■这项研究旨在评估根管内部三种不同闭塞材料对牙本质的推出粘结强度(PBS),并确定破坏机制。
■该研究使用了30颗未受损的人类下颌前磨牙。将标本随机分为三组,每个使用不同的密封剂(n=10)。第1组使用AHPlus封口机,第2组使用GuttaFlow-2封口机,和第3组使用生物陶瓷密封剂(CeraSeal)。封闭程序是使用古塔胶单锥方法进行的。将样品分成多个部分,并使用万能试验机加载。PBS测试后,每个样本都接受了立体显微镜检查,并记录了具体的故障机制。
■AHPlus的平均PBS最大,其次是CeraSeal和Guttaflow-2.冠状和顶端水平之间存在显著差异。
■与其他密封剂相比,AHPlus表现出优于牙根牙本质的PBS质量。
UNASSIGNED: This research aimed to assess the push-out bond strength (PBS) to dentin of three distinct obturation materials inside the root canal and identify the failure mechanism.
UNASSIGNED: The research used 30 undamaged human mandibular premolars. The specimens were randomly assigned to three groups, each employing a different sealer (n = 10). Group 1 used AH Plus sealer, Group 2 used GuttaFlow-2 sealer, and Group 3 used bioceramic sealer (CeraSeal). The obturation procedure was performed utilizing the single-cone method with gutta-percha. The specimens were divided into sections and loaded using a universal testing machine. Following PBS testing, every sample underwent a stereomicroscope examination, and the specific failure mechanism was documented.
UNASSIGNED: The average PBS was greatest for AH Plus, followed by CeraSeal and Guttaflow-2. Notable disparities existed between the coronal and apical levels.
UNASSIGNED: AH Plus exhibited superior PBS qualities to root dentin compared to other sealers.