Malocclusion is caused by ill-developed jaws, under-developed alveolus or over-developed alveolus. If the situation is not too serious, it can be solved by orthodontic treatment. However, if the jaws discrepancy is large, orthongathic surgery is needed to solve the problem.

Basically, orthognathic surgery moves the jaws and teeth to the best position so that good occlusion and normal facial profile are resulted.