Wear evaluation of the human enamel opposing different Y-TZP dental ceramics and other porcelains
I am doing more and more zirconia based restorations. You should try Zirconia crowns if you have not done so. MJ
Abstract
Purpose
This
study examined the wear resistance of human enamel and feldspathic
porcelain after simulated mastication against 3 Zirconia ceramics,
heat-pressed ceramic and conventional feldspathic porcelain.
Materials and methods
Human
teeth and feldspathic porcelain cusp were tested against ceramic discs.
5 brands were tested- 3 monolithic zirconia, Prettau, Lava, and
Rainbow, one lithium disilicate, IPS e.max Press, and one feldspathic
porcelain, Vita-Omega 900. The surface was polished using a 600 grit and
1200 grit SiC paper. Each group was loaded for 300,000 cycles in a
chewing simulator. The wear resistance was analyzed by measuring the
volume of substance lost. The wear surfaces were observed by scanning
electron microscopy to determine the wear characteristics.
Results
Vita-Omega
900 led to the greatest amount of enamel wear followed by IPS e.max
Press, Prettau, Lava and Rainbow. There was a significant difference
between Vita-Omega 900 and IPS e.max Press (p < 0.05).
The wear values for human enamel were significantly greater than those
for feldspathic porcelain, regardless of the surface roughness of the
ceramic specimens (p < 0.05).
Conclusion
The
wear behavior of human enamel and feldspathic porcelain varies
according to the type of substrate materials. On the other hand, 3
zirconia ceramics caused less wear in the abrader than the conventional
ceramic.
Clinical Significance
Dental
professionals should be aware of the wear effect of dental restorations
on the opposing teeth or restorations. The amount of enamel wear was
highest in feldspathic porcelains whereas zirconia ceramics caused less
wear on the opposing teeth.
Comments