Guedes Orlando A, Chaves Gustavo S, Alencar Ana H G, Borges Alvaro H, Estrela Cyntia R A, Soares Carlos J, Estrela Carlos
Endodontic Division, School of Dentistry, University of Cuiabá
J Oral Sci. 2014 Jun;56(2):105-12. doi: 10.2334/josnusd.56.105.
The purpose of this study was to investigate the influence of gutta-percha solvents on the bond strength of fiberglass post to root canal dentin. Forty bovine incisors were decoronated, prepared, filled, and randomly distributed into four groups (n = 10) according to the gutta-percha solvent used: control, xylene, eucalyptol and orange oil. After root canal treatment, the posts were cemented into the prepared root canals using a resin-based cement. A micro push-out test was executed, and the patterns of failure were assessed with microscopy. The data were analyzed using two-way ANOVA followed by Tukey's test. The control group exhibited greater bond strength compared to the eucalyptol group in the cervical and middle thirds of the root (P < 0.05); however, it did not differ significantly from the xylene and orange oil groups (P > 0.05). No difference was observed in the values of the xylene, orange oil, and eucalyptol groups (P > 0.05). The cervical third had higher values than the apical third for all tested solvents (P < 0.05). Adhesive failure between resin cement and dentin was the most frequent type of failure. The use of xylene and orange oil as gutta-percha solvents did not influence the bond strength of fiberglass posts to root canal dentin.
本研究的目的是调查牙胶溶剂对玻璃纤维桩与根管牙本质粘结强度的影响。将40颗牛切牙去冠、预备、充填，并根据所使用的牙胶溶剂随机分为四组（n = 10）：对照组、二甲苯组、桉叶油组和橙油组。根管治疗后，使用树脂类粘结剂将桩粘结到预备好的根管中。进行微推出试验，并通过显微镜评估失败模式。数据采用双向方差分析，随后进行Tukey检验。在牙根的颈部和中部三分之一处，对照组的粘结强度高于桉叶油组（P < 0.05）；然而，与二甲苯组和橙油组相比，差异无统计学意义（P > 0.05）。二甲苯组、橙油组和桉叶油组的值之间无差异（P > 0.05）。对于所有测试溶剂，颈部三分之一处的值高于根尖三分之一处（P < 0.05）。树脂粘结剂与牙本质之间的粘结失败是最常见的失败类型。使用二甲苯和橙油作为牙胶溶剂不会影响玻璃纤维桩与根管牙本质的粘结强度。
