updated: 牙齒矯還是不矯， 這是個問題

大約在半年前俺應該在這裏谘詢過娃兒是否矯正牙齒的問題，起因是第一次潔牙師說娃兒牙齒不夠完美。

最近又去洗牙，這次同一個潔牙師專門跟牙醫討論了這個問題，結果娃兒回來告訴俺，牙醫大概是這麽說的：這孩子牙齒很好，overbite 隻有10%呢！不用矯正牙齒！

高興之餘，俺仔細研究了這個比例是啥意思，原來呀，一般正常overbite 就是3-5mm，即20-30%，超過這個的才會考慮矯正牙齒的問題，而俺娃天生隻有10%，幾乎算是沒有overbite了，自然遠遠不需要了矯正牙齒了，太好了 ！！！！！！

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Overbite

From Wikipedia, the free encyclopedia

 

Overjet or horizontal overlap.

Overbite medically refers to the extent of vertical (superior-inferior) overlap of the maxillary central incisors over the mandibular central incisors,^[1] measured relative to the incisal ridges.^[2]

The term overbite does not refer to a specific condition, nor is it a form of malocclusion. Rather an absent or excess overbite would be a malocclusion. Normal overbite is between 3–5 mm (or approximately 20–30% of the height of the mandibular incisors) and is commonly expressed as a percentage.

Young children commonly have a deep bite (excessive overbite), it is not resolved during the normal growth of the maxilla and the mandible and can get worse with time. If it is not corrected it may lead to trauma and shortening the length of the teeth due to wear and the biting edges.^{[citation needed]}