One of the problems of the jaw is the back of the lower jaw, which in more than 40 The percentage of children is also observed.
But many parents mistakenly think that because it is bad grown-up teeth in the mouth. While the reason behind the lower jaw teeth, have grown in bad shape. زمانی که بیمار به مشکل عقب بودن فک پایین دچار شده است، لب ها هم بر روی هم قرار نمی گیرند.به طوری که دندان های فک بالا جلوتر به نظر می رسند و به تبع آن، لب بالا هم بالاتر قرار می گیرد که چهره را more ugly show.
So treat this condition is essential.
The reason behind the lower jaw
Perhaps you've seen the people who are behind the lower jaw of the upper jaw.
At first glance it is believed that they too come forward maxillary.
But in fact, the lower jaw is gone backward or not developed enough.
About 3 Today, the percentage of the world's population suffers from this abnormality, the reasons of which are::
Small lower jaw
Imagine the lower jaw is too small, then your teeth will move in the same small space and do not attempt to move the jaw. Over time, the upper jaw to its normal growth continues. This makes the imbalance between the upper and lower jaws is.
Small teeth in the lower jaw
When the lower jaw teeth small, not much effort for bigger jaws are moved in the same small space. Because of the lower jaw behind the jaw remains high. Over time and with age, the disorder shows itself more. So that the bottom of the maxillary jaw fell behind early young age.
Bad habits
Some children habits and behavior in normal lower jaw to hold back. This habit over time cause behind the lower jaw in them. So that growth will be lower than the upper jaw.