金屬 Bracket의 化學的 再生處理 方法에 關한 硏究
A STUDY ON THE CHEMICAL RECYCLING METHOD OF METAL BRACKET
方常容, 李東奎,
소속 상세정보
方常容 ( ) - 朝鮮大學校 齒科大學 矯正學敎室
李東奎 ( ) - 朝鮮大學校 齒科大學 矯正學敎室
KMID : 0361919900200010103
Abstract
Metal brackets were recycled by variable methods for economic reason. Such recycling methods had a great effect on bracket slot width and bonding strength. Therefore, the recycling methods that don´t change the properties of original bracket were suggested.
In this study, debonded brackets were recycled with 30 kinds of solvents and bracket surfaces were examined by S.E.M. (Super IIIA, ISI International Scientific Instruments, Japan) and Stero Microscope (Sz-Tr, Olympus Tokyo, Japan) methods.
The following results were obtained.
l. Thermosetting resin adhesives (eq. Monolok®, Concise®) were swelled most in sulfuric acid (assays 95%) and slightly in:alcohol groups. S
2. The solvent was exchanged every 24 hours during the brackets were recycled with sulfuric acid (assays 95%)_ As the passage of time, the adhesives were removed more clearly, and after 72 hours adhesives were nearly detached from bracket baes.
3. Chemical recycled metal bracket surface showed no irregular structure by S E.M. method.
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