| ZrO2 three-unit fixed partial dentures: comparison of failure load before and after exposure to a mastication simulator. | |
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MedLine Citation:
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PMID: 17371566 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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This study evaluated the failure load of different zirconia-based all-ceramic fixed partial dentures (FPD) before and after artificial aging. Forty-eight zirconia frameworks for three-unit FPDs were fabricated using different manufacturing systems [(DCS), Procera (Nobel Biocare) and Cerec inLab (Sirona)], veneered using Vita VM9 (Vita Zahnfabrik) opaque ceramic and conventionally cemented on human teeth. The restorations were divided according to the system used for manufacturing the frameworks into three groups of 16 specimens each (DCS, Procera and Vita YZ-Cerec). Half of each group was artificially aged through dynamic loading and thermal cycling, whereas, the other half was not subjected to artificial aging. Subsequently, all specimens were loaded occlusally until fracture occurred using a universal testing machine. Pair-wise Wilcoxon rank tests were performed to test for differences in failure loads at a statistical significance level of 0.05. All specimens subjected to artificial aging survived with no failures. The median (IQR=x0.25-x0.75) failure loads (N) before and after artificial aging were, respectively, as follows: group DCS, 2131 (1948-2239) and 1797 (1590-2074); group Procera, 1684 (1615-1873) and 1394 (1275-1495); and group Vita YZ-Cerec, 1845 (1621-1923) and 1625 (1521-1747). No significant differences were found for comparisons between different groups before artificial aging. After artificial aging, group Procera showed significantly smaller values than group DCS (P=0.042). All tested restorations have the potential to withstand occlusal forces applied in the posterior region and can therefore represent interesting alternatives to replace metal-ceramic restorations. Further assessments are needed before recommending these restorations for daily practice. |
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Authors:
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W Att; M Grigoriadou; J R Strub |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of oral rehabilitation Volume: 34 ISSN: 0305-182X ISO Abbreviation: J Oral Rehabil Publication Date: 2007 Apr |
Date Detail:
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Created Date: 2007-03-20 Completed Date: 2007-06-21 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0433604 Medline TA: J Oral Rehabil Country: England |
Other Details:
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Languages: eng Pagination: 282-90 Citation Subset: D; IM |
Affiliation:
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Department of Prosthodontics, Faculty of Dentistry, Albert-Ludwigs University, Freiburg, Germany. wael.att@uniklinik-freiburg.de |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Bicuspid Ceramics* Dental Materials* Dental Porcelain Dental Restoration Failure* Dental Stress Analysis / methods Denture Design / methods Denture, Partial, Fixed* Humans Mandible Mastication / physiology* Metal Ceramic Alloys Molar Stress, Mechanical Time Factors Titanium Zirconium* |
| Chemical | |
Reg. No./Substance:
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0/Ceramics; 0/Dental Materials; 0/Metal Ceramic Alloys; 0/Procera; 12001-21-7/Dental Porcelain; 1314-23-4/zirconium oxide; 131552-79-9/Cerec; 7440-32-6/Titanium; 7440-67-7/Zirconium |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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