Effect of retreatment on the push-out bond strength of MTA-based and epoxy resin-based endodontic sealers

Journal of Dental Research, Dental Clinics, Dental Prospects

卷:11

Shahriar Shahi¹  Maryam Janani²  Hamidreza Yavari²  Mohammad Samiei²  Saeedeh Galledar³ 

[1] Dental and Periodontal Research Center, Tabriz University of Medical Sciences, Tabriz, Iran;

[2] Department of Endodontics, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran;

[3] Department of Endodontics, Faculty of Dentistry,Ardabil University of Medical Sciences, Ardabil, Iran;

关键词: MTA Fillapex;    push-out bond strength;    sealer;    retreatment;   

DOI  :  10.15171/joddd.2017.008

来源: DOAJ

【 摘 要 】

Background. Further studies on the adhesion properties of MTA-based materials seem necessary due to their growing use in endodontic treatment. This research aimed to assess the effect of retreatment on the bond strength of MTA-based (MTA Fillapex) and epoxy resin-based (AH Plus) sealers. Methods. ProTaper rotary files were applied to prepare the root canals of 80 human mandibular premolars. Then, the roots were randomly divided intotwo groups of A (n=40) and B (n=40), which were obturated with gutta-percha and MTA Filla-pex and AH Plus sealer, respectively. In both groups, the teeth were randomly subdivided into 2 subgroups. No retreatment was carried out in subgroups A1 and B1, while subgroups A2 and B2 were retreated with rotary files and a solvent. Then, a push-out test was performed on four 2-mm slices of each tooth at a distance of 2 mm from the coronal surface after two weeks of incubation. Data were analyzed with two-way ANOVA and statistical significance was set at P<0.05. Results. Regardless of the procedure followed (P<0.001), significant differences were detected in the mean bond strength values between the two sealers. Irrespective of the sealer type (P=0.3), no significant differences were revealed by comparing the mean bond strength values of the study subgroups. Furthermore, no statistically significant interaction (P=0.5) was found between the treatment and sealer types. Conclusion. AH Plus sealer exhibited a higher bond strength compared to MTA Fillapex. Retreatment using rotary files and chloroform had no statistically significant effect on the bond strength of sealers evaluated in this study.

【 授权许可】

Unknown