Microtensile bond strength of dual-cure resin cement to root canal dentin with different curing strategies.
The purpose of this study was to measure the bond strength of dual-cure resin cement at different regions of root canal dentin using three kinds of curing method. Thirty-six extracted bovine teeth were used. Each root was sectioned vertically into halves. Their pulpal dentin walls were polished flat and then applied with two dual-cure resin cements (Bistite II, Panavia F), and divided into three curing strategy groups: multi-direction light, one-direction light and no-light. The bonded specimens were sectioned perpendicularly to the long axis of the root into approximately 0.7 mm thick slabs within two-third of the root from the coronal end, and prepared for microtensile bond strength (muTBS) test. Knoop hardness of the cements was also measured. Within each curing strategy for both dual-cure resin cements, there were no significant differences between the muTBS values at the coronal third and mid third regions. The effect of curing method on bond strength and KHN was found to be dependent on the material.
Kanno
Tama
T
Fixed Prosthodontics, Department of Restorative Sciences, Graduate School, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8549, Japan. kannnot.fpro@tmd.ac.jp
Ogata
Miwako
M
Foxton
Richard Mark
RM
Nakajima
Masatoshi
M
Tagami
Junji
J
Miura
Hiroyuki
H
D000134:Acid Etching, Dental / Q000379:methods*; D000704:Analysis of Variance; D000818:Animals; D002417:Cattle; D003188:Composite Resins / Q000737:chemistry / Q000528:radiation effects; D001840:Dental Bonding; D003786:Dental Pulp Cavity; D003799:Dental Stress Analysis; D003804:Dentin; D017220:Dentin-Bonding Agents / Q000737:chemistry / Q000528:radiation effects; D006244:Hardness; D008027:Light; D008422:Materials Testing; D019279:Resin Cements / Q000737:chemistry / Q000528:radiation effects; D013718:Tensile Strength
C096475:Bistite Resin Cement; D003188:Composite Resins; D017220:Dentin-Bonding Agents; C438843:Panavia-Fluoro; D019279:Resin Cements