定做矫正器，来自桶形石膏夹制备的嘴和牙齿模具，显著降低呼吸暂停-呼吸减慢指数，而热塑性矫正器则无效。

The custom-made devices, created using a plaster cast of the patient's mouth and construction bites, significantly reduced the apnea-hypopnea index, whereas the prefabricated devices did not.

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指数是无效的，当它比数组的下限或大于或等于其包含的元素数量降低。

Index is invalid when it's lower than array's lower bound or greater or equal than number of elements it contains.

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结果使用纳米银-托玛琳复合材料的受试者牙龈指数显著降低（P <0 .0 1 ） ，但对牙周袋的改善无效果。

Results Two weeks after treatment, gingival index(GI) of nano silver tourmaline composite group was decreased significantly( P <0.01), but the periodontal pocket depth didn't have any change.

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