Immediate bonding to bleached enamel.
This research sought to determine the shear bond strength, degree of resin infiltration and failure mode when organic solvent-based adhesives (acetone or ethanol) were used in immediate bonding to enamel bleached with 10% carbamide peroxide or 38% hydrogen peroxide systems. Seventy-two non-carious bovine incisors were randomly assigned to three groups of 24 specimens each-control group (deionized water), 38% hydrogen peroxide bleach group and 10% carbamide peroxide bleach group. Each group was further subdivided into two subgroups of 12 specimens each according to the adhesive system used to bond the resin composite to enamel surfaces. The two adhesive systems used were Single Bond, an ethanol-based adhesive, and One Step, an acetone-based adhesive. The shear bond strengths of 38% hydrogen peroxide and 10% carbamide peroxide were significantly lower compared to the non-bleached controls. Fractography revealed an adhesive failure mode in all specimens. Qualitative comparisons of resin tags present in the bleached and unbleached specimens using scanning electron microscopy (SEM) revealed few, thin and fragmented resin tags when 38% hydrogen peroxide and 10% carbamide peroxide were used.
Department of Biomaterials Science, Baylor College of Dentistry, Texas A&M University System Health Science Center, Dallas, TX 75246, USA. ael-din@tambcd.edu
Amal K
AK
Nour El-din
Barbara H
BH
Miller
Jason A
JA
Griggs
Charles
C
Wakefield
D000096:Acetone / Q000737:chemistry; D000269:Adhesives / Q000737:chemistry; D000818:Animals; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D000077463:Carbamide Peroxide; D002417:Cattle; D003188:Composite Resins / Q000737:chemistry; D001840:Dental Bonding / Q000379:methods*; D003743:Dental Enamel / Q000648:ultrastructure*; D003764:Dental Materials / Q000737:chemistry*; D017220:Dentin-Bonding Agents / Q000737:chemistry; D004338:Drug Combinations; D000431:Ethanol / Q000737:chemistry; D006861:Hydrogen Peroxide / Q000737:chemistry; D008689:Methacrylates / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D016877:Oxidants / Q000737:chemistry; D010545:Peroxides / Q000737:chemistry; D011897:Random Allocation; D033081:Shear Strength; D012997:Solvents / Q000737:chemistry; D013314:Stress, Mechanical; D013499:Surface Properties; D013997:Time Factors; D014073:Tooth Bleaching / Q000379:methods; D014508:Urea / Q000031:analogs & derivatives / Q000737:chemistry
D000269:Adhesives; C103506:Bis-GMA, BPDM, HEMA dental-bonding resin; D003188:Composite Resins; D003764:Dental Materials; D017220:Dentin-Bonding Agents; D004338:Drug Combinations; D008689:Methacrylates; D016877:Oxidants; D010545:Peroxides; D012997:Solvents; C115612:single bond; D000096:Acetone; D000077463:Carbamide Peroxide; D000431:Ethanol; D017438:Bisphenol A-Glycidyl Methacrylate; D014508:Urea; D006861:Hydrogen Peroxide