Document Detail

Effects of bimaxillary surgery and mandibular setback surgery on pharyngeal airway measurements in patients with Class III skeletal deformities.
MedLine Citation:
PMID:  17346593     Owner:  NLM     Status:  MEDLINE    
INTRODUCTION: The purpose of this study was to compare the short-term and long-term effects of bimaxillary surgery with those of mandibular setback surgery concerning pharyngeal airway measurements at 3 levels: nasopharynx, oropharynx, and hypopharynx. METHODS: The sample included 66 Japanese women in 2 groups who had been diagnosed with Class III skeletal deformities and had undergone surgical-orthodontic treatment. Those in group A (35 patients) underwent bilateral sagittal split ramus osteotomies; those in group B (31 patients) underwent LeFort I procedures with bilateral sagittal split ramus osteotomies. Lateral cephalograms were assessed within 6 months before surgery and at short-term (3-6 months after surgery) and long-term (at least 2 years after surgery) follow-ups. RESULTS: In group A, the pharyngeal airway was constricted significantly at the oropharyngeal and hypopharyngeal levels at both the short-term and the long-term follow-ups. In group B, significant changes were shown at the 3 pharyngeal levels at the short-term follow-up, whereas no significant changes were shown at the long-term follow-up. CONCLUSIONS: These results indicate that, when possible, bimaxillary surgery rather than only mandibular setback surgery is preferable to correct a Class III deformity to prevent narrowing of the pharyngeal airway space, a possible predisposing factor in the development of obstructive sleep apnea.
Fengshan Chen; Kazuto Terada; Yongmei Hua; Isao Saito
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics     Volume:  131     ISSN:  1097-6752     ISO Abbreviation:  Am J Orthod Dentofacial Orthop     Publication Date:  2007 Mar 
Date Detail:
Created Date:  2007-03-09     Completed Date:  2007-03-26     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8610224     Medline TA:  Am J Orthod Dentofacial Orthop     Country:  United States    
Other Details:
Languages:  eng     Pagination:  372-7     Citation Subset:  D; IM    
Department of Orthodontics, Dental School, Tongji University, Shanghai, China.
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MeSH Terms
Follow-Up Studies
Image Processing, Computer-Assisted
Malocclusion, Angle Class III / radiography,  surgery*
Mandible / radiography,  surgery*
Maxilla / radiography,  surgery*
Osteotomy, Le Fort / adverse effects,  methods*
Pharynx / anatomy & histology*,  radiography
Random Allocation
Sleep Apnea, Obstructive / etiology,  prevention & control*
Time Factors

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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