The mussel-inspired polydopamine surface treatment influences bond strength of glass fiber posts to radicular dentin

The aim of this study was to compare the efficacy of silane and a novel bioinspired polydopamine functionalization on the adhesion strength of glass fiber posts cemented to root dentin. Sixty-four surface treated posts [polydopamine (group 1 = 32) or silane (group 2 = 32)] were cemented in root cana...

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Bibliographic Details
Published in:International journal of adhesion and adhesives 2021-03, Vol.105, p.102791, Article 102791
Main Authors: Çoban Kanyılmaz, Ata Nisa, Belli, Sema, Neelakantan, Prasanna
Format: Article
Language:English
Subjects:
Adhesive strength
Adhesives
Bond strength
Bonding strength
Cement
Cementing
Cements
Dentin
Failure modes
Fiber post
Glass fibers
Polydopamine
Resin cement
Resins
Silane
Statistical methods
Strength testing
Subgroups
Surface treatment
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Summary:The aim of this study was to compare the efficacy of silane and a novel bioinspired polydopamine functionalization on the adhesion strength of glass fiber posts cemented to root dentin. Sixty-four surface treated posts [polydopamine (group 1 = 32) or silane (group 2 = 32)] were cemented in root canals of 64 extracted and decoronated mandibular premolars by using 3 commercial brands of self-adhesive resin cements (subgroups A, B and C) or a total-etch resin cement (subgroup D). The samples were subjected to push-out bond strength testing at 24 h and at 6 months after storage in water. Each sample was subdivided into six slices (three slices of the coronal and three slices of the apical) to determine the push-out bond strength in the coronal and apical third. The mean bonding strength value of the 3 slices both for the coronal and apical third was calculated as megapascals (MPa) and the data were statistically analyzed using post hoc Tukey HSD and Student t tests using four-way ANOVA (P = 0.05). Failure modes were investigated using scanning electron microscopy (SEM). The number of adhesive failures at the dentin-cement interface dropped when polydopamine was used (12–33%). Failure between the post and cement interface also dropped (4–13%) in all the resin cement groups, except the Subgroup C (17%). Polydopamine treatment significantly increased the adhesion strength for all cements compared to silanization at 24 h (P 
ISSN:0143-7496
1879-0127
DOI:10.1016/j.ijadhadh.2020.102791