PURPOSE: To verifying whether orthodontic-surgical treatment results in modification on the signs and symptoms of temporomandibular dysfunction in individuals with dentofacial deformities. METHODS: Twenty patients of both genders (ages between 15 and 44 years) with different dental-occlusion and facial characteristics, submitted to mandibular and/or maxillary osteotomy, participated in this study. All patients presented at least one sign or symptom of temporomandibular dysfunction, verified through interview and clinical evaluation carried out before and after 30 to 60 days of the orthognathic surgery. The final evaluation investigated the presence of pain on palpation of masticatory and cervical muscles, and temporomandibular joint pain; auscultation of the temporomandibular joints was performed, and jaw movements were measured. RESULTS: All symptoms investigated in the interview decreased after the orthognathic surgery. Regarding mandibular movements, there was a significant decrease in postoperative mandibular opening, and little variation was observed in measures of lateral excursions. It was also noticed a decrease of pain in cervical muscles. CONCLUSION: The orthodontic-surgical treatment resulted in short term decrease of the investigated symptoms and clinical signs of pain in cervical muscles, and reduction of mandibular opening in patients with dentofacial deformities.Clinical trials register: 083578.