Comparative Analysis of Translucency in Different Thicknesses of Monolithic Zirconia Crowns
ABSTRACT Objectives Achieving optimal esthetics in dental restorations remains challenging, particularly with zirconia crowns, which, despite their durability, often exhibit less translucency than natural teeth. This study aimed to evaluate how varying thicknesses of monolithic zirconia crowns affec...
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Wiley
2025-04-01
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| Series: | Clinical and Experimental Dental Research |
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| Online Access: | https://doi.org/10.1002/cre2.70132 |
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| author | Azita Mazaheri Ezatollah Jalalian Arash Zarbakhsh Mahshad Mazidabadi Farahani Maryam Sayyari |
| author_facet | Azita Mazaheri Ezatollah Jalalian Arash Zarbakhsh Mahshad Mazidabadi Farahani Maryam Sayyari |
| author_sort | Azita Mazaheri |
| collection | DOAJ |
| description | ABSTRACT Objectives Achieving optimal esthetics in dental restorations remains challenging, particularly with zirconia crowns, which, despite their durability, often exhibit less translucency than natural teeth. This study aimed to evaluate how varying thicknesses of monolithic zirconia crowns affect their translucency. Materials and Methods In this experimental laboratory study, an initial model (a brass die) was scanned, and two dies, one black (9005 RAL), and one white (9010 RAL), were created from Resin according to the scanned file. Next, 30 zirconia crowns (ZrO2, Arum, High Translucent) were fabricated in three thicknesses: 0.5, 0.8, and 1.5 mm. The color and translucency of the samples were assessed under standard lighting conditions (D65) using a spectroradiometer, and the color parameters L*, b*, and a* were recorded. The translucency of each sample was measured using the CIEDE2000 and CIE‐Lab formulae. Data were analyzed using one‐way ANOVA and the Tamhane test. Results Statistically significant changes in the color and translucency of the samples were observed with varying thicknesses (p < 0.001). Specifically, the translucency parameter (TP), L*, and b* values decreased as the thickness increased, whereas a* values remained relatively stable. The average TP values for CIE‐Lab ranged from 11.51 at 0.5 mm to 6.54 at 1.5 mm, and for CIEDE2000, they ranged from 8.19 at 0.5 mm to 4.82 at 1.5 mm. Conclusion Within the limitations of this in vitro study, it can be concluded that reducing the thickness of monolithic zirconia restorations increases their translucency. Thinner zirconia restorations demonstrate a higher TP, which may offer improved esthetic integration in clinical applications. |
| format | Article |
| id | doaj-art-54517d1823df484c8ce5332e7cb5ee09 |
| institution | OA Journals |
| issn | 2057-4347 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Wiley |
| record_format | Article |
| series | Clinical and Experimental Dental Research |
| spelling | doaj-art-54517d1823df484c8ce5332e7cb5ee092025-08-20T02:12:20ZengWileyClinical and Experimental Dental Research2057-43472025-04-01112n/an/a10.1002/cre2.70132Comparative Analysis of Translucency in Different Thicknesses of Monolithic Zirconia CrownsAzita Mazaheri0Ezatollah Jalalian1Arash Zarbakhsh2Mahshad Mazidabadi Farahani3Maryam Sayyari4Department of Prosthodontics, Dental Branch Islamic Azad University Tehran IranDepartment of Prosthodontics, Dental Branch Islamic Azad University Tehran IranDepartment of Prosthodontics, Dental Branch Islamic Azad University Tehran IranDepartment of Prosthodontics, Dental Branch Islamic Azad University Tehran IranTehran University of Medical Sciences Tehran IranABSTRACT Objectives Achieving optimal esthetics in dental restorations remains challenging, particularly with zirconia crowns, which, despite their durability, often exhibit less translucency than natural teeth. This study aimed to evaluate how varying thicknesses of monolithic zirconia crowns affect their translucency. Materials and Methods In this experimental laboratory study, an initial model (a brass die) was scanned, and two dies, one black (9005 RAL), and one white (9010 RAL), were created from Resin according to the scanned file. Next, 30 zirconia crowns (ZrO2, Arum, High Translucent) were fabricated in three thicknesses: 0.5, 0.8, and 1.5 mm. The color and translucency of the samples were assessed under standard lighting conditions (D65) using a spectroradiometer, and the color parameters L*, b*, and a* were recorded. The translucency of each sample was measured using the CIEDE2000 and CIE‐Lab formulae. Data were analyzed using one‐way ANOVA and the Tamhane test. Results Statistically significant changes in the color and translucency of the samples were observed with varying thicknesses (p < 0.001). Specifically, the translucency parameter (TP), L*, and b* values decreased as the thickness increased, whereas a* values remained relatively stable. The average TP values for CIE‐Lab ranged from 11.51 at 0.5 mm to 6.54 at 1.5 mm, and for CIEDE2000, they ranged from 8.19 at 0.5 mm to 4.82 at 1.5 mm. Conclusion Within the limitations of this in vitro study, it can be concluded that reducing the thickness of monolithic zirconia restorations increases their translucency. Thinner zirconia restorations demonstrate a higher TP, which may offer improved esthetic integration in clinical applications.https://doi.org/10.1002/cre2.70132ceramicscolordental materialsdental porcelain |
| spellingShingle | Azita Mazaheri Ezatollah Jalalian Arash Zarbakhsh Mahshad Mazidabadi Farahani Maryam Sayyari Comparative Analysis of Translucency in Different Thicknesses of Monolithic Zirconia Crowns Clinical and Experimental Dental Research ceramics color dental materials dental porcelain |
| title | Comparative Analysis of Translucency in Different Thicknesses of Monolithic Zirconia Crowns |
| title_full | Comparative Analysis of Translucency in Different Thicknesses of Monolithic Zirconia Crowns |
| title_fullStr | Comparative Analysis of Translucency in Different Thicknesses of Monolithic Zirconia Crowns |
| title_full_unstemmed | Comparative Analysis of Translucency in Different Thicknesses of Monolithic Zirconia Crowns |
| title_short | Comparative Analysis of Translucency in Different Thicknesses of Monolithic Zirconia Crowns |
| title_sort | comparative analysis of translucency in different thicknesses of monolithic zirconia crowns |
| topic | ceramics color dental materials dental porcelain |
| url | https://doi.org/10.1002/cre2.70132 |
| work_keys_str_mv | AT azitamazaheri comparativeanalysisoftranslucencyindifferentthicknessesofmonolithiczirconiacrowns AT ezatollahjalalian comparativeanalysisoftranslucencyindifferentthicknessesofmonolithiczirconiacrowns AT arashzarbakhsh comparativeanalysisoftranslucencyindifferentthicknessesofmonolithiczirconiacrowns AT mahshadmazidabadifarahani comparativeanalysisoftranslucencyindifferentthicknessesofmonolithiczirconiacrowns AT maryamsayyari comparativeanalysisoftranslucencyindifferentthicknessesofmonolithiczirconiacrowns |