Introduction: In Brazil, there are estimates of cleft palate occurrence in 1/650 individuals born alive. Beyond the esthetics changes, this abnormalities also affects chewing, deglutition, speaking functions, and especially the voice. Furthermore, when the velopharyngeal sphincter closure is compromised, we find nasality excesses in the voice production, which affects the speech understanding even more. Around 20 to 30% of the patients after palatoplasty present different levels of velopharyngeal sphincter dysfunction that results in speech production changes. The speech therapy, despite its importance, in serious cases does not demonstrate enough sufficiency to improve the speaking, and for the voice of patients it is necessary to use the palatal obturators to help the velopharyngeal sphincter dysfunction.