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dc.contributor.authorGasparik, Cristina
dc.contributor.authorRuiz López, Javier
dc.identifier.citationGasparik, C... [et al.]. Masking Ability of Monolithic and Layered Zirconia Crowns on Discolored Substrates. Materials 2022, 15, 2233. []es_ES
dc.descriptionThis work was supported by a grant of the Romanian Ministry of Education and Research, CCCDI-UEFISCDI, project number PN-III-P2-2.1-PED-2019-2953, 334 PED/2020.es_ES
dc.description.abstractThere is scarce information on the colorimetric behavior of monolithic and layered zirconia crowns in combination with various abutment colors. This study evaluated the masking ability on discolored substrates of monolithic and layered zirconia crowns. Anterior crowns were fabricated using 3Y-TZP zirconia and layering ceramic and divided into three groups: monolithic (ML), bi-layer (BL), and tri-layer (TL). The crowns were placed over eleven substrates (ND1-ND9, zirconia, metal), and CIE L*, a*, b*, C*, and h degrees color coordinates were measured in the cervical, middle, and incisal areas with a spectrophotometer. Masking ability was calculated using the color difference formula, and values were interpreted according to the perceptibility and acceptability thresholds. Data were analyzed statistically (alpha = 0.001). The L* coordinate was not significantly different between BL and TL crowns, regardless of the measurement area or substrate (p >= 0.001). In the middle area, the L* coordinate of the ML group was statistically different from the BL and TL groups only for zirconia and metal substrates, while in the incisal area, only for ND7 and metal substrates. The a* coordinate was significantly different between the ML and layered crowns for all measurement areas and substrates (except zirconia). The b* and C* coordinates differed significantly between the groups only in the cervical area (p < 0.001). The ML crown had better masking ability than the BL and TL crowns. However, the color differences for ML crowns were below the acceptability threshold for ND2, ND3, and ND7 substrates in the cervical and middle areas and below perceptibility threshold only for the incisal area. The lowest masking ability of the crowns was found for ND9 and metal substrates in all measurement areas.es_ES
dc.description.sponsorship(CNCS) Unitatea Executiva pentru Finantarea Invatamantului Superior, a Cercetarii, Dezvoltarii si Inovarii (UEFISCDI) PN-III-P2-2.1-PED-2019-2953 334 PED/2020es_ES
dc.rightsAtribución 3.0 España*
dc.subjectColor es_ES
dc.subjectMasking abilityes_ES
dc.titleMasking Ability of Monolithic and Layered Zirconia Crowns on Discolored Substrateses_ES

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Atribución 3.0 España
Except where otherwise noted, this item's license is described as Atribución 3.0 España