Analysis of flexural strength and microhardness of two alumina glass infiltrated ceramic systems

• Autor(a) principal: Figueiredo Filho, Basílio Pires de
• Data de Publicação: 2013
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Revista Brasileira de Odontologia
• Texto Completo: https://revista.aborj.org.br/index.php/rbo/article/view/423
• topic: MEDICINA DENTÁRIA (ODONTOLOGIA); Prótese; In-Ceram Alumina; Alglass; Resistência flexural; Microdureza; MEV.

The aim of this work was to evaluate, in vitro, the microhardness, mechanical properties and fracture surface morphology of two different systems of glass infiltrated dental ceramic: In-Ceram Alumina (Vita) and Alglass (Celmat) systems. Both materials were used to prepare bar-shaped specimens according to ISO 6872-1998. Three point flexural strength and Vickers microhardness through indentation tests were used to evaluate the samples. The samples surface fracture was achieved through SEM. The Results showed that In-Ceram Alumina presented higher flexural strength values (441.7 ± 54.1 MPa) than Alglass (287.8 ± 53.6 MPa). There was no significant statistic difference in microhardness Vickers results (1210,4 ± 90,0 HV; 1135,6 ± 117,5 HV) between two groups, respectively. In-Ceram Alumina had more homogeneity and less pores at fracture surface than the Alglass. However, Alglass has reduced costs in relation to In-Ceram Alumina and reached the ISO 6872-1998 standard requirements, by this mean this material can be considered to be used clinically used.