Overjet is the distance that the upper front teeth extend out in front of the lower teeth. Excess overjet can be caused by protruding upper teeth but may also be caused by lower teeth or the lower jaw not extending far enough forward and can also be the result of a small lower jaw.
Overbite is the vertical overlap of the front teeth. A deep overbite occurs when the upper front teeth excessively overlap the lower front teeth. In many cases, a deep overbite results in excess wear on the front teeth and may result in the lower teeth biting into the roof of the mouth.
A crossbite occurs when any of the upper teeth fit inside the lower teeth. This can cause premature tooth wear and misaligned jaw growth. A crossbite of the back teeth is usually caused by a narrow upper jaw and is often corrected by palatal expansion.
As the name implies, an openbite is when the bite is open or separated. An openbite can make chewing difficult and often results in excessive function and wear of the other teeth that do bite together.
Crowding occurs when teeth are too large in relation to the jaw bones. Crowding can often be corrected by expanding the mouth thereby avoiding tooth removal.
Spacing problems may be caused by teeth that are small in relation to the jaw size. Spacing may also occur in combination with protruding teeth or be caused by missing teeth.
DENTAL MIDLINES THAT DON’T MATCH
This problem is often caused when the bite does not fit and match appropriately. This asymmetry may negatively impact the health of the jaw joints, create excessive tooth wear and may enhance additional asymmetric growth in a child.
An underbite is when the lower front teeth protrude out in front of the upper teeth. An underbite can also be described as a complete “crossbite” of the front teeth. An underbite may be caused by combination of a small upper jaw and/or a large lower jaw.