title: Effect of UV irradiation on the shear bond strength of titanium with segmented polyurethane through gamma-mercapto propyl trimethoxysilane.
abstract: The objective of this study was to investigate the effect of UV irradiation on shear bond strength between a titanium (Ti) and a segmented polyurethane (SPU) composite through gamma-mercapto propyl trimethoxysilane (gamma-MPS). To this end, the shear bond strength of Ti/SPU interface of Ti-SPU composite under varying conditions of ultraviolet ray (UV) irradiation was evaluated by a shear bond test. The glass transition temperatures of SPU with and without UV irradiation were also determined using differential scanning calorimetry. It was found that the shear bond strength of Ti/SPU interface increased with UV irradiation. However, excessive UV irradiation decreased the shear bond strength of Ti/SPU interface. Glass transition temperature was found to increase during 40-60 seconds of UV irradiation. In terms of durability after immersion in water at 37 degrees C for 30 days, shear bond strength was found to improve with UV irradiation. In conclusion, UV irradiation to a Ti-SPU composite was clearly one of the means to improve the shear bond strength of Ti/SPU interface.
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: 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: D002152:Calorimetry, Differential Scanning; D001840:Dental Bonding; D003764:Dental Materials / Q000737:chemistry*; D005898:Glass / Q000737:chemistry / Q000528:radiation effects; D006801:Humans; D007101:Immersion; D017646:Organosilicon Compounds; D044367:Phase Transition; D011091:Polyesters / Q000737:chemistry / Q000528:radiation effects; D011140:Polyurethanes / Q000737:chemistry / Q000528:radiation effects*; D033081:Shear Strength; D012821:Silanes / Q000737:chemistry / Q000528:radiation effects*; D013314:Stress, Mechanical; D013438:Sulfhydryl Compounds / Q000737:chemistry / Q000528:radiation effects*; D013696:Temperature; D013997:Time Factors; D014025:Titanium / Q000737:chemistry / Q000528:radiation effects*; D044366:Transition Temperature; D014466:Ultraviolet Rays; D014867:Water / Q000737:chemistry
chemical_list: D003764:Dental Materials; D017646:Organosilicon Compounds; D011091:Polyesters; D011140:Polyurethanes; D012821:Silanes; D013438:Sulfhydryl Compounds; C528223:corethane 70A; D014867:Water; C102833:(3-mercaptopropyl)trimethoxysilane; D014025:Titanium