Comparison of surface roughness of nanofilled and microhybrid composite resins after cur-ing and polishing
10.3969/j.issn.1673-4254.2014.05.28
- VernacularTitle:纳米树脂与几种微混合填料树脂固化后的抛光性能比较
- Author:
Hong JIANG
1
;
Da L
;
Kailei LIU
;
Weisheng ZHANG
;
Yao YAO
;
Chuhong LIAO
Author Information
1. 北京大学深圳医院口腔科
- Keywords:
composite resin;
polishing;
roughness;
nanometer
- From:
Journal of Southern Medical University
2014;(5):727-730
- CountryChina
- Language:Chinese
-
Abstract:
Objective To compare the surface roughness of nanofilled dental composite resin and microhybrid composite resins after curing and polishing. Methods 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. Results P60 had the lowest Ra (0.125 ± 0.030 μm) followed by Z250 and Spectrum. The Ra of Z350 (0.205±0.052μm) 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. Conclusion 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.
