Background: The present study was conducted to assess effect on orthodontic treatment on gingival tissues. Materials & Methods: 116 patients who underwent orthodontic treatment was recruited. The periodontal status, including visible plaque, visible inflammation, gingival biotype, gingival recession was evaluated. Results: The mean visible plaque score before treatment was 2.5 and after treatment was 5.3, visible inflammation before and after treatment was 2.6 and 16.2 respectively and gingival recession was 0.14 and 0.56 before and after treatment respectively. Gingival biotype was thin in 35.2% before and 34.6% after treatment and thick in 64.8% and 65.4% before and after treatment respectively. The difference was non- significant (P> 0.05). Conclusion: There was increase in gingival recession, visible plaque and visible inflammation after orthodontic treatment.