摘要
目的研究脉冲钕钇铝石榴石(neodymium-doped yttrium aluminum garnet,Nd:YAG)激光与氟化钠联合应用预防根面龋的作用。方法 48颗因正畸拔除的健康牙用指甲油开窗后随机分为4组:对照组、激光处理组各14颗,氟化钠处理组、激光氟化钠处理组各10颗。4组各10颗置于变形链球菌细菌悬液中行人工致龋。取所有标本牙的开窗区牙体组织,扫描电镜下观察正常根面牙骨质、激光照射后的根面牙骨质及人工龋根面牙骨质表面的超微结构改变。结果电镜下,氟化钠组、激光组、激光氟化钠组的硬组织脱矿、胶原纤维断裂等龋损改变均较对照组轻,其中激光氟化钠组改变最小。结论激光照射可改变牙骨质表面形态;激光照射与氟化钠对根面龋的发生均有一定的预防作用,二者联合应用效果更好。
Objective To evaluate caries-preventive effects of Nd：YAG laser and NaF on artificial root caries.Methods Selecting healthy premolars extracted for orthodontic reasons for this study.These teeth were randomly divided into four groups and disposed respectively： control group,NaF treated group,laser irradiated group,laser-NaF treated group.All the samples were immerged in S.mutans cultivation fluid to make artificial root caries.Observing the morphological changes of root surface.Results Scanning electron microscope observation show： the demineralization and matrix fibre ruptured of control group was more obvious than other three groups.Compared with control group,NaF treated group,laser irradiated group and laser-NaF treated group all had remarkable difference,and when the two former groups comparing with each other there no remarkable difference.Conclusion Root caries-preventive effects of combining two methods were more effective.
出处
《广东牙病防治》
2010年第10期528-530,共3页
Journal of Dental Prevention and Treatment
关键词
脉冲ND:YAG激光
氟化钠
根面龋
龋病预防
扫描电镜
Pulsed Nd：YAG laser
Sodium fluoride
Root caries
Prevention of caries
Scanning electron microscope
