Effect of bilateral sagittal split ramus osteotomy setback on the soft palate and pharyngeal airway space
Autor: | Toshitaka Muto, Shigehiro Takeda, Y. Sato, Atsue Yamazaki |
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Rok vydání: | 2006 |
Předmět: |
Adult
Adolescent Cephalometry medicine.medical_treatment Oral Surgical Procedures Mandible Osteotomy Sagittal Split Ramus Osteotomy medicine Humans Reduction (orthopedic surgery) Mandibular hyperplasia Soft palate business.industry Pharynx Anatomy medicine.anatomical_structure Malocclusion Angle Class III Otorhinolaryngology Prognathism Regression Analysis Surgery Female Oral Surgery Palate Soft business Airway |
Zdroj: | International journal of oral and maxillofacial surgery. 37(5) |
ISSN: | 0901-5027 |
Popis: | To evaluate the effect of bilateral sagittal split ramus osteotomy setback on the morphology of the pharyngeal airway, especially the structures of the soft palate and pharyngeal airway space (PAS), lateral cephalograms obtained from 49 women before treatment and 1 year after surgery were traced and compared. All patients underwent this osteotomy to correct mandibular hyperplasia. The data were corrected with the use of regression equations for the PAS, taking into account head posture. On average, the SNB angle decreased by 3.9 degrees, resulting in an increase of 4.1 degrees in OPT/NSL (head posture, defined as the craniocervical angulation at the uppermost part of the cervical spine). The morphology of the PAS and soft palate changed significantly (p < 0.01). The mean reduction in the PAS was 2.6 mm retropalatinally and 4.0 mm retrolingually. On average, the soft-palate length increased by 3.2 mm and the soft-palate angle increased by 4 degrees. These results show that mandibular setback surgery markedly decreases the PAS and changes the morphology of the soft palate. |
Databáze: | OpenAIRE |
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