title: Influence of orthognathic surgery on voice fundamental frequency.
abstract: Considering that orthognathic surgery promotes changes in orofacial structures constituting the resonating system, functional changes secondary to surgery are expected to affect speech, leading to the need for further speech and voice adjustments. Thus, understanding the possible relationships of these structures with voice production is important. Therefore, this study aimed to describe the changes in voice fundamental frequency of a patient submitted to orthognathic surgery and observe if there is a relationship with hyoid bone positioning at the different treatment periods. The results revealed that voice fundamental frequency increased after surgery, returning to values close to the preoperative condition, which corresponded to vertical movement of the hyoid bone.
authors.affiliation: Department of Speech, Bauru Dental School, University of São Paulo, São Paulo, Brazil.
authors.forename: Tatiane M
authors.initials: TM
authors.lastname: Jorge
authors.forename: Alcione G
authors.initials: AG
authors.lastname: Brasolotto
authors.forename: Eduardo S
authors.initials: ES
authors.lastname: Gonçales
authors.forename: Hugo Nary
authors.initials: HN
authors.lastname: Filho
authors.forename: Giédre
authors.initials: G
authors.lastname: Berretin-Felix
mesh_terms: D000328:Adult; D002508:Cephalometry; D002680:Chin / Q000601:surgery; D005260:Female; D006801:Humans; D006928:Hyoid Bone / Q000473:pathology; D008313:Malocclusion, Angle Class III / Q000601:surgery*; D008437:Maxilla / Q000002:abnormalities / Q000601:surgery; D009971:Orthodontics, Corrective; D010027:Osteotomy / Q000379:methods; D019340:Osteotomy, Le Fort / Q000379:methods; D011378:Prognathism / Q000601:surgery; D013018:Sound Spectrography; D013060:Speech / Q000502:physiology; D014716:Vertical Dimension; D014831:Voice / Q000502:physiology*; D014833:Voice Quality / Q000502:physiology