Blogs Home » Education » 為什麼新萌出的門牙切端呈“鋸齒”狀?
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為什麼新萌出的門牙切端呈“鋸齒”狀?

Posted By vickong pun     July 5, 2021    

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為什麼新萌出的門牙切端呈“鋸齒”狀?

  為什麼新萌出的門牙切端呈“鋸齒”狀?剛換的門牙切端凹凸不平,就像“鋸齒”一樣,醫學上叫它切脊結節。
是門牙一長出來就有的。等上下牙齒“各就各位”能夠互相接觸了,這些“鋸齒”就會慢慢被磨掉,牙齒就逐漸平整了。

                    

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