Jho Wonkyung, Park Jeong-Won, Kim Euiseong, Song Minju, Seo Deok-Gyu, Yang Dong-Kyu, Shin Su-Jung
Department of Conservative Dentistry, College of Dentistry, Gangnam Severance Hospital, Yonsei University.
Dent Mater J. 2016;35(4):644-50. doi: 10.4012/dmj.2015-262.
The aims of this study were to evaluate the quality of canal filling using mineral trioxide aggregate (MTA) and gutta-percha (GP) in root canals, and to investigate the differences in the percentage of voids between mesial and distal canals by using microcomputed tomography. Twenty-two extracted human mandibular molars were instrumented using rotary files. Two teeth without canal fillings served as negative controls, and the other teeth were obturated with either ProRoot(®) MTA or gutta-percha and AH Plus(®) sealer. Obturated teeth were scanned with microcomputed tomography, and the percentage of voids (V%) was calculated. These specimens were also examined under a scanning electron microscope. The MTA group showed a significantly higher V% than the GP groups (p<0.05). The mesial canal groups showed significantly higher V% than did the distal canal groups (p<0.05). In orthograde filling, MTA exhibited significantly lower filling quality than did GP.
本研究的目的是评估根管内使用三氧化矿物凝聚体（MTA）和牙胶（GP）进行根管充填的质量，并通过显微计算机断层扫描研究近中根管和远中根管之间的空隙百分比差异。使用旋转锉对22颗拔除的人下颌磨牙进行根管预备。两颗未进行根管充填的牙齿作为阴性对照，其他牙齿分别用ProRoot® MTA或牙胶和AH Plus®封闭剂进行充填。对充填后的牙齿进行显微计算机断层扫描，并计算空隙百分比（V%）。这些标本也在扫描电子显微镜下进行检查。MTA组的V%显著高于GP组（p<0.05）。近中根管组的V%显著高于远中根管组（p<0.05）。在顺行充填中，MTA的充填质量显著低于GP。
