title: Treatment duration and factors associated with the surgery-first approach: a two-center study.
abstract: BACKGROUND
  The aim of this study was to evaluate treatment duration and number of appointments in orthognathic surgery using the surgery-first approach (SFA) and to evaluate the factors associated to these outcomes.
  
  
  METHODS
  This was a retrospective chart review of consecutively treated patients with SFA at a University clinic and a private practice setting. Treatment duration, number of appointment, and factors associated to this duration such as patient demographics, type of surgery, use of 3D planning, and treatment center among others were evaluated. Multivariable linear regression models were used to examine the simultaneous association between all predictor variables and outcomes.
  
  
  RESULTS
  Median treatment duration for patients undergoing SFA was 9.6 months [6.1 (25 % percentile); 13.4 (75 % percentile)] with a median number of 13.8 appointments [9 (25 % percentile); 17 (75 % percentile)]. Transverse maxillary expansion was associated with longer treatment duration and number of appointments. There was also a significant difference in number of appointments between the two treatment centers.
  
  
  CONCLUSIONS
  SFA significantly reduces treatment duration in orthognathic surgery. Transverse expansion is associated with longer treatment duration and number of appointments.
authors.affiliation: Division of Orthodontics, Department of Craniofacial Sciences, University of Connecticut School of Dental Medicine, 263 Farmington Avenue, Farmington, CT, 06030, USA. Furibe@uchc.edu.
authors.forename: Flavio
authors.initials: F
authors.lastname: Uribe
authors.affiliation: Division of Orthodontics, Department of Craniofacial Sciences, University of Connecticut School of Dental Medicine, 263 Farmington Avenue, Farmington, CT, 06030, USA.|Division of Orthodontics, University of California at San Francisco, San Francisco, CA, 94143, USA.
authors.forename: Sara
authors.initials: S
authors.lastname: Adabi
authors.affiliation: Division of Orthodontics, Department of Craniofacial Sciences, University of Connecticut School of Dental Medicine, 263 Farmington Avenue, Farmington, CT, 06030, USA.
authors.forename: Nandakumar
authors.initials: N
authors.lastname: Janakiraman
authors.affiliation: Department of Orthodontics, College of Dentistry, The University of Iowa, Iowa City, IA, USA.
authors.forename: Veerasathpurush
authors.initials: V
authors.lastname: Allareddy
authors.affiliation: Department of Pediatrics, Dental Services, Oral Maxillofacial and Craniofacial Surgery, Yale School of Medicine, New Haven, CT, USA.
authors.forename: Derek
authors.initials: D
authors.lastname: Steinbacher
authors.affiliation: Division of Oral and Maxillofacial Surgery, Department of Craniofacial Sciences, University of Connecticut School of Dental Medicine, Farmington, CT, USA.
authors.forename: David
authors.initials: D
authors.lastname: Shafer
authors.affiliation: Department of Orthodontics and Maxillofacial Surgery, CES University and Private Practice Medellin, Medellin, Colombia.
authors.forename: Carlos
authors.initials: C
authors.lastname: Villegas
mesh_terms: D001071:Appointments and Schedules; D015331:Cohort Studies; D017076:Computer-Aided Design; D005146:Facial Asymmetry / Q000601:surgery / Q000628:therapy; D005260:Female; D005500:Follow-Up Studies; D005544:Forecasting; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods; D008297:Male; D008313:Malocclusion, Angle Class III / Q000601:surgery / Q000628:therapy; D009971:Orthodontics, Corrective / Q000379:methods; D056948:Orthognathic Surgical Procedures / Q000379:methods*; D010155:Palatal Expansion Technique; D010347:Patient Care Planning; D012189:Retrospective Studies; D013997:Time Factors; D016896:Treatment Outcome; D014584:User-Computer Interface; D055815:Young Adult