@misc{10481/75679,
year = {2022},
month = {5},
url = {http://hdl.handle.net/10481/75679},
abstract = {Objectives This study aims to evaluate in vivo the color agreement between natural teeth and dental shade guides by means
of visual and instrumental coverage error ( CE ) index.
Materials and methods The color of the middle third of 735 incisors was visually determined by two evaluators using the
Vita Classical (VC) and Vita 3D Master (V3DM) shade guides. The color match between the natural tooth and the shade tab
was rated as poor (P), good (G), or optimum (O) by each observer. CIE color coordinates of the target teeth and shade tabs
of VC and V3DM were instrumentally measured using a clinical spectrophotometer. Visual ( CE
V ) and instrumental ( CE
I )
coverage error indexes were computed using CIELAB and CIEDE2000 metrics for both shade guides. For CE
V calculation,
only the concordant inter-observer determination on tooth shade rated as O–O or O–G was used. The results were evaluated
using perceptibility (PT, ΔE∗
ab = 1.2, ΔE
00 = 0.8) and acceptability (AT, ΔE∗
ab = 2.7, ΔE
00 = 1.8) color thresholds for dentistry.
Results VC and V3DM exhibited CE
I (2.5, 3.2, and 3.2, 2.7 CIELAB units; 1.9, 2.3, and 2.8, 2.4 CIEDE2000 units, respectively,
for O–O and O–G match) and CE
V (4.7, 4.8, and 4.1, 4.6 CIELAB units; 3.3, 3.4, and 3.4, 3.6 CIEDE2000 units,
respectively, for O–O and O–G match) values greater than 50:50% AT for both color difference formulas. CE
I contributes
more than 50% (53.2–82.4% range) to the CE
V value. This contribution depends on the shade guide used and the quality of
the visual rating.
Conclusions The evaluated shade guides exhibited visual coverage errors above acceptability thresholds, largely due to the
contribution of the instrumental coverage error to the visual coverage error.
Clinical relevance It necessary to further improve commercially available dental shade guides to facilitate achievement of
satisfactory esthetics results in clinical practice.},
organization = {Universidad de Granada / CBUA},
organization = {Junta de Andalucia	P20-00200	
A.TEP.280.UGR18},
organization = {Spanish Government	PGC2018101,904-A-I00},
publisher = {Springer},
keywords = {Coverage error},
keywords = {Shade guides},
keywords = {Color differences},
keywords = {Shade matching},
title = {Visual and instrumental coverage error of two dental shade guides: an in vivo study},
doi = {10.1007/s00784-022-04556-0},
author = {Ruiz López, Javier and Pérez Gómez, María Del Mar and Lucena Martín, Cristina and Pulgar Encinas, Rosa María and López Toruño, Ana and Tejada Casado, María de la Nativida and Ghinea, Razvan Ionut},
}