血液污染对冷瓷和 MTA Angelus 边缘适应性的影响：扫描电子显微镜研究。
Effect of blood contamination on marginal adaptation of cold ceramic and MTA angelus: a scanning electron microscopic study.
机构信息
Department of Endodontics, Dental School of Shahid Sadoughi University of Medical Sciences, Yazd, Iran.
School of Dentistry, Imam Reza Street, Yazd, 8914815667, Iran.
出版信息
BMC Oral Health. 2023 Sep 30;23(1):706. doi: 10.1186/s12903-023-03437-6.
BACKGROUND
This study aimed to assess the effect of blood contamination on marginal adaptation of cold ceramic (CC) and mineral trioxide aggregate (MTA) Angelus using scanning electron microscopy (SEM).
METHODS
This in vitro experimental study was conducted on 24 extracted single-rooted human teeth. After cleaning and shaping, the root canals were filled with lateral compaction technique. The apical 3 mm of the roots was cut, and cavities with 3 mm depth were created at the apex. The teeth were randomly assigned to two group (n = 12) for the application of CC and MTA Angelus as retrograde filling materials. CC and MTA Angelus were prepared by mixing the powder with blood, and applied in the cavities. After 24 h, their marginal adaptation to the canal walls was assessed by SEM. Data were statistically analyzed by t-test (alpha = 0.05).
RESULTS
The mean marginal gap was 8.98 μm in the CC, and 16.26 μm in the MTA Angelus group; this difference was statistically significant (P < 0.001).
CONCLUSIONS
The present in vitro study revealed that following complete blood contamination of powder, CC showed significantly superior marginal adaptation than MTA Angelus as shown by SEM assessment.
背景
本研究旨在通过扫描电子显微镜（SEM）评估血液污染对冷瓷（CC）和矿物三氧化物聚合体（MTA）Angelus 边缘适应性的影响。
方法
这是一项在 24 颗离体单根人牙上进行的体外实验研究。根管清洁和成形后，采用侧向压实技术进行根管填充。根尖 3mm 处的牙冠被切割，在根尖处制备深度为 3mm 的腔。将牙齿随机分为两组（每组 n=12），分别应用 CC 和 MTA Angelus 作为逆行填充材料。CC 和 MTA Angelus 是通过将粉末与血液混合制备而成，并应用于腔中。24 小时后，通过 SEM 评估它们对根管壁的边缘适应性。采用 t 检验（α=0.05）对数据进行统计学分析。
结果
CC 组的平均边缘间隙为 8.98μm，MTA Angelus 组为 16.26μm；差异具有统计学意义（P<0.001）。
结论
本体外研究显示，在粉末完全血液污染后，CC 在 SEM 评估中显示出明显优于 MTA Angelus 的边缘适应性。
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