JPS6452448A - Orthodontic bracket - Google Patents

Orthodontic bracket

Info

Publication number
JPS6452448A
JPS6452448A JP20927087A JP20927087A JPS6452448A JP S6452448 A JPS6452448 A JP S6452448A JP 20927087 A JP20927087 A JP 20927087A JP 20927087 A JP20927087 A JP 20927087A JP S6452448 A JPS6452448 A JP S6452448A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
oxide
transparent
bracket
spinnel
aluminum
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP20927087A
Other versions
JP2590485B2 (en )
Inventor
Koji Tsukuma
Kiyoshi Oda
Yuichi Nagasaki
Original Assignee
Tosoh Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

Links

Abstract

PURPOSE:To provide a transparent ceramic bracket prevented from brittleness and chipping and excellent from the aspect of a fine view, by using transparent ceramics having a spinnel type crystal structure consisting of magnesium oxide and aluminum oxide. CONSTITUTION:Spinnel ceramics is represented by MgAl2O4 wherein a MgO/Al2 O3 mole ratio is 1:1 and can be present as one having a transparent spinnel type crystal structure even when said ratio is shifted slightly. In order to obtain material quality for a bracket, it is pref. to employ a hot press method. For example, a powder prepared by the wet mixing of magnesium oxide and aluminum oxide is used as a starting raw material to fill a graphite mold and subsequently heated to 1,350-1,450 deg.C under vacuum while pressurized under pressure of 200-800kg/cm<2> to be held at that temp. for 1-2hr before reduced in pressure and gradually cooled. Further, when the treated one is again heated to 1,000-1,200 deg.C in air, an objective sinter is obtained.
JP20927087A 1987-08-25 1987-08-25 Orthodontic bracket Expired - Lifetime JP2590485B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20927087A JP2590485B2 (en) 1987-08-25 1987-08-25 Orthodontic bracket

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20927087A JP2590485B2 (en) 1987-08-25 1987-08-25 Orthodontic bracket

Publications (2)

Publication Number Publication Date
JPS6452448A true true JPS6452448A (en) 1989-02-28
JP2590485B2 JP2590485B2 (en) 1997-03-12

Family

ID=16570166

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20927087A Expired - Lifetime JP2590485B2 (en) 1987-08-25 1987-08-25 Orthodontic bracket

Country Status (1)

Country Link
JP (1) JP2590485B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991006257A1 (en) * 1989-10-27 1991-05-16 Japan Institute Of Advanced Dentistry Orthodontic bracket, bracket kit and bonding method of the bracket
JP2010047460A (en) * 2008-07-22 2010-03-04 Schott Ag Transparent ceramic, its producing method, and optical element using the transparent ceramics
US9717569B2 (en) 2008-11-14 2017-08-01 Ormco Corporation Surface treated polycrystalline ceramic orthodontic bracket and method of making same

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63174646A (en) * 1987-01-12 1988-07-19 Sumitomo Chemical Co Orthodontic material

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63174646A (en) * 1987-01-12 1988-07-19 Sumitomo Chemical Co Orthodontic material

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991006257A1 (en) * 1989-10-27 1991-05-16 Japan Institute Of Advanced Dentistry Orthodontic bracket, bracket kit and bonding method of the bracket
JP2010047460A (en) * 2008-07-22 2010-03-04 Schott Ag Transparent ceramic, its producing method, and optical element using the transparent ceramics
US9717569B2 (en) 2008-11-14 2017-08-01 Ormco Corporation Surface treated polycrystalline ceramic orthodontic bracket and method of making same

Also Published As

Publication number Publication date Type
JP2590485B2 (en) 1997-03-12 grant

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