通过扫描电子显微镜比较冷陶瓷和矿物三氧化物凝聚体的边缘适应性：一项体外研究。
Comparing the Marginal Adaptation of Cold Ceramic and Mineral Trioxide Aggregate by Means of Scanning Electron Microscope: An In vitro Study.
作者信息
Mokhtari Fatemeh, Modaresi Jalil, Javadi Gholamreza, Davoudi Amin, Badrian Hamid
机构信息
Assistant Professor, Department of Endodontics, Dental School, Shahid Sadoughi University of Medical Science, Yazd, Iran.
Associate Professor, Department of Endodontics, Social Determinant of Oral Health Research Center, School of Dentistry, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.
出版信息
J Int Oral Health. 2015 Sep;7(9):7-10.
BACKGROUND
Long-term success of endodontic surgeries is often influenced by the type of root-end filling material (RFM). The aim of present study was to compare the marginal adaptation of two different RFM, cold ceramic (CC) and mineral trioxide aggregate (MTA), using scanning electron microscope (SEM).
MATERIALS AND METHODS
About 20 extracted human single-rooted teeth were collected and stored into sodium hypochlorite 5.25%. The teeth were decronated from the cemento-enamel junction to prepare 16 mm roots. The working length was measured, and 1/3 coronal of the canal was prepared by Gates-Glidden drills. Apical flaring was followed by K file size # 40-70 based on step back technique. After filling of the canals, 3 mm above the apex was cut at 90° to the long axis. Furthermore, 3 mm of the filling was removed from the apical part using the ultrasonic device. All of the prepared specimens were divided into two groups and were retro filled by MTA and CC. The roots were cut horizontally from 1 mm above the apical part, and dentin-filling material interface was observed by SEM. Finally, the collected data were analyzed by Mann-Whitney test and using SPSS software version 18 at a significant level of 0.05.
RESULTS
The mean interfacial adaptation was higher in CC group. However, no significant differences were observed by statistical test (P = 0.35).
CONCLUSION
Both CC and MTA had similar marginal adaptation as RFM however in vivo studies are recommended for better determination.
背景
牙髓手术的长期成功率通常受根充材料类型的影响。本研究的目的是使用扫描电子显微镜（SEM）比较两种不同根充材料——冷陶瓷（CC）和三氧化矿物凝聚体（MTA）的边缘适应性。
材料与方法
收集约20颗拔除的人单根牙并储存在5.25%的次氯酸钠中。从牙骨质-釉质界处截短牙齿以制备16毫米长的牙根。测量工作长度，并用盖茨-格利登钻制备根管冠方的1/3。根据逐步后退技术，用40-70号K锉进行根尖扩孔。根管充填后，在与长轴成90°角处从根尖上方3毫米处切断。此外，使用超声设备从根尖部分去除3毫米的充填物。所有制备的标本分为两组，分别用MTA和CC进行倒充填。从根尖上方1毫米处水平切断牙根，用SEM观察牙本质-充填材料界面。最后，收集的数据采用曼-惠特尼检验进行分析，并使用SPSS 18.0软件，显著性水平为0.05。
结果
CC组的平均界面适应性更高。然而，经统计学检验未观察到显著差异（P = 0.35）。
结论
CC和MTA作为根充材料具有相似的边缘适应性，不过建议进行体内研究以更好地确定。
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