Department of Endodontics, Faculty of Dentistry, St Joseph University, Beirut, Lebanon.
Biomedical Engineering Department, Maroun Semaan Faculty of Engineering and Architecture, American University of Beirut, Lebanon.
J Contemp Dent Pract. 2022 Feb 1;23(2):143-148.
The aim of the study was to compare the fracture resistance of the single-cone technique with the warm vertical compaction technique (WVCT) in mandibular incisors using Bio-C sealer®, by applying a compressive force using a universal testing machine (UTM) (Instron 5943; Instron, Norwood, Massachusetts, USA).
Twenty-two mandibular incisors were selected and divided into two groups after applying the same shaping protocol. To assess the influence of the wave vertical compaction technique on the fracture resistance, the first group was obturated by a single-cone obturation technique (SCOT) ( = 12), and the second group was obturated with a WVCT ( = 10). Bio-C sealer® (Angelus, Hague Netherlands) was used in the two obturation techniques. Wax-coated roots were put in an acrylic mold and loaded to compressive strength fracture in a mechanical material testing machine (UTM) (Instron 5943; Instron, Norwood, Massachusetts, USA), with Bluehill 3 software (version 3.15.1343) recording the maximum load at fracture. Fracture loads were compared statistically, and data were examined with the Mann-Whitney test with a level of significance set at ≤0.05.
No statistically significant difference was registered between the SCOT (264.97 ± 83.975 N) and WVCT (313.35 ± 89.149 N) concerning the endodontically treated mandibular incisors' fracture resistance ( = 0.159).
Warm vertical compaction technique (WVCT) did not affect the fracture resistance of endodontically treated mandibular incisors when compared to SCOT canal preparation.
General practitioners and endodontists face challenges during root canal treatment such as cracks and root fractures. This article aims to guide experts in choosing between the single-cone and the continuous WVCT aiming for higher long-term quality of root canal filling.
本研究旨在通过使用万能试验机（Instron 5943；Instron，马萨诸塞州诺伍德，美国）施加压缩力，比较使用 Bio-C 密封剂®的单根管技术与温热垂直加压技术（WVCT）在下颌切牙中的抗折能力。
在应用相同的成型方案后，选择 22 个下颌切牙并将其分为两组。为了评估 WVCT 对抗折能力的影响，第一组采用单根管充填技术（SCOT）（n=12）进行根管充填，第二组采用 WVCT（n=10）进行根管充填。两种根管充填技术均使用 Bio-C 密封剂®（Angelus，荷兰海牙）。蜡涂根放入丙烯酸模具中，并在机械材料试验机（UTM）（Instron 5943；Instron，马萨诸塞州诺伍德，美国）上加载至压缩强度断裂，Bluehill 3 软件（版本 3.15.1343）记录断裂时的最大载荷。使用 Mann-Whitney 检验对断裂载荷进行统计学比较，检验水平设定为≤0.05。
在比较下颌切牙根管治疗后的抗折能力时，SCOT（264.97±83.975 N）和 WVCT（313.35±89.149 N）之间没有统计学上的显著差异（=0.159）。
与 SCOT 根管预备相比，温热垂直加压技术（WVCT）不会影响根管治疗后的下颌切牙的抗折能力。
全科医生和牙髓病学家在根管治疗过程中会面临一些挑战，例如裂纹和根折。本文旨在指导专家在选择单根管和连续 WVCT 时，旨在提高根管填充的长期质量。
