微波根管消毒的实验研究

Experimental Study on Infective Root Canal Sterilization with Microwave

[目的]探讨微波根管消毒的确切疗效。[方法]通过离体牙扫描电镜观察微波根管消毒前后根管壁的变化;采用细菌培养法检测并比较微波法(10例)和甲醛甲酚(FC)法(10例)的灭菌效果;观察并比较微波消毒一次性根管治疗(20例)和常规法根管治疗(20例)的近期疗效。[结果]扫描电镜观察显示微波照射后根管壁表面呈熔融状态,牙本质小管口封闭;细菌学观察显示:与FC法相似,微波对需氧菌和厌氧菌均有良好的杀灭效果,其细菌检出率均为0;微波消毒一次性根管治疗和常规法根管治疗的近期疗效均良好,两者间无显著性差异(P>0.05)。[结论]微波对感染根管的消毒作用可靠,可代替药物消毒,在临床上具有很好的应用前景。

[Objective] To study the effects of microwave sterilization on infective root canal. [Methods] The changes of the wall of root canal after microwave radiation were observed by scanning electron microscopy (SEM) . Aerobe and anaerobe were fostered before and after root canal sterilization with microwave assay (10 cases) or FC assay (10 cases) . The short-term therapeutic effects of one-visit root canal therapy with microwave radiation (20 cases) and routine ways (20 cases) were compared . [ Results] The result of SEM observation showed that the wall of root canal presented a series of changes after microwave radiation, including melted dentinal tubules and closed opening of dentinal tubules. Bacteriological observation showed that microwave had the same sterilization effects on aer-obes and anaerobes as FC assay. The positive detection of bacteria was zero. The short-term therapeutic results of one-visit root canal therapy with microwave radiation and routine ways were both quite good. There was no significant difference between the two methods ( P >0.05). [Conclusion] The sterilization effect of microwave radiation is reliable to infective root canal. It can replace sterilization with drugs and can be widely used in clinical practice.