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Abstract Format Summary Summary (text) Abstract Abstract (text) MEDLINE XML PMID List Apply Send to: Angle Orthod. 2012 Mar 12. [Epub ahead of print] Comparison of root resorption between self-ligating and conventional preadjusted brackets using cone-beam computed tomography.

Leite V, Conti AC, Navarro R, Almeida M, Oltramari-Navarro P, Almeida R. Source

a Graduate MS student, Department of Orthodontics, University of North Paraná, Londrina, Paraná, Brazil.

Abstract

Abstract Objective: To compare the magnitude of external apical root resorption (EARR) of incisors in patients undergoing the initial phase of orthodontic treatment with two sets of brackets. Materials and Methods: According to the results of the power analysis for sample size calculation, 19 Angle Class I patients (anterior crowding: 3 to 5 mm; mean age: 20.6 years) were included in the study and randomly divided into two groups: group I (n ?=? 11, self-ligating brackets) and group II (n ?=? 8, conventional preadjusted brackets). The degree of EARR was detected in 152 upper and lower incisors by using cone-beam computed tomography (CBCT) scans and a three-dimensional program (Dolphin 11.5, Dolphin Imaging & Management Solutions, Chatsworth, Calif) with 25% level of sensitivity. The CBCT scans were obtained before (T1) and 6 months after initiation of treatment (T2). Differences between and within groups were analyzed by nonpaired and paired t-test, respectively, with 5% significance level. Results: Significant differences were found for both groups between T1 and T2. However, no differences in the degree of EARR were detected between the groups studied. Conclusions: Although EARR has occurred in all teeth evaluated, the bracket design (self-ligating or conventional) did not demonstrate any influence on the results observed.

PMID: 22409394 [PubMed – as supplied by publisher] LinkOut – more resources

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