Abstract:

Objective  To evaluate root resorption associated with self-ligating and conventional ligating bracket systems in orthodontic treatment. Methods  Electronic databases such as CNKI, Wan Fang Data, VIP, CBM, the Cochrane Library, Medline, PubMed and EMbase, were searched from the day of they were established to June 30, 2013, in order to collect randomized controlled trials (RCTs) about the root resorption associated with self-ligating versus conventional ligating brackets. The quality of the included studies was evaluated with two reviewers independently, and Meta-analysis was performed by using RevMan 5.2.1 software. Results  Three RCTs including 464 teeth were identified. The Results   of Meta-analysis showed no significant differences between the two groups in maxillary incisors (MD = 0.20, 95%CI -1.45 to 1.05, P=0.75), maxillary lateral incisors (MD=0.53, 95%CI -0.50, 1.56, P=0.31), mandibular incisors (MD=-0.01, 95%CI  -0.22, 0.20, P=0.92) and mandibular lateral incisors (MD=-0.31, 95%CI -1.33, 0.71, P=0.55). Conclusion  As the type of orthodontic appliance may not be the major factor influencing root absorption, and suitable brackets can be chosen by orthodontic dentists according to the merits and demerits of self-ligating and traditional ligating brackets and deformity of patients’ teeth.

Key words: Root resorption, Self-ligating brackets, Orthodontic treatment, Conventional ligating brackets, Systematic review