Restorative and Prosthetic Dental Sciences, College of Dentistry, King Saud bin Abdulaziz University for Health Sciences, National Guard Health Affairs, P.O. Box 22490, 11426, Riyadh, Kingdom of Saudi Arabia.
King Abdullah International Medical Research Centre, National Guard Health Affairs, Riyadh, Kingdom of Saudi Arabia.
Sci Rep. 2023 Jun 8;13(1):9357. doi: 10.1038/s41598-023-36608-0.
This study investigated retreatment of oval canals filled with gutta-percha and different sealers using WaveOne Gold (WOG). Single oval canals were prepared to size 30, 0.04 and obturated with gutta percha and AH Plus (AHP) or TotalFill bioceramic (TFBC) sealer. After 6-month incubation, the canals were retreated with WOG Primary (25, 0.07) under simulated body temperature, and the developed load and torque were simultaneously measured. The time and regaining the apical patency were checked. Micro-computed tomography scanning was performed to calculate the remaining obturating materials. An independent t-test and chi-square test were performed at a 95% confidence level. A shorter retreatment time was needed in TFBC than in AHP (P = 0.003). However, a higher maximum apical load was reported with AHP (P = 0.000). Meanwhile, comparable maximum coronal load and maximum torque values were observed. Apical patency was regained in all TFBC roots and only 75% of the AHP samples (P = 0.217). The remaining obturating materials were comparable in TFBC (13.02 ± 8.12%) and AHP (10.11 ± 8.46%) (P = 0.398). WOG was able to remove 89.89% and 86.98% of obturating materials in TFBC and AHP, respectively. The TFBC presented lower apical loads and faster retreatment compared to AHP.
本研究探讨了使用 WaveOne Gold（WOG）对填充有牙胶和不同密封剂的椭圆形根管进行再治疗。将单个椭圆形根管预备至 30 号、0.04 规格，并分别用牙胶和 AH Plus（AHP）或 TotalFill 生物陶瓷（TFBC）密封剂进行填充。经过 6 个月的孵育，在模拟体温下，用 WOG Primary（25，0.07）对根管进行再治疗，并同时测量所产生的负载和扭矩。检查再治疗时间和重新获得根尖通畅度的情况。使用微计算机断层扫描来计算剩余的封闭材料。在 95%置信水平下进行独立 t 检验和卡方检验。TFBC 所需的再治疗时间比 AHP 短（P=0.003）。然而，AHP 报道的最大根尖负载更高（P=0.000）。同时，观察到可比的最大冠向负载和最大扭矩值。所有 TFBC 根都重新获得了根尖通畅度，而只有 75%的 AHP 样本（P=0.217）。TFBC （13.02±8.12%）和 AHP （10.11±8.46%）中的剩余封闭材料相似（P=0.398）。WOG 能够分别去除 TFBC 和 AHP 中 89.89%和 86.98%的封闭材料。与 AHP 相比，TFBC 呈现出较低的根尖负载和更快的再治疗速度。
