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Characterization of the resin luting materials: percentage, morphology and Mechanical properties.

Aim: The purpose of this study was: 1) to determine the percentage of fillers by weight of the investigated materials by thermogravimetric analysis (TGA), to examine their fillers morphology using scanning electron microscopy (SEM), 2) and to evaluate the mechanical properties of these materials. Methods: Seven luting materials (Rely X Unicem, Maxcem, Monocem, G-Cem, Panavia F2, Variolink II and Clearfil Esthetic Cement) and the micro-hybrid resin composite Clearfil AP-X (control) were evaluated. Thermogravimetric analysis (TGA) was used to determine the percentage of fillers by weigh and the fillers morphology was determined using scanning electron microscopty (SEM). Regarding mechanical properties, five specimens of each material were used to measure dynamic and static moduli of elasticity and Vickers microhardness. Results: The percentage of fillers by weight ranged between 60% (Monocem) and 73% (Variolink II). For the micro-hybrid resin composite Clearfil AP-X used as control, the weight percentage of fillers was 83.5%. Some values in this study were different from those given by the manufacturers. SEM photographs showed various shapes and sizes of inorganic fillers. Irregular shaped particles were found in Maxcem, Monocem and Variolink II. Rely X Unicem showed large irregular shaped filler aggregates. Irregular and spheroidal particles associated with aggregates were found in Panavia F2, Clearfil Esthetic Cement, G-Cem and Clearfil AP-X. Variations in mechanical properties were observed within the tested materials. Conclusion: Wide variations in morphology and percentage of fillers were observed between our TGA’s data and those given by the manufacturers and will probably affect the mechanical properties of luting materials.

Auteur(s) : Sarr M, Leye-Benoist F, Aidara AW, Faye B, Bane K, Touré B.
Pages : 1-8
Année de publication : 2016
Revue : Journal of Dentistry and Oral Care
N° de volume : Volume 2, Issue3
Type : Article
Mise en ligne par : FAYE Babacar