Department of Conservative Dentistry and Endodontics, Aditya Dental College, Beed, Maharashtra, India.
Department of Conservative Dentistry and Endodontics, D.Y. Patil Dental College, Navi Mumbai, Maharashtra, India.
Indian J Dent Res. 2023 Jan-Mar;34(1):75-79. doi: 10.4103/ijdr.ijdr_763_22.
The aim of this study was to compare the fracture resistance of simulated immature teeth using four different apical plug materials, i.e. Pro- Root MTA, Neo- MTA Plus, Biodentine, and Bioactive Glass.
80 extracted human maxillary anterior teeth were divided into 4 groups for this study. They were prepared using Peeso reamers to simulate immature teeth and to mimic Cvek's stage 3 of root development. A 5 mm apical barrier was placed using different materials. The remaining canal was obturated using gutta-percha and AH plus sealer. The final samples were stored at 37°C and 100% humidity for 4 weeks. Fracture resistance of the teeth was measured in Newtons using a universal testing machine. The comparison of fracture resistance between the four groups was done using Kruskal Walis ANOVA followed by post hoc Mann Whitney U test for pairwise comparison.
Biodentine group showed the highest fracture resistance as compared to the other three groups and the difference was highly significant (P < 0.001).
Biodentine can be advocated over MTA as an effective material for the management of teeth with wide open apex. Bioactive glass also has shown promising results in increasing the fracture resistance of simulated immature teeth.
本研究的目的是比较四种不同的根尖封闭材料（Pro-Root MTA、Neo-MTA Plus、Biodentine 和 Bioactive Glass）对模拟未成熟牙的抗折能力。
本研究共纳入 80 颗上颌前磨牙，将其分为 4 组。使用 Peeso 扩孔钻制备模拟未成熟牙，模拟 Cvek 第 3 期根尖发育。使用不同的材料放置 5mm 的根尖屏障。剩余的根管用牙胶和 AH plus 密封剂填充。最终样本在 37°C 和 100%湿度下储存 4 周。使用万能试验机以牛顿为单位测量牙齿的抗折能力。采用 Kruskal-Wallis ANOVA 检验比较四组之间的抗折能力，然后采用曼-惠特尼 U 检验进行两两比较。
与其他三组相比，Biodentine 组的抗折能力最高，差异具有统计学意义（P < 0.001）。
Biodentine 可作为一种有效的根尖敞开牙的处理材料，优于 MTA。Bioactive Glass 也显示出增加模拟未成熟牙抗折能力的有前途的结果。
