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乳牙的萌出有什麽規律？

Posted By vickong pun     July 7, 2021    

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乳牙的萌出有什麽規律？


    　　



    乳牙的萌出有什麽規律？



    　　乳牙的萌出有什麽規律？寶寶的20個乳牙萌出是有順序的，雖然不一定一成不變，但 是也可以作爲參照的依據,原則上是左右對稱，其中上下颌的第一磨牙和上下颌磨牙的萌岀時間則大致相當。

    以下是乳牙長牙順 序，出牙時間，牙的位置。

    

    (1)上颌牙齒中切牙 8?2個月 2 側切牙 9?13個月 3 尖牙 16?22個月 7 第一磨牙 13?19個月 5 第二磨牙 25~33個月 10

    (2)下颌牙齒 第二磨牙 23?31個月 9 第一磨牙 14?18個月 6 尖牙 17?23個月 8 側切牙 10?16個月 4 中切牙 6—10個月 1

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