Failure to remove distal or buccal bone while removing one of these teeth can cause the entire maxillary tuberosity to be fractured off, thereby tearing out the floor of the maxillary sinus.

在拔牙的过程中如果远端骨或颊骨移动失败就会造成整个上颌结节断裂，从而造成上颌窦底撕裂。

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Methods We collected 29 patients who wanted to do scaling, and examined the buccal or lingual surface of their posterior teeth with DD before and after scaling.

方法采用DD探测29例患者牙洁治前后颊、舌面的荧光值，分析不同的色斑计分等级对DD探测龋齿时的影响程度。

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Results 1. Plaque index for orthodontic teeth can evaluate the buccal plaque of orthodontic teeth well.

结果1正畸菌斑染色指数可以很好的评价正畸牙齿不同区域的菌斑堆积情况。

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