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- Title
A comparison of three-dimensional marginal adaptation among three all-ceramic crown systems.
- Authors
Zhang Yan; Li Jiang; Xue Xiao-Qin; Chen Zhen-yu; Li Xiao-ju
- Abstract
PURPOSE: This study was to compare the marginal adaptation of single crown made of 3 different all -ceramic systems (IPS e.max, In-Ceram alumina, Kavo Everest) in vitro using a light-body silicone supported by a heavy-body silicone material. METHODS: The crowns were made for 1 extracted maxillary premolar prepared with a 0.8-mm chamfer margin and 6-degree tapered walls by milling. Ten crowns per system were fabricated. The horizontal marginal discrepancies, vertical marginal discrepancies and absolute marginal discrepancies were measured under an optical microscope at 39.2 magnification. The data were analyzed with one-way analysis of variance (ANOVA) using SPSS 13.0 software package. RESULTS: The results showed the mean values for horizontal marginal discrepancies were between 41.1µm and 44.9µm, for vertical marginal discrepancies were between 51.4µm and 71.7µm, and for absolute marginal discrepancies were between 66.2µm and 85.1µm. CONCLUSIONS: The horizontal marginal discrepancies, vertical marginal discrepancies and absolute marginal discrepancies of the three all --ceramic crown systems were within the clinically acceptable standard. However, the IPS e.max system and the Kavo Everest System showed a better marginal fit compared with the In-- Ceram alumina system. Supported by Grant from Science and Technology Projects of Changchun City(06GG163).
- Subjects
DENTAL crowns; DENTAL ceramics; BIOLOGICAL adaptation; DENTAL materials; DENTAL extraction; MICROFABRICATION; ANALYSIS of variance
- Publication
Shanghai Journal of Stomatology, 2011, Vol 20, Issue 5, p494
- ISSN
1006-7248
- Publication type
Article