Effect of different surface treatments on roughness of IPS Empress 2 ceramic

KARA H. B., Dilber E., Koc O., Ozturk A. N., Bulbul M.

Lasers in Medical Science, vol.27, no.2, pp.267-272, 2012 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 27 Issue: 2
  • Publication Date: 2012
  • Doi Number: 10.1007/s10103-010-0860-3
  • Journal Name: Lasers in Medical Science
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.267-272
  • Keywords: AFM, Surface treatment, Ceramic, Laser, Roughness
  • Istanbul Medipol University Affiliated: Yes


The aim of this study was to evaluate the influence of different surface treatments (air abrasion, acid etching, laser irradiation) on the surface roughness of a lithium-disilicate-based core ceramic. A total of 40 discs of lithium disilicate-based core ceramic (IPS Empress 2; Ivoclar Vivadent, Schaan, Liechtenstein) were prepared (10 mm in diameter and 1 mm in thickness) according to the manufacturer's instructions. Specimens were divided into four groups (n=10), and the following treatments were applied: air abrasion with alumina particles (50 μm), acid etching with 5% hydrofluoric acid, Nd: YAG laser irradiation (1 mm distance, 100 mJ, 20 Hz, 2 W) and Er:YAG laser irradiation (1 mm distance, 500 mJ, 20 Hz, 10 W) . Following determination of surface roughness (Ra) by profilometry, specimens were examined with atomic force microscopy. The data were analysed by one-way analysis of variance (ANOVA) and Tukey HSD test (α=0.05) . Oneway ANOVA indicated that surface roughness following air abrasion was significantly different from the surface roughness following laser irradiation and acid etching (P<0.001) . The Tukey HSD test indicated that the air abrasion group had a significantly higher mean value of roughness (P<0.05) than the other groups. No significant difference was found between the acid etching and laser irradiation (both Er:YAG and Nd: YAG) groups (P>0.05) . Air abrasion increased surface roughness of lithium disilicate-based core ceramic surfaces more effectively than acid-etching and laser irradiation. © 2010 Springer-Verlag London Ltd. © 2010 Springer-Verlag London Ltd.