The effect of milling and postmilling procedures on the surface roughness of CAD/CAM materials

Purpose The aim of this study was to evaluate the surface roughness and analyze the surface topography of five different CAD/CAM ceramics and one CAD/CAM composite resin for CEREC after milling and postmilling procedures. Materials and Methods Blocks of the ceramics Mark II, IPS Empress CAD, IPS e.m...

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Published in:Journal of esthetic and restorative dentistry 2017-11, Vol.29 (6), p.450-458
Main Authors: Mota, Eduardo Gonçalves, Smidt, Laura Nunes, Fracasso, Lisiane Martins, Burnett, Luiz Henrique, Spohr, Ana Maria
Format: Article
Language:English
Subjects:
Atomic force microscopy
CAD/CAM
Ceramics
Composite materials
Crystallization
Data processing
dental ceramics
Dental restorative materials
Dentistry
Lithium
Studies
Surface roughness
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Summary:Purpose The aim of this study was to evaluate the surface roughness and analyze the surface topography of five different CAD/CAM ceramics and one CAD/CAM composite resin for CEREC after milling and postmilling procedures. Materials and Methods Blocks of the ceramics Mark II, IPS Empress CAD, IPS e.max CAD, Suprinity and Enamic, and blocks of the composite resin Lava Ultimate were milled at CEREC MCXL. Ten flat samples of each material were obtained. The surface roughness (Ra) test was performed before and after milling, crystallization, polishing, and glaze when indicated, followed by SEM and AFM analysis. Data were submitted to one‐way ANOVA with repeated measures and the Tukey HSD test (α = 0.05). Results The milling step significantly increased the roughness of all the tested materials (P 
ISSN:1496-4155
1708-8240
DOI:10.1111/jerd.12326