title: Weight loss in orthognathic surgery: a clinical study.
abstract: OBJECTIVE
  To analyse weight change, body composition change and Body Mass Index change in patients undergoing orthognathic surgery.
  
  
  METHODS
  A service evaluation was undertaken in orthognathic patients pre-operatively and at 4 weeks post-surgery.
  
  
  METHODS
  Queen Elizabeth Hospital Birmingham outpatient department.
  
  
  METHODS
  Thirty-one patients scheduled for single- or two-jaw orthognathic surgery and rigid internal fixation.
  
  
  METHODS
  Immediately pre-operatively and at 4 weeks post-surgery the following information was gathered: (1) patient height; (2) patient weight (kg); (3) Patient Body Mass Index; and (4) patient body fat percentage.
  
  
  RESULTS
  In the 4-week post-operative period, the average weight loss was -4·96 kg (range: -9·6 to +3·0 kg), with a body fat reduction of -3·07% (range: -5·80% to +2·30%) and an average reduction in Body Mass Index of -1·63 (range: -3·4 to +0·8). There was no statistically significant difference in weight loss (P = 0·1562) or body fat composition change (P = 0·2391) between single- or two-jaw surgery. There was no statistically significant difference in weight loss (P = 0·4858) or body fat composition change (P = 0·5321) between male and female patients.
  
  
  CONCLUSIONS
  Weight loss observed was similar to that reported in studies using inter-maxillary fixation. Closer psychological and dietetic support is needed for patients who have a low normal or underweight Body Mass Index. Better and more bespoke tailored Oral Nutritional Supplementation must be provided for all orthognathic surgery patients to potentially reduce this significant weight loss.
authors.forename: Douglas
authors.initials: D
authors.lastname: Hammond
authors.forename: Rhodri W
authors.initials: RW
authors.lastname: Williams
authors.forename: Kiranjit
authors.initials: K
authors.lastname: Juj
authors.forename: Susan
authors.initials: S
authors.lastname: O'Connell
authors.forename: Grant
authors.initials: G
authors.lastname: Isherwood
authors.forename: Nichola
authors.initials: N
authors.lastname: Hammond
mesh_terms: D000293:Adolescent; D000328:Adult; D001823:Body Composition / Q000502:physiology; D050218:Body Fat Distribution; D001827:Body Height / Q000502:physiology; D015992:Body Mass Index; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D056948:Orthognathic Surgical Procedures / Q000295:instrumentation / Q000379:methods*; D009984:Orthopedic Fixation Devices; D019340:Osteotomy, Le Fort / Q000295:instrumentation / Q000379:methods; D059229:Osteotomy, Sagittal Split Ramus / Q000295:instrumentation / Q000379:methods; D011446:Prospective Studies; D015431:Weight Loss / Q000502:physiology*; D055815:Young Adult
keywords: Orthognathic surgery weight loss