Nasolabial angle and orthognathic surgery.

The aim of orthognathic surgery is to achieve a Class I bite and enhance the esthetics of the face. The surgeon takes into account the volume of the nasal pyramid and the position of the upper lip when deciding on maxillary displacement. It is sometimes necessary to associate jaw surgery with cosmetic rhinoplasty in order to achieve the optimal facial outcome. In this setting, the principle underpinning morpho-functional surgery is fully expressed. Several examples will illustrate these techniques.