[Changes in the nasal pyramid in osteotomy of the maxilla].

The correction of dento-facial deformities with Lefort I osteotomy are always accompanied by changes in soft tissue and skeleton. But, in many cases there is also modification of the low floor of the nose and profile changes. This clinical experience has been confirmed in the Laboratory on cadavre experimentation. Three deplacements have been studied: advancement of maxilla, inferior repositioning of maxilla and superior repositioning of maxilla. Often, Lefort I osteotomy is a complex association of these movements; modifications are also function of soft tissue. Operation must necessary provide theses technical modification for a real adaptation of the surgery. The surgical technique must therefore be adapted in order to obtain the best aesthetic result.