excessive gum formation

例句：

1. 1. The patient had a history of excessive gum formation and needed to have his teeth cleaned regularly.
   这位病人有过度牙垢形成的历史，需要定期洗牙。
2. 2. The dentist advised the patient to brush their teeth twice a day to prevent excessive gum formation.
   牙医建议病人每天刷牙两次以防止过度牙垢形成。
3. 3. Studies have shown that regular dental check-ups can help prevent excessive gum formation and other dental issues.
   研究表明，定期的牙科检查可以帮助预防过度牙垢形成和其他牙齿问题。