The effect of velopharyngeal insufficiency on voice quality in Estonian Children with Cleft Palate.

Most children born with cleft palate (CP) or cleft lip and palate (CL/P) have velopharyngeal insufficiency (VPI), some degree of hypernasal resonance, articulation disorders and laryngeal dysphonia. Combination of different CL/P specific problems may mask laryngeal dysphonia and therefore, it may remain undiagnosed and untreated by clinicians. The research aimed to study the effect of VPI on voice quality in Estonian CL/P children. We included 18 CL/P and 79 healthy children. Combination of objective (Multi-Dimensional Voice Program (MDVP)) and subjective (Pediatric Voice Handicap Index (pVHI), GRBAS scale, video-nasoendoscopy (VNE), video-laryngostroboscopy (VLS)) assessment methods were assisted and performed by our multidisciplinary cleft teams. We found that (1) overall quality of life is greatly affected by voice, resonance and articulation disorders in CL/P group, (2) more than half of the CL/P children had morphological changes of the vocal folds, (3) the severity of VPI did not result in worse outcomes of acoustic parameters of voice.