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首页> 外文会议>Conference on Lasers in Dentistry Ⅷ, Jan 20-21, 2002, San Jose, USA >SEM evaluation of smear layer removal by Er: YAG laser in root canals
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SEM evaluation of smear layer removal by Er: YAG laser in root canals

机译：SEM评价牙根管中Er：YAG激光去除污点层

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摘要

The effects of two endodontic irrigants associated or not with Er:YAG laser on a smear layer created by hand instrumentation were evaluated in vitro in the middle and apical thirds of root canals. Twenty five human maxillary canines with a single root were distributed randomly into five groups of five teeth each. Group 1 was irrigated with sodium hypochlorite 1.0%, Group 2 received EDTAC 15% as irrigating solution and Group 3 received both NaClO 1.0% and EDTAC 15%. Group 4 was irrigated with distilled water and irradiated with Er:YAG laser. Group 5 received NaClO 1.0% as irrigating solution and was irradiated with Er:YAG laser. Teeth were split longitudinally and prepared for examination under scanning electron microscopy. The teeth irrigated with NaClO (Group 1) showed the higher amount of smear layer, with statistically significant differences (p < 0.05) from the teeth irrigated with distilled water and irradiated with Er:YAG laser (Group 4), which showed intermediate amounts of smear layer. The teeth irrigated with EDTAC 15%, NaCIO 1.0% associated with EDTAC 15% and NaClO 1.0% with Er:YAG laser (Groups 2, 3 and 5) showed the lowest amounts of smear layer, being statistically similar between them and different (p < 0.05) from Groups 1 and 4. There were no differences between the radicular thirds. It can be concluded that irradiation with Er:YAG laser can be as effective as EDTAC 15% when used associated with 1.0% sodium hypochlorite, but not as effective when used together with distilled water.
机译：在牙根管的中部和顶端，在体外评估了两种与Er：YAG激光相关或不相关的牙髓冲洗液对手动器械产生的涂片层的影响。将二十五个单根人类上颌犬随机分为五组，每组五颗牙齿。第1组用1.0％的次氯酸钠灌溉，第2组使用15％的EDTAC灌溉液，第3组同时使用1.0％的NaClO和15％的EDTAC。第4组用蒸馏水冲洗并用Er：YAG激光照射。第5组接受1.0％NaClO作为冲洗溶液，并用Er：YAG激光照射。纵向切开牙齿并准备在扫描电子显微镜下检查。用NaClO冲洗的牙齿（第1组）显示较高的涂片层，与用蒸馏水冲洗并用Er：YAG激光照射的牙齿（第4组）具有统计学上的显着差异（p <0.05）。涂抹层。用Ed：YAG激光（第2、3和5组）分别用EDTAC 15％，NaCIO 1.0％和EDTAC 15％和NaClO 1.0％（第2、3和5组）冲洗牙齿的涂片层数量最少，在统计学上相似，不同之处之间（p <0.05），来自第1组和第4组。可以得出结论，当与1.0％的次氯酸钠结合使用时，用Er：YAG激光照射可以达到与15％的EDTAC一样有效，但与蒸馏水一起使用时却没有效果。

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