To evaluate the self-perceived orthodontic treatment need in a university population evaluated through 3 scales that used different approaches.
Design
Cross-sectional survey.
Setting
University dental clinic, Lima, Peru, 2001.
Materials and methods
Questionnaires that gathered perceptions on dentofacial aesthetic perception and orthodontic treatment need were applied to a randomly selected sample (329) of first year university students (729). Subjects undergoing orthodontic treatment at the time of examination were excluded.
Main outcome measures
Aesthetic component (AC) of the Index of Orthodontic Treatment Need (IOTN), Oral Aesthetics Subjective Index Scale (OASIS) and a visual analogue scale (VAS) were used.
Statistical analysis
Descriptive statistics, Spearman correlation test, Kruskall–Wallis test and Mann–Whitney U-test were used.
Results
For the AC, 87.5% were in the ‘without treatment need’ category, 10.6% in the ‘borderline need’ category and 1.8% in the ‘treatment need’ category. The mean AC score was 3.02 (±1.49). The mean OASIS score was 11.81 (±4.84), and the VAS score was 40.16 (±18.16). Correlations between the 3 self-assessment scales were moderate (AC-OASIS 0.416, AC-VAS 0.541 and OASIS-VAS 0.457). Gender or previous orthodontic treatment had no influence (p<0.05) on the scales.
Conclusions
Differences in the approaches used by each scale to evaluate the self-perception of the aesthetical arrangement of the front teeth may explain the moderate correlation values.
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