title: A retrospective analysis of dentofacial deformities and orthognathic surgeries using the index of orthognathic functional treatment need (IOFTN).
abstract: OBJECTIVE
  To assess the functional needs of orthognathic cases treated in Northampton General Hospital using the index of orthognathic functional treatment need (IOFTN).
  
  
  METHODS
  A retrospective study was conducted on 78 subjects (54 female and 24 males, 10-54 years, mean (SD) age=21.88 (6.98) years) who had orthognatic surgery in Northampton General Hospital or were in preparation for it (5 case). The sample represents a period between February 1997 and December 2014. The components of IOFTN and Dental Health Component (DHC) of the Index of Orthodontic Treatment Need (IOTN) as well as Malocclusion type were recorded.
  
  
  RESULTS
  Class III malocclusion/skeletal pattern was the most prevalent type (approximately 49%). There were 1, 36, 3, and 38 subjects with Class I, Class II Division I, Class II Division II, and Class III malocclusions, respectively. In terms of sagittal skeletal relationship, there were 2, 37, and 39 subjects with Class I, Class II, and Class III skeletal bases, respectively. The most prevalent IOFTN score in our sample was the 5.2 (29.5%), followed by 5.3 (15.5%), 4.2 (13%), 4.3 (11.5%). Overall, 92.3% were classified as in great and very great functional needs according to the IOFTN. Similarly, 84.6% scored as grade 4 or 5, according to the IOTN (DHC). The bimaxillary type osteotomy was the most prevalent type (61.5%).
  
  
  CONCLUSIONS
  Using IOFTN, 92.3% of our sample were classified as having great and very great functional needs. IOFTN is a simple and reliable tool to identify patients in need of orthognathic surgery and can be used in resource allocation for patients with highest functional needs.
authors.affiliation: Maxillofacial Unit and Orthodontics, Northampton General Hospital, Clifontville, Northampton, United Kingdom.
authors.forename: Claire
authors.initials: C
authors.lastname: Harrington
authors.affiliation: Maxillofacial Unit and Orthodontics, Northampton General Hospital, Clifontville, Northampton, United Kingdom.
authors.forename: James R
authors.initials: JR
authors.lastname: Gallagher
authors.affiliation: Maxillofacial Unit and Orthodontics, Northampton General Hospital, Clifontville, Northampton, United Kingdom; Warwick Dentistry, Warwick Medical School, University of Warwick, Coventry, United Kingdom. Electronic address: farahani@faraortho.com.
authors.forename: Ali
authors.initials: A
authors.lastname: Borzabadi-Farahani
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D000066491:Clinical Decision-Making / Q000379:methods*; D003661:Decision Support Techniques; D063169:Dentofacial Deformities / Q000175:diagnosis / Q000601:surgery*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D056948:Orthognathic Surgical Procedures; D012189:Retrospective Studies; D012720:Severity of Illness Index; D016896:Treatment Outcome; D055815:Young Adult
keywords: Dentofacial deformity; Facial skeletal disharmony; IOFTN; IOTN; Masticatory dysfunction; Orthognathic surgery