Damaged teeth and Gums Yellow teeth are one of the most notorious effects of long-term.

牙齿和牙龈受损长年吸烟会导致大黄牙这是众人皆知的事情了。

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Objective to analyze the effect of preserving severely damaged teeth such as stubbed tooth root, crown and vertically fractured tooth through compositive therapy.

目的利用综合治疗，对残根、残冠、纵折牙等严重缺损牙进行保存治疗并分析其疗效。

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This means the teeth, which grow continuously, can regularly shed damaged areas to keep a well-honed edge.

这就意味着，这些不断生长的牙齿，可以有规律地脱落磨损部分，以保持边缘锋利。

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Bob Thompson says the free clinic was the only way he could get help for his teeth, which were damaged in an accident.

VOA: standard.2009.06.13

Fixing damaged teeth is difficult and expensive, according to Puskas.

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