Shieh Karissa, Yang Jack, Zhu Elsa Heng, Peters Ove Andreas, Hosseinpour Sepanta
School of Dentistry, The University of Queensland, Brisbane 4006, Australia.
Materials (Basel). 2023 Apr 23;16(9):3309. doi: 10.3390/ma16093309.
Once the chemo-mechanical preparation of root canals is finished, achieving a complete seal of the root canal system becomes crucial in determining the long-term success of endodontic treatment. The important goals of root canal obturation are to minimize leakage and achieve an adequate seal. Thus, a material that possesses satisfactory mechanical characteristics, is biocompatible, and has the ability to penetrate the dentine tubules adequately is needed.
This study aimed to compare the penetrability and bond strength between two calcium silicate-based sealers and an epoxy resin-based sealer, as well as examine the relationship between penetrability and bond strength for the different sealers.
Thirty-nine recently extracted single-rooted human premolar teeth were instrumented and divided evenly into three groups ( = 13), according to the sealer used for obturation: AH Plus Jet, EndoSequence, and AH Plus Bioceramic Sealer. Three teeth (30 slices) were randomly selected out of each for analysis using confocal laser scanning microscopy to assess penetrability. The remaining ten teeth (90 slices) in each group were subject to push-out tests using a universal testing machine. All teeth were sectioned into nine transverse slices of 0.9 mm thickness for their respective tests (apical, middle, coronal).
AH Plus Jet exhibited significantly lower penetrability and significantly higher bond strength compared to EndoSequence BC sealer ( = 0.002) and AH Plus Bioceramic Sealer ( = 0.006). There was no significant difference between EndoSequence BC sealer and AH Plus Bioceramic Sealer in terms of either penetrability or bond strength. No correlation was found between penetrability and bond strength.
Within the limitation of this study and regardless of the location in the canal, the bioceramic based root canal sealers appeared to perform better than the epoxy resin-based sealer in terms of dentinal penetration rate. Further studies are required to compare other biomechanical properties of bioceramic sealers including setting characteristics and bacterial leakage.
一旦根管的化学机械预备完成，实现根管系统的完全封闭对于确定牙髓治疗的长期成功至关重要。根管充填的重要目标是将渗漏降至最低并实现充分的封闭。因此，需要一种具有令人满意的机械特性、生物相容性且能够充分穿透牙本质小管的材料。
本研究旨在比较两种硅酸钙基封闭剂与一种环氧树脂基封闭剂之间的穿透性和粘结强度，并研究不同封闭剂的穿透性与粘结强度之间的关系。
39颗近期拔除的单根人前磨牙进行预备，并根据用于充填的封闭剂平均分为三组（每组n = 13）：AH Plus Jet、EndoSequence和AH Plus生物陶瓷封闭剂。每组随机选取三颗牙齿（30个切片），使用共聚焦激光扫描显微镜进行分析以评估穿透性。每组剩余的十颗牙齿（90个切片）使用万能试验机进行推出试验。所有牙齿均切成厚度为0.9毫米的九个横向切片进行各自的试验（根尖、中部、冠部）。
与EndoSequence BC封闭剂（P = 0.002）和AH Plus生物陶瓷封闭剂（P = 0.006）相比，AH Plus Jet的穿透性显著更低，粘结强度显著更高。EndoSequence BC封闭剂和AH Plus生物陶瓷封闭剂在穿透性或粘结强度方面均无显著差异。未发现穿透性与粘结强度之间存在相关性。
在本研究的局限性内，无论在根管中的位置如何，基于生物陶瓷的根管封闭剂在牙本质渗透速率方面似乎比基于环氧树脂的封闭剂表现更好。需要进一步研究比较生物陶瓷封闭剂的其他生物力学性能，包括凝固特性和细菌渗漏。
