Evaluation of the effect of orthognathic surgery on articulation and speech

Abnormal occlusion is one of the most important etiologic problems in patients with dento – facial and cranio – facial abnormalities. In orthognathic surgery this parameter (occlusion) would become normal. Probably it is acceptable to correct the skeletal and occlusal problems to improve speech and articulation. This study was designed to evaluate the effect of orthognathic surgery on articulation and speech on 1999 in Taleghani Hospital. Methods & Materials: This clinical trial study was performed cross – sectionally on 18 patients that consist of 5 male and 13 females. All patients had dentofacial deformities. BSSRO osteotomy and bimaxillary ostetomy were performed on each patient to correct their skeletal deformities. There was no palatal defect or dentocranial problem, mental retardation and hearing problem in the patients. Phonetic test was done before surgery. This test was repeated 6 months after surgery. Findings before and after surgery were evaluated and data were compared with paired t - test. Results showed significant changes after surgery which means these kind of surgery have a positive effect on speech and articulation. It seems an advantage to use orthognathic surgery with speech therapy to improving speech and articulation.