Accuracy of an intraoral digital scanner in tooth color determination

Rutkūnas, Vygandas; Dirse, Julius; Bilius, Vytautas

doi:10.1016/j.prosdent.2018.12.020

Cited by 41 publications

(81 citation statements)

References 24 publications

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“…However, zero lighting conditions (0‐lx illuminance) obtained more consistent results with dental spectrophotometer being used as a control. Previous studies have analyzed the shade matching potential of IOSs; however, the lighting conditions at which the digital scans were performed were not reported; 46‐52 therefore, comparisons with previous published data is not feasible. In the knowledge of the authors, there is no previous information regarding the impact of lighting conditions when the tooth shade matching is done using an IOS.…”

Section: Discussionmentioning

confidence: 99%

“…The incorporation of intraoral scanners (IOS) in restorative workflow provides a new digital tool to assess tooth color 46‐52 . Evaluation of shade matching accuracy of IOSs reveals inconsistent results regarding the tooth color accuracy and reliability compared with other color measurement devices 46‐52 . However, none of these studies have highlighted the ambient lighting conditions 53‐55 at which the shade selection was performed using IOSs.…”

Section: Introductionmentioning

confidence: 99%

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Impact of the ambient light illuminance conditions on the shade matching capabilities of an intraoral scanner

Revilla‐León

Methani

Özcan

2020

J Esthet Restor Dent

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Purpose To compare the shade matching capabilities between an intraoral scanner (IOS) and a spectrophotometer under different ambient light illuminance conditions. Material and methods The shade of three teeth of a patient was obtained using an IOS (IOS group) (TRIOS 3; 3Shape) and a spectrophotometer (DS group) (EasyShade V; Vita Zahnfabrik) at 4 ambient illuminances: 10000‐, 1000‐, 500‐, and 0‐lx. Ten shade measurements were documented using Vita Classical and 3D‐Master guides per tooth at each lighting condition. Data was analyzed using the Kruskal‐Wallis and Mann Whitney U tests (α = .05). Results Significant shade discrepancies were obtained between the groups in different lighting conditions (P < .05). The IOS group presented significant shade discrepancies in different lighting conditions when evaluated using either shade guide, with lower variation under the 0‐lx condition. However, the DS group did not present significant shade discrepancies among the different lighting conditions with either shade guide, except for the maxillary lateral incisor measured under 10 000‐lx condition using the 3D‐Master guide. Conclusions Lighting conditions influenced the shade matching competency of an IOS. The IOS tested obtained high variation in the different lighting conditions evaluated and provided a lower shade value than the spectrophotometer. The spectrophotometer revealed high consistency amongst the various lighting conditions evaluated. Clinical implications Ambient light illuminance conditions can impact the shade matching capabilities of IOSs. The results of this investigation suggest the use of a supplementary instrumental method for assessment of tooth shade.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Impact of the ambient light illuminance conditions on the shade matching capabilities of an intraoral scanner

Revilla‐León

Methani

Özcan

2020

J Esthet Restor Dent

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“…The coverage error favors the 3D system, although it is unclear, whether the difference between the 2D and 3D system is clinically relevant [10,12,[55][56][57]. The accuracy of the measurement of tooth shade obtained with an intraoral digital scanner was higher when the color was recorded as 3D Master values rather than VC values, whereas a visually perceptible color difference was found more often for VC values [58].…”

Section: D and 3d Systemmentioning

confidence: 99%

New insights in the reproducibility of visual and electronic tooth color assessment for dental practice

Ratzmann

Welk

Hoppe³

et al. 2020

Preprint

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Background The aim of the study was to compare a 2D and 3D color system concerning a variety of statistical and graphical methods to assess validity and reliability of color measurements, and to give some guidance when to use which system and how to interpret color distance measures, including ΔE and d(0M1).Methods The tooth color of teeth 14 to 24 of 35 patients with a regular bleaching treatment (BT) was visually assessed and electronically measured with the spectrophotometer Shade Inspector™. Tooth color was recorded before BT (T1/T2- Baseline), 14d (T3/T4) and 6 months (T5/T6) after BT. VITAPAN® Classical (VC) and VITA-3D-Master® (3D) served as reference systems.Results Intra-rater variability. The 2D system is better than the 3D system both visually and electronically in terms of ΔE and d(0M1) for statistics of agreement and reliability. All four methods show strong patterns of disagreement between repeated measurements in Bland-Altman plots. The 3D system lacks reliability of hue compared with that of lightness and chroma, which is more pronounced visually than electronically. The smallest detectable color difference (SDCD) differs by the four methods used and is most favorable in the electronical 2D system. Inter-rater variability. The agreement between the 2D and 3D system in terms of ΔE is not good according to Byrt’s classification. It is lower within the electronical method than within the visual method. Comparability of the 2D and 3D system is uncertain because confidence intervals of ICCs accounting for systematic error are wide. The systematic error between the 2D and 3D system cannot be neglected. The reliability of the visual and electronical method is substantially the same within the 2D and 3D system; this comparability is fair to good.Clinical Relevance: According to the results of this study, the 3D system may confuse human raters and even electronical devices. The 2D system is the natural and best choice.

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“…As a result, the cervical color is better differentiated from the color in the middle, while the incisal edges transmit the background color. However, the gingiva in the cervical region may discolor the teeth by scattering the reflected light [4] . Tooth color selection methods can be classified into two categories: visual and instrumental methods [5,6] .…”

Section: Introductionmentioning

confidence: 99%

Relation in color of three regions of human maxillary incisors and canines

Karabaş¹,

Manav²,

Kamalak³

2021

Int. J. Appl. Dent. Sci.

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The aim of this study was to evaluate relations between color distributions in the cervical, middle, and incisal segments of the teeth in the anterior region. Material and Method: Thirty-one individuals aged between 18-24 participated in the study. Color measurements were performed using VITA Easyshade V (VITA Zahnfabrik, Germany) from the cervical, middle and incisal regions of the left upper central, lateral, and canine teeth of participants. L*, a*, b* values were determined using a spectrophotometer. ΔE values were calculated to determine the color difference, and L*, a*, b * values were statistically analyzed. Results: Statistically significant results were obtained between L*, a*, b* values of different teeth segments using Spearman's correlation analysis. ΔE was calculated higher than 3.7 among all teeth segments. Conclusions: Using the L* and b* values of the middle segment color of the upper lateral tooth, it is possible to calculate the L* and b* values of the incisal, middle, and cervical colors of the upper incisors and canines.

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Accuracy of an intraoral digital scanner in tooth color determination

Cited by 41 publications

References 24 publications

Impact of the ambient light illuminance conditions on the shade matching capabilities of an intraoral scanner

Impact of the ambient light illuminance conditions on the shade matching capabilities of an intraoral scanner

New insights in the reproducibility of visual and electronic tooth color assessment for dental practice

Relation in color of three regions of human maxillary incisors and canines

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