Original scientific paper
https://doi.org/10.15644/asc55/1/1
Effect of Staining and Aging on Translucency Parameter of CAD-CAM Materials
Rubens Nisie Tango
Ana Todorović
; Department of Prosthodontics, School of Dental Medicine, University of Belgrade, Belgrade, Serbia
Dejan Stamenković
; Private practice, Belgrade and Houston Center for Biomaterials and Biomimetics (HCBB), University of Texas School of Dentistry at Houston, Houston, TX, USA
Duygu Narin Karasan
; Division of Fixed Prosthodontics and Biomaterials, University of Geneva, Geneva, Switzerland
Irena Sailer
; Division of Fixed Prosthodontics and Biomaterials, University of Geneva, Geneva, Switzerland
Rade Dušan Paravina
orcid.org/0000-0002-8459-5528
; Department of Restorative Dentistry and Prosthodontics and Houston Center for Biomaterials and Biomimetics (HCBB), University of Texas School of Dentistry at Houston, Houston, TX, USA
Abstract
Objectives: To evaluate different intervals of exposure to staining solutions and artificial aging on translucency parameter (TP 00) of CAD-CAM materials. Material and Methods: One millimeter thick square-shaped specimens (N = 288) were cut from Cerasmart (CS), IPS e.max (IE), Lava Ultimate (LU), Shofu HC (SH), Vita Enamic (VE), and Vita Suprinity (VS) and were divided into laboratory and chairside polishing. Reflection wavelength spectra, CIE D65 standard illuminant, 2 ° standard observer, SCI, UV included, SAV aperture, 6 mm diameter, were recorded at 10 nm sensitivity against white and black calibration tiles using a benchtop spectrophotometer. Subsequently, they were converted into CIEDE 2000 TP 00. After baseline measurements (T0), the specimens were divided as follows (n = 8): staining in coffee (C) and wine (W), for 60 (T1) and 120 hours (T2), and accelerated artificial aging (A). Artificial aging (ISO 4892-2 standard) was performed in two cycles of 150 KJ/m 2, for T1 and T2, respectively. TP measurements were repeated at T1 and T2. Data of TP 00 retention were submitted to analysis of variance and Fisher’s PLSD multiple comparison test (α=0.05). Results: Fisher’s PLSD critical differences among materials, time intervals and staining/aging were 0.16, 0.11 and 0.11, respectively. SH showed the highest TP 00 followed by LU > CS > IE = VS > VE. For all time intervals, the lowest TP 00 retention was observed with C. W, and A presented similar values. Conclusions: Translucency Parameter was material, time and staining/aging-dependent material. In majority of cases, it decreased upon staining/aging.
Keywords
MeSH terms: Optical Phenomena; Coloring Agents; Age Factors; Organically Modified Ceramics; Lithium Compounds. Author keywords: Optical Properties, Psychophysics, Organically Modified Ceramic, Lithium Silicate, Lithium Disilicate
Hrčak ID:
254132
URI
Publication date:
20.3.2021.
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