Crowding: Teeth may be crowded because the small dental arch (Jaw bone) or large teeth, Impacted teeth (teeth that should have come in, but have not), and extra Teeth. Poor chewing ability and undesirable appearance may all result from crowded teeth.

Overjet: Upper front teeth that protrude beyond the lower front teeth, caused by problems in jaws bone growth, short lower jaw comparing to the upper jaw, childhood habits like thumb and finger sucking that cause a protrusion of the upper front teeth.

overbite: When the front upper teeth cover most of the lower teeth when biting down or When the lower front teeth bite into the palate or gum tissue behind the upper front teeth, significant bone damage and discomfort can occur.

Open bite: An open bite results when the upper and lower font teeth do not touch when biting down. This will make chewing less efficient and may contribute to significant tooth wear, in addition to the unattractive look on the front teeth.

Spacing: If teeth are missing or small, or the dental arch is very wide, space between the teeth can occur. poor appearance seems to be the main complain in this case.

Crossbite: when the upper teeth bite inside the lower teeth (toward the tongue). Crossbites of both back teeth and front teeth should corrected early due to biting and chewing difficulties.

Underbite or lower jaw protrusion:  Lower jaw that is  longer than the upper jaw. This can cause the lower front teeth to protrude ahead of the upper front teeth creating a crossbite. Surgical treatment might be needed to correct the problem in some severe cases.