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The aim of this study is to estimate the prevalence of orofacial dysfunctions in a sample of Bulgarian kindergarten children with primary dentition. 471 girls and boys participated in this observational crosssectional epidemiological study. The presence of non-nutrive sucking behaviors, open mouth posture, nasal breathing impairment, swallowing pattern and symptoms of speech disorders were assessed and analyzed. 31% of the examined children have a harmful sucking habit. An open mouth posture was observed in 46.1% of all children, while impaired nasal breathing was assessed in 19.6% of the subjects. Infantile swallowing was preserved in 37% of all participants and 4.2% of the children were registered with symptom of speech disorders. The early detection and diagnosis of environmental etiologic factors may be an important step to prevent malocclusions in children with primary dentition. Regular monitoring of the functional status allows timely orthodontic prevention and an early treatment according to each child’s individual needs.

Prevalence of Orofacial Dysfunctions And Oral Habits in A Sample of 4-5-Year Old Bulgarian Children