Effects of polishing press-on force on surface roughness and gloss of CAD-CAM composites.
J Oral Sci
; 65(2): 131-135, 2023.
Article
em En
| MEDLINE
| ID: mdl-36990758
ABSTRACT
PURPOSE:
The aim of this study was to determine the effect of polishing press-on force on surface roughness and gloss of computer-aided design-computer-aided manufacturing (CAD-CAM) composites.METHODS:
The materials evaluated included a CAD-CAM ceramic, a polymer-infiltrated ceramic, and three filler-based CAD-CAM composites. The CAD-CAM blocks were sectioned, embedded in self-cured resin, finished with abrasive papers and ultrasonically cleaned. Specimens were subsequently polished using the Sof-Lex disk system with 0.5, 1.0, 1.5, and 2.0 N press-on force by means of a custom-made apparatus. Contour arithmetic mean deviation (Ra) and gloss value (GU) data were acquired with a profilometer and glossmeter, respectively, and analyzed using ANOVA/Bonferroni post hoc test and Pearson's correlation (α = 0.05). Representative samples of the various materials at baseline and after each polishing step were examined under scanning electron microscope.RESULTS:
Mean Ra and GU values ranged from 0.096 ± 0.004 µm to 0.295 ± 0.045 µm and 13.4 ± 1.9 to 67.6 ± 11.3 correspondingly for the various material-force combinations. Surface roughness and gloss were found to be press-on force and material dependent. A moderately strong and negative correlation (rs = -0.69) existed between Ra and GU values.CONCLUSION:
For optimal smoothness and gloss, ceramic and polymer-infiltrated ceramic CAD-CAM materials must be polished with a 2.0 N force, while filler-based CAD-CAM composites should, in general, be polished using a 1.0 to 1.5 N force.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Resinas Compostas
/
Polimento Dentário
Tipo de estudo:
Evaluation_studies
Limite:
Humans
Idioma:
En
Revista:
J Oral Sci
Assunto da revista:
ODONTOLOGIA
Ano de publicação:
2023
Tipo de documento:
Article