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Doctoral Thesis
DOI
10.11606/T.23.2005.tde-03102005-101433
Document
Author
Full name
Carlos Martins Agra
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2005
Supervisor
Committee
Vieira, Glauco Fioranelli (President)
Araujo, Elito
Chaves Filho, Antonio Ruy
Morimoto, Susana
Oda, Margareth
Title in Portuguese
"Avaliação quantitativa e qualitativa de duas cerâmicas frente a diferentes tratamentos de superfície"
Keywords in Portuguese
Análise qualitativa
Análise quantitativa
Cerâmica dental
Parâmetros de rugosidade
Abstract in Portuguese
A característica de superfície representa um fator importante na previsibilidade do comportamento dos materiais cerâmicos quanto ao desgaste. A rugosidade superficial de duas cerâmicas (Duceram Plus e Duceragold) foi avaliada através de dois métodos - análise quantitativa e qualitativa - após diferentes tratamentos. Foram confeccionados 36 corpos de prova de prova para a análise ao rugosímetro, e 24 corpos de prova para a análise ao MEV. Os resultados destas análises demonstraram o comportamento distinto entre os diferentes tratamentos. A análise com o rugosímetro demonstrou que a ação dos polidores EDENTA foi a mais efetiva para devolver lisura à superfície após a realização de desgaste com instrumento abrasivo diamantado rotatório. Todas as técnicas de polimento acarretaram em valores de rugosidade menores que os observados nos espécimes que foram submetidos apenas os “glaze”. Entre as cerâmicas avaliadas, a Duceragold apresentou valores médios de rugosidade inferiores aos observados na porcelana Duceram Plus na maioria dos tratamentos pesquisados. Pela análise ao MEV não foi possível distinguir diferenças entre as cerâmicas ou entre os corpos de prova polidos ou submetidos apenas ao “glaze”.
Title in English
Quantitative and qualitative evaluation of the two ceramics in differents surfaces tratment
Keywords in English
Dental ceramics
Qualitative analysis
Quantitative analysis
Roughness parameters
Abstract in English
The surface characteristic of ceramic material is an important factor to predict its wear behavior. The surface roughness of two ceramics (Duceram Plus e Duceragold) was evaluated trough qualitative and quantitative methods after different treatments. 36 specimens were fabricated for the analysis utilizing a surface profiling instrument, and 24 for the SEM analysis. The results determined different behavior between the two ceramics evaluated due the treatment executed. The analysis utilizing a surface profiling instrument showed that the treatment using the EDENTA polishers was the most effective technique to provide the smoothest surface after trimming. All polishing techniques resulted in better surface properties when compared to the treatment glaze. The Duceragold ceramic presented lower roughness values in most treatments executed when compared to Duceram Plus. The perception trough the SEM analysis of significant differences between treatments or between the two ceramics was not achievable.
 
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Publishing Date
2005-10-14
 
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