| Marginal and internal fit of all-ceramic CAD/CAM crown-copings on chamfer preparations. | |
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MedLine Citation:
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PMID: 15899023 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Evaluation of the marginal and internal fit of all-ceramic molar crown-copings hypothesizing that Computer Aided Design/Computer Aided Manufacturing (CAD/CAM) fabrication shows the same accuracy of fit as conventional techniques. A set of six individual crown preparations was duplicated 12 times yielding 72 plaster dies. Slip-cast (In-Ceram Zirconia), heat-pressing (Empress II) and CAD/CAM crown-copings (Cerec inLab, DCS, Decim and Procera) were seated on 12 dies each. Marginal and internal gap width was measured in the SEM at 120x magnification. Marginal gap of slip-cast (25 +/- 18 microm) was significantly (P < 0.05) smaller than that of Empress II (44 +/- 23 microm) copings. Procera (17 +/- 16 microm) and Decim (23 +/- 17 microm) did not differ (P > 0.05) from slip-cast (25 +/- 18 microm) but were smaller (P < 0.001/P < 0.01) than Empress II (44 +/- 23 microm) and Cerec inLab (43 +/- 23 microm) (P < 0.001/P < 0.05). DCS (33 +/- 20 microm) did not differ (P > 0.05) from any of the others. The internal mid-orobuccal gap width of Procera (136 +/- 68 microm) was larger (P < 0.001) than that of Decim (81 +/- 30 microm) and slip-cast (94 +/- 84 microm) (P < 0.05) while Empress II (105 +/- 53 microm), DCS (110 +/- 79 microm) and Cerec inLab (114 +/- 58 microm) did not differ significantly (P > 0.05) from Decim, Procera and slip-cast. Internal mesiodistal gap width was similar. The fit of conventional and CAD/CAM all-ceramic molar crown-copings covered the same range of gap width confirming the assumed hypothesis. |
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Authors:
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A Bindl; W H Mörmann |
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Publication Detail:
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Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of oral rehabilitation Volume: 32 ISSN: 0305-182X ISO Abbreviation: J Oral Rehabil Publication Date: 2005 Jun |
Date Detail:
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Created Date: 2005-05-18 Completed Date: 2005-08-18 Revised Date: 2009-11-19 |
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: 441-7 Citation Subset: D; IM |
Affiliation:
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Division of Aesthetic and Computer Restorations, Department of Preventive Dentistry, Periodontology and Cariology, Center for Dental and Oral Medicine, University of Zurich, Zurich, Switzerland. andreas.bindl@zzmk.unizh.ch |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Ceramics Computer-Aided Design* Crowns* Dental Marginal Adaptation* Dental Porcelain Dental Prosthesis Design* Humans Metal Ceramic Alloys Microscopy, Electron, Scanning Titanium |
| Chemical | |
Reg. No./Substance:
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0/Ceramics; 0/Metal Ceramic Alloys; 0/Procera; 12001-21-7/Dental Porcelain; 131552-79-9/Cerec; 7440-32-6/Titanium |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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