Objective This study aimed to observe the effects of periodontal scaling and root planning prior toorthodontic treatment on the periodontal situation during adult fixed orthodontic. Methods A total of 72 cases of orthodontic adult patients were selected and divided into two groups, namely, observed group and control group. The periodontal status of all the patients was evaluated during the first visit. Oral hygiene education was lectured to every patient. Periodontal scaling and root planning were conducted two weeks before orthodontic treatment in the observed group. After 6 and 12 months, the periodontal status of the patients was evaluated again. The changes in theperiodontal situation were recorded, and statistical analysis was performed. Results No statistical differences were observed in the gingival index(GI), plaque index(PLI), and sulcus bleeding index(SBI) in the observed group 6 months after the orthodontic treatment compared with those before the treatment(P>0.05). GI was 1.63±0.33 after 12 months with no statistical difference(P>0.05). PLI was 1.82±0.40 and SBI was 1.84±0.25 after 12 months. Both variables are higher than those before treatment(P0.05). GI, PLI, and SBI are all higher in the control group compared with the corresponding indices in the observed group 6 months and 12 months after the treatment started(P
