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Effect of chemomechanical caries removal on bonding of resin‐modified glass ionomer cement adhesives to caries‐affected dentine
Author(s) -
Hamama HHH,
Yiu CKY,
Burrow MF
Publication year - 2015
Publication title -
australian dental journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.701
H-Index - 71
eISSN - 1834-7819
pISSN - 0045-0421
DOI - 10.1111/adj.12318
Subject(s) - glass ionomer cement , polyacrylic acid , adhesive , molar , chemistry , bond strength , dentistry , phosphoric acid , adhesion , smear layer , dentin , materials science , composite material , layer (electronics) , polymer , medicine , organic chemistry
Background This study evaluated the effect of: (1) chemomechanical caries removal ( CMCR ); (2) dentine surface treatments and (3) dentine substrates on adhesion of resin‐modified glass ionomer cement ( RMGIC ) adhesives. Methods One hundred and twenty permanent molars exhibiting moderate cavitation on the occlusal surface into dentine were used. Seventy‐five carious molars were used for bond strength testing; the remaining 45 for micromorphological evaluation of the bonded interface. Caries was excavated with Na OC l‐based CMCR (Carisolv), enzyme‐based CMCR (Papacarie), or conventional rotary caries removal methods. Dentine surface treatment was performed using 37% phosphoric acid, 25–30% PAA or 20% PAA + 3% AlCl 3 . Results Three‐way ANOVA revealed that all three factors ‘caries removal methods’, ‘dentine surface treatments’ and ‘dentine substrates’ did not significantly affect bond strength (p > 0.05). Scanning electron microscopy micrographs showed that the acid‐base resistant layer was thicker in caries‐affected dentine compared to sound dentine. Conclusions Na OC l‐ and enzyme‐based CMCR methods have no adverse effect on adhesion of RMGIC adhesives to sound and caries‐affected dentine. Dentine surface treatment with 37% phosphoric acid for 5 s has no negative effect on bonding of RMGIC adhesives to dentine compared with using polyacrylic acid for 10 s. RMGIC adhesives bonded well to both sound and caries‐affected dentine.