Yilmaz Zeliha, Küçükkaya Eren Selen, Uzunoğlu Emel, Görduysus Melahat, Görduysus Mehmet Ömer
Department of Endodontics, Faculty of Dentistry, Hacettepe University.
RAK College of Dental Science, RAK Medical and Health Science University.
Dent Mater J. 2017 Nov 29;36(6):809-815. doi: 10.4012/dmj.2016-412. Epub 2017 Aug 25.
The aims were to evaluate the effects of different additives on the adaptation of mineral trioxide aggregate (MTA) plugs before and after different backfilling techniques and analyze the interference of filling procedures on the fracture resistance of simulated immature teeth. The apical parts of 60 teeth were filled with MTA mixed with distilled water (DW), propylene glycol (PG) or calcium chloride (CaCl) and backfilled with cold lateral condensation (CLC) or warm vertical compaction (WVC). The specimens were subjected to adaptation analysis and fracture testing. CaCl addition resulted in poor marginal adaptation, while PG addition significantly decreased the fracture values (p<0.05). WVC technique negatively affected the marginal adaptation of MTA-CaCl plugs and decreased the fracture values of teeth with MTA-PG plugs (p<0.05). Mixing MTA with DW can be recommended as apical plug when the remaining root canal space is going to be filled with either CLC or WVC techniques.
本研究旨在评估不同添加剂对不同回填技术前后三氧化矿物凝聚体（MTA）充填体适应性的影响，并分析充填过程对模拟未成熟牙抗折性的干扰。60颗牙齿的根尖部分用与蒸馏水（DW）、丙二醇（PG）或氯化钙（CaCl）混合的MTA充填，并用冷侧向加压充填法（CLC）或热垂直加压充填法（WVC）进行回填。对标本进行适应性分析和抗折测试。添加CaCl导致边缘适应性差，而添加PG显著降低了抗折值（p<0.05）。WVC技术对MTA-CaCl充填体的边缘适应性有负面影响，并降低了MTA-PG充填体牙齿的抗折值（p<0.05）。当剩余根管空间采用CLC或WVC技术充填时，推荐将MTA与DW混合作为根尖充填材料。
