Ceramic orthodontic appliance

Details Ceramic orthodontic appliance Ceramic orthodontic appliance

1988-09-21

1990-09-04

Wilson, John J.

Dentistry

Orthodontics

Bracket

A61C 300

Patent

active

049540807

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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