Abstract
Statement of Problem- Wear behaviour of a restorative materials is an important mechanical property to be considered during selection. Dental ceramics have been the mainstay of esthetic dentistry for more than 100 years. However, dentists remain suspicious about its potential abrasivity. Newer ceramics are being considered to be more wear friendly. Methodology- The present study evaluated and compared the wear resistance of one conventional dental ceramic, one low fusing ceramic and one heat pressed ceramic against human enamel. Human enamel specimens were taken as control. Wear simulation was performed in a pin on disc wear system with 18 N load, 120 rpm speed for 20000 cycles. Wear rate and loss of height was calculated for all specimens and subjected to one was ANOVA followed by post hoc Tukey b analysis. Results- Ceramics exhibited lower wear rate than human enamel specimens (p<0.05). Among ceramics heat pressed ceramics showed least wear. For antagonist wear conventional ceramics and low fusing ceramics caused similar (p>0.05) wear of enamel antagonists which was higher than heat pressed ceramics (p<0.05). Conclusion- Newer ceramic formulations are more wear resistant than conventional ceramics and cause less wear of opposing teeth.
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