title: Effect of hybridization on bond strength and adhesive interface after acid-base challenge using 4-META/MMA-TBB resin.
abstract: The purposes of this study were twofold, namely to evaluate: (1) the effect of hybridization on microtensile bond strength (microTBS) to dentin, and (2) the ultrastructure of the dentin-adhesive interface with 4-META/MMA-TBB resin after acid-base challenge. Dentin surfaces, which received no treatment (NT), 65% phosphoric acid (PA), or 10% citric acid-3% ferric chloride (10-3), were bonded with a 4-META/MMA-TBB resin. To evaluate dentin bond strength, microTBS test was performed at a crosshead speed of 1 mm/min. For ultrastructural evaluation of the adhesive interfaces, SEM was used to examine the interfaces of the bonded specimens after acid-base challenge. The microTBS of NT was not determined, while that of 10-3 was significantly higher than that of PA (p < 0.05). With PA and 10-3, the hybrid layer was clearly observed, but no so for the acid-base resistant zone. Wall lesion was found in NT only. In conclusion, hybridization is vital to improving microTBS to dentin and enhancing resistance at the adhesive interface against acid-base challenge.
authors.affiliation: Cariology and Operative Dentistry, Department of Restorative Sciences, Graduate School, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8549, Japan gakky1978@gmail.com
authors.forename: Tomohiro
authors.initials: T
authors.lastname: Takagaki
authors.forename: Toru
authors.initials: T
authors.lastname: Nikaido
authors.forename: Satoko
authors.initials: S
authors.lastname: Tsuchiya
authors.forename: Masaomi
authors.initials: M
authors.lastname: Ikeda
authors.forename: Richard M
authors.initials: RM
authors.lastname: Foxton
authors.forename: Junji
authors.initials: J
authors.lastname: Tagami
mesh_terms: D000268:Adhesiveness; D001896:Boron Compounds / Q000737:chemistry*; D002424:Caustics / Q000737:chemistry; D002614:Chelating Agents / Q000737:chemistry; D002712:Chlorides; D019343:Citric Acid / Q000737:chemistry; D001840:Dental Bonding; D003764:Dental Materials / Q000737:chemistry; D003804:Dentin / Q000648:ultrastructure*; D005290:Ferric Compounds / Q000737:chemistry; D006801:Humans; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry*; D008768:Methylmethacrylates / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D010756:Phosphoric Acids / Q000737:chemistry; D019279:Resin Cements / Q000737:chemistry*; D013314:Stress, Mechanical; D013499:Surface Properties; D013696:Temperature; D013718:Tensile Strength; D013997:Time Factors; D014867:Water / Q000737:chemistry
chemical_list: D001896:Boron Compounds; D002424:Caustics; D002614:Chelating Agents; D002712:Chlorides; D003764:Dental Materials; D005290:Ferric Compounds; D008689:Methacrylates; D008768:Methylmethacrylates; D010756:Phosphoric Acids; D019279:Resin Cements; D014867:Water; D019343:Citric Acid; C049495:Super-bond; C030242:phosphoric acid; C024555:ferric chloride