ALEXANDRIA, Va., Nov. 6 -- United States Patent no. 12,458,476, issued on Nov. 4, was assigned to KURARAY NORITAKE DENTAL INC. (Kurashiki, Japan).
"Zirconia sintered body" was invented by Shinji Harada (Aichi, Japan) and Yoshihisa Yamada (Aichi, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A zirconia sintered body may have less excess material to be removed when making a prosthesis by milling, and may provide a reduction of work time, more durability for a working tool, and a faster treatment for patients, and may undergo little deformation during firing, and provide enhanced aesthetics. A columnar zirconia sintered body may have a base and a side face, the base having a surface shape that is neither...