名词
中文翻译：脱落的牙齿保留
同义词：
['decaying teeth retention', 'declining teeth retention']
例句：
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1. The dentist recommended a retainer to help with the loss of teeth.
牙医推荐了一个保持器来帮助牙齿丢失。
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2.The patient was advised to maintain good oral hygiene for optimal tooth retention.
病人被建议保持良好的口腔卫生以获得最佳的牙齿保留。
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3.The study found that regular dental checkups can significantly improve tooth retention.
研究发现，定期的牙科检查可以显著提高牙齿保留。