Phonation involves the participation of fixed and mobile structures that need to act in a synergistic manner to produce the correct sounds.The malocclusions may favor the appearance of inappropriate articulation points, contributing to the distortion in the production of phonemes, ie, for the appearance of lisp.According to Machado (2006), the lisp may be related to deleterious habits, change shape or position of the structures of the stomatognathic system, malocclusion and facial typology.These distortions appear in the speech of children with relativefrequency, but eventually disappear with the growth and development. However, these changes may remain in adulthood, impairing their communication. This is a retrospective study, where we use as a data source protocols collected in the field of Phoniatrics of the Department ofHuman Communication Disorders Department of Speech Pathology, in the years 2008 to 2010. All protocols will be considered for patients who experience lisp, lateral or anterolateral anddental malocclusion.The following variables are collected: the presence of lisp(anterior, lateral or anterolateral), the type of occlusion (Class I, Class II division 1 subjects, Class II, Division 2 or Class III Angle), the type of overjet(normal, the previous top, previous cross-marked or earlier, after the top, rear top, rear cross, later afuncional) and overbite(normal, open, deep or top), dentition (mixed or permanent).Therefore, this research aims to study the frequency of occurrence of the lisp on dental malocclusion.
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