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

激光在儿童牙科的临床应用主要是防龋和抑制脱矿。本研究的目的是评价脉冲Nd：YAG激光照射和氟化治疗年轻恒牙光滑面釉质早期龋的临床有效性。采用脉冲Nd：YAG激光（20 pps，40 mJ，0.5 s）照射32颗年轻恒牙，观察2年的治疗效果。结果表明，激光照射结合氟化处理对90.6%的年轻恒牙有良好的疗效.但对牙髓和牙周组织无明显影响。结果表明，脉冲Nd：YAG激光照射与氟化联合应用的临床效果是有效的，但在临床应用中还存在许多问题，其适应性有待检验，而对于外伤性乳恒牙脱落再植成功的病例，脉冲Nd：YAG激光照射与氟化联合应用是可行的。观察YAG激光照射对牙根吸收和脱落的影响。脉冲Nd：YAG激光照射牙骨质可抑制照射面破骨细胞的粘附，但对牙周膜成纤维细胞的粘附无明显抑制作用。但粘附力差异的一个因素是未知的，必须检查左受试者。

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.