An orthodontic bracket is made of a partially crystallised glass material. The orthodontic bracket has a thin compressive outer crystalline layer (38). A method of making the bracket comprises forming the bracket from the glass material and subjecting it to a heat treatment to cause crystallisation of the outer layer.
申请公布号
DE69004336(T2)
申请公布日期
1994.02.24
申请号
DE1990604336T
申请日期
1990.05.22
申请人
ORMCO CORP., GLENDORA, CALIF., US
发明人
FARZIN-NIA, FARROKH, INGLEWOOD, CALIFORNIA 90302, US;PETTICREW, RICHARD WILLIAM, ODESSA, FLORIDA 33566, US
