合成组织液对灰色和白色矿物三氧化物凝聚体作为根尖充填材料微渗漏的影响：一项体外研究。

Effect of Synthetic Tissue Fluid on Microleakage of Grey and White Mineral Trioxide Aggregate as Root-End Filling Materials: An in vitro study.

作者信息

Lotfi Mehrdad, Vosoughhosseini Sepideh, Saghiri Mohammad Ali, Rahimi Saeed, Zand Vahid, Reyhani Mohammad Forough, Samiei Mohammad, Ghasemi Negin, Mehrvarzfar Payman, Azimi Shahram, Shokohinejad Noushin

机构信息

Research Center of Pharmaceutical Nano Technology, Tabriz University (Medical Sciences), Tabriz, Iran;

出版信息

Sultan Qaboos Univ Med J. 2012 Aug;12(3):323-9. doi: 10.12816/0003146. Epub 2012 Jul 15.

DOI:10.12816/0003146

PMID:22912925

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC3413623/

Abstract

OBJECTIVES

The success of endodontic surgery has been shown to depend partly on the apical seal. Grey mineral trioxide aggregate (GMTA) produces hydroxyapatite twice as often as white mineral trioxide aggregate (WMTA) when suspended in a phosphate buffered saline (PBS) solution. The aim of this in vitro study was to compare the microleakage phenomenon of gray and white mineral trioxide aggregates as root-end filling materials after immersion in synthetic tissue fluid (STF).

METHODS

55 single-rooted extracted maxillary anterior human teeth were divided into two experimental groups of 20 teeth each, plus 3 groups of 5 teeth each as two negative and one positive control groups. The root canals were cleaned, shaped, and laterally compacted with gutta-percha. The root ends were resected and 3 mm deep cavities were prepared. The root-end preparations were filled with GMTA or WMTA in the experimental groups. Leakage was determined using a dye penetration method. Data were analysed using analysis of variance (ANOVA) at the 0.05 level of significance.

RESULTS

The mean dye leakage was 0.40 ± 0.1 mm for GMTA and 0.50±0.1 mm for WMTA groups, respectively. There was no significant difference between the two experimental groups (P = 0.14).

CONCLUSION

Despite the different properties and behaviours of GMTA and WMTA in STF, there were no significant differences in microleakage when using GMTA or WMTA.

摘要

目的

牙髓手术的成功已被证明部分取决于根尖封闭。当悬浮于磷酸盐缓冲盐水（PBS）溶液中时，灰色矿物三氧化物凝聚体（GMTA）产生羟基磷灰石的频率是白色矿物三氧化物凝聚体（WMTA）的两倍。本体外研究的目的是比较灰色和白色矿物三氧化物凝聚体作为根充材料浸泡在合成组织液（STF）后微渗漏现象。

方法

55颗单根拔除的人上颌前牙被分为两个实验组，每组20颗牙，另外还有3组，每组5颗牙，分别作为两个阴性对照组和一个阳性对照组。根管进行清理、预备，并用牙胶侧向加压充填。切除牙根尖端，制备3mm深的窝洞。实验组的根端预备物用GMTA或WMTA充填。采用染料渗透法测定渗漏情况。数据采用方差分析（ANOVA）在0.05显著性水平进行分析。