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International Journal of Periodontics & Restorative Dentistry
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Int J Periodontics Restorative Dent 38 (2018), Supplement     28. Aug. 2018
Int J Periodontics Restorative Dent 38 (2018), Supplement  (28.08.2018)

Supplement, Page 113-118, doi:10.11607/prd.3270, PubMed:29677224


Dental Shade Guide Variability for Hues B, C, and D Using Cross-Polarized Photography
Sampaio, Camila S. / Gurrea, Jon / Gurrea, Marta / Bruguera, August / Atria, Pablo J. / Janal, Malvin / Bonfante, Estevam A. / Coelho, Paulo G. / Hirata, Ronaldo
This study evaluated the color variability of hues B, C, and D between the VITA Classical shade guide (Vita Zahnfabrik) and four other VITA-coded ceramic shade guides using a digital camera (Canon EOS 60D) and computer software (Adobe Photoshop CC). A cross-polarizing filter was used to standardize external light sources influencing color match. A total of 275 pictures were taken, 5 per shade tab, for 11 shades (B1, B2, B3, B4, C1, C2, C3, C4, D2, D3, and D4), from the following shade guides: VITA Classical (control); IPS e.max Ceram (Ivoclar Vivadent); IPS d.SIGN (Ivoclar Vivadent); Initial ZI (GC); and Creation CC (Creation Willi Geller). Pictures were evaluated using Adobe Photoshop CC for standardization of hue, chroma, and value between shade tabs. The VITA-coded shade guides evaluated here showed an overall unmatched shade in all their tabs when compared to the control, suggesting that shade selection should be made with the corresponding manufacturer guide of the ceramic intended for the final restoration.