A - Human Necessities – 61 – C
Patent
A - Human Necessities
61
C
83/1
A61C 7/14 (2006.01) A61C 7/12 (2006.01) C04B 35/111 (2006.01)
Patent
CA 2029345
ABSTRACT An orthodontic bracket made of a translucent alumina ceramic containing at least 99.9% by weight of alumina and composed of crystals having an average grain size of from 1.8 to 3.0 µm, wherein the transmittance of light with a wavelength of 600 nm passing through a sample thereof having a thickness of 1 mm is at least 5%, and the flexural strength is at least 50kg/mm2.
Akiyama Takashi
Arakawa Toshihiko
Kosugi Naoki
Nagasaki Yuichi
Marks & Clerk
Tosoh Corporation
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