Orthognathic surgery (OS) is a surgical intervention that alters relationships of the jaws and dental arches. The treatment involves a combination of orthodontics and maxillofacial surgery.
It is used to correct dentofacial deformities that cannot be treated with acceptable results by conventional orthodontics.
The first description of a surgical intervention to correct a malocclusion was by Hullihen in 1849.
The most frequently used surgical procedures for correcting the relationship of the jaws are Le Fort I osteotomy and sagittal ramus split osteotomy.
Also often used are vertical ramus osteotomy, inverted L osteotomy, and variations and combinations of the above.
Le Fort I was already described in 1867 and in 1953, Obwegeser introduced the sagittal split osteotomy.
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