Influence of mechanical properties of two resin cements on durability of bond strength to dentin after cyclic loading.
The purpose of this study was to evaluate how the different mechanical properties of two luting agents (acrylic resin cement and resin composite cement) influenced their bond strength to dentin, after cyclic loading that simulated chewing. Stainless steel rods were bonded to the flattened dentin surfaces with each luting agent. After immersion in water for 24 hours, half the specimens of each group were tested for tensile bond strength and the remaining half were subjected to a vertical load (75.6 N, 1.2 Hz) using an acrylic stylus--which upon contact with the specimen would rotate counterclockwise and then counter-rotate. Bond strength of the resin composite cement with self-etching was found to be significantly lower than the other adhesive systems. After 100,000 cycles, the bond strength of resin composite cement was significantly decreased while acrylic resin cement showed no decrease in bond strength.
Soeno
Kohyoh
K
Nagasaki University, Graduate School of Biomedical Sciences, Department of Developmental and Reconstructive Medicine, Division of Fixed Prosthodontics and Oral Rehabilitation, 1-7-1, Sakamoto, Nagasaki 852-8588, Japan. soeno@net.nagasaki-u.ac.jp
Suzuki
Shiro
S
Taira
Yohuske
Y
Sawase
Takashi
T
Atsuta
Mitsuru
M
D000134:Acid Etching, Dental / Q000379:methods; D000180:Acrylic Resins / Q000737:chemistry; D001732:Bite Force; D003188:Composite Resins / Q000737:chemistry; D001840:Dental Bonding; D003799:Dental Stress Analysis / Q000295:instrumentation; D003804:Dentin / Q000648:ultrastructure*; D006801:Humans; D008409:Mastication / Q000502:physiology; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D010756:Phosphoric Acids / Q000737:chemistry; D019279:Resin Cements / Q000737:chemistry*; D013314:Stress, Mechanical; D013499:Surface Properties; D013718:Tensile Strength; D013997:Time Factors; D014867:Water / Q000737:chemistry
D000180:Acrylic Resins; D003188:Composite Resins; C500742:ED Primer II; D008689:Methacrylates; C438843:Panavia-Fluoro; D010756:Phosphoric Acids; D019279:Resin Cements; C084543:Super Bond D-Liner; D014867:Water; C030242:phosphoric acid