Abstract
Introduction High-translucence ceramics have been used increasingly. This study evaluated the biaxial flexural strength of different ceramics as a result of varying thicknesses. Materials and Methods Circular discs with varied thickness of 0.4, 0.6, 0.8, 1.0, 1.2, 1.4, 1.6, 1.8, and 2.0 mm were prepared from high-translucence yttria-partially stabilized zirconia (HTY-PSZ); Bruxzir® Anterior (Bc), and zirconia-reinforced lithium silicate (ZLS) including Celtra® DUO (Cc) and VITA Suprinity® (Vc) (n = 15 discs/group). Biaxial flexural strength (σ) was evaluated utilizing piston-on-three-balls in a testing machine at a speed of 0.5 mm/min. A scanning electron microscope (SEM) was used to determine the microscopic structure. ANOVA and multiple comparisons were analyzed for significant differences (a = 0.05). Results The mean ± sd value of σ (MPa) for thickness 0.4, 0.6, 0.8, 1.0, 1.2, 1.4, 1.6, 1.8, and 2.0 mm was 672.66 ± 107.54, 655.93 ± 93.98, 589.01 ± 63.63, 624.89 ± 87.08, 618.82 ± 83.36, 672.64 ± 84.61, 659.81 ± 122.89, 632.79 ± 92.54, and 657.86 ± 73.17, for Bc; 477.64 ± 88.23, 496.39 ± 86.36, 461.56 ± 57.00, 450.26 ± 86.60, 468.28 ± 83.65, 472.45 ± 53.63, 453.05 ± 72.50, 462.67 ± 47.57, and 535.28 ± 84.33, for Cc; and 500.97 ± 76.36, 506.70 ± 87.76, 557.82 ± 62.78, 543.76 ± 87.29, 507.53 ± 86.09, 502.46 ± 64.75, 557.70 ± 80.91, 527.04 ± 80.78, and 499.88 ± 57.35, for Vc. A significant difference in flexural strength was indicated among groups (p < 0.05). Bc was significantly stronger than Cc and Vc (p < 0.05). Varying thickness did not have a significant influence on strength (p > 0.05). SEM revealed a tight arrangement of crystals for Bc and needle-like crystals diffusing in glass for Vc and Cc. Conclusion Flexural strength of ceramics varied among types, but each retained strength equitably with varying thickness. HTY-PSZ was stronger than ZLS, but each was equally strong for thickness in the range of 0.4–2.0 mm.
Highlights
High-translucence ceramics have been used increasingly. is study evaluated the biaxial flexural strength of different ceramics as a result of varying thicknesses
Circular discs with varied thickness of 0.4, 0.6, 0.8, 1.0, 1.2, 1.4, 1.6, 1.8, and 2.0 mm were prepared from high-translucence yttria-partially stabilized zirconia (HTY-PSZ); Bruxzir® Anterior (Bc), and zirconia-reinforced lithium silicate (ZLS) including Celtra® DUO (Cc) and VITA Suprinity® (Vc)
This study aimed to compare the flexural strength of HTY-PSZ and ZLS concerning the difference in ceramic thickness. e null hypotheses were the difference in the type and thickness of monolithic ceramics would not lead to different flexural strengths
Summary
High-translucence ceramics have been used increasingly. is study evaluated the biaxial flexural strength of different ceramics as a result of varying thicknesses. A new lithiumbased glass-ceramic containing a thermodynamic stable lithium silicate (LS) crystal structure, comprising more lithium metasilicate crystalline structures, which included 10 wt% ZrO2, as a reinforcement structure, namely, zirconia reinforce lithium silicate (ZLS), was introduced by combining the high esthetic achievement of lithium disilicate glass-ceramic with the strengthening process from zirconia content [6,7,8], providing better esthetics than classical translucence Y-TZP [9, 10]. Is leads to confusion when clinicians are seeking appropriate guidelines for practice in ceramic restoration in terms of ceramic thickness, especially concerning HTY-PSZ and ZLS. There is a lack of information about the thickness of translucence monolithic e Scientific World Journal ceramic materials, especially HTY-PSZ and ZLS, that adequately assures strength for the trial process before cementation. This study aimed to compare the flexural strength of HTY-PSZ and ZLS concerning the difference in ceramic thickness. This study aimed to compare the flexural strength of HTY-PSZ and ZLS concerning the difference in ceramic thickness. e null hypotheses were the difference in the type and thickness of monolithic ceramics would not lead to different flexural strengths
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