Document Detail

Relationship of body mass index to stability of mandibular advancement surgery with rigid fixation.
MedLine Citation:
PMID:  19651346     Owner:  NLM     Status:  MEDLINE    
INTRODUCTION: Obesity is a growing problem in the United States. We examined patients undergoing orthognathic surgical correction for Class II skeletal malocclusions and assessed outcomes in relation to body mass index. METHODS: The patients (n = 78) were divided into 3 groups (obese, overweight, and normal or thin) based on body mass index score. They were treated with mandibular advancement (mean, 4.9 mm) with rigid fixation and evaluated cephalometrically for postsurgical changes over a 2-year period; a subset of 54 patients was followed for 5 years. RESULTS: Obese and overweight patients experienced relative postsurgical forward movements at B-point (means, 2.6 and 1.0 mm, respectively), whereas the normal or thin patients had relapses (mean, -0.7 mm) over the 2 years. This trend held up at 5 years, with the obese patients experiencing 3 mm of forward movement compared with the normal or thin patients. Potential reasons for this difference in postsurgical response are orthopedic effects of tongue posture and hormonal and biochemical differences caused by obesity. CONCLUSIONS: Obese and overweight patients have different responses to mandibular advancement with rigid fixation compared with normal or thin patients. These data should enable orthodontists and surgeons to more appropriately treat obese patients.
Wendell W Neeley; Calogero Dolce; John P Hatch; Joseph E Van Sickels; John D Rugh
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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:  136     ISSN:  1097-6752     ISO Abbreviation:  Am J Orthod Dentofacial Orthop     Publication Date:  2009 Aug 
Date Detail:
Created Date:  2009-08-04     Completed Date:  2009-08-17     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8610224     Medline TA:  Am J Orthod Dentofacial Orthop     Country:  United States    
Other Details:
Languages:  eng     Pagination:  175-84     Citation Subset:  D; IM    
Department of Orthodontics, School of Dentistry, University of Texas Health Science Center, San Antonio, Tex 78229, USA.
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MeSH Terms
Body Mass Index*
Cephalometry / statistics & numerical data
Face / anatomy & histology
Jaw Fixation Techniques*
Linear Models
Malocclusion, Angle Class II / surgery*
Mandible / surgery
Mandibular Advancement*
Obesity / physiopathology*
Overweight / physiopathology
Postoperative Period
Retrospective Studies
Treatment Outcome
United States

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

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