Effect of ultraviolet light irradiation period on bond strengths between fiber-reinforced composite post and core build-up composite resin.
The aim of the present study was to characterize the effects of the ultraviolet light (UV) irradiation period on the bond strength of fiber-reinforced composite (FRC) posts to core build-up resin. Three types of FRC posts were prepared using polymethyl methacrylate, urethane dimethacrylate, and epoxy resin. The surfaces of these posts were treated using UV irradiation at a distance of 15 mm for 0 to 600 s. The pull-out bond strength was measured and analyzed with the Dunnett's comparison test (α=0.05). The bond strengths of the post surfaces without irradiation were 6.9 to 7.4 MPa; those after irradiation were 4.2 to 26.1 MPa. The bond strengths significantly increased after 15 to 120-s irradiation. UV irradiation on the FRC posts improved the bond strengths between the FRC posts and core build-up resin regardless of the type of matrix resin.
Advanced Biomaterials, Department of Restorative Sciences, Division of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University.
Yuya
Y
Asakawa
Hidekazu
H
Takahashi
Naohiko
N
Iwasaki
Masahiro
M
Kobayashi
D003188:Composite Resins / Q000737:chemistry* / Q000528:radiation effects*; D001840:Dental Bonding; D003799:Dental Stress Analysis; D005898:Glass / Q000737:chemistry / Q000528:radiation effects; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry / Q000528:radiation effects; D019904:Polymethyl Methacrylate / Q000737:chemistry / Q000528:radiation effects; D011140:Polyurethanes / Q000737:chemistry / Q000528:radiation effects; D011176:Post and Core Technique; D013499:Surface Properties; D014466:Ultraviolet Rays
D003188:Composite Resins; D008689:Methacrylates; D011140:Polyurethanes; C009753:fiberglass; C029824:urethane dimethacrylate luting resin; D019904:Polymethyl Methacrylate