Hypertonias, observed at stomatognatique level, pathologic expressions of striated musculature may have the opportunity of a large palette of therapeutical ways, so clasics as drugs therapy, and so well the modern therapy injection with botulinic toxin, type A Dysport. The choice upon the type of myorelaxation treatment proper to each case depends upon the severity of manifestations at muscular level, frequently a mixed therapy being the option of choice, based on the superposition of different treatment means. The use of botulinic toxin in the treatment of stomatognatic system dysfunctions is without the morphological impact quickly installed therapeutic effect and it has only short term effects.