Effect of Sintering Times on Mechanical Properties of Dental Zirconia Material

Journal of Nanjing Medical University

Zirconia material is one of the most widely used clinical restoration materials due to its better mechanical properties, aesthetic effects, good biocompatibility and corrosion resistance. It is often used in full crowns, pile crowns, bridges and other type of restorations.


However, clinically, zirconia restorations sometimes have poor aesthetic effects or flaws in the design and production process of the restoration, and need to be treated with color or rework. These processes involve multiple sintering times of the restoration, which has led to concerns on the safety issues of sintering zirconia materials after multiple sintering times.

It is verified by experiments that the increase in the number of sintering has no effect on the bending strength and fracture toughness of zirconia, nor does it accelerate the low-temperature aging process of zirconia materials, indicating that repeated sintering has no obvious adverse effect on the mechanical properties of zirconia.

Article number: 1007-4368 (2017) 01-0117-04


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