title: Comparison of marginal integrity of ceramic and composite veneer restorations luted with two different resin agents: an in vitro study.
abstract: OBJECTIVE
  The aim of the present study was to examine the marginal integrity of a composite veneer, Artglass, in comparison to a ceramic veneer, IPS Empress, by using two different luting agents. The study also aimed to evaluate the effect of grit blasting on marginal integrity of IPS Empress ceramic veneers.
  
  
  METHODS
  A total of 42 human maxillary incisors were used to construct 14 veneers for each experimental group: (1) Artglass veneers, (2) IPS Empress veneers with grit blasting, and (3) IPS Empress veneers without grit blasting. Veneers were luted with Variolink II High Viscosity and Variolink Ultra. The restored teeth were sectioned buccolingually and mesiodistally, and marginal gap width measurements were made at 200x magnification. The data were statistically analyzed with analysis of variance.
  
  
  RESULTS
  The mean marginal gap width varied from 105 to 182 microns. No significant differences were recorded between the marginal gap widths in relation to different types of veneers or luting agents. However, significantly higher marginal discrepancies were observed for the incisal margins of IPS Empress veneers without grit blasting.
  
  
  CONCLUSIONS
  In view of the higher marginal discrepancy of IPS Empress veneers divested without grit blasting, the use of this alternative technique was not beneficial. The use of a highly filled resin luting agent (Variolink Ultra) did not cause an increase in marginal gap widths of the veneers.
authors.affiliation: Faculty of Dentistry, Marmara University, Istanbul, Turkey.
authors.forename: Ciğdem
authors.initials: C
authors.lastname: Celik
authors.forename: Deniz
authors.initials: D
authors.lastname: Gemalmaz
mesh_terms: D000538:Aluminum Silicates; D000704:Analysis of Variance; D003188:Composite Resins; D001840:Dental Bonding; D018772:Dental Marginal Adaptation; D003776:Dental Porcelain; D003801:Dental Veneers; D005899:Glass Ionomer Cements; D006801:Humans; D007180:Incisor; D019279:Resin Cements; D012823:Silicate Cement; D018709:Statistics, Nonparametric
chemical_list: D000538:Aluminum Silicates; D003188:Composite Resins; D005899:Glass Ionomer Cements; C075815:IPS-Empress ceramic; D019279:Resin Cements; C111282:dental polyglass; D003776:Dental Porcelain; D012823:Silicate Cement; C103502:Variolink