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Masking Ability of Translucent Monolithic Zirconia Ceramic: The Effect of Thickness |
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| รหัสดีโอไอ | |
| Creator | Mohd Zulkifli Kassim, Nor Wati Nur Atikah Mustafa, Rohana Ahmad, Siti Mariam Ab Ghani, Hazlina Abdul Ghani |
| Title | Masking Ability of Translucent Monolithic Zirconia Ceramic: The Effect of Thickness |
| Contributor | - |
| Publisher | TuEngr Group |
| Publication Year | 2564 |
| Journal Title | International Transaction Journal of Engineering, Management, & Applied Sciences & Technologies |
| Journal Vol. | 12 |
| Journal No. | 9 |
| Page no. | 12A9G: 1-9 |
| Keyword | Masking Ability, Monolithic Zirconia, Acceptable tolerance, Perceptible tolerance, Zirconia thickness, Discolored tooth, Crowns, Tooth color, White acrylic substrate, Opaque luting cement, Substrate, D4 shade composite resin substrate, Dark substrate. |
| URL Website | http://TuEngr.com/Vol12_9.html |
| Website title | ITJEMAST V12(9) 2021 @ TuEngr.com |
| ISSN | 2228-9860 |
| Abstract | The minimum thickness required of monolithic zirconia restorations to achieve sufficient masking ability for optimal aesthetics is unclear. Hence, this study investigates the minimum thickness required to achieve acceptable and perceptible tolerance thresholds by testing monolithic zirconia discs in various thicknesses from 0.4-2.0 mm on a D4 shade substrate using spectrophotometry. Delta-E (ΔE) was calculated and compared with the established acceptable (ΔE = 5.5) and perceptible (ΔE = 2.6) tolerance thresholds. There was a significant negative correlation between thickness and ΔE (R2 = 0.952, p < 0.001). The mean ΔE decreases from 13.43 (?0.34) to 3.07 (?0.03) as thickness increases from 0.4 to 2.0 mm. Significant differences in ΔE were detected when there was at least a 0.4 mm difference in thickness between the groups. An acceptable tolerance threshold was achieved with a minimum thickness of 1.4 mm, but the perceptible tolerance threshold was unachievable even at the maximum thickness of 2.0 mm. In conclusion, the masking ability of translucent monolithic zirconia reduces with decreasing thickness, and a minimum thickness of 1.4 mm is recommended for the acceptable masking ability of a dark substrate. |
