9歲小男孩牙齒發黃該怎麽處理?平時也正常刷牙,定期看牙醫了,但最近一段時間牙齒很黃,是怎麽回事?謝謝先
9歲小男孩牙齒發黃該怎麽處理?平時也正常刷牙,定期看牙醫了,但最近一段時間牙齒很黃,是怎麽回事?謝謝先
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