Abstract
BackgroundThe aim of this study was to compare the external apical root resorption (EARR) in patients receiving fixed orthodontic treatment with self-ligating or conventional brackets.MethodsStudies comparing the EARR between orthodontic patients using self-ligating or conventional brackets were identified through electronic search in databases including CENTRAL, PubMed, EMBASE, China National Knowledge Infrastructure (CNKI) and SIGLE, and manual search in relevant journals and reference lists of the included studies until Apr 2016. The extraction of data and risk of bias evaluation were conducted by two investigators independently. The original outcome underwent statistical pooling by using Review Manager 5.ResultsSeven studies were included in the systematic review, out of which, five studies were statistically pooled in meta-analysis. The value of EARR of maxillary central incisors in the self-ligating bracket group was significantly lower than that in the conventional bracket group (SMD −0.31; 95% CI: −0.60–−0.01). No significant differences in other incisors were observed between self−ligating and conventional brackets.ConclusionsCurrent evidences suggest self-ligating brackets do not outperform conventional brackets in reducing the EARR in maxillary lateral incisors, mandible central incisors and mandible lateral incisors. However, self-ligating brackets appear to have an advantage in protecting maxillary central incisor from EARR, which still needs to be confirmed by more high-quality studies.
Highlights
The aim of this study was to compare the external apical root resorption (EARR) in patients receiving fixed orthodontic treatment with self-ligating or conventional brackets
1 randomized controlled trials (RCTs), 2 clinical trials (CCTs) and two cohort studies were enrolled in the meta-analysis
The meta-analysis results showed that the patients using SL brackets suffered less EARR of maxillary central incisor compared to those using non-SL brackets (SMD −0.31; 95% confidence interval (CI):−0.60–−0.01) (Fig. 2), while no significant difference was detected in maxillary lateral incisors (SMD −0.14; 95% CI:−0.43–0.16) (Fig. 2), mandibular central incisors (SMD 0.20; 95% CI: −0.05–0.45) (Fig. 2) and mandibular lateral incisors (SMD −0.15; 95% CI: −0.45–0.14) (Fig. 2)
Summary
The aim of this study was to compare the external apical root resorption (EARR) in patients receiving fixed orthodontic treatment with self-ligating or conventional brackets. The lengthy treatment poses higher risks of numerous side effects to patients, among which external apical root resorption (EARR) has been frequently reported [1]. The alternations of root length could cause an unfavorable crown-root ratio, which should be cared with caution when patients suffered from alveolar bone loss simultaneously [6]. This issue deserves more attention since an increasing number of adults
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