Adel Mamak, Majd Nima Moradi, Samani Yasaman
Gen Dent. 2014 Jul-Aug;62(4):e34-6.
This study sought to investigate how pretreatment intracanal placement of calcium hydroxide (Ca(OH)2) affected the sealing ability of mineral trioxide aggregate (MTA) plugs in simulated open apices. Maxillary central incisor teeth were cleaned and shaped in an identical manner. After root-end resection, samples were divided randomly into 2 control (n = 5) and 2 experimental groups (n = 35). The specimens in Group 1 were pretreated using a Ca(OH)2 medicament, while the samples of Group 2 received no medicament. One week later, a 5 mm apical plug of MTA was applied into the canals. The remaining portions of the canals were obturated with gutta percha. Group 1 had a significantly higher frequency of apical leakage than Group 2 (P < 0.05).
本研究旨在探讨根管内预先放置氢氧化钙（Ca(OH)₂）如何影响模拟开放根尖中三氧化矿物凝聚体（MTA）充填体的封闭能力。对上颌中切牙以相同方式进行清理和预备。在进行根尖切除术之后，样本被随机分为2个对照组（n = 5）和2个试验组（n = 35）。第1组的标本使用Ca(OH)₂药物进行预处理，而第2组的样本未使用药物。1周后，将5 mm根尖段的MTA充填至根管内。根管的其余部分用牙胶充填。第1组的根尖微渗漏发生率显著高于第2组（P < 0.05）。
