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Effect of Resin-based Luting Agent on Fluorescence of Feldspathic Ceramics

Objectives: To evaluate the effect of resin-based luting agenton the fluorescence on feldspathic ceramics with different thickness.
Methods: Feldspathic ceramic (CEREC Blocs) discs, A2, with thicknesses of 0.5 and 0.8 mm were obtained (n=180). Resin composite discs (Filtek Supreme XTE, A3 Body) were prepared using a resin former, according to the manufacturer's instructions, which served as substrate. The ceramic samples were randomly paired with the resin disks and bonded with one of the following shade of resin-based luting agent: Variolink Esthetic (VE): shades Light, Warm, Neutral; Relyx Veneer (RV): B 0,5/white, Translucent, A3 Opaque/yellow; and flowable resin composite G-aenial Flo (GF): shades A2 and A3. After 24h of storage, fluorescence spectra were obtained on a SPEX Fluorolog2I2I, at a wavelength of 380 nm and at room temperature. Data were statistically analyzed using two-way ANOVA and Tukey test (p< 0.05).







Results: Fluorescence emission intensity values were significantly influenced by the luting material shade and thickness of ceramic (p<0.001) and the restorative material (p<0.001). Interaction between both factors was also significant (p<0.001). G-aenial Flo A3 groups showed the highest values, without differences with the Variolink N and G-aenial Flo groups in 0.50-mm-thick ceramic restorations. Samples bonded with RelyX Veneer A3 and B 0.5/white, exhibited the lowest fluorescence emission intensity, regardless the thickness of feldspathic ceramic.


Conclusions: Type and shade of resin-based luting agent influences the final fluorescence of feldspathic ceramic restorations.

Division: Continental European and Scandinavian Divisions Meeting
Meeting: 2019 Continental European and Scandinavian Divisions Meeting (Madrid, Spain)
Location: Madrid, Spain
Year: 2019
Final Presentation ID: 0342
Abstract Category|Abstract Category(s): Dental Materials 7: Color and Appearance (Esthetics)
Authors
  • Pereira, Joana  ( Instituto Universitário Egas Moniz , Lisboa , Carcavelos , Portugal ;  Universidade Rey Juan Carlos , Madrid , Alcorcon , Spain )
  • Reis, Jose  ( Instituto Universitário Egas Moniz , Lisboa , Carcavelos , Portugal )
  • Martins, Francisco  ( Instituto Universitário Egas Moniz , Lisboa , Carcavelos , Portugal )
  • Forjaz, Ana  ( Instituto Universitário Egas Moniz , Lisboa , Carcavelos , Portugal )
  • Barreto, Maria  ( Instituto Universitário Egas Moniz , Lisboa , Carcavelos , Portugal )
  • Maurício, Paulo  ( Instituto Universitário Egas Moniz , Lisboa , Carcavelos , Portugal )
  • Fuentes, Victoria  ( Universidade Rey Juan Carlos , Madrid , Spain )
    • Financial Interest Disclosure: NONE
    SESSION INFORMATION
    Poster Session
    Dental Materials: Color and Appearance (Esthetics) 2
    Friday, 09/20/2019 , 12:00PM - 01:00PM
    TABLES
    Fluorescence intensity. (a.u.) (medium ± standard deviation).
    GroupA-0,5 mmB-0,8 mm 
    G11,95E06 ± 3,08E05 (4)(5)(6)(8)1,65E06 ± 2,49E05 (4)(5)(6)(8)p=0,010 (a) (*)
    G21,81E06 ± 3,02E05 (4)(5)(6)(8)1,72E06 ± 1,55E05 (4)(5)(6)(8)p=0,410 (a)
    G32,07E06 ± 2,85E05 (4)(5)(6)(8)1,73E06 ± 1,18E05 (4)(5)(6)(8)p=0,004 (a) (*)
    G41,89E06 ± 2,48E05 (4)(5)(6)(8)1,38E06 ± 1,57E05 (4)(6)(8)p<0,001 (a) (*)
    G58,02E05 ± 2,38E05 (6)(7)(8)8,99E05 ± 1,56E05 (7)(8)p=0,393 (a)
    G69,79E05 ± 2,25E05 (6)(7)(8)1,16E06 ± 1,92E05 (6)(7)(8)p=0,118 (a)
    G73,54E05 ± 1,62E05 (7)(8)7,79E05 ± 1,47E05 (7)(8)p<0,001 (a) (*)
    G81,91E06 ± 1,73E05 (8)1,59E06 ± 2,53E05 (8)p=0,005 (a) (*)
    G92,47E06 ± 6,20E052,40E06 ± 1,33E05p=0,534(a)
     p<0,001 (a) (*)p<0,001 (a) (*) 
    (a) Two-way ANOVA (*) Identifies a statistically significant difference for a 95% confidence interval (1) Statistically significant difference with G2 (Pairwise Comparisons) (2) Statistically significant difference with G3 (Pairwise Comparisons) (3) Statistically significant difference with G4 (Pairwise Comparisons) (4) Statistically significant difference with G5 (Pairwise Comparisons) (5) Statistically significant difference with G6 (Pairwise Comparisons) (6) Statistically significant difference with G7 (Pairwise Comparisons) (7) Statistically significant difference with G8 (Pairwise Comparisons) (8) Statistically significant difference with G9 (Pairwise Comparisons)
    IMAGES

    3223656_File000002.jpg
    Diagram of the work methodology. A silicone mold was used as a mold for manufacturing the composite resin discs (1); placing the resin cements and flowable resins on the composite resin (2); placing the ceramic on the resin disk (3); pressure was applied in order to obtain a uniform thickness (4); polymerization of the sample (5); two study groups with ceramic thicknesses of 0.5 and 0.8 mm were obtained (6); the samples were marked for later identification (7); each sample was placed on a carrier and read on the spectrofluorometer (8). For the statistical analysis, two-way ANOVA was used, for a significance level of p <0.05.
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