Ceramic orthodontic appliance

Details Ceramic orthodontic appliance Ceramic orthodontic appliance

A - Human Necessities

61

C

83/1

A61C 7/02 (2006.01) A61C 7/12 (2006.01)

Patent

CA 1326382

CERAMIC ORTHODONTIC APPLIANCE Abstract An orthodontic bracket or similar orthodontic appliance is made of a polycrystalline ceramic having a translucency which minimizes visibility of the appliance when mounted on a tooth. The ceramic is formed by pressing a powder material, such as high purity aluminum oxide, and sintering to yield a single phase appliance having substantially zero porosity and an average grain size preferably in the range of 10 to 30 microns. The substantially color-free ceramic appliance has desirable strength and other mechanical properties combined with a translucency which permits the natural color of the tooth to diffusely show through in a fashion tending to make the appliance blend with and disappear against the tooth.

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