[Posterior vertical excess: surgical impact].

Maxillary posterior hyperplasy is a frequent dento-facial deformity. A dento-alveolar origin seems to be more frequent than a squelettic one; in our experience, there is a direct relationship between the volume of the tongue and the open bite--surgical correction was done with a LE FORT 1 osteotomy and a tongue reduction was done simultaneously in half of the patients--a sliding genioplasty sometimes was done to improve the profile--for us, post chirurgical relapse was frequent with patients without tongue reduction.