The root canal bonding of chemical-cured total-etch resin cements.
Discovering a durable restorative method to reconstruct and reinforce pulpless teeth is a vital key to help prevent root fractures. Complete and firm adhesion of resin cement in root canal dentin using a post is critical to achieve it. The null hypothesis in the present study was that the bond strength of dual-cured and chemical-cured adhesive resin cements to root canal dentin is not affected by their vertical locations in the root canal. In the experiments, extracted human incisors restored with fiber-reinforced posts and adhesive resin cements were subjected to microtensile bond strength testing. Then, the failure modes and the dentin-bonding interfaces were observed. Self-etch and self-adhesive dual-cured resin cements showed frequent pretesting failure despite using a silane coupling agent. Chemical-cured total-etch adhesive material showed stable bonding performances throughout the entire post space and thus has an advantage in post-core restorations.
Hayashi
Mikako
M
Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry, Osaka, Japan. mikarin@dent.osaka-u.ac.jp
Okamura
Kenji
K
Wu
Hongxia
H
Takahashi
Yutaka
Y
Koytchev
Evgeni V
EV
Imazato
Satoshi
S
Ebisu
Shigeyuki
S
D000134:Acid Etching, Dental / Q000379:methods; D001896:Boron Compounds; D001840:Dental Bonding; D003786:Dental Pulp Cavity; D019232:Dental Restoration Failure; D003799:Dental Stress Analysis; D003804:Dentin; D006801:Humans; D007180:Incisor; D008422:Materials Testing; D008689:Methacrylates; D008768:Methylmethacrylates; D044367:Phase Transition; D011176:Post and Core Technique; D019279:Resin Cements; D012821:Silanes; D013718:Tensile Strength
D001896:Boron Compounds; D008689:Methacrylates; D008768:Methylmethacrylates; C438843:Panavia-Fluoro; C483701:Rely X Unicem; D019279:Resin Cements; D012821:Silanes; C049495:Super-bond