Avaliação da Topografia de Superfície e Microdureza de Resinas Acrílicas e uma Resina Bisacrílica Submetidas a Diferentes Técnicas de Polimento

Eduardo Lima  Santana de Ávila; Luís Felipe  dos Reis Goyatá; Thamyryz Rafaela  Almeida Simões; Celia  Moreira Lanza; João  Batista Novaes Júnior; Amália  Moreno; Elissa  Talma; Ivan  Barreiros Doche; Frederico  dos Reis Goyatá

doi:10.16925/2357-4607.2019.02.10

Assessment of Surface Topography and Microhardness of Acrylic Resins and a Bisacrylic Resin Submitted to Different Polishing Techniques

Research Articles

https://doi.org/10.16925/2357-4607.2019.02.10

Eduardo Lima Santana de Ávila Ver Biografía

São Leopoldo Mandic

Luís Felipe dos Reis Goyatá Ver Biografía

São Leopoldo Mandic

Thamyryz Rafaela Almeida Simões Ver Biografía

Universidade Federal de Minas Gerais

Celia Moreira Lanza Ver Biografía

Universidade Federal de Minas Gerais

João Batista Novaes Júnior Ver Biografía

Universidade Federal de Minas Gerais

Amália Moreno Ver Biografía

Universidade Federal de Minas Gerais

Elissa Talma Ver Biografía

Universidade Federal de Minas Gerais

Ivan Barreiros Doche Ver Biografía

Universidade Federal de Minas Gerais

Frederico dos Reis Goyatá Ver Biografía

Universidade Federal de Minas Gerais

Introduction: Acrylic resins are indicated mainly for making temporary restorations fixed partial denture. This work aims to verify the influence of different polishing systems on the surface topography and microhardness of three acrylic resins: Dencôr, Dencrilay Speed, Duralay and a bisacrylic resin: Proviplast.

Methodology: 140 specimens were made with a cylindrical silicone matrix of dimensions 5 x 2 mm (ISO 4872) that were distributed in fourteen test groups, according to the polishing (n: 10): ecs - Silicon Carbide brush, pbd - rubber tips impregnated with diamond, pd - paste diamond and GL: application of glaze. The roughness (Ra), Atomic Force Microscopy (mfa) and Microhardness (Ma) were obtained before and after polishing performed with the described systems.

Results: The data obtained in the study were tabulated and analyzed by anova and Student’s “t” test 5% (α = 0.05). The roughness values varied between 0.05 and 6.2 μm and the bisacrylic resin with glaze presented the lowest average of roughness (0.05) and Dencrilay without polishing presented the highest value (6.2). The microhardness values varied between 23.3 and 11.6 where Duralay with abrasive rubber presented the highest average microhardness (23.3) and Duralay with paste the lowest value (11.6). Among the tested materials, resin bisacrylic with glaze obtained the lowest surface roughness value and Duralay resin with rubber obtained the highest microhardness value.

Keywords: dental materials, dental prosthesis, polishing, dentistry

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Assessment of Surface Topography and Microhardness of Acrylic Resins and a Bisacrylic Resin Submitted to Different Polishing Techniques. (2019). Revista Nacional De Odontología, 15(29), 1-20. https://doi.org/10.16925/2357-4607.2019.02.10

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Vol. 15 No. 29 (2019)

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2019-07-01

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