Resin-modified glass-ionomers: effect of dentin primer application on the development of bond strength.
The purpose of this study was to investigate the rate of development of dentin bond strengths of resin-modified glass-ionomer cements (RMGIC) with use of dentin primers. The prepared dentin surface was treated according to each manufacturer's instruction or the dentin primer. Cements were condensed into a vinyl mold and light activated. The shear bond strengths were measured at a crosshead speed of 1.0 mm/min after 1, 5, 10, 30, 60 min, 2, 5, and 24 h storage in water at 37 degrees C. Presence of a significant difference between the mean bond strength at 1 min and each of the other test times was analyzed. The first time at which there was a significant increase in bond strength was defined as the "initial increasing time". As compared with the manufacturer's suggested dentin treatments, the bond strengths increased significantly when the dentin primers were used. The initial increasing times when the specimens were made following each manufacturer's instructions were 10 approximately 60 min. When dentin primer was used, the initial increasing time shortened to 5 approximately 10 min. It was concluded that the use of dentin primers for RMGIC restorations resulted in reduction of the initial increasing time.
Miyazaki
M
M
Department of Operative Dentistry, Nihon University School of Dentistry, Tokyo, Japan. miyazaki-m@dent.nihon-u.ac.jp
Iwasaki
K
K
Onose
H
H
Moore
B K
BK
D000180:Acrylic Resins / Q000737:chemistry; D000818:Animals; D002417:Cattle; D003188:Composite Resins / Q000737:chemistry; D001840:Dental Bonding; D003738:Dental Cements / Q000737:chemistry; D003804:Dentin / Q000648:ultrastructure; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D005460:Fluorides, Topical / Q000737:chemistry; D005899:Glass Ionomer Cements / Q000737:chemistry*; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D008768:Methylmethacrylates / Q000737:chemistry; D010795:Phthalic Acids / Q000737:chemistry; D019279:Resin Cements / Q000737:chemistry*; D012117:Resins, Synthetic / Q000737:chemistry; D013314:Stress, Mechanical; D013997:Time Factors; D014233:Tricarboxylic Acids / Q000737:chemistry; D014867:Water
C111562:4-acryloxyethyltrimellitic acid; D000180:Acrylic Resins; D003188:Composite Resins; D003738:Dental Cements; D017220:Dentin-Bonding Agents; D005460:Fluorides, Topical; C072652:FluoroBond; C079765:Fuji II LC cement; D005899:Glass Ionomer Cements; D008689:Methacrylates; D008768:Methylmethacrylates; C092987:Optibond; D010795:Phthalic Acids; D019279:Resin Cements; D012117:Resins, Synthetic; D014233:Tricarboxylic Acids; C084550:Vitremer; D014867:Water; C084541:Fuji glass-ionomer lining cement; C006903:carbopol 940; C005044:hydroxyethyl methacrylate; C009931:poly(ethylmethacrylate)