Marginal integrity after fatigue loading of ceramic inlay restorations luted with three different cements.
OBJECTIVE
To evaluate the effect of fatigue loading on the quality of the cement around the margins of adhesive ceramic MOD inlays.


METHODS
Non-metal IPS Corum porcelain inlays were made and cemented either with the resin-based composite Variolink, the compomer Dyract-Cem or the glass-ionomer cement Ketac-Cem. For each system, half of the specimens were subjected to thermal and mechanical load cycling to simulate fatigue loading. All teeth were then sectioned and evaluated by SEM on topography and by optical microscopy for dye penetration.


RESULTS
Before loading, all systems showed good marginal integrity. After loading, inlays cemented with Variolink and Dyract-Cem showed no significant (P > 0.05) increase in marginal break down, however restorations cemented with Ketac-Cem, showed a significant (P < 0.05) deterioration at the margins.
Abdalla
A I
AI
Department of Restorative Dentistry, Faculty of Dentistry, University of Tanta, Egypt. aliebraheem@hotmail.com
Davidson
C L
CL
D002484:Cementation; D002516:Ceramics / Q000737:chemistry*; D004396:Coloring Agents; D020770:Compomers / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry; D003738:Dental Cements / Q000737:chemistry* / Q000145:classification; D003763:Dental Leakage / Q000145:classification / Q000473:pathology; D018772:Dental Marginal Adaptation; D003776:Dental Porcelain / Q000737:chemistry; D005899:Glass Ionomer Cements / Q000737:chemistry; D006801:Humans; D007284:Inlays / Q000145:classification; D008277:Magnesium Oxide / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D011076:Polycarboxylate Cement / Q000737:chemistry; D019279:Resin Cements / Q000737:chemistry; D018709:Statistics, Nonparametric; D013314:Stress, Mechanical; D013499:Surface Properties; D013816:Thermodynamics; D015034:Zinc Oxide / Q000737:chemistry
D004396:Coloring Agents; D020770:Compomers; D003188:Composite Resins; D003738:Dental Cements; D005899:Glass Ionomer Cements; D011076:Polycarboxylate Cement; D019279:Resin Cements; C400935:dyract-cem; D003776:Dental Porcelain; C103502:Variolink; D008277:Magnesium Oxide; C040235:Ketac-cem; D015034:Zinc Oxide