Wear of low-fusing dental porcelains.
BACKGROUND
The resistance of wear of dental porcelains is of concern when selecting a material for metal-ceramic and all-ceramic restorations.


OBJECTIVE
An in vitro investigation was performed to rank a number of dental porcelains with respect to their wear-resistance properties. Material and methods. The wear test of 9 dentin porcelains was carried out on a wear test machine and the amount of wear was measured as the reduction of height of the specimens. The surface hardness and surface roughness were also considered.


RESULTS
Resistance of wear was lowest for Finesse porcelain, and highest for Creation porcelain. Surface hardness values of the porcelain were quite similar for all porcelains but could be classified into 3 groups with Finesses and Vita Alpha porcelains as the softest and Creation porcelain as the hardest material.


CONCLUSIONS
The low-fusing porcelain Finesse showed less abrasion resistance in comparison with Ducera Gold and Ti-Ceram porcelains. Among the high-fusing types, Vita Alpha porcelain was more wear-disposed than the others.
Derand
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Public Dental Service, Norberg, Sweden. Per.Derand@Sala.mail.telia.com
Vereby
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P
D000704:Analysis of Variance; D003776:Dental Porcelain / Q000737:chemistry*; D019554:Dental Restoration Wear / Q000706:statistics & numerical data; D006244:Hardness; D006801:Humans; D008422:Materials Testing / Q000379:methods / Q000706:statistics & numerical data; D008855:Microscopy, Electron, Scanning; D013499:Surface Properties
D003776:Dental Porcelain