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    Volume 48, Issue 4 (July 2020)

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

    (Received 10 August 2018; accepted 3 January 2019)

    Published Online: 2020

    CODEN: JTEVAB

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    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

    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

    Instituto Federal de Educação, Birigui, São Paulo

    Bastos, Natalia Almeida
    Departmento de Dentística, Endodontia e Materiais Dentários, Faculdade de Odontologia de Bauru, Universidade de São Paulo, Bauru, São Paulo

    Fortulan, Carlos Alberto
    Departmento de Engenharia Mecânica, Escola de Engenharia de São Carlos, Universidade de São Paulo, São Carlos, São Paulo

    Borges, Ana Flavia Sanches
    Departmento de Dentística, Endodontia e Materiais Dentários, Faculdade de Odontologia de Bauru, Universidade de São Paulo, Bauru, São Paulo

    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

    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


    Stock #: JTE20180579

    ISSN:0090-3973

    DOI: 10.1520/JTE20180579

    Author
    Title Measuring the Static and Dynamic Elastic Modulus in Y-TZP Ceramic Applied to Dentistry
    Symposium ,
    Committee C28