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- 2016
不同功率Diode激光用于乳牙根管清洁的体外研究
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Abstract:
摘要 目的: 评价不同功率Diode激光(810 nm)对乳牙根管壁玷污层的清除效果。方法: 选取66颗因滞留拔除的乳前牙,随机分为:阴性对照组(未处理,n=6)、阳性对照组(5.25%次氯酸钠冲洗, n=6)和实验组(Diode激光照射,n=54);实验组按不同激光功率分为0.1 W、0.5 W、1.0 W、1.5 W、2.0 W、2.5 W、3.0 W、3.5 W和4.0 W组(n=6)。将光纤头插入根管至工作长度后照射,扫描电子显微镜(SEM)观察根管内壁清洁效果。结果: SEM下可见根管上段、中段和下段分别在1.0W、1.5W和2.0W时有明显的清洁效果,优于与之相邻低功率组和阳性对照组(P<0.05),与高于此功率组相比无显著差异;功率在3.0 W时,根管管壁开始出现牙本质熔融。结论: Diode激光可有效清除乳牙根管玷污层,其有效功率范围为1.0~2.5 W,最佳功率为2.0 W
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