Color Assessment of adhesive resin cement cured by two different curing modes bonded to lithium disilicate glass ceramics after artificial aging.
Mohamed M. Abubaker Elshewy1 BDS, Msc.
The shade selection for indirect restorations is connected to the perception of chromatic hues of dental structures, cement and restorative material. Composite resin luting agents are the preferred materials for adhesively bonding ceramic restorations.
Aim of the study: is to evaluate color changes of adhesive resin cements bonded to ceramic with two different curing modes after artificial aging.
Materials and methods: This study was carried out on three groups of 10 samples of All ceramic material(IPS E-max press ingot) and Adhesive Resin Cement (Variolink N) cured with two different curing modes Light, and Dual cure . The steps of the Methodology are; fabrication of the samples, grouping &labeling, cementation, artificial aging, color measurements, and statistical analysis of the measured data.
The results showed that the cement type had a statistically significant effect on mean (∆E)( P-value <0.001) . Thermo cycling had a statistically significant effect on mean (∆E) P-value <0.001).The interaction between these two variables had no statistically significant effect on mean (∆E) (P-value: 0.162).
Conclusion: Thermocycling and curing mode affects final shade of the tested bonded all ceramic material. Light cured resin cement bonded samples showed less color change than dual cured bonded resin samples after first and second thermocycling procedure.
Key Words: ALL CERAMIC MATERIAL, E-MAX PRESS INGOT, COLOR CHANGES OF ADHESIVE RESIN CEMENTS, DIFFERENT CURING MODES.