正畸托槽及颊面管中硫元素含量的标准化测定

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Abstract：The sulfur content in orthodontic brackets and buccal tubes of orthodontic medical devices was determined by high frequency infrared carbon sulfur analyzer.By optimizing sample weight，flux quality，and blank value， standardized test conditions were established， that is， sample weight 0.5g ，tungsten tin flux 1.0g ，and the ceramic cruciblewas roasted at 1000‰ for 2～4h .The linear correlation between 0.0054% and 0.079% was measured， the correlation coefficient was O.9999，and thedetectionlimitwas 0.00007% .Theprecision （RSD， n=6 ）ofthemethod was 0.64% ，and the recoverieswere 98.0%～102.5% .TheRSD of the results was 1.32% 1 （n=9 ）.Themethod hasgood precisionand fast test speed，and can meet therequirements for the determination of sulfurcontent in orthodontic brackets and buccal tubes.

Keywords： orthodontic bracket; buccal tube; sulfur content; high frequency infrared carbonand sulfur analyzer; standardized determination

0 引言

口腔健康已成为现代社会关注的焦点，特别是在口腔正畸领域。（剩余4394字）