Purpose To investigate the relationship between lingual frenum and possible alterations in the articulation of phonemes.

Methods This is a quantitative observational study, the individual operative kind with transversal time reference. The population sample consisted of 16 individuals, each one with their phonological system complete. The data were captured through an application form that contained relevant aspects as to the qualitative-classification of the lingual frenum, quantitative-relation of mouth opening, with and without the tongue in the papillae, tongue mobility and ERT - 78 phonologically balanced words.

The data were captured through an application form that contained relevant aspects as to the qualitative-classification of the lingual frenum, quantitative-relation of mouth opening, with and without the tongue in the papillae, tongue mobility and ERT - 78 phonologically balanced words.

Inclusion Criteria:

• patients with the frenulum of the tongue - the presence of the central incisors and upper and lower side

Exclusion Criteria:

• patients in speech therapy aimed at enabling oral motor or speech - without integrity orofacial motor - patients using grid palate - with changes in the temporomandibular joint - anterior open bite

The total study population consisted of subjects with complete phonological system, ie more than seven years of chronological age, both male and female, accompanied in the field of Dentistry, University of Fortaleza - UNIFOR.