RESUMO
The objective of the study was to determine the effects of fixed orthodontic appliances on periodontal health. This prospective longitudinal self- controlled study was conducted on 54 adolescents [14 males, 40 females] who were scheduled for fixed orthodontic treatment in January 2013. Dental plaque accumulation, gingival inflammation and periodontal health were assessed. These periodontal indices and plaque indices were determined prior to the placement of fixed appliances and two weeks after the beginning of orthodontic treatment. All clinical values started to increase after the placement of fixed appliances. Treatment with fixed appliances in adolescents may transitionally increase the values of plaque and gingival indices. Oral hygiene measures, patient education and motivation are all very important after placement of fixed and removable appliances