Back

Volume 36 , Issue 5
September/October 2016
Pages e76–e81

Evaluation of Dental Shade Guide Variability Using Cross-Polarized Photography

Jon Gurrea, DDS/Marta Gurrea, CDT/August Bruguera, MDT/Camila S. Sampaio, DDS, MS/Malvin Janal, DDS, MS, PhD/Estevam Bonfante, DDS, MS, PhD/Paulo G. Coelho, DDS, MS, PhD/Ronaldo Hirata, DDS, MS, PhD

PMID: 27560681
DOI: 10.11607/prd.2700

This study evaluated color variability in the A hue between the VITA Classical (VITA Zahnfabrik) shade guide and four other VITA-coded ceramic shade guides using a Canon EOS 60D camera and software (Photoshop CC, Adobe). A total of 125 photographs were taken, 5 per shade tab for each of 5 shades (A1 to A4) 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). Photos were processed with Adobe Photoshop CC to allow standardized evaluation of hue, chroma, and value between shade tabs. None of the VITA-coded shade tabs fully matched the VITA Classical shade tab for hue, chroma, or value. The VITA-coded shade guides evaluated herein showed an overall unmatched shade in all tabs when compared with the control, suggesting that shade selection should be made using the guide produced by the manufacturer of the ceramic intended for the final restoration.

Full Text PDF File | Order Article

 

 

Adobe Acrobat Reader is required to view PDF files. This is a free program available from the Adobe web site.
Follow the download directions on the Adobe web site to get your copy of Adobe Acrobat Reader.