RESEARCH ARTICLE


Shade Stability of Polymer-Infiltrated and Resin Nano Ceramics



Martin Gabriel Schürmann, Constanze Olms*
Department of Prosthodontics and Material Science, University of Leipzig, Liebigstr.12, 04103 Leipzig, Germany


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Creative Commons License
© 2018 Schürmann and Olms.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: (https://creativecommons.org/licenses/by/4.0/legalcode). This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the Department of Prosthodontics and Material Science, University of Leipzig, Liebigstr.12, 04103 Leipzig, Germany; Tel: 03419721365; Fax: 03459721319; E-mail: constanze.olms@medizin.uni-leipzig.de


Abstract

Background:

The esthetics plays an increasingly significant role in today's dentistry.

Objective:

The objective was to investigate the shade stability of a polymer-infiltrated and a resin nano ceramic in comparison to a conventional feldspar ceramic and an acrylate polymer.

Methods:

20 specimens of each of the materials, CAD-Temp (CT), Mark II (M), VITA Enamic (VE) and Lava Ultimate (LU), were prepared using the standard method. These were divided into groups (n=5) and placed in the following stain solutions: Distilled water, coffee, Coca-Cola and red wine for 14 days. The shade of each specimen was measured before and after using a spectrophotometer (n=5). The data were analyzed using ANOVA and Tukey's test (p ≤ 0.05).

Results:

The largest ΔE mean values were observed in CT by Coca-Cola (4.38 ± 0.41), in M by coffee (5.95 ± 0.62), in VE (6.02 ± 0.78) and LU (8.61 ± 0.30) by red wine. LU had the largest and strongest overall shade differences (total score: SSC=16.95) and CT the least (SSC=8.74). Overall shade differences of VE (SSC=12.03) and M (SSC=12.48) were statistically indistinguishable. After 14 days, only Coca-Cola caused clinically relevant shade differences in CT (ΔE > 2.7); this was also caused by coffee, Coca-Cola and red wine in M and coffee and red wine in VE and LU.

Conclusion:

On average, VE showed fewer shade differences than LU. After 14 days of immersion, shade differences which exceeded the clinical acceptance threshold of ΔE=2.7 were shown by CT in Coca-Cola, by M in coffee, Coca-Cola and red wine, and by VE and LU in coffee and red wine.

Keywords: Shade stability, Polymer-infiltrated ceramic, Resin nano ceramic, Spectrophotometer, VITA Easyshade, VITA Enamic, Lava Ultimate.