Effects of grit blasting and silanization on bond strengths of a resin luting cement to Belleglass HP indirect composite.
OBJECTIVE
To investigate the extent of bonding possible of a resin luting cement with three opacities of Belleglass HP, representing different filler type and loading levels in a highly cross-linked resin matrix.


METHODS
Belleglass HP (3 opacities: opaque dentin, translucent dentin, cuspal enamel) was prepared as solid notched discs (Group A) or luted halves to create notched discs (Groups B-F). Luted samples were split through the notch on the Instron for conditions: as-is after molding (B), grit blasted with 50 microm Al2O3 (C), grit blasted and silanated (D) grit blasted, silanated, and stored 1 week (E), and grit blasted and treated with Artglass liquid (F). All the samples were stored in distilled water at 37 degrees C for 24 hours before testing. The fractured surfaces were examined by light and scanning electron microscopy (SEM) to assess the effect of the surface treatments.


RESULTS
The mean fracture resistance (+/- S.D) of the tested groups ranged from 7.6 (+/- 1.9 N mm(-1)) for Group A to 13.9 (+/- 5.4 N mm(-1)) for Group D. Two-way analysis of variance showed no significant interaction (P>0.05) between product opacities & surface treatments. The bonded inlay test halves in Groups B and C failed adhesively between the inlay test halves and the luting cement whereas the other three test groups (D,E,F) failed cohesively in the luting cement. One-way analysis of variance with post-hoc paired group Tukey testing revealed that Group D (13.9 +/- 5.4 N mm(-1)) performed significantly better (P<0.05) than Groups A (7.6 +/- 1.9 N mm(-1), B (9.2 +/- 3.7 N mm(-1)) or C (7.8 +/- 1.6 N mm(-1)). No statistical difference was found between Groups D to F (P>0.05).
Ellakwa
Ayman E
AE
Faculty of Dentistry, King Faisel University, PO Box 1982, Dammam 31441, Saudi Arabia. ellakwa@hotmail.com
Shortall
Adrian C C
AC
Burke
Frederick J T
FJ
Marquis
Peter M
PM
D000704:Analysis of Variance; D003188:Composite Resins / Q000737:chemistry*; D001840:Dental Bonding; D003737:Dental Cavity Preparation / Q000379:methods; D003738:Dental Cements / Q000737:chemistry*; D018772:Dental Marginal Adaptation; D003799:Dental Stress Analysis; D006801:Humans; D066298:In Vitro Techniques; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry*; D013499:Surface Properties
D003188:Composite Resins; D003738:Dental Cements; D008689:Methacrylates; C110370:belleGlass