This link contains of information’s on SPEECH THERAPY FOR MARGINAL VELOPHARYNGEAL INSUFFICIENCY. This abstract says about the Purpose, methods and results of the Speech Therapy. There was an analysis made by selecting fifteen patients with MVPI and where given the treatment of speech therapy for 12 to 20 weeks and the result was found to be better than those before therapy. After the therapy the pronunciations where found to be improved.
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[A preliminary study on speech therapy for marginal velopharyngeal insufficiency].