Effect of Different Scaling Methods on the Surface Topography of Different CAD/CAM Ceramic Compositions

Abstract

This study evaluated the effect of ultrasonic and manual scaling using different scaler materials on the surface topography of computer-aided designing and computer-aided manufacturing (CAD/CAM) ceramic compositions. After scaling with manual and ultrasonic scalers, the surface properties of four classes of CAD/CAM ceramic discs: lithium disilicate (IPE), leucite-reinforced (IPS), advanced lithium disilicate (CT), and zirconia-reinforced lithium silicate (CD) of 1.5 mm thickness were evaluated. Surface roughness was measured before and after treatment, and scanning electron microscopy was used to evaluate the surface topography following the performed scaling procedures. Two-way ANOVA was conducted to assess the association of the ceramic material and scaling method with the surface roughness. There was a significant difference in the surface roughness between the ceramic materials subjected to different scaling methods (p < 0.001). Post-hoc analyses revealed significant differences between all groups except for IPE and IPS where no significant differences were detected between them. CD showed the highest surface roughness values, while CT showed the lowest surface roughness values for the control specimens and after exposure to different scaling methods. Moreover, the specimens subjected to ultrasonic scaling displayed the highest roughness values, while the least surface roughness was noted with the plastic scaling method.

Assessment of color stability and translucency of various CAD/CAM ceramics of different compositions and Thicknesses: An in vitro study

“…Sectioning was carried out using a precision cutting machine (Isomet 5000, Buehler, Lake Bluff, IL, USA), with an ample supply of cooling water, in accordance with the International Organization of Standards (ISO standards 6872:2015) . Subsequently, the specimens underwent polishing and crystallization as mentioned in previous studies ( Ellakany et al, 2021a , Ellakany et al, 2023a , Ellakany et al, 2023b ) in the research lab of College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia.…”

“…Owing to the superior mechanical and aesthetic traits, LD ceramic is often considered the preferred material for posterior and anterior restorations ( Ellakany et al, 2021a , 2023a , Freitas et al, 2023 ). In contrast, ZLS inclusion of zirconia particles and silicate crystals within the glassy matrix allowed their usagein implant-supported restorations as well as aesthetic tooth restorations, such as veneers ( Ellakany et al, 2023a , Ellakany et al, 2023b , Zarone et al, 2021 ).…”