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. 2025 Mar 14;13(3):130.
doi: 10.3390/dj13030130.

Effectiveness of Lighting Conditions on Shade Matching Accuracy Among Dental Students

Christina Perou  1 , Andrianos Petalas  1 , Michaella Stoupi  1 , Christina Hadjichristou  1
Affiliations

Effectiveness of Lighting Conditions on Shade Matching Accuracy Among Dental Students

Christina Perou et al. Dent J (Basel). .

Abstract

Background: In prosthodontics, achieving esthetic success requires precise shade matching of restorations to natural teeth. This study evaluated the shade-matching abilities of fourth-year dental students using different tools and conditions in laboratory (LB) and clinical (CL) settings. Methods: In the LB setting, students matched blinded shade tabs to the VITA classical shade guide under natural daylight (ND), artificial light (AL), and a polarized filter (PF). In the CL setting, they determined the shades of patients' central incisors using the same conditions. Participants also completed a questionnaire about their experience. Results: Quantitative analysis showed better shade matching in the LB setting, particularly with the PF (52% correct), compared to ND (50%) and AL (43%). In the CL setting, overall accuracy dropped to 32% across all conditions. No results were statistically significant. Qualitative feedback revealed that students found the spectrophotometer to have improved their accuracy and reliability compared to the ND and AL conditions. Conclusions: This study highlights the importance of incorporating technology as a validation tool in dental practice. Leveraging tools like spectrophotometers may enhance shade-matching accuracy, streamline processes, and improve patient satisfaction while balancing traditional methods with technological advancements.

Keywords: artificial light source; color; prosthodontics; shade matching; smile lite; spectrophotometer.

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Conflict of interest statement

The authors declare no conflicts of interest.

Figures

Figure 1
Figure 1
Set up of the laboratory part (LB) of the experiment. (a) Shade matching under natural daylight (b), under artificial light (c), and using the polarized filter (d).
Figure 2
Figure 2
Set up of the clinical part (CL) of the experiment. Shade matching under natural daylight (a), under artificial light (b), using the polarized filter (c), and validation using the spectrophotometer (d). Retractors were used only for photographic purposes.
Figure 3
Figure 3
Questionnaire for the qualitative assessment.
Figure 4
Figure 4
Pie charts of the answers of participants to the QR code-generated questionnaire.
See this image and copyright information in PMC

References

    1. Clary J.A., Ontiveros J.C., Cron S.G., Paravina R.D. Influence of light source, polarization, education, and training on shade matching quality. J. Prosthet. Dent. 2016;116:91–97. doi: 10.1016/j.prosdent.2015.12.008. - DOI - PubMed
    1. Igiel C., Lehmann K.M., Ghinea R., Weyhrauch M., Hangx Y., Scheller H., Paravina R.D. Reliability of visual and instrumental color matching. J. Esthet. Restor. Dent. 2017;29:303–308. doi: 10.1111/jerd.12321. - DOI - PubMed
    1. Rodrigues S., Shetty S.R., Prithviraj D.R. An evaluation of shade differences between natural anterior teeth in different age groups and gender using commercially available shade guides. J. Indian Prosthodont. Soc. 2012;12:222–230. doi: 10.1007/s13191-012-0134-9. - DOI - PMC - PubMed
    1. Pohlen B., Hawlina M., Šober K., Kopač I. Tooth Shade-Matching Ability Between Groups of Students with Different Color Knowledge. Int. J. Prosthodont. 2016;29:487–492. doi: 10.11607/ijp.4712. - DOI - PubMed
    1. Jouhar R. Comparison of Shade Matching Ability among Dental Students under Different Lighting Conditions: A Cross-Sectional Study. Int. J. Environ. Res. Public Health. 2022;19:11892. doi: 10.3390/ijerph191911892. - DOI - PMC - PubMed

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