Effect of resin cement pre-heating on the push-out bond strength of fiber post to root canal dentin

Journal of Dental Research, Dental Clinics, Dental Prospects

Ahmad Pirzadeh Ashraf²  Fatemeh Pournaghi Azar²  Ahmad Noorolouni¹  Jafar Sajjadi Oskoee²  Parnian Alizadeh Oskoee³ 

[1] Post graduate student, Department of Endodontics;Assistant Professor;associate professor

关键词: Push-out bond strength;    fiber post;    resin cement;    pre-warming;    laboratory research;   

DOI  :  

学科分类：农业科学（综合）

来源: Tabriz University of Medical Sciences * Faculty of Dentistry

【 摘 要 】

Background and aims. Various factors influence the interfacial bond between the fiber posts and root canal dentin. The aim of the present study was to evaluate the effect of pre-warming of resin cement on the push-out bond strength of fiber posts to various segments of root canal dentin.Materials and methods. In this in vitro study, 40 single-rooted human premolars were decoronated and underwent root canal treatment along with post space preparation. The samples were randomly divided into two groups: In group 1, Panavia F 2.0 cement was used at room temperature; in group 2, the same cement was warmed to 55‒60°C before mixing. After fiber posts were placed and cemented in the root canals, 3 dentin/post sections (coronal, middle and apical) with a thickness of 3 mm were prepared. A universal testing machine was used to measure push-out bond strength in MPa. Data was analyzed using two-factor ANOVA and a post hoc Tukey test at α=0.05.Results. The mean value of push-out bond strength was high at room temperature, and the differencesin the means of push-out bond strength values between the resin cement temperatures and between different root segments in each temperature were significant (P<0.05).Conclusion. Pre-warming of Panavia F 2.0 resin cement up to 55‒60°C reduced push-out bond strength to root canal dentin. In addition, in each temperature group bond strengths decreased from coronal to apical segments.

【 授权许可】

Unknown