title: Impact of malocclusion and orthognathic reconstruction surgery on resonance and articulatory function: an examination of variability in five cases.
abstract: Articulatory patterns and nasal resonance were assessed before and 6 months after orthognathic reconstruction surgery in five patients with dentofacial deformities. Perceptual and physiological assessments showed disorders of nasality and articulatory function preoperatively, two patients being hyponasal, and one hypernasal. Four patients had mild articulatory deficits, and four had reduced maximal lip or tongue pressures. Operation resulted in different patterns of change. Nasality deteriorated in three patients and articulatory precision and intelligibility improved in only one patient and showed no change in the other four. Operation improved interlabial pressures in three patients, while its impact on tongue pressures varied, being improved in one case, deteriorating in one, and remaining unchanged in the other three. The variability in the results highlights the need for routine assessment of speech and resonance before and after orthognathic reconstruction.
authors.affiliation: Department of Speech Pathology & Audiology, The University of Queensland, Brisbane, Qld, Australia. liz.ward@mailbox.uq.edu.au
authors.forename: E C
authors.initials: EC
authors.lastname: Ward
authors.forename: M
authors.initials: M
authors.lastname: McAuliffe
authors.forename: S K
authors.initials: SK
authors.lastname: Holmes
authors.forename: A
authors.initials: A
authors.lastname: Lynham
authors.forename: F
authors.initials: F
authors.lastname: Monsour
mesh_terms: D000293:Adolescent; D000328:Adult; D001184:Articulation Disorders / Q000209:etiology* / Q000601:surgery; D016022:Case-Control Studies; D005260:Female; D006801:Humans; D008046:Lip / Q000503:physiopathology; D008297:Male; D008310:Malocclusion / Q000150:complications* / Q000601:surgery*; D008334:Mandible / Q000601:surgery; D019647:Oral Surgical Procedures; D019340:Osteotomy, Le Fort; D013065:Speech Intelligibility; D014059:Tongue / Q000503:physiopathology; D016896:Treatment Outcome; D014681:Velopharyngeal Insufficiency / Q000209:etiology* / Q000601:surgery; D014832:Voice Disorders / Q000209:etiology* / Q000601:surgery