Type of orthodontic problems

Related to size:

In general, there should be a harmony between the size of the teeth and the size on the jaw (bone) carrying them. If the total size of the teeth is bigger than the available room the bone can provide then the teeth will be crowded. In the other hand, If the total size is smaller we see the spacing between the teeth.

Related to Number of Teeth:

In certain cases, there might be a congenital absence of one or more of the teeth. Some individuals develop extra teeth in their jaw causing a space problem.

Jaws Disharmony

These are the anomalies related to the relation between the upper and lower jaw. Normally there is a certain proportion between the sizes of the upper and lower jaws. When this harmony is disturbed different kind of malocclusion might appear. The following is the basic classification between the jaws:

Class I Relationship:
When there is a harmony between the upper and lower jaws

Class II Relationship:
When the upper jaw is in advanced position compared to the lower jaw. It might be because the upper jaw is too big or the lower is too small .or both. Class II malocclusion has two subdivisions:

Class II Division I:
When there is a big “overjet” between the upper and lower incisors. The Overjet refers to the extent of horizontal (anterior-posterior) overlap of the maxillary central incisors over the mandibular central incisors.

Class II division II:
When the upper incisors are inclined lingually touching the lower incisors.

Class III relationship:
When the lower jaw is in advanced position compared to the upper jaw.