed Nd : YAG laser irradiation (20 pps, 40 mJ, 0.5 s) for early caries of immatured permanent 32 teeth for 2 years. In effect, using both laser irradiation and fluoridization was observation validity effect for 90.6 % of immatured permanent teeth. Although, dental pulp and periodontium was not affected by that way. From that effect, clinical validity of the way of using both pulsed Nd : YAG laser irradiation and fluoridization was showed, but an adaptability of that way must be examined for more problems in clinical application.And for the replantation of shedding primary teeth and permanent teeth by trauma succeed, the application of pulsed Nd : YAG laser irradiation was examined whether that effect or not for an amorbid root resorption and prevention of shedding. The pulsed Nd : YAG laser irradiation for cementum inhibited adhesive of osteoclasts in irradiated surface, but the adhesion of fibroblasts of periodontal ligament was not inhibited. But a factor of difference of adhesion is unknown, that must be examined a left subject.