Journal Published Online: 26 March 2019
Volume 48, Issue 4

Measuring the Static and Dynamic Elastic Modulus in Y-TZP Ceramic Applied to Dentistry

CODEN: JTEVAB

Abstract

Yttria tetragonal zirconia polycrystal in the form of presintered commercial blocks is used to manufacture dental prostheses through computer-aided design/computer-aided manufacturing technology. Although it presents appropriate mechanical properties, it may fail because of defects resulting from the forming, presintering, machining, or sintering processes. The aim of the current study is to evaluate the influence of the presintering process on the microhardness of presintered blocks and on the elastic modulus of sintered materials. Blocks were formed by means of uniaxial and isostatic pressing. Next, they were presintered at different temperatures and soaking times, besides being subjected to the Vickers microhardness and mechanical tests to evaluate their elastic modulus. Statistical analyses showed that the presintering time at 900°C had no effect on microhardness, although it was significant at 950°C. The postsintering elastic modulus ranged from 205.7 to 231.9 GPa, which is similar to the range recorded in the literature. The presintering process had no influence on the postsintering mechanical resistance results.

Author Information

Kavashima, Lieca Hassegawa
Departamento de Engenharia Mecânica, Universidade Estadual Paulista “Júlio de Mesquita Filho,” Avenida Engenheiro Luiz Edmundo Carrijo Coube 14-01, Bauru, São Paulo, Brazil
Neto, Vicente Gerlin
Departamento de Engenharia Mecânica, Universidade Estadual Paulista “Júlio de Mesquita Filho,” Avenida Engenheiro Luiz Edmundo Carrijo Coube 14-01, Bauru, São Paulo, Brazil Instituto Federal de Educação, Birigui, São Paulo, Brazil
Bastos, Natalia Almeida
Departmento de Dentística, Endodontia e Materiais Dentários, Faculdade de Odontologia de Bauru, Universidade de São Paulo, Bauru, São Paulo, Brazil
Fortulan, Carlos Alberto
Departmento de Engenharia Mecânica, Escola de Engenharia de São Carlos, Universidade de São Paulo, São Carlos, São Paulo, Brasil
Borges, Ana Flavia Sanches
Departmento de Dentística, Endodontia e Materiais Dentários, Faculdade de Odontologia de Bauru, Universidade de São Paulo, Bauru, São Paulo, Brazil
Pintão, Carlos Alberto Fonzar
Departamento de Física, Universidade Estadual Paulista “Júlio de Mesquita Filho,” Av. Eng. Luiz Edmundo Carrijo Coube, 14-01, Bauru, São Paulo, Brazil
Foschini, Cesar Renato
Departamento de Engenharia Mecânica, Universidade Estadual Paulista “Júlio de Mesquita Filho,” Avenida Engenheiro Luiz Edmundo Carrijo Coube 14-01, Bauru, São Paulo, Brazil
Pages: 11
Price: $25.00
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Stock #: JTE20180579
ISSN: 0090-3973
DOI: 10.1520/JTE20180579