Original scientific paper
https://doi.org/10.15644/asc49/2/4
In Vivo and in Vitro Evaluations of Repeatability and Accuracy of VITA Easyshade® Advance 4.0 Dental Shade-Matching Device
Dubravka KNEZOVIĆ ZLATARIĆ
; Department of Removable Prosthodontics, School of Dental Medicine, University of Zagreb, Zagreb, Croatia
Davor Illeš
; Department of Removable Prosthodontics, School of Dental Medicine, University of Zagreb, Zagreb, Croatia
Iva Ž Alajbeg
; Department of Removable Prosthodontics, School of Dental Medicine, University of Zagreb, Zagreb, Croatia
Maja Žagar
; Department of Removable Prosthodontics, School of Dental Medicine, University of Zagreb, Zagreb, Croatia
Abstract
Objectives: The objective of this study was to evaluate the intra-device repeatability and accuracy
of dental shade-matching device (VITA Easyshade® Advance 4.0) using both in vitro and in vivo
models. Materials and methods: For the repeatability assessment, the in vivo model utilized
shade-matching device to measure the central region of the labial surface of right maxillary central
incisors of 10 people twice. The following tooth colors were measured: B1, A1, A2, A3, C1
and C3. The in vitro model included the same six Vitapan Classical tabs. Two measurements were
made of the central region of each shade tab. For the accuracy assessment, each shade tab from
3 Vitapan Classical shade guides was measured once. CIE L*a*b* values were determined. Intraclass
correlation coefficients (ICCs) were used to analyze the in vitro and in vivo intra-device repeatability
of the shade-matching device. The difference between in vitro and in vivo models was
analyzed. Accuracy of the device tested was calculated. Results: The mean color differences for
in vivo and in vitro models were 3.51 and 1.25 E units, respectively. The device repeatability ICCs
for in vivo measurements ranged from 0.858 to 0.971 and for in vitro from 0.992 to 0.994. Accuracy
of the device tested was 93.75%. Conclusion: Within the limitations of the experiment, VITA
Easyshade®Advance 4.0 dental shade-matching device enabled reliable and accurate measurement.
It can be a valuable tool for the determination of tooth colours.
Keywords
Tooth; Color, Luminescent Measurements; Optical Devices
Hrčak ID:
139800
URI
Publication date:
18.6.2015.
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