Orthodontic problems can be divided into three general categories depending on the arrangement of the upper and lower teeth.
Dental problems: There is no skeletal disorder between the upper and lower jaw. There are ONLY dental problems such as “crooked teeth”, teeth in wrong placement, spaces between the teeth, crowded teeth, etc.
Skeletal imbalance between upper and lower jaw: In this category there is a skeletal disorder between the upper and lower jaw where the lower jaw is in located in a posterior position. This position causes problems in biting and in facial aesthetics.
Skeletal abnormalities: This category includes skeletal abnormalities between the upper and lower jaws meaning that the lower jaw protrudes from the upper jaw or the upper jaw is behind the lower jaw or to the extent that both of these conditions are combined. The upper jaw combined with the lower jaw creates problems in the bite and the external appearance of the face (facial aesthetics).