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何謂“六齡牙”？

Posted By vickong pun     July 8, 2021    

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何謂“六齡牙”？

　　何謂“六齡牙”？當孩子6、7歲時，上下頜最後1顆乳牙的後面可長出1顆很大的牙齒，醫學上叫它第一恒磨牙，因為它在6歲左右萌出，所以也叫它“六齡牙”。
它不替換任何乳牙。

                    

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