| abstract |
(57) [Summary] [Structure] A partially stabilized zirconia sintered body, which does not substantially contain zirconia having a cubic crystal structure, and has a tetragonal crystal structure. Is contained in an amount of 95.5 mol% or more and 99% or less, Braces for orthodontics. [Effect] Not only the initial strength and toughness are high, the aesthetics are excellent, but the mechanical properties are also stable when used for a long time in actual orthodontic treatment. It can be compatible with the aesthetics inside. |