Document Detail

Surface roughness of five different dental ceramic core materials after grinding and polishing.
MedLine Citation:
PMID:  16457671     Owner:  NLM     Status:  MEDLINE    
In clinical practice, core materials can be exposed after adjustments are made to previously-luted all-ceramic restorations. The purpose of this study was to evaluate the surface roughness of five different dental ceramic core materials after grinding and polishing. Five different ceramic core materials, Vita In-Ceram Alumina, Vita In-Ceram Zirconia, IPS Empress 2, Procera AllCeram, and Denzir were evaluated. Vita Mark II was used as a reference material. The surface roughness, Ra value (mum), was registered using a profilometer. The measurements were made before and after grinding with diamond rotary cutting instruments and after polishing with the Sof-Lex system. The surface of representative specimens was evaluated qualitatively using scanning electron microscopy (SEM). Results were statistically analysed using analysis of variance (anova) supplemented with Scheffè's and Bonferroni multiple-comparison tests. Before grinding, Procera AllCeram and Denzir had the smoothest surfaces, while IPS Empress 2 had the coarsest. After grinding, all materials except IPS Empress 2 became coarser. Polishing with Sof-Lex provided no significant (P > 0.05) differences between Denzir, Vita Mark II and IPS Empress 2 or between Procera AllCeram and In-Ceram Zirconia. There were no significant differences (P > 0.05) either between the ground and the polished Procera AllCeram or In-Ceram Alumina specimens. Polishing of Denzir, IPS Empress 2 and In-Ceram Zirconia made the surfaces smoother compared with the state after grinding, whereas the polishing effect on Procera AllCeram and In-Ceram Alumina was ineffective. The findings of the SEM evaluation were consistent with the profilometer readings.
W Kou; M Molin; G Sjögren
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of oral rehabilitation     Volume:  33     ISSN:  0305-182X     ISO Abbreviation:  J Oral Rehabil     Publication Date:  2006 Feb 
Date Detail:
Created Date:  2006-02-06     Completed Date:  2006-09-15     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0433604     Medline TA:  J Oral Rehabil     Country:  England    
Other Details:
Languages:  eng     Pagination:  117-24     Citation Subset:  D; IM    
Dental Materials Science and Prosthetic Dentistry, Faculty of Medicine, Umea University, Sweden.
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MeSH Terms
Aluminum Oxide
Aluminum Silicates
Dental Polishing / methods
Dental Porcelain*
Microscopy, Electron, Scanning / methods
Surface Properties
Reg. No./Substance:
0/AllCeram; 0/Aluminum Silicates; 0/Denzir; 0/IPS-Empress ceramic; 0/In-Ceram Alumina; 0/In-Ceram Zirconia; 0/Vita Mark II; 12001-21-7/Dental Porcelain; 1344-28-1/Aluminum Oxide

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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