A holistic toothpaste without fluoride may help with gum disease prevention but not tooth decay.

不含氟的全效牙膏也许有助于预防牙龈疾病，但不能预防蛀牙。

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The advice was not restricted to the prevention of tooth decay.

这个忠告并不仅仅局限于预防龋齿。

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Important tree pathogens and wood decay fungi are characterized for prevention and identification.

重要的树病原体和木头腐坏菌被用于预防和鉴定表现的特性。

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If you are removing it for prevention of tooth decay or periodontal disease such as gingivitis, which destroys the root and makes the teeth fall out then I believe it's best at night.

WSJ: How to Be a Better Flosser