ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
This study evaluated the marginal fit of CAD-CAM Zirconia cores with differentproximal height. Thirty Zirconia cores and ten metal ceramics crowns were used to evaluate themarginal gap. The marginal fit was determined to be perpendicular to the tooth axis between themost apical point on the coping margin (core) and the reference marks on the mesial, distal, labial,and palatal surfaces of the die at several key stages of crown fabrication; before porcelain built-up,after body porcelain built-up, and after glazing. Additionally, an opaque stage for the metal ceramiccopings was compared as well. Each measurement was carried out with a microscope. The means ofgaps among the groups were 58±27 -m, 69±23 -m, 89±29 -m and 80±28 -m, groups I, II, III andIV, respectively. In relation to the proximal and labiopalatal surfaces there were no statisticaldifference among the groups, except group I. No significant differences were observed in firingstages of all groups. The findings of this study showed that the mean marginal gap of Zirconiacores with different proximal heights fell well within the acceptable clinical ranges
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.330-332.1409.pdf
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