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Functional needs in orthognathic patients with different sagittal skeletal discrepancies
Ali Borzabadi-Farahani1, Hatice Kübra Olkun2, Ladan Eslamian3
1School of Dentistry, College of Biomedical and Life Sciences, Cardiff University, Cardiff, UK; Crouch End Orthodontics, London, UK.
Summary
The Index of Orthognathic Functional Treatment Need (IOFTN) and ANB angle show a weak correlation in orthognathic patients. This suggests limited clinical significance for predicting functional treatment needs based on sagittal skeletal discrepancy alone.
Area of Science:
- Orthodontics
- Oral and Maxillofacial Surgery
- Dental Research
Background:
- Orthognathic surgery corrects significant skeletal discrepancies.
- Assessing treatment need involves evaluating functional and esthetic factors.
- The Index of Orthognathic Functional Treatment Need (IOFTN) quantifies functional treatment requirements.
Purpose of the Study:
- To investigate the correlation between the IOFTN and the ANB angle in orthognathic patients.
- To determine if sagittal skeletal discrepancy predicts functional treatment need.
Main Methods:
- Retrospective analysis of 403 orthognathic patient records.
- Documentation of malocclusion type, ANB angle, and IOFTN scores.
- Statistical analysis using Spearman correlation and regression.
Main Results:
- A weak negative correlation (r = -0.297, P < .001) was found between IOFTN and ANB angle.
- Regression analysis indicated that ANB angle accounted for only 6.9% of the variance in IOFTN scores.
- Correlation remained weak across different malocclusion classes.
Conclusions:
- The relationship between sagittal skeletal discrepancy (ANB angle) and IOFTN score is weak.
- The ANB angle has limited clinical significance in predicting the functional treatment need for orthognathic patients.
- Further research may be needed to identify more robust predictors of functional treatment need.
