Reproducibility of tooth color gradation using a computer color-matching technique applied to ceramic restorations

Ishikawa-Nagai, Shigemi; Ishibashi, Kanji; Tsuruta, Osamu; Weber, Hans‐Peter

doi:10.1016/j.prosdent.2004.10.024

Cited by 59 publications

(68 citation statements)

References 14 publications

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“…Regarding the measurement and collection of data, the systems are different in terms of the size of area they are capturing. Systems that apply a multispectral camera system, compared to a one-spot device, are able to give a reliable shade gradation across different tooth regions [15]. These digital systems should theoretically improve communication with the laboratory and help obtain an accurate shade match of the restoration to the remaining teeth.…”

Section: Introductionmentioning

confidence: 99%

“…Studies comparing the visual (human) versus digital shade selection reveal poor agreement between these techniques and favor the instrumental and digital determination [6,10,15,[18][19][20][21][22][23][24][25][26]. However, one study demonstrated that human examiners showed a significantly higher agreement (40.2%) when compared with five digital devices [27].…”

Section: Introductionmentioning

confidence: 99%

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Reliability of shade selection using an intraoral spectrophotometer

et al. 2011

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In this study, we evaluate the accuracy and reproducibility of human tooth shade selection using a digital spectrophotometer. Variability among examiners and illumination conditions were tested for possible influence on measurement reproducibility. Fifteen intact anterior teeth of 15 subjects were evaluated for their shade using a digital spectrophotometer (Crystaleye, Olympus, Tokyo, Japan) by two examiners under the same light conditions representing a dental laboratory situation. Each examiner performed the measurement ten times on the labial surface of each tooth containing three evaluation sides (cervical, body, incisal). Commission International on Illumination color space values for L* (lightness), a* (red/green), and b* (yellow/blue) were obtained from each evaluated side. Examiner 2 repeated the measurements of the same subjects under different light conditions (i.e., a dental unit with a chairside lamp). To describe measurement precision, the mean color difference from the mean metric was used. The computed confidence interval (CI) value 5.228 (4.6598-5.8615) reflected (represented) the validity of the measurements. Least square mean analysis of the values obtained by examiners 1 and 2 or under different illumination conditions revealed no statistically significant differences (CI = 95%). Within the limits of the present study, the accuracy and reproducibility of dental shade selection using the tested spectrophotometer with respect to examiner and illumination conditions reflected the reliability of this device. This study suggests that the tested spectrophotometer can be recommended for the clinical application of shade selection.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Reliability of shade selection using an intraoral spectrophotometer

et al. 2011

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“…The factor of the region of the prosthesis veneer facing was shown to be the most significant. Many researchers have evaluated the reproducibility of prostheses made from porcelain and/or zirconia, and reported that dental laboratories were better at matching shades in the incisal region of the crown than those in the cervical and body regions [15][16][17]. In this study, however, the incisal region exhibited the greatest ∆E* value.…”

Section: Discussionmentioning

confidence: 59%

“…For example, Yilmaz et al reported that the replication of high-value shades was observed to be reliable [9], and Lagouvardos et al indicated that some shades produced a more reliable and valid match than others regardless of the brightness [14]. Other factors such as the region of the crown [15][16][17] and the type of shade guide used to select the color in the dental office and in the dental laboratory [2,13,14,[18][19][20] have also been reported to be related.…”

Section: Introductionmentioning

confidence: 99%

Factors Affecting Color Reproducibility of Resin-veneered Prostheses

Ikoma¹,

Tanoue²,

Fujiwara³

et al. 2016

IOSR

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“…Their technology allow to convert perception in numbers, thus making colour selection and colour communication in dentistry easier and more reliable. [2][3][4][5][6][7][8][9] Although clinical spectrophotometers are still under evaluation, they have so far provided satisfactory results and have the potential to greatly simplify the first step in the colour matching procedure, i.e. colour selection.…”

Section: Introductionmentioning

confidence: 99%