Generally speaking, most people have some cases where the upper teeth cover the lower teeth

       If the degree of wrapping is within the normal range, there is no problem. If the degree of wrapping is deep, there may be a problem of deep coverage or deep coverage.

       Although these two situations sound like the same thing, they are actually very different.

       1、 What is deep cover

       Deep overbite is a malocclusion caused by abnormal vertical development of maxillary and mandibular arch and / or maxillary and mandibular.

       Our normal occlusal relationship is that the upper teeth cover 2-3 mm of the lower teeth, and the upper anterior teeth protrude slightly forward by about 2 mm than the lower anterior teeth. Intuitively, the upper anterior teeth cover about 1 / 3 of the crown of the lower anterior teeth.

       Generally speaking, from the front, the lower teeth are blocked by the upper teeth, and the exposed part is very small. If the upper tooth covers the lower tooth by more than 2 ~ 3mm, it is deep coverage.

       2、 What is deep coverage

       Deep coverage is that the horizontal distance between the upper and lower incisors is too large, which is mainly the relationship between front and back. Deep coverage of anterior teeth refers to the case where the maximum horizontal distance from the cutting end of the upper anterior teeth to the labial surface of the lower anterior teeth exceeds 3mm.

       The simple understanding is that deep coverage is the position of the upper anterior teeth closer to the front than the lower anterior teeth, more than 3mm above the normal, which is common in the buckteeth with obvious protrusion.

       3、 Causes

       In addition to congenital genetic factors, acquired environment and bad oral habits will also lead to this malocclusion.

       For example, long-term consumption of fine, soft and viscous food, teeth and jaws can not get good physiological stimulation due to lack of chewing exercise, resulting in insufficient or abnormal development of jaw and dental arch.

       This will affect the normal occlusal relationship and facial development, and have a negative impact on oral health and facial appearance.

       4、 Effect on maxillofacial region

       Impact of deep overburden

       1. It will lead to the shortening of the lower half of the face, which will affect the beauty of people's face.

       2. Affect oral health.

       3. The deep overburden of young children can sometimes improve with their growth and development, but serious overburden will make the lower teeth top to the hard palate mucosa of the upper jaw (the gum in the upper lingual side) so that they can't bite; At the same time, it has great damage to the alignment of lower teeth and periodontal condition.

       Impact of deep cover

       1. Cause the mouth to bulge and cannot close, thus affecting the beauty of people's face.

       2. Affect pronunciation, for example, the pronunciation beginning with F is not standard.

       3. Affect oral health, make teeth difficult to clean and increase the risk of caries.

       4. Protruding teeth also increase the risk of trauma after a fall.