Influence of manufacturing technique on the color of zirconia restorations: Monolithic versus layered crowns

Objectives The study aimed to compare the color of monolithic and layered zirconia crowns fabricated using different brands in the cervical, middle, and incisal areas. Materials and Methods A total of 45 crowns were fabricated from three brands (Katana, Nacera, Cercon) using three methods (monolithi...

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Bibliographic Details
Published in:Journal of esthetic and restorative dentistry 2022-09, Vol.34 (6), p.978-987
Main Authors: Manziuc, Manuela Maria, Gasparik, Cristina, Burde, Alexandru Victor, Ruiz‐López, Javier, Buduru, Smaranda, Dudea, Diana
Format: Article
Language:English
Subjects:
Color
crown
Dental crowns
Dental enamel
Enamel
layering
Manufacturing
monolithic
Optical properties
Zirconia
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Summary:Objectives The study aimed to compare the color of monolithic and layered zirconia crowns fabricated using different brands in the cervical, middle, and incisal areas. Materials and Methods A total of 45 crowns were fabricated from three brands (Katana, Nacera, Cercon) using three methods (monolithic = ML (n=5), cut‐back + enamel = BL (n=5), cut‐back + dentin + enamel = TL (n=5)). CIE L*, a* b*, C*, h° color coordinates were recorded with a dental spectrophotometer in cervical, middle, and incisal areas. Color differences between manufacturing techniques, tooth areas, and brands were calculated using the CIEDE2000(1:1:1) formula, and the values were compared to the perceptibility (PT00) and acceptability thresholds (AT00). Comparisons between color coordinates were analyzed statistically (Kruskal‐Wallis and Mann‐Whitney U tests, p < 0.001). Results Significant differences were found between CIE L*, a*, b*, C*, h° coordinates of the zirconia crowns (p 
ISSN:1496-4155
1708-8240
DOI:10.1111/jerd.12897