If the tooth isn't kept clean by toothbrushing and dental flossing, the pain will be more severe.
假如没有利用刷牙或牙线把牙齿保持清洁，那么会疼得更厉害。
A recent systematic review suggested the superiority of certain modes of powered over manual toothbrushing for plaque and gingivitis reduction.
最近的一篇系统性回顾显示在控制牙菌斑及降低牙龈炎的发生上，特定模式的电动牙刷比手动牙刷有效。
To compare different modes of powered toothbrushing against each other for plaque reduction and the health of the gingivae.
比较各种不同模式的电动牙刷，对于牙菌斑的减少和牙龈的健康的效果。
To compare different modes of powered toothbrushing against each other for plaque reduction and the health of the gingivae.
比较各种不同模式的电动牙刷，对于牙菌斑的减少和牙龈的健康的效果。
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