title: Effect of active hydroxyl groups on the interfacial bond strength of titanium with segmented polyurethane through gamma-mercapto propyl trimethoxysilane.
abstract: The objective of this study was to investigate the effect of active hydroxyl groups on a titanium (Ti) surface on the bond strength between Ti and segmented polyurethane (SPU) composite through gamma-mercapto propyl trimethoxysilane (gamma-MPS). Active hydroxyl groups on Ti surface oxide were controlled by immersion in hydrogen peroxide (H2O2) with different lengths of immersion time, and the resulting concentrations of active hydroxyl groups were evaluated using a zinc-complex substitution technique. For the H2O2-treated Ti, it was characterized using X-ray photoelectron spectroscopy and scanning electron spectroscopy. For the bond strength of Ti/ gamma-MPS/SPU interface, it was determined using a shear bond test. Results showed that the bond strength increased with increase in the concentration of active hydroxyl groups. In terms of durability after immersion in water at 310 K for 30 days, it was found that bond strength was improved with increase in active hydroxyl groups. Based on the results obtained, active hydroxyl groups on the surface oxide film were clearly one of the causes governing the interfacial bond strength.
authors.affiliation: Department of Metals, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kanda-surugadai, Chiyoda-ku, Tokyo 101-0062, Japan.
authors.forename: Harumi
authors.initials: H
authors.lastname: Sakamoto
authors.forename: Yohei
authors.initials: Y
authors.lastname: Hirohashi
authors.forename: Haruka
authors.initials: H
authors.lastname: Saito
authors.forename: Hisashi
authors.initials: H
authors.lastname: Doi
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Tsutsumi
authors.forename: Yoshiaki
authors.initials: Y
authors.lastname: Suzuki
authors.forename: Kazuhiko
authors.initials: K
authors.lastname: Noda
authors.forename: Takao
authors.initials: T
authors.lastname: Hanawa
mesh_terms: D001840:Dental Bonding; D003764:Dental Materials / Q000737:chemistry*; D004577:Electron Probe Microanalysis; D006801:Humans; D006861:Hydrogen Peroxide / Q000737:chemistry; D006878:Hydroxides / Q000737:chemistry*; D007101:Immersion; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D017646:Organosilicon Compounds; D016877:Oxidants / Q000737:chemistry; D011140:Polyurethanes / Q000737:chemistry*; D033081:Shear Strength; D012821:Silanes / Q000737:chemistry*; D013314:Stress, Mechanical; D013438:Sulfhydryl Compounds / Q000737:chemistry*; D013997:Time Factors; D014025:Titanium / Q000737:chemistry*; D015032:Zinc / Q000737:chemistry
chemical_list: D003764:Dental Materials; D006878:Hydroxides; D017646:Organosilicon Compounds; D016877:Oxidants; D011140:Polyurethanes; D012821:Silanes; D013438:Sulfhydryl Compounds; C009495:titanium dioxide; C102833:(3-mercaptopropyl)trimethoxysilane; C031356:hydroxide ion; D006861:Hydrogen Peroxide; D014025:Titanium; D015032:Zinc