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Translucency and masking properties of two ceramic materials for heat‐press technology
Author(s) -
Șoim Alexandra,
Strîmbu Maria,
Burde Alexandru V.,
Culic Bogdan,
Dudea Diana,
Gasparik Cristina
Publication year - 2018
Publication title -
journal of esthetic and restorative dentistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.919
H-Index - 60
eISSN - 1708-8240
pISSN - 1496-4155
DOI - 10.1111/jerd.12358
Subject(s) - ceramic , color difference , masking (illustration) , dental ceramics , materials science , significant difference , background color , dentistry , composite material , dental porcelain , mathematics , optics , medicine , physics , computer science , cubic zirconia , art , statistics , artificial intelligence , enhanced data rates for gsm evolution , visual arts
Objectives To assess the translucency of two pressable ceramics and to analyze their masking property when placed on different tooth‐shaded backgrounds. Materials and methods Thirty discs (1‐mm thickness) were fabricated using two pressable ceramics (shade/translucency): 1M1T/HT, 1M2T/HT, 2M2T (VITA PM9), and A1LT/HT, B1LT/HT, A2LT (e.max Press). Color measurements of discs were performed with a dental spectrophotometer on tooth‐colored backgrounds (A1/A2/A3/A3.5/A4), and black and white backings. The masking property was calculated as the color difference (CIEDE2000) between parameters of discs on control (A1, A2) and test backgrounds (A3, A3.5, A4). One‐way ANOVA was used for assessing differences in translucency parameter (TP) between ceramics. Two‐way ANOVA was used for detecting differences among groups when measured over tooth‐shaded backgrounds (α = 0.05, Bonferroni correction). Results TP ranged between 14.96 (B1LT) and 25.18 (1M1HT). A significant difference in TP was found between tested ceramics ( F = 949.949, P < .001). However, TP did not vary significantly between 1M1HT and 1M2HT ( P > .05), 1M1T, A1HT and B1HT ( P > .05), 1M2T, 2M2T, and A2HT ( P > .05). A significant interaction effect of underlying background on color of ceramic discs was found ( F = 107.994, P < .001). Conclusion VITA PM9 demonstrated higher translucency than e.max Press ceramics. Except A1LT, all ceramic materials evaluated showed poor masking properties on A4 background. Clinical Significance Highly translucent ceramics should be wisely used for restoring the appearance of dental structures since background color has a large effect upon these materials. The more recently introduced pressable ceramics showed high levels of translucency.