Effect of bonding variables on the shear bond strength and interfacial morphology of a one-bottle adhesive.
This study's objectives were: 1) to determine the combination of bonding procedures (with or without acid etching, moist or dry substrate, one or two applications of primer/adhesive) that would produce the highest shear bond strength of Prime & Bond and Dyract AP and 2) to characterize the resin-dentin/enamel interface produced by these bonding procedures. Ninety-six bovine incisors were randomly assigned to eight groups for shear bond testing to enamel (n = 6) and dentin (n = 6). Prime & Bond and Dyract AP were applied and cured following manufacturers' instructions. Shear bond testing was conducted in a Universal Testing Machine. Thirty-two bovine incisors were sectioned to produce blocks with enamel and dentin, then bonded in pairs for evaluation of interfacial morphology. They were polished and argon ion-etched using a high-speed argon ion-etching machine and examined by SEM. The groups where enamel was etched, kept moist or dry and received a single application of Prime & Bond produced the highest shear bond strength. Dentin bond strengths were high in the groups where dentin was etched and kept moist. The number of Prime & Bond applications had no effect on dentin bond strength. Acid etching results in better adaptation of Prime & Bond to enamel and dentin regardless of whether moisture is present.
Medina
V
V
Department of Operative Dentistry, School of Dentistry at Niigata, The Nippon Dental University, 1-8 Hamaura-cho, Niigata 951-8580, Japan.
Shinkai
K
K
Shirono
M
M
Tanaka
N
N
Katoh
Y
Y
D000134:Acid Etching, Dental; D000704:Analysis of Variance; D000818:Animals; D017438:Bisphenol A-Glycidyl Methacrylate; D002417:Cattle; D020770:Compomers; D001840:Dental Bonding / Q000379:methods*; D003745:Dental Enamel Permeability; D003806:Dentin Permeability; D017220:Dentin-Bonding Agents; D008689:Methacrylates; D008855:Microscopy, Electron, Scanning; D011109:Polymethacrylic Acids; D011897:Random Allocation; D017640:Silicates; D018709:Statistics, Nonparametric; D013499:Surface Properties
D020770:Compomers; D017220:Dentin-Bonding Agents; C088486:Dyract; D008689:Methacrylates; D011109:Polymethacrylic Acids; C103500:Prime & Bond; D017640:Silicates; D017438:Bisphenol A-Glycidyl Methacrylate