What is deep bite? A deep overbite or deep bite occurs when the lower front teeth bite too close or into the gum tissue behind the upper front teeth in the roof of the mouth. ... A deep bite can damage the health and function of your jaw and may cause damage to your teeth and gums. Does a deep bite need to be corrected? A deep bite can be easily corrected these days with one of the many effective orthodontic and restorative treatment options. ... Missing back teeth in an adult can create or exacerbate a 'deep bite' leading to collapse of the bite and lower face, giving a more aged appearance.