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 in vitro study compared the wear behavior between the enamel/dentine, two types ofdental veneering ceramics for all-ceramic restorations (Vita-alpha，Vintage -AL ). A variety offactors including hardness, fracture toughness, flexural strength, frictional coefficients, wear scarwidth, element concentrations were considered. The wear scars of the samples were characterized bydynamic atomic force microscopy (DFM). The element concentrations of the surface before/after thewear test were determined with energy dispersion spectrometry (EDS). In this study Enamel/dentine,Vita-alpha and Vintage-AL have showed good wear resistance. The results also showed that therewere statistical significance in samples. The friction coefficient varied from time in each kind ofmaterials. The analytical differences between materials were observed in wear width and propertiesof materials (p〈0.05). The wear ability among four materials ranked from highest to lowest asfollows, Vintage-AL, Vita-alpha, enamel and dentine. DFM results demonstrated the wear patterns ofnatural tooth detected as abrasive and denaturation of dental texture. Wear patterns of testedveneering ceramics consisted mainly of abrasive wear, adhesion and fatigue wear and the differentpattern plays different roles in Vita-alpha and Vintage-AL. The EDS results showed the elementconcentration of Fe was obviously found on the samples. Resistance ability against wear of veneeringceramics is better than that of natural human teeth. And the ability may have some correlation withthe ceramics mechanical properties
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.330-332.1251.pdf
Permalink
