名词
中文翻译：牙垢形成
同义词：
['tartar formation', 'dental plaque']
例句：
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1.The dentist advised him to brush his teeth twice a day for better gum health.
牙医建议他每天刷牙两次，以保持更好的牙龈健康。
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2. The researcher found that the bacteria in the mouth can cause gum formation and contribute to tooth decay.
研究人员发现口腔中的细菌可以导致牙垢形成并促进蛀牙的发生。
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3.Gum formation is often associated with poor oral hygiene practices, such as not flossing or using a toothbrush effectively.
牙垢形成通常与不良的口腔卫生习惯有关，如不使用牙线或有效使用牙刷。