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Background and objectives. Contemporary orthodontics extends beyond functional correction to include dentogingival and smile aesthetics. While indices such as the Dental Aesthetic Index (DAI) and Bolton analysis quantify malocclusion severity and tooth-size discrepancies, standardized evaluation of post-treatment dentogingival aesthetics remains limited. This study aimed to assess dentogingival aesthetic outcomes following fixed orthodontic treatment using the combined Pink Esthetic Score and White Esthetic Score (PES+WES), alongside baseline evaluation of orthodontic treatment need and interarch proportionality. Materials and methods. A prospective observational study was conducted on 48 patients undergoing comprehensive fixed orthodontic treatment. Malocclusion severity was assessed at baseline using the DAI, and anterior and overall Bolton ratios were calculated on study casts. Post-treatment dentogingival aesthetics were evaluated using PES+WES on standardized frontal smile photographs by two calibrated orthodontists. Results. At baseline, 79% of patients exhibited moderate to very severe orthodontic treatment need. Bolton discrepancies were identified in 45.8% of cases. Post-treatment mean scores were 8.6 ± 1.1 for PES, 8.2 ± 1.3 for WES, and 16.8 ± 2.1 for combined PES+WES. Very good to excellent aesthetic outcomes were achieved in 87% of patients, with no unsatisfactory results recorded. Conclusions. Fixed orthodontic treatment can achieve favorable dentogingival aesthetic integration without adjunctive restorative or periodontal procedures. The PES+WES index represents a reliable and clinically applicable tool for comprehensive aesthetic outcome assessment in orthodontics.