Dental operatory lighting and tooth color discrimination

Bergen, Stephen F.; McCasland, John P.

doi:10.14219/jada.archive.1977.0264

Cited by 24 publications

(20 citation statements)

References 1 publication

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“…2,4 In this study visual shade matching was done by both the clinicians and the subjects independently, following a standard procedure under controlled viewing conditions. 19,[21][22][23] To standardize light conditions, color-corrected light was used, in which almost full spectrum light could be displayed. To maintain luminosity level and help conserve energy, all major reflecting surfaces, in the area of the shade selection, should be of high value, 10 so a light grey wall was used as a back ground where the subject was seated.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of self shade matching ability of dental students using visual and instrumental means

Al-Saleh

Labban

AlHariri

et al. 2012

Journal of Dentistry

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Section: Discussionmentioning

confidence: 99%

Evaluation of self shade matching ability of dental students using visual and instrumental means

Al-Saleh

Labban

AlHariri

et al. 2012

Journal of Dentistry

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“…The results of some studies have shown a notable difference in correct shade selection under ideal lighting conditions. 9,23,24 Nevertheless, even the use of the ideal type of lighting does not guarantee precise shade matching, because the environment is not free of the natural light coming through the workroom window and mixing with the artificial light. 3 The problems of shade perception are more common than one imagines and have different causes and variations.…”

Section: Discussionmentioning

confidence: 99%

“…This could have been replaced by standardized corrected light to verify whether this parameter is essential in pairing the shades, because in order to discriminate colors, this is known to be essential. 9,19,[23][24][25] From analysis of the data in the literature and the results of the current study, any type of formula for transmitting data to the laboratory is with error, because there are a series of factors, both biological and technical, that must be considered when shade perception is involved. It is proposed that, irrespective of gender, professionals should consider getting a second opinion in shade selection in order to obtain more reliable results.…”

Section: Discussionmentioning

confidence: 99%

“…All the tests were performed on the premises of the Sã o Leopoldo Mandic Postgraduation Center (Campinas, SP, Brazil) under the clinical lighting conditions that exist at the patient chair (fluorescent and natural light that comes through the window of the room) because it was the type of lighting most commonly found in dental offices and prosthesis laboratories. [23][24][25][26] To analyze the association between the variables, the v 2 and Fisher exact tests were applied, adopting 5% as the level of statistical significance. Furthermore, an analysis of risk was performed, comparing the risk of wrong choices between the genders, among students with different levels of clinical experience, and between shades by the construction of intervals of confidence at a 95% probability.…”

Section: Methodsmentioning

confidence: 99%

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Effect of Gender, Experience, and Value on Color Perception

Milagres

Teixeira²,

Miranda³

et al. 2012

Operative Dentistry

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Clinical RelevanceAs a result of variations in accurate shade perception, considerations should be given to using multiple opinions to compensate for errors caused by gender or inexperience, especially when lighter shades are involved. SUMMARYStatement of the Problem: Precise shade matching can be one of the most difficult tasks for the dentist and some variables may influence the process of shade comparison.Purpose of the Study: This study tested the differences in shade perception between genders, the influence of the observer's clinical experience, and the value of ceramics in correct shade selection. Results: The results indicated that there were statistical differences among gender, clinical experience, and shades in discriminating ceramics.Conclusions: Men and observers with more clinical experience were more successful in discriminating shades, although darker shades were selected more correctly than the lighter ones.

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“…12-14 Moreover, shade tab colors may not be distributed uniformly throughout the color space of natural teeth, resulting in close matches for some shades and gross mismatches for others. 15 Preston and Miller 16,17 stated many of the errors associated with the use of commercial shade guides and indicated a lack of red shades based on spectrophotometric measurements of extracted teeth reported by Sproull. 18 When the natural tooth color was evaluated with shade guides, the most frequently chosen shades were of reddish brown hues A3 and A2.…”

Section: Discussionmentioning

confidence: 99%

Coverage error of three conceptually different shade guide systems to vital unrestored dentition

Bayındır

Kuo

Johnston

et al. 2007

The Journal of Prosthetic Dentistry

112

106

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Statement of problem-It remains unclear which shade guide system is most representative of the shades found in the human dentition.Purpose-The purpose of this study was to determine and to compare the coverage errors (CEs) of 3 different shades in a selected population.Material and methods-The coverage errors of the following shade guide systems were evaluated to determine which shade guide system is most effective in producing the best visual shade match: (1) Vita Lumin, (2) Chromascop, (3) Vitapan 3D Master, and (4) a combination of the 3 shade guide systems. The spectral reflectance values of the central one ninth (1-mm diameter) of each shade tab (without a backing) were measured with a spectroradiometer and an external light source at wavelengths from 380 nm to 780 nm at 2-nm intervals. All spectral reflectance measurements were made using 0-degree observer and 45-degree illumination and then converted to CIE values. The color values of 359 anterior teeth were measured with the same protocol. The CEs for each of the 359 anterior teeth for each shade guide system, and with all 3 shade guide systems, were determined and averaged. Repeated measure ANOVA was used to evaluate the mean minimum CEs withinsubject (shade guide system) and between-subject (age) difference as well as the interaction between these variables (α=.05). Then, a post hoc multiple comparison was performed using the TukeyKramer test.Results-A significant difference (P<.001) was found among the mean minimum CEs of the 3 shade guide systems and their combination, but not between age groups (P=.384). An interaction was found between shade guide systems and age (P<.001). The Tukey-Kramer test revealed that the mean minimum CEs for Vita Lumin (5.39 ΔE) and Chromoscop (5.28 ΔE) shade guide systems were not significantly different from each other. However, the combination of all 3 shade guide systems (3.69 ΔE) and Vitapan 3D Master (3.93 ΔE) were significantly different from the Vita Lumin and Chromoscop shade guide system. The rankings of the shade guide systems within each age group were similar between the age groups. Clinical ImplicationsThe Vitapan 3D Master shade guide system provides a high potential for a good visual shade match compared to the Vita Lumin or Chromascop shade guide systems. The use of the Vita 3D Master shade guide system alone is as effective as using a combination of Vitapan 3D Master, Vita Lumin, and Chromascop shade guide systems.In restorative dentistry, the clinician commonly encounters the challenge of replicating the color of natural teeth. The goal of an esthetic restoration is to achieve morphological, optical, and biological beauty which results in social acceptance. 1,2 Clinically, the color replication process for dental porcelain consists of shade selection followed by the shade duplication phase. Shade selection can be made using either visual assessment or instrumental color analysis. 3 Although the most popular and traditional method of shade selection in dentistry is through the use of visual select...

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Dental operatory lighting and tooth color discrimination

Cited by 24 publications

References 1 publication

Evaluation of self shade matching ability of dental students using visual and instrumental means

Evaluation of self shade matching ability of dental students using visual and instrumental means

Effect of Gender, Experience, and Value on Color Perception

Coverage error of three conceptually different shade guide systems to vital unrestored dentition

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