Abstract
The aim of this study was to determine whether the residual presence of eugenol in coronal dentin may compromise the bond strength of resin-based restorative materials. A search was performed on MEDLINE/Pubmed, Scopus, and by hand search for relevant papers. No restriction was applied for language and publication date. The studies selected for analysis tested specimens with reduced size (micro-shear bond strength (µSBS) and micro-tensile bond strength (µTBS)) of adhesive systems and resin-based restorative materials applied to coronary dentin “contaminated” with eugenol-based materials. The search provided 335 articles, but only 10 studies met the inclusion criteria. The pooled global analysis showed a significant influence of eugenol, as it negatively influenced the bond strength of resin-based restorations (5.79 (3.31–8.28) MPa, p < 0.00001). The subgroup analyses for conventional etch-and-rinse (p = 0.003) and self-etch (p < 0.0004) adhesive systems, as well as for µSBS (p = 0.01) and µTBS (p < 0.0001), showed a negative influence of eugenol on the bond strength. Data were statistically heterogeneous. However, it was possible to observe that eugenol could negatively affect the bonding of resin-based restorative materials to dentin. Further evidence is necessary in order to acquire more accurate information about this issue and confirm that the residual presence of eugenol in dentin compromises the bond strength of resin-based materials.
Highlights
Eugenol, in combination with zinc oxide (ZOE), is one of the most common materials used as a root canal sealer in endodontics [1,2,3,4,5], as well as a pulp sedative in cases of pulpotomies [6,7,8,9] and an impression material for edentulous patients [10,11,12,13]
Inclusion criteria comprised the presence of a comparison of bond strength values with and without eugenol, with mean and standard deviation values presented in megapascal (MPa)
Several studies have suggested that the effect of eugenol on the bond strength depended on the adhesive system employed [17]
Summary
In combination with zinc oxide (ZOE), is one of the most common materials used as a root canal sealer in endodontics [1,2,3,4,5], as well as a pulp sedative in cases of pulpotomies [6,7,8,9] and an impression material for edentulous patients [10,11,12,13]. ZOE cements are frequently applied as temporary materials during indirect restorations [14]. It is known that ZOE cements can perform as anodynes for pulpal pain [15], especially in those patients presenting dentin hypersensitivity after tooth preparation and temporary restorations [16].
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