@misc{10481/86804,
year = {2022},
month = {11},
url = {https://hdl.handle.net/10481/86804},
abstract = {Objectives: To evaluate the optical properties of gingiva-colored resin-based composites (GCRBCs).
Methods: Five discs (8 mm diameter x 1mm height) of 17 shades of GCRBCs were prepared. Diffuse reflectance
was measured against white and black backgrounds using a calibrated spectroradiometer, CIE D65 illuminant
and the CIE 45⁰/0⁰ geometry. Relative translucency parameter was calculated using ΔE00 (RTP00). Translucency
differences were evaluated using published data of 50:50% translucency perceptibility (TPT00) and acceptability
(TAT00) thresholds. Scattering (S) and absorption (K) coefficients and transmittance (T%) were calculated using
Kubelka–Munk’s equations. Data were statistically analyzed using Kruskal–Wallis, Mann–Whitney tests, and VAF
coefficient.
Results: The RTP00 values of the 17 evaluated shades ranged from 8.69 to 21.34. There were perceptible
translucency differences (TPT00=0.62) between different shades of the same brand and between composites
designated with the same shade of different brands. Spectral distributions of S, K and T were wavelength-
dependent. Although the spectral behavior of the S and K coefficients and T% were similar for all the gingival
composites evaluated, the values of these parameters presented statistically significant differences between
shades, which would justify the differences found in the relative translucency parameter.
Conclusions: The optical properties S, K and T% of GCRBCs were significantly different, resulting in perceptible
translucency differences between the same shade of different commercial brands and between different shades of
the same brand.
Clinical significance: Translucency differences of gingiva-colored composites may significantly influence their
masking ability affecting the clinician’s choice of restorative material.},
organization = {Spanish Ministry of Science, Innovation and Universities (PGC2018-101904-A-100)},
organization = {i+D+I Government of Andalusia 2020, Spain (P20-00200)},
publisher = {Elsevier},
keywords = {Gingiva-colored resin-based composite},
keywords = {Translucency},
keywords = {Scattering},
keywords = {Absorption},
keywords = {Transmittance},
title = {Relevant optical properties for gingiva-colored resin-based composites},
doi = {10.1016/j.jdent.2022.104316},
author = {Lucena Martín, Cristina and Benavides Reyes, Cristina and Ruiz López, Javier and Tejada Casado, María de la Natividad and Pulgar Encinas, Rosa María and Pérez Gómez, María Del Mar},
}