Comparison of surface roughness of nanofilled and microhybrid composite resins after curing and polishing / 南方医科大学学报
Journal of Southern Medical University
; (12): 727-730, 2014.
Article
en Zh
| WPRIM
| ID: wpr-249371
Biblioteca responsable:
WPRO
ABSTRACT
<p><b>OBJECTIVE</b>To compare the surface roughness of nanofilled dental composite resin and microhybrid composite resins after curing and polishing.</p><p><b>METHODS</b>A nanofilled composite (Z350) and 4 microhybrid composites (P60, Z250, Spectrum, and AP-X) were fabricated from the lateral to the medial layers to prepare 8 mm×8 mm×5 mm cubical specimens. The 4 lateral surfaces of each specimens were polished with abrasive disks (Super-Snap). Profilometer was used to test the mean surface roughness (Ra) after polishing.</p><p><b>RESULTS</b>P60 had the lowest Ra (0.125∓0.030 µm) followed by Z250 and Spectrum. The Ra of Z350 (0.205∓0.052 µm) was greater than that of the other 3 resins, and AP-X had the roughest surfaces. Under scanning electron microscope, the polished faces of P60 resin were characterized by minor, evenly distributed particles with fewer scratches; the polished faces of Z350 presented with scratches where defects of the filling material could be seen.</p><p><b>CONCLUSION</b>The nanofilled composite Z350 has smooth surface after polishing by abrasive disks, but its smoothness remains inferior to that of other micro-hybrid composite resins.</p>
Texto completo:
1
Base de datos:
WPRIM
Asunto principal:
Poliuretanos
/
Propiedades de Superficie
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Resinas Acrílicas
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Ensayo de Materiales
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Resinas Compuestas
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Materiales Dentales
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Pulido Dental
Idioma:
Zh
Revista:
Journal of Southern Medical University
Año:
2014
Tipo del documento:
Article