October 2, 2014     Japanese 
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Kuraray Develops New Flexible Zirconia
 

Tokyo, June 5, 2014 (JCN) - Kuraray Noritake Dental Inc. has developed a highly durable zirconia that possesses both high strength and superior toughness. Kuraray is pursuing the marketing of this new and unique product in the dental material and other fields.

Although the yttria partially stabilized zirconia currently in wide use is very strong, it possesses the fragility which is characteristic of ceramics. Zirconia is also known to gradually weaken over time as the crystal structure changes from a tetragonal phase to a monoclinic one when exposed to hydrothermal condition.

Kuraray Noritake Dental improved the raw materials and manufacturing processes, aiming to develop a highly reliable ceramic material. It then succeeded in developing a new type of zirconia that has both higher flexural strength and fracture toughness and, when exposed to hydrothermal condition, its crystal structure does not change to a monoclinic phase, a common cause of compromised strength.

In addition, the product does not need to be subjected to Hot Isostatic Pressing.



By Jun Ota Staff Writer

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