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Influence of resin cement and post configuration on bond strength to root dentine
Author(s) -
Soares C. J.,
Pereira J. C.,
Valdivia A. D. C. M.,
Novais V. R.,
Meneses M. S.
Publication year - 2012
Publication title -
international endodontic journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.988
H-Index - 119
eISSN - 1365-2591
pISSN - 0143-2885
DOI - 10.1111/j.1365-2591.2011.01953.x
Subject(s) - materials science , bond strength , cement , composite material , dentistry , dental cement , medicine , adhesive , layer (electronics)
Soares CJ, Pereira JC, Valdivia ADCM, Novais VR, Meneses MS. Influence of resin cement and post configuration on bond strength to root dentine. International Endodontic Journal , 45 , 136–145, 2012. Abstract Aim To evaluate the effect of luting agent and fibreglass post design on bond strength to root dentine at different depths within the canal. Methodology Ninety single‐rooted teeth were root filled and prepared to receive either a parallel‐sided and serrated fibreglass post (Reforpost no. 2) or a tapered and smooth fibreglass post (Exato Cônico). The posts were cemented with the following resin cements: dual‐cured resin cement (Rely X ARC), two self‐adhesive resin cements (Rely X Unicem and MaxCem) and a self‐cured resin cement (Cement‐Post). The roots were cross‐sectioned to obtain two 1‐mm‐thick discs for each cervical, middle and apical third of the prepared root portion. The posts were submitted to a micropush‐out test at a speed of 0.5 mm min −1 , and the bond strength values (MPa) were submitted to anova in a split‐plot arrangement and Tukey’s test ( P < 0.05). Results The RelyX Unicem demonstrated significantly higher bond strength values ( P < 0.001) along the root dentine. The RelyX ARC and Cement‐Post had similar bond strength values in the cervical third; however, the bond strength decreased significantly ( P < 0.001) in an apical direction for the RelyX ARC. Significantly lower bond strength values ( P < 0.001), irrespective of canal region, were found for MaxCem cement. The bond strength was similar for both post configurations irrespective of the resin cement and canal region. Conclusions The retention of glass fibre posts remained unaffected by surface roughness but was influenced by resin cement type. The self‐adhesive cement RelyX Unicem yielded a significantly greater ( P < 0.001) bond strength value when cementing the fibreglass posts.