Shade selection performed by novice dental professionals and colorimeter

Klemetti, Esa; Matela, Anna-Maija; Haag, Per; Könönen, Mauno

doi:10.1111/j.1365-2842.2006.01531.x

Cited by 62 publications

(64 citation statements)

References 11 publications

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“…In those studies, the studied material was the tooth brightness and translucency after vital bleaching using L* and RGB values. In earlier studies, intraoral colorimeters have provided accurate and repeatable measurements compared with conventional visual shade selection since the resolution of digital colorimeters is above that of a human eye [8,9,16,21,22]. Since standard shade guides without complicated colour blends [17] were used in this study, the results with the colorimeter were consistent, but b* values with the ceramic shade guides were higher with the colorimeter.…”

Section: Discussionsupporting

confidence: 72%

“…Unfortunately, common shade guides do not provide sufficient spectral coverage of the colours present in teeth [10,12,14]. In fact, spectrophotometric/colorimetric approach is attractive so it is more commonly used in dentistry, eliminating possible environmental viewing conditions and examiner's experience [11,[14][15][16][17]. On the other hand, computer analysis of digital images produced through a digital camera also enables collection of colour values from the images [9,18,19].…”

Section: Introductionmentioning

confidence: 99%

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Could digital imaging be an alternative for digital colorimeters?

et al. 2009

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This study evaluated the colour parameters of composite and ceramic shade guides determined using a colorimeter and digital imaging method with illuminants at different colour temperatures. Two different resin composite shade guides, namely Charisma (Heraeus Kulzer) and Premise (Kerr Corporation), and two different ceramic shade guides, Vita Lumin Vacuum (VITA Zahnfabrik) and Noritake (Noritake Co.), were evaluated at three different colour temperatures (2,700 K, 2,700-6,500 K, and 6500 K) of illuminants. Ten shade tabs were selected (A1, A2, A3, A3,5, A4, B1, B2, B3, C2 and C3) from each shade guide. CIE Lab values were obtained using digital imaging and a colorimeter (ShadeEye NCC Dental Chroma Meter, Shofu Inc.). The data were analysed using two-way ANOVA, and Pearson's correlation. While mean L* values of both composite and ceramic shade guides were not affected from the colour temperature, L* values obtained with the colorimeter showed significantly lower values than those of the digital imaging (p<0.01). At combined 2,700-6500 K colour temperature, the means of a* values obtained from colorimeter and digital imaging did not show significant differences (p>0.05). For both composite and ceramic shade guides, L* and b* values obtained from colorimeter and digital imaging method presented a high level of correlation. High-level correlations were also acquired for a* values in all shade guides except for the Charisma composite shade guide. Digital imaging method could be an alternative for the colorimeters unless the proper objectcamera distance, digital camera settings and suitable illumination conditions could be supplied. However, variations in shade guides, especially for composites, may affect the correlation.

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Section: Discussionsupporting

confidence: 72%

Section: Introductionmentioning

confidence: 99%

Could digital imaging be an alternative for digital colorimeters?

et al. 2009

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“…Studies have been conducted that evaluated the reliability of computer-based instruments. [4][5][6] However, few studies have compared these instruments with human color perception under clinical conditions. The current study compared the intrarater agreement for three human evaluators and an intraoral spectrophotometer using the Vitapan 3D-Master system.…”

Section: Introductionmentioning

confidence: 99%

A Comparison of Human Raters and an Intra-oral Spectrophotometer

Browning¹,

Chan²,

Blalock

et al. 2009

Operative Dentistry

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Clinical RelevanceUsing the Vita 3D-Master shade guide, the accuracy of three experienced clinicians was compared to shade choices using an intraoral spectrophotometer. Compared to the clinicians, the shades chosen by the Easyshade guide were more frequently an exact match. This study indicates shade matching may be improved by using an electronic device. SUMMARYConsistently choosing an accurate shade match is far more difficult than it appears. Recently, several electronic shade-matching devices have been marketed. One device is an intraoral spectrophotometer, Easyshade. The current study compared the accuracy and consistency of the Easyshade (ES) device to three clinicians experienced in tooth whitening trials and trained in the use of the Vitapan 3D Master shade.The maxillary anteriors of 16 participants were matched on three separate occasions one month apart. At each appointment, the three clinicians (R1, R2 & R3) and ES independently chose a single 3D Master tab. A trained research assistant used the Easyshade device to record CIE L*, C* and H* and a shade tab. In addition, color differences between shade tabs were calculated using the Delta E 2000 (∆ e 00) formula. The CIE L*C*H* data were also used to establish standards for the five lightness groups of the 3D Master. An intrarater agreement was evaluated using an intraclass correlation statistic, and an inter-rater agreement was evaluated using a weighted Kappa statistic.The percentages of exact matches were: ES = 41%; R1 = 27%; R2 = 22% and R3 = 17%. Matches within a half-shade were also calculated. This represents a mismatch that is perceptible but acceptable. The percentages of matches within a half-tab were: ES = 91%; R1 = 69%; R2 = 85% and R3 = 79%. In terms of lightness, the intra-rater The mean color difference for the L*, C*, H* data recorded at each evaluation was 1.5, or only slightly greater than the color difference between the same tab on different guides (1.2). The ∆ e 00 data were the most accurate data collected, and they were used to establish a standard to which the tab choices of the four raters were compared. A weighted Kappa statistic was performed and, in terms of lightness, agreement was found to be good for all raters. For chroma, agreement was very good for ES and it was good for the clinicians.In terms of the number of exact matches and matches within a half-shade, the performance of ES was at least comparable to, if not better than, the dentists. Statistically, the same was true in terms of consistency and accuracy when making repeated matches of lightness and chroma using the 3D Master shade guide.

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“…Agreement with the colorimetric results was low (8% -34%). They propose that the digital colorimeters may be a useful educational tool [22].…”

Section: Discussionmentioning

confidence: 99%

The Color of Natural Teeth Investigated by Visual Perception and Spectrophotometer

Pustina-Krasniqi¹,

Bytyci²,

Bicaj³

et al. 2015

OJST

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The advantage of electronic devices is to eliminate the subjectivity. Based on individual capabilities, visual perception has its disadvantages. The aim of this study was to find out the possible shade difference between the upper and lower teeth, visual perception versus spectrophotometry as well as proving that females are better in visual perception of colour matching. 82 subjects (dental students) of this study determined the color of each other's natural teeth. The color of 1640 teeth (incisors, canines and premolars), was matched by visual perception and by Vita Easyshade spectrophotometer. The matching was focused on the middle third of buccal surfaces of the examined teeth. In this study, it was found that there was a difference of color between the teeth of the upper and lower jaw. The percentage of the accordance between two methods was 28.35% for all examined teeth. The color determination at central incisors showed the highest value of accordance 40.85%. Based on Vitapan 3D Mastershade, the most frequent color was 2M2.

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Shade selection performed by novice dental professionals and colorimeter

Cited by 62 publications

References 11 publications

Could digital imaging be an alternative for digital colorimeters?

Could digital imaging be an alternative for digital colorimeters?

A Comparison of Human Raters and an Intra-oral Spectrophotometer

The Color of Natural Teeth Investigated by Visual Perception and Spectrophotometer

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