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KMID : 1034420190440040037
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Restorative Dentistry & Endodontics
2019 Volume.44 No. 4 p.37 ~ p.37
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The effect of individualization of fiberglass posts using bulk-fill resin-based composites on cementation: an in vitro study
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Lins Rodrigo Barros Esteves
Cordeiro Jairo Matozinho
Rangel Carolina Perez
Antunes Thiago Bessa Marconato
Martins Luis Roberto Marcondes
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Abstract
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Objectives: This study evaluated the bond strength of various fiberglass post cementation techniques using different resin-based composites.
Materials and Methods: The roots from a total of 100 bovine incisors were randomly assigned to 5 treatment groups: G1, post + Scotchbond Multi-Purpose (SBMP) + RelyX ARC luting agent; G2, relined post (Filtek Z250) + SBMP + RelyX ARC; G3, individualized post (Filtek Z250) + SBMP; G4, individualized post (Filtek Bulk-Fill) + SBMP; G5, individualized post (Filtek Bulk-Fill Flow) + SBMP. The samples were subjected to the push-out (n = 10) and pull-out (n = 10) bond strength tests. Data from the push-out bond strength test were analyzed using 2-way analysis of variance (ANOVA) with the Bonferroni post hoc test, and data from the pull-out bond strength test were analyzed using 1-way ANOVA.
Results: The data for push-out bond strength presented higher values for G2 and G5, mainly in the cervical and middle thirds, and the data from the apical third showed a lower mean push-out bond strength in all groups. No significant difference was noted for pull-out bond strength among all groups. The most frequent failure modes observed were adhesive failure between dentine and resin and mixed failure.
Conclusions: Fiberglass post cementation using restorative and flowable bulk-fill composites with the individualization technique may be a promising alternative to existing methods of post cementation.
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KEYWORD
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Cementation, Composite resins, Dentin, Root canal filling materials, Tooth root
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