Microtensile bond strength to dentin and cavity adaptation of Cerec 2 inlay restoration.
OBJECTIVE
To examine the bond strength of Cerec 2 inlays both to dentin surface by microtensile testing and to cavity walls by cavity adaptation in Class II restorations, using three luting materials.


METHODS
VitaMark II disc was bonded to the coronal dentin surface with Clapearl DC (Clearfil DC)/Linerbond IIsigma (Linerbond 2V), AP-X/Linerbond IIsigma or Fluorocement (Panavia F)/ED Primer. After 24-hr storage in water, microtensile bond strengths (MTB) were measured. Additionally, Cerec inlays were luted to the MO cavities prepared in molars with the same materials. After thermocycling (x2000), the restorations were sectioned mesio-distally. Gap formation was microscopically examined along the cavity walls.


RESULTS
There was no significant difference in MTB among the materials (Clapearl DC: 20.89 +/- 4.58 MPa, AP-X: 24.22 +/- 5.97 MPa, Fluorocement: 19.82 +/- 6.43 MPa, Scheffé, P > 0.05). The frequency of gap formation was higher in AP-X than in Clapearl DC and Fluorocement (chi2-test, P < 0.05). Debonding occurred more often at the luting material/dentin interface than at the inlay/luting material interface (Sign test, P < 0.05).
Uno
S
S
Department of Operative Dentistry, Hokkaido University School of Dentistry, Sapporo, Japan. unoshi@den.hokudai.ac.jp
Tanaka
T
T
Kawamoto
C
C
Konishi
J
J
Sano
H
H
D000704:Analysis of Variance; D002516:Ceramics / Q000737:chemistry*; D016009:Chi-Square Distribution; D001840:Dental Bonding; D003737:Dental Cavity Preparation; D003738:Dental Cements / Q000737:chemistry*; D018772:Dental Marginal Adaptation; D003776:Dental Porcelain / Q000737:chemistry*; D003804:Dentin / Q000648:ultrastructure*; D017220:Dentin-Bonding Agents / Q000737:chemistry; D006801:Humans; D007284:Inlays / Q000145:classification; D008689:Methacrylates / Q000737:chemistry; D008963:Molar; D019279:Resin Cements / Q000737:chemistry; D013223:Statistics as Topic; D018709:Statistics, Nonparametric; D013499:Surface Properties; D013718:Tensile Strength; D013816:Thermodynamics; D013997:Time Factors; D014867:Water / Q000737:chemistry
C112828:Clearfil AP-X; D003738:Dental Cements; D017220:Dentin-Bonding Agents; C433104:Fluorocement; D008689:Methacrylates; D019279:Resin Cements; C082340:Vita Mark II; C109836:clapearl DC; D014867:Water; D003776:Dental Porcelain; C074543:Cerec