Kahyaie Aghdam Mina, Bahari Mahmoud, Mohammadi Narmin, Savadi Oskoee Siavash, Ebrahimi Chaharom Mohammad Esmaeel
Department of Operative Dentistry, Dental Faculty, Tabriz University of Medical Sciences, Tabriz, Iran.
Dental and Periodontal Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.
Front Dent. 2024 Jul 10;21:24. doi: 10.18502/fid.v21i24.16115. eCollection 2024.
This study aimed to investigate the effect of different reinforcement techniques on the push-out bond strength of fiber posts to over-flared root canals. Forty-eight extracted human single-canal premolars were endodontically treated, over-flared, and randomly divided into four groups (N=12) including SARC: luting with self-adhesive resin cement, DCC: luting with dual-cure core build-up resin composite, CRR: relining root canal walls with bulk-fill resin composite, and DAP: relining fiber post with bulk-fill resin composite. After 24 hours, the roots were sectioned to obtain three cervical, middle, and apical 3mm slices. The push-out test was performed and failure pattern was examined. Kruskal-Wallis and post-hoc Dunn-Bonferroni tests were used for statistical analysis (P<0.05). In all three regions, the lowest and highest bond strength was found in the SARC and DAP groups, respectively. In the middle region, there was a statistically significant difference between the bond strength of the SARC group and that of the DCC (P=0.044), CRR (P=0.021), and DAP (P<0.001) groups. There was no significant difference in the apical region. The lowest bond strength was observed in the apical region, and the highest was related to the cervical region. Adhesive failure was the most common failure pattern in all groups. Based on our results DCC, CRR and DAP methods increased bond strength in the middle and cervical sections of over-flared root regions. Considering that DCC is the easiest and most practical method, we propose that CRR and DAP can be replaced with this method in clinical procedures.
本研究旨在探讨不同增强技术对纤维桩与过度扩宽根管的推出粘结强度的影响。选取48颗拔除的人单根管前磨牙，进行根管治疗、过度扩宽，然后随机分为四组（每组n = 12），包括SARC组：用自粘结树脂水门汀粘结；DCC组：用双固化核成型树脂复合材料粘结；CRR组：用大体积充填树脂复合材料衬里根管壁；DAP组：用大体积充填树脂复合材料衬里纤维桩。24小时后，将牙根切片，获得三个颈部、中部和根尖3mm的切片。进行推出试验并检查失败模式。采用Kruskal-Wallis检验和事后Dunn-Bonferroni检验进行统计分析（P<0.05）。在所有三个区域中，SARC组的粘结强度最低，DAP组的粘结强度最高。在中部区域，SARC组与DCC组（P = 0.044）、CRR组（P = 0.021）和DAP组（P<0.001）的粘结强度之间存在统计学显著差异。根尖区域无显著差异。根尖区域的粘结强度最低，颈部区域的粘结强度最高。粘结失败是所有组中最常见的失败模式。基于我们的结果，DCC、CRR和DAP方法增加了过度扩宽根管区域中部和颈部的粘结强度。考虑到DCC是最简单、最实用的方法，我们建议在临床操作中，CRR和DAP可以用这种方法替代。
