An orthodontic appliance that includes a polycrystalline translucent aluminum oxide ceramic material having an average grain size of no greater than 1.0 micron and a Contrast Ratio value of less than about 0.7.
申请公布号
AU2002346462(A1)
申请公布日期
2003.07.24
申请号
AU20020346462
申请日期
2002.11.11
申请人
3M INNOVATIVE PROPERTIES COMPANY
发明人
DARREN, T. CASTRO;RICHARD, P. RUSIN;WILLIAM, E., II WYLLIE
