Comparison of Translucency and Flexural Strength of Zirconia Reinforced Lithium Silicate, Zirconia and Lithium Disilicate

Authors : Merve UTAR, Zülfikar DEMİRTAĞ

Pages : 99-103

Doi:10.61139/ijdor.1298690

View : 37 | Download : 39

Publication Date : 2023-08-25

Article Type : Research Paper

Abstract :Objectives: Optimal mechanical and aesthetic properties are expected from all ceramic restorations in dentistry to maintain good prognosis. Zirconia restorations have had mechanical advantages and lithium disilicate ceramics have provided aesthetic advantages. This study intended to compare the four-point flexural strength and translucency of zirconia reinforced lithium silicate with solid zirconia and lithium disilicate. Material and Methods: 90 bars insert ignore into journalissuearticles values(1x4x18 mm); for flexural strength test insert ignore into journalissuearticles values(n=30); and 30 square shaped insert ignore into journalissuearticles values(1x10x10 mm); samples for translucency measurement insert ignore into journalissuearticles values(n=10); were obtained from solid zirconia insert ignore into journalissuearticles values(BR-BruxZir);, zirconia reinforced lithium silicate insert ignore into journalissuearticles values(VS-Vita Suprinity); and lithium disilicate insert ignore into journalissuearticles values(EM-Emax CAD); blocks. All BR samples were sintered, VS and EM were crystallized according to the manufacturer\`s recommendations. These samples were grinded and polished. Subsequently, they were ultrasonically cleaned and flexural strength values insert ignore into journalissuearticles values(MPa); were obtained in a universal test device. Color measurements were performed with a dental spectrophotometer using black and white backgrounds to determine the translucency values. Statistical analysis was performed using one-way ANOVA and Tukey HSD tests. Results: BR showed the highest mean flexural strength. There was no significant difference between EM and VS insert ignore into journalissuearticles values(p>0.05);, while BR showed significantly different flexural strength insert ignore into journalissuearticles values(p<0.05);. EM and VS showed similar translucency, whereas translucency of BR was significantly lower than other groups insert ignore into journalissuearticles values(p<0.05);. Conclusions: Lithium silicate reinforced with zirconia showed similar translucency with lithium disilicate. However, being reinforced with zirconia did not contribute to four point flexural strength.
Keywords : dört nokta bükülme dayanımı, lityum disilikat, translüsensi, zirkonya, zirkonya ile güçlendirilmiş lityum silikat