Título: | DAMAGE QUANTIFICATION OF DENTINE SURFACE AFTER BLASTING WITH SODIUM BICARBONATE | ||||||||||||||||||||||||||||||||||||
Autor: |
MARCELO SOUZA MAGALHAES BASTOS |
||||||||||||||||||||||||||||||||||||
Colaborador(es): |
MARCOS VENICIUS SOARES PEREIRA - Orientador CLAUDIO PINHEIRO FERNANDES - Coorientador |
||||||||||||||||||||||||||||||||||||
Catalogação: | 25/ABR/2006 | Língua(s): | PORTUGUESE - BRAZIL |
||||||||||||||||||||||||||||||||||
Tipo: | TEXT | Subtipo: | THESIS | ||||||||||||||||||||||||||||||||||
Notas: |
[pt] Todos os dados constantes dos documentos são de inteira responsabilidade de seus autores. Os dados utilizados nas descrições dos documentos estão em conformidade com os sistemas da administração da PUC-Rio. [en] All data contained in the documents are the sole responsibility of the authors. The data used in the descriptions of the documents are in conformity with the systems of the administration of PUC-Rio. |
||||||||||||||||||||||||||||||||||||
Referência(s): |
[pt] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=8201&idi=1 [en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=8201&idi=2 |
||||||||||||||||||||||||||||||||||||
DOI: | https://doi.org/10.17771/PUCRio.acad.8201 | ||||||||||||||||||||||||||||||||||||
Resumo: | |||||||||||||||||||||||||||||||||||||
This work presents the results concerning the damage
quantification in human molar dentine surfaces after
blasting with sodium
bicarbonate. After selection and preparation, the samples
were divided
into two experimental groups (Control Group and Blasting
Group). Initially,
the roughness and local hardness (microhardness) of the
Control Group
were measured and adopted as standard values. In the
sequence, the
samples of the Blasting Group were subjected to different
blasting
conditions, making change in parameters as grain size of
the sodium
bicarbonate particles (60 and 200 mesh), water-sodium
bicarbonate-air
mixture outflowing (minimum and maximum) and
instrumentation time
(15 and 30 seconds). Finally, the roughness and the
microhardness of
the dentine region were measured, as well as the area of
the surface
depressions due to blasting. The results showed that all
blasting
conditions caused damages in the dentine region,
characterized by an
increase in roughness and microhardness, as well as the
creation of
cavities in this region. The minimum water-sodium
bicarbonate-air mixture
outflowing was associated with larger values of roughness
and
microhardness in the dentine region. On the other hand,
larger areas of
cavities in the same region were created by smaller
particles of sodium
bicarbonate when blasted with maximum water-sodium
bicarbonate-air
mixture outflowing.
|
|||||||||||||||||||||||||||||||||||||
|