Ozasir Tufan, Ozasir Birgul, Aribal Nagihan, Yuzer Derin Bugu, Kandemir Baris, Gulsahi Kamran
Department of Endodontics, Faculty of Dentistry, Baskent University, Ankara, Turkey.
J Dent Sci. 2025 Jul;20(3):1532-1538. doi: 10.1016/j.jds.2024.12.019. Epub 2024 Dec 27.
BACKGROUND/PURPOSE: Treatment of external root resorption is performed by root canal treatment and repair of the resorptive area with biocompatible materials. Our study aimed to compare the fracture strengths of teeth with simulated external resorption repaired with BioMTA or Biodentine.
Sixty extracted human maxillary incisors were used in the study. The root canals were instrumented with Ni-Ti rotary instruments and obturated with single cone technique using corresponding gutta-percha cone and root canal sealer. The teeth were embedded in acrylic blocks. Fifteen of them served as negative control group. Simulated external resorption cavities were opened with burs on the approximal surfaces of the remaining teeth. Fifteen of them were assigned randomly as positive control group. The remaining teeth were randomly divided into two groups, the cavities were filled with BioMTA in one group and with Biodentine in the other group and then subjected to fracture strength test. The force at which fracture occurred was evaluated by analysis of variance at 0.05 significance level.
Biodentine showed significantly higher fracture strength than BioMTA. There was no difference between the negative control group and the Biodentine and BioMTA group. The positive control group showed significantly lower values than the other groups.
Both Biodentine and BioMTA may be used to repair external root resorption, while Biodentine is more durable.
背景/目的：外吸收性牙根的治疗是通过根管治疗并用生物相容性材料修复吸收区域来进行的。我们的研究旨在比较用BioMTA或Biodentine修复模拟外吸收的牙齿的抗折强度。
本研究使用了60颗拔除的人上颌切牙。用镍钛旋转器械对根管进行预备，并用相应的牙胶尖和根管封闭剂采用单尖法进行充填。将牙齿嵌入丙烯酸块中。其中15颗作为阴性对照组。用裂钻在其余牙齿的邻面制备模拟外吸收洞。其中15颗随机分配为阳性对照组。其余牙齿随机分为两组，一组用BioMTA充填洞，另一组用Biodentine充填，然后进行抗折强度测试。通过在0.05显著性水平下的方差分析评估骨折发生时的力。
Biodentine的抗折强度显著高于BioMTA。阴性对照组与Biodentine和BioMTA组之间没有差异。阳性对照组的值显著低于其他组。
Biodentine和BioMTA均可用于修复外吸收性牙根，而Biodentine更耐用。
