Influence of temporary filling materials on effect of dentin‐bonding agents

Abstract

– Dentin cavities, prepared in extracted human teeth, were filled with a dry mixture of zinc oxide‐eugenol (ZOE) or a commercial temporary filling cement without eugenol (Cavit). The ZOE was removed 3 h later while the Cavit was removed after 7 days. The cavity wall and the surrounding dentin were then treated with a dentin‐bonding agent before application of a restorative resin. The width and the extent of the marginal contraction gap were measured, using a light microscope, approximately 0.1 mm below the original free surface of the filling. It was found that the contraction gap was markedly increased in cavities previously filled with ZOE while the non‐eugenol cement had no influence on the effect of the two dentin‐bonding agents tested. The short‐term test applied in the present study indicates that ZOE should not be used in cavities later to be restored with dentin‐bonding agent and resin.

Influence of Previous Provisional Cementation on the Bond Strength Between Two Definitive Resin-based Luting and Dentin Bonding Agents and Human Dentin

“…In previous studies, it has been stated that acid etching and rinsing procedures are known to be effective in removing contaminants from the dentinal surface (Hansen & Asmussen; Xie & others). 24,35 However, for this study, PLA treatment prior to application of the bonding agents significantly decreased the bond strength values of the resin-based luting systems studied, regardless of the PLA composition (p<0.05).…”

“…18 The negative effects of eugenol-containing PLAs on the retention of a restoration luted with resin-based luting agents (Millstein & Nathanson; Paul & Scharer; Bachmann & others; al-Wazzan, al-Harbi & Hammad) [19][20][21][22] include softening of the provisional resin surface (Rosenstiel & Gegauff) 23 and deterioration of the marginal adaptation (Hansen & Asmussen). 24 However, according to some authors, eugenol-containing PLAs did not have a negative effect on resin-based restoratives ( [24][25][26][27][28][29] In some PLA formulations, eugenol is replaced by carboxylic acids (Anusavice). 30 However, a considerable reduction in bond strength after adhesive cementation has been identified with eugenol-free formulations (Watanabe & others; Paul & Scharer; Watanabe & others; Aykent & others).…”

Influence of eugenol-based materials and cleaning procedures previously to resin composite restoration on microleakage after 1-year storage

“…Eugenol-containing materials have several advantages as bases for restorations; however, they are believed to interfere with polymerization during the curing of composite restorations [12,23]. The hydroxyl group of the eugenol molecule tends to protonize the free radicals formed during the polymerization of resin-based materials, thereby blocking their reactivity and reducing the degree of conversion of these materials [3,18].…”

“…Resin-luting agents have had a profound effect in the way endodontically treated teeth are restored [32]. Because these surfaces may be contaminated with a eugenol-containing endodontic sealer during root canal therapy, there is concern that such contamination may interfere with the polymerization of the resin [23] thereby weakening the adhesion of the core material to the dentin [32].…”

Effect of mechanical and air-particle cleansing protocols of provisional cement on immediate dentin sealing layer and subsequent adhesion of resin composite cement

“…Immediate dentin sealing (IDS) or dual bonding technique has been suggested as an alternative to delayed dentin sealing in order to overcome hypersensitivity and avoid contamination of dentin from impression material and provisional cement [14][15][16][17] and at the same time reduce marginal leakage [18][19][20][21][22][23][24][25].…”