Orthodontic highly-transparent ceramic bracket and making method thereof

A technology of transparent ceramics and brackets, applied in the direction of brackets, etc., to achieve the effect of lowering sintering temperature, easy operation and high transparency
CN103263302AInactive Publication Date: 2013-08-28SICHUAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SICHUAN UNIV
Publication Date
2013-08-28
Estimated Expiration
Not applicable · inactive patent

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Abstract

An orthodontic highly-transparent ceramic bracket comprises a baseboard, and trough limbs, a trough slot and a ligation limb slot which are arranged on the baseboard, and the ceramic bracket is a yttrium aluminum garnet ceramic bracket, a magnesium aluminate spinel ceramic bracket or a spinel aluminum oxynitride ceramic bracket, and has a linear transmittance of above 70%. A preparation method of the highly-transparent ceramic bracket comprises the following steps: 1, slurry preparation: ball-milling raw materials with Al2O3 balls as a ball milling medium for 24-48h, wherein the raw materials comprise transparent ceramic powder, a composite sintering aid, polyacrylic acid and deionized water, the composite sintering aid accounts for 0.1-0.6% of the weight of the transparent ceramic powder, polyacrylic acid accounts for 1-5% of the weight of the transparent ceramic powder, the ratio of the total weight the transparent ceramic powder, the composite sintering aid and polyacrylic acid to the weight of deionized water is 1:4-8, and the transparent ceramic powder is yttrium aluminum garnet ceramic powder, magnesium aluminate spinel ceramic powder or spinel aluminum oxynitride ceramic powder; 2, molding and biscuit treatment; and 3, sintering.
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Description

technical field

[0001] The invention relates to a ceramic bracket used in orthodontic technology and a preparation method thereof. Background technique

[0002] Brackets are a device that must be used in orthodontic technology. An ideal bracket should not only have biocompatibility, high strength and wear resistance, but also match the color of human teeth. Ceramic brackets have incomparable advantages over other material brackets in terms of color, luster, wear resistance and biocompatibility. Since ceramic brackets were introduced into the field of orthodontics in 1986, various types of ceramic brackets have been widely used. Used in orthodontic clinic. At present, the orthodontic ceramic brackets are mainly made of Al 2 o 3 Ceramic or ZrO 2 Ceramic preparation. Thanks Al 2 o 3 and ZrO 2 Factors such as the anisotropy of the material structure make it difficult to achieve high transparency for this type of ceramic bracket. Therefore, the matching of the bracket and...

Claims

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