Kharouf Naji, Pedullà Eugenio, La Rosa Giusy Rita Maria, Bukiet Frédéric, Sauro Salvatore, Haikel Youssef, Mancino Davide
Faculté de Chirurgie Dentaire, Université de Strasbourg, 8 rue Sainte Elisabeth, 67000 Strasbourg, France.
Institut National de la Santé et de la Recherche Médicale, Unité Mixte de Recherche 1121, 11 rue Humann, 67085 Strasbourg, France.
J Clin Med. 2020 Oct 16;9(10):3325. doi: 10.3390/jcm9103325.
To investigate the influence of pre-endodontic coronal wall restoration on smear layer removal during different root canal irrigation strategies, single-root premolars were prepared with a mesio-occlusal cavity. Half were left untreated (G1), while the mesial walls of the remaining half were reconstructed using a resin composite (G2). The specimens were divided into control (ctrl) groups, which used the conventional needle irrigation method, and four experimental subgroups according to irrigation strategy: Sonic activation using the Endoactivator, sonic activation using the EQ-S, mechanical activation using the XP-Endo finisher, and ultrasonic activation using the EndoUltra. Smear layer removal was assessed through SEM and the results were statistically analyzed. At the coronal and middle thirds, no significant difference ( > 0.05) was detected for G1 and G2, except for the control subgroups (G1ctrl vs G2 ctrl) at the middle third. At the apical third, the smear layer removal was significantly greater for G2 than G1. In G1, both at the middle and apical level, EQ-S and EndoUltra showed greater smear layer removal ( < 0.05) compared to the others G1 subgroups. In G2, at the apical level, the EQ-S and EndoUltra were the most effective in smear layer removal. Pre-endodontic coronal wall restoration may improve the smear layer removal during root canal irrigation.
为研究根管治疗前冠壁修复对不同根管冲洗策略下玷污层去除的影响，制备近中咬合面洞型的单根前磨牙。一半不作处理（G1组），另一半的近中壁用树脂复合材料重建（G2组）。将标本分为采用传统针管冲洗法的对照组（ctrl组），以及根据冲洗策略划分的四个实验组：使用Endoactivator进行声波激活、使用EQ-S进行声波激活、使用XP-Endo finisher进行机械激活、使用EndoUltra进行超声激活。通过扫描电子显微镜（SEM）评估玷污层去除情况，并对结果进行统计学分析。在冠部和中三分之一处，G1组和G2组之间未检测到显著差异（>0.05），中三分之一处对照组亚组（G1ctrl组与G2ctrl组）除外。在根尖三分之一处，G2组的玷污层去除明显大于G1组。在G1组中，在中部和根尖水平，与其他G1亚组相比，EQ-S和EndoUltra显示出更大的玷污层去除效果（<0.05）。在G2组中，在根尖水平，EQ-S和EndoUltra在玷污层去除方面最有效。根管治疗前冠壁修复可能会改善根管冲洗过程中的玷污层去除效果。
