Abstract
The objective of this study was to determine whether dentofacial deformities (class II and class III) influence maximum isometric tongue strength compared with a group without deformities. A total of 126 adult patients participated in the study. Of these, 45 had a class II diagnosis (14 men and 31 women) and 81 a class III diagnosis (35 men and 46 women), all of them with indication of orthognathic surgery. Fifty adult volunteers (17 men and 33 women) with no changes in dental occlusion (class I) and with no clinical signs of dysfunction of the temporomandibular joint represented the control group. Tongue strength (in N) was measured with a dynamometer. The maximum strength of the anterior portion was determined with the instrument positioned on the retroincisor region and the maximum strength of the dorsum with the instrument positioned in the region of the hard palate. Data were analysed statistically by analysis of variance (anova) and by the Pearson correlation test. No significant difference (P > 0·05) in tongue strength in the anterior or dorsal region was observed between the groups with dentofacial deformities or between these groups and the control. The tongue strength of the anterior and dorsal regions was not influenced by the dentofacial deformity.
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