Department of Conservative Dentistry, Faculty of Dentistry, Jordan University of Science and Technology, Irbid, Jordan.
Clin Oral Investig. 2023 Dec;27(12):7359-7367. doi: 10.1007/s00784-023-05326-2. Epub 2023 Nov 3.
This study evaluated the effect of sealer type with various obturation techniques on the fracture resistance of root filled teeth.
Eighty mandibular premolars were collected, and root canals of 70 of them were prepared by Mtwo system up to 40/04. Thirty teeth were obturated using TotalFill BC sealer, and 30 using AH Plus sealer, with one of the obturation techniques (N = 10), namely cold lateral compaction (CLC), warm vertical compaction (WVC), and single cone (SC). Ten teeth were left without obturation as a positive control, and the other 10 teeth were not prepared serving as a negative control. Teeth were stored for 3 weeks, and the crowns were separated and the roots were subjected to fracture test using a universal testing machine.
Data was analyzed by ANOVA followed by Tukey's test. Fracture resistance of the TotalFill groups was significantly higher than the AH Plus groups in each obturation technique, and SC had the highest fracture resistance regardless of sealer used (P < 0.05). Obturation of the root canal by TotaFill BC sealer increased the calcium/phosphorous ratio in the dentin of the root.
Obturation with TotalFill BC sealer improved the fracture resistance of the roots more than AH Plus sealer, and obturation with SC resulted in higher fracture resistance than CLC and WVC.
Obturation of the root canal with Bioceramic sealer with single cone obturation technique could reduce the incidence of vertical root fracture.
本研究评估了不同的根管封闭技术与不同封闭剂类型对根管填充牙抗折能力的影响。
收集了 80 颗下颌前磨牙，其中 70 颗采用 Mtwo 系统预备至 40/04。30 颗牙齿用 TotalFill BC 封闭剂，30 颗牙齿用 AH Plus 封闭剂，每种封闭剂各有 10 颗牙齿采用一种填充技术（冷侧方加压充填法（CLC）、热垂直加压充填法（WVC）和单尖法（SC））。10 颗牙齿不做根管填充作为阳性对照，10 颗牙齿不做根管预备作为阴性对照。牙齿保存 3 周后，分离牙冠，使用万能试验机对牙根进行断裂测试。
采用方差分析（ANOVA）和 Tukey 检验进行数据分析。在每种根管封闭技术中，TotalFill 组的抗折能力明显高于 AH Plus 组，且无论使用哪种封闭剂，SC 的抗折能力均最高（P<0.05）。用 TotalFill BC 封闭剂填充根管增加了牙根牙本质的钙/磷比值。
与 AH Plus 封闭剂相比，用 TotalFill BC 封闭剂填充根管可提高牙根的抗折能力，且与 CLC 和 WVC 相比，SC 技术的根管封闭可产生更高的抗折能力。
用单尖法对根管进行 Bioceramic 封闭剂填充可降低垂直根裂的发生率。
