Effect of pretreatment with mildly acidic hypochlorous acid on adhesion to caries-affected dentin using a self-etch adhesive.
Caries-affected dentin is covered with a thicker and organically enriched smear layer than normal dentin. This may affect the demineralization ability and the infiltration of self-etch adhesives, thus reducing the efficacy of bonding to caries-affected dentin. This study evaluated the adhesion of a two-step self-etching adhesive to normal and caries-affected dentin after pretreatment with mildly acidic hypochlorous acid (HOCl) solutions. We used a microtensile bond strength (μTBS) test to compare the μTBS of Clearfil SE Bond to either caries-affected dentin or to normal dentin, after pretreatment for 5 s with one of three solutions (806 mM NaOCl, or 0.95 or 1.91 mM HOCl). The μTBS of the self-etch adhesive was significantly lower to caries-affected dentin than to normal dentin. Pretreatment with 0.95 mM HOCl improved the μTBS of the self-etch adhesive to caries-affected dentin, but there was no significant difference compared with normal dentin. On the other hand, pretreatment with 806 mM NaOCl or 1.91 mM HOCl did not demonstrate a significant improvement in the μTBS to caries-affected dentin. None of the pretreatments demonstrated a negative effect on adhesion to normal dentin.
Department of Restorative Sciences, Graduate School, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan. korn_ope@hotmail.com
Sitthikorn
S
Kunawarote
Masatoshi
M
Nakajima
Richard M
RM
Foxton
Junji
J
Tagami
D000134:Acid Etching, Dental / Q000379:methods*; D000704:Analysis of Variance; D001840:Dental Bonding; D003731:Dental Caries / Q000473:pathology*; D003799:Dental Stress Analysis; D003804:Dentin / Q000187:drug effects / Q000473:pathology*; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D006801:Humans; D006997:Hypochlorous Acid / Q000494:pharmacology; D008422:Materials Testing; D008963:Molar; D019279:Resin Cements / Q000737:chemistry*; D016369:Smear Layer; D012973:Sodium Hypochlorite / Q000494:pharmacology; D013718:Tensile Strength
C438313:Clearfil SE Bond; D017220:Dentin-Bonding Agents; D019279:Resin Cements; D006997:Hypochlorous Acid; D012973:Sodium Hypochlorite