Document Detail

Comparison of the effects of surface treatments on roughness of two ceramic systems.
MedLine Citation:
PMID:  22506513     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: The aim of this study was to evaluate the effects of different surface treatments on the surface roughness of lithium disilicate-based core (IPS Empress 2, shade 210, Ivoclar Vivadent, Schaan, Liechtenstein) and feldspathic ceramics (Vita VM9, VITA Zahnfabrik H. Rauter GmbH & Co. KG, Bad Säckingen, Germany).
BACKGROUND DATA: Er:YAG laser irradiation is expected to be an alternative surface treatment, thus enhances surface roughness of procelains and produces morphological changes.
METHODS: Fifty lithium disilicate-based core ceramic discs and 50 feldspathic ceramic discs were prepared (diameter, 10 mm; thickness, 1 mm) according to the manufacturers' instructions. All-ceramic discs were polished to standardize, and surface roughness of the discs was evaluated before treatment and serving as controls. Both of two ceramic groups were divided into five groups (n=10), and the following treatments were applied: (1) sandblasting with aluminum oxide (Al(2)O(3); Group SB); (2) Al(2)O(3)+Er:YAG laser (Group SB-L); (3) Er:YAG laser irradiation (distance, 1 mm; 500 mJ; 20 Hz; 10W; manually, contact handpiece [R 14]) (Group L); (4) 5% hydrofluoric acid etching (Group HF); and (5) Er:YAG laser +5% hydrofluoric acid (Group HF-L). Surface roughness was evaluated by profilometry, and specimens were then examined with atomic force microscopy.
RESULTS: Data were analyzed by Wilcoxon signed rank, Mann-Whitney U, and Kruskal-Wallis tests (α=0.05). The Wilcoxon signed rank test results indicated that surface roughness after sandblasting was significantly different from the surface roughness after laser irradiation and acid etching (p<0.001). Mann-Whitney U and Kruskal-Wallis test results indicated that groups SB and SB-L had significantly higher mean roughness values (p<0.05) than those in the other groups.
CONCLUSIONS: Groups SB and SB-L had rougher surfaces than the groups subjected to the other surface treatment methods. There was no significant difference in surface roughness between the HF acid etching, Er:YAG laser irradiation, and HF and Er:YAG (p<0 .05).
Erhan Dilber; Tevfik Yavuz; Haluk Baris Kara; A Nilgun Ozturk
Related Documents :
16861053 - Corticosteroid therapy in the age of infliximab: acute and 1-year outcomes in newly dia...
1505703 - Treatment with inhaled steroids in asthma and chronic bronchitis: long-term compliance ...
18504933 - Influence of age on pharyngoesophageal spasm rates in laryngectomees.
Publication Detail:
Type:  Comparative Study; Journal Article     Date:  2012-04-16
Journal Detail:
Title:  Photomedicine and laser surgery     Volume:  30     ISSN:  1557-8550     ISO Abbreviation:  Photomed Laser Surg     Publication Date:  2012 Jun 
Date Detail:
Created Date:  2012-06-12     Completed Date:  2012-10-19     Revised Date:  2014-07-31    
Medline Journal Info:
Nlm Unique ID:  101222340     Medline TA:  Photomed Laser Surg     Country:  United States    
Other Details:
Languages:  eng     Pagination:  308-14     Citation Subset:  IM    
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Acid Etching, Dental / methods*
Acrylic Resins / pharmacology
Air Abrasion, Dental
Aluminum Oxide / pharmacology
Composite Resins / pharmacology
Dental Bonding / methods*
Dental Porcelain / radiation effects*
Dental Stress Analysis
Hydrofluoric Acid / pharmacology
Lasers, Solid-State / therapeutic use*
Materials Testing
Polyurethanes / pharmacology
Reference Values
Resin Cements / pharmacology
Sampling Studies
Statistics, Nonparametric
Surface Properties
Reg. No./Substance:
0/Acrylic Resins; 0/Composite Resins; 0/Polyurethanes; 0/Resin Cements; 0/Vivadent; 12001-21-7/Dental Porcelain; LMI26O6933/Aluminum Oxide; RGL5YE86CZ/Hydrofluoric Acid

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

Previous Document:  Long-term skeletal stability after maxillary advancement with distraction osteogenesis in cleft lip ...
Next Document:  Measuring CREB Activation Using Bioluminescent Probes That Detect KID-KIX Interaction in Living Cell...