variance extracted
方差提取
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The effect of root irrigation on removing canal debris and the variance of apical foramen pressure on extracted teeth were compared between the conventional irrigation and CANS irrigation.
并比较了该方法与常规方法对离体牙进行根管清洗时，根管内碎屑清洗的效果和根尖孔的压力变化。
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