通常是在病人十岁或十一岁乳牙脱落之后开始进行治疗的。
Treatment is usually started when the patient is 10 or 11 years old, after the deciduous teeth are lost.
乳牙生理性根吸收是导致乳牙脱落的一种特有的生理性现象。
Deciduous root resorption is a physiological phenomenon that results in exfoliation of the deciduous teeth.
哺乳动物的第二套牙齿之一,它是在乳牙脱落时生长起来的。人类有三十二颗恒牙。
One of the second set of teeth in mammals that grow as the milk teeth are shed. Human beings have 32 permanent teeth.
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