Introduction: The aim of this study was to compare the quality of root fillings completed by a modified single-cone (MSC) technique with 3 different sealers after minimal instrumentation and multisonic cleaning of root canals of maxillary first molars. Methods: Root canals of 18 maxillary first molars were instrumented to size 15/.04 taper using rotary files. Sodium hypochlorite 5.25% was used during instrumentation; the final cleaning was performed by the GentleWave System (Sonendo Inc, Laguna Hills, CA). The specimens were allocated into 3 groups and root filled by the MSC technique using a size fitted gutta-percha master cone and GuttaFlow Bioseal (Coltene Whaledent GmBH + Co KG, Langenau, Switzerland), GuttaFlow 2 (Coltene Whaledent GmBH + Co KG), and MTA Fillapex (Angelus Industria de Produtos Odontologicos S/A, Londrina, PR, Brazil) sealers. Micro-computed tomographic scans were obtained before and after instrumentation, post-GentleWave, and after obturation. Reconstructed images were analyzed for the volumetric percentage of filling materials. Mesiobuccal roots of the selected teeth were sectioned at 0.5-mm increments starting at the apex of the root. The cross sections were further examined using a light microscope. Results: The 3 groups had 90%-99% of the canal space filled with the root filling material. The mean volume of the filling material was higher in the GuttaFlow Bioseal and GuttaFlow 2 groups than in the MTA Fillapex group (P < .05). There was no significant difference among the apical, middle, and coronal thirds. The cross-sectional images showed no obvious gaps or voids in the GuttaFlow groups. After instrumentation, 49 of the 189 canal thirds (25.9%) had hard tissue debris in the root canal system. After GentleWave cleaning, only 4 of 63 canals (6.3%) and 4 of the 189 canal thirds (2.1%) still had debris. Conclusions: The MSC method with GuttaFlow 2 and GuttaFlow Bioseal sealers after multisonic cleaning of minimally instrumented molar canals resulted in high-quality root fillings. Multisonic cleaning of minimally instrumented molars seems to be effective in debris removal.
第一作者单位：[1]Guangxi Med Univ, Coll & Hosp Stomatol, Dept Cariol & Endodontol, Nanning 530021, Peoples R China[2]Univ British Columbia, Dept Oral Biol & Med Sci, Div Endodont, Fac Dent, 2199 Wesbrook Mall, Vancouver, BC V6T 1Z3, Canada
通讯作者：
推荐引用方式(GB/T 7714)：
Zhong Xiaoyi,Shen Ya,Ma Jingzhi,et al.Quality of Root Filling after Obturation with Gutta-percha and 3 Different Sealers of Minimally Instrumented Root canals of the Maxillary First Molar[J].JOURNAL OF ENDODONTICS.2019,45(8):1030-1035.doi:10.1016/j.joen.2019.04.012.
APA：
Zhong, Xiaoyi,Shen, Ya,Ma, Jingzhi,Chen, Wen-Xia&Haapasalo, Markus.(2019).Quality of Root Filling after Obturation with Gutta-percha and 3 Different Sealers of Minimally Instrumented Root canals of the Maxillary First Molar.JOURNAL OF ENDODONTICS,45,(8)
MLA：
Zhong, Xiaoyi,et al."Quality of Root Filling after Obturation with Gutta-percha and 3 Different Sealers of Minimally Instrumented Root canals of the Maxillary First Molar".JOURNAL OF ENDODONTICS 45..8(2019):1030-1035
