Radiopacity and Chemical Assessment of New Commercial Calcium Silicate-Based Cements

Camila Corral; Pedro Negrete; Juan Estay; Sylvia Osorio; CRISTIAN COVARRUBIAS; Osmir B de Oliveira Junior; Hernane Barud

Keywords: chemical analysis, physical properties, dental materials, análisis químico, propiedades físicas, materiales dentales, silicate cement, cementos de silicato


"ABSTRACT: The aim of the study was to evaluate the chemical composition and radiopacity of new calcium-silicatebased cements. Discs of 10 mm x 1 ± 0.1mm were prepared of BiodentineTM, TheraCal, Dycal and GC Fuji IX (n=5). The samples were radiographed directly on an PSP occlusal plate adjacent to an aluminium step wedge. The radiopacity of each specimen was determined according to ISO 9917/2007. Statistical analyses were carried out using ANOVA and Tukey's test at a significance level of 5 %. The chemical constitution of materials was determined by scanning electron microscopy (SEM) and energy dispersive x-ray element mapping. The radiopacities of the materials in decreasing order were: GC Fuji IX (3.45 ± 0.16 mm), Dycal (3.18 ± 0.17), BiodentineTM (2.79 ± 0.22), and TheraCal (2.17 ± 0.17). TheraCal showed the lowest radiopacity compared to the other materials, followed by BiodentineTM. Dycal and GC Fuji IX radiopacity values did not present significant statistical differences. Scanning electron microscopy and energy dispersive X-ray analysis revealed the presence of zirconium in BiodentineTM; and strontium, barium and zirconium in TheraCal as radiopacifying elements. The new calcium silicate cements present distinctive chemical composition. BiodentineTM contains zirconium as a radiopacifying element and has higher radiopacity values than TheraCal, which contains barium and strontium as radiopacifiers."

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Título según SCIELO: Radiopacity and Chemical Assessment of New Commercial Calcium Silicate-Based Cements
Volumen: 12
Número: 3
Editorial: Facultad de Medicina, Universidad de La Frontera.
Fecha de publicación: 2018
Página de inicio: 262
Página final: 268
Idioma: en