Effect of polishing systems on surface roughness and topography of monolithic zirconia

Chui Ling Goo, A. U J Yap, K. B C Tan, A. S. Fawzy

Research output: Contribution to journalArticle

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Abstract

This study evaluated the effect of different chairside polishing systems on the surface roughness and topography of monolithic zirconia. Thirty-five monolithic zirconia specimens (Lava PLUS, 3M ESPE) were fabricated and divided into five groups of seven and polished with the following: Group 1 (WZ) - Dura white stone followed by Shofu zirconia polishing kit; Group 2 (SZ) - Shofu zirconia polishing kit; Group 3 (CE) - Ceramiste porcelain polishers; Group 4 (CM) - Ceramaster porcelain polishers; and Group 5 (KZ) - Komet ZR zirconia polishers. All specimens were ground with a fine-grit diamond bur prior to polishing procedures to simulate clinical finishing. Baseline and post-polishing profilometric readings were recorded and delta Ra values (difference in mean surface roughness before and after polishing) were computed and analyzed using one-way analysis of variance and Scheffe post hoc test (p<0.05). Representative scanning electron microscopy (SEM) images of the ground but unpolished and polished specimens were acquired. Delta Ra values ranged from 0.146 for CE to 0.400 for KZ. Delta Ra values for KZ, WZ, and SZ were significantly greater than for CE. Significant differences in delta Ra values were also observed between KZ and CM. The SEM images obtained were consistent with the profilometric findings. Diamond-impregnated polishing systems were more effective than silica carbide-impregnated ones in reducing the surface roughness of ground monolithic zirconia.

Original languageEnglish
Pages (from-to)417-423
Number of pages7
JournalOperative Dentistry
Volume41
Issue number4
DOIs
Publication statusPublished - 1 Jul 2016

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Dental Porcelain
Diamond
Electron Scanning Microscopy
Silicon Dioxide
zirconium oxide
Reading
Analysis of Variance

ASJC Scopus subject areas

  • Dentistry(all)

Cite this

Effect of polishing systems on surface roughness and topography of monolithic zirconia. / Goo, Chui Ling; Yap, A. U J; Tan, K. B C; Fawzy, A. S.

In: Operative Dentistry, Vol. 41, No. 4, 01.07.2016, p. 417-423.

Research output: Contribution to journalArticle

Goo, Chui Ling ; Yap, A. U J ; Tan, K. B C ; Fawzy, A. S. / Effect of polishing systems on surface roughness and topography of monolithic zirconia. In: Operative Dentistry. 2016 ; Vol. 41, No. 4. pp. 417-423.
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