[Genioplasty. Different technics of osteotomy and their results]

After insisting on the strict and precise manner with which the clinical examination should be carried out, the author provides a detailed description of Delaire's functional genioplasty, one which has the advantage of combining physiology and esthetic. Several clinical cases are used to illustrate this surgical technic and other examples of genioplasty are described. Genioplasty is in fact a surgical act which gives excellent esthetic results, but its indications must be carefully considered.