To retrospectively assess malocclusions, skeletal relationships and the functional needs of orthognathic patients treated in a University teaching hospital.
Subjects and methods:
This study used clinical records of 100 consecutive patients [51 female, 49 males, mean (SD) age =21.5 (2.71) years] who had orthognathic surgery
in a Shahid Beheshti University of Medical Sciences affiliated hospital (9/2014–7/2017). Malocclusion type (incisor classification), sagittal skeletal pattern (ANB angle), index of orthognathic functional treatment need (IOFTN
) score, and osteotomy type were recorded.
Overall, 66%, 31%, and 3% had Class III, II, and Class I malocclusions, respectively. Similarly, 68% and 32% had Class III and II sagittal skeletal relationships, respectively. Overall, 95% of patients scored IOFTN
4 or 5. The most prevalent IOFTN
score were 4.3 (37%), 5.3 (16%), 5.4 (16%), and 4.2 (10%). There were no gender differences (P
>0.05) for the distribution of malocclusions, sagittal skeletal relationships, different IOFTN
scores, or when IOFTN
scores were re-grouped (5, 4, and ≤3). When IOFTN
scores were re-grouped (5, 4, and ≤3), they were equally distributed among patients with Class II or III skeletal relationships (P
>0.05), but when the authors looked at different malocclusions, there were significant differences in IOFTN
score distribution (P
= 0.006). The use of genioplasty (4%) or distraction osteogenesis (2%) was limited. Single jaw surgery of either maxilla or mandible was used in 15% and 22% of patients, respectively. About 63% had undergone double-jaw surgery.
Retrospective assessment using IOFTN
identified 95% of patients as having great and very great functional needs, but prospective studies using IOFTN
is needed to assess the need for orthognathic surgery
. Class III malocclusions and Class III sagittal skeletal relationships were more common in this sample.