Invisible orthodontic correction without bracket for anterior tooth space caused by periodontal disease

Objective To explore the clinical efficacy of invisible orthodontic correction without bracket for anterior tooth space caused by periodontal disease.Methods 80 patients with anterior tooth space caused by periodontal disease were selected from our hospital from January,2012 to June,2013 and then were divided into a treatment group and a control group according to different treatments,40 cases for each group.The treatment group were treated with invisible orthodontic correction without bracket,while the control group with routine fixed orthodontic correction.The clinical efficacies,probing depths,plaque indexes,times for closing front tooth gap,and the changes of other parameters in the two groups were compared.Results After the treatment,the anterior tooth gap,tooth looseness,1-NA distance,and 1-NA angle were significantly improved in both groups,but the clinical indicators of the treatment group were significantly better than that of the control group (P ＜ 0.05); the probing depth was significantly improved in both groups,but the lifting amplitude of the probing depth were significantly higher in the treatment group ([1.69 ± 0.26] mm) than in the control group ([1.56-± 0.18] mm) (P ＜ 0.05) ; the plaque index (9.8％),time for closing front tooth gap ([2.0 ± 0.9] months),and appliance looseness (0) were significantly better in the treatment group than in the control group (P ＜ 0.05).Conclusions Invisible orthodontic correction without bracket for anterior tooth space caused by periodontal disease doesn' t injury periodontal tissue in short term and is effective,suitable for the mild to moderate patients,and is worth being clinically generalized. Key words: Clinical efficacy;  Invisible orthodontic correction without bracket;  Periodontal disease; Anterior tooth space