Efficiency of Mandibular Arch Alignment with Self-Ligating and Conventional Edgewise Appliances: A Dental Cast Study
- *Corresponding Author:
- Marcio Rodrigues de Almeida
Orthodontic Department, University of North Parana
Av. Jose Vicente Aiello 7-70
Bauru-São Paulo, Brazil, 17053-093
E-mail: [email protected]
Received date: December 27, 2011; Accepted date: April 24, 2012; Published date: April 25, 2012
Citation: Gaspar Ribeiro DA, deAlmeida MR, Conti AC, Navarro R, Oltramari- Navarro P, et al. (2012) Efficiency of Mandibular Arch Alignment with Self-Ligating and Conventional Edgewise Appliances: A Dental Cast Study. Dentistry 2:128. doi: 10.4172/2161-1122.1000128
Copyright: © 2012 Gaspar Ribeiro DA, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Objective: To analyze and compare the efficiency of the correction of mandibular crowding between two types of bracket systems.
Material and method: According to the results of the power analysis for sample size calculation, 19 Angle Class I patients were included in the study and randomly divided into two groups: GI (n=10, mean age 19.68years, min 13.86, max 28.78, self-ligating brackets), and GII (n= 9, mean age 20.98years, min11.13, max 29.85, conventional preadjusted brackets). To carry out this study, the sequence of wires used was similar for both groups. Dental casts were made available at the start of the treatment (T1), after 180 days of leveling and alignment(T2), and at the completion of leveling (mean, 600 days, T3). The degree of crowding was measured by means of Little’s and Fleming’s irregularity indexes, by using a Mitutoyo digital caliper. Student’s t test and ANOVA were used to compare the efficiency of mandibular alignment between the two groups.
Results: The results showed that in the initial alignment phase (after 180 days), no statistically significant difference was found between the groups. On the other hand, from phase T1 to T3, it was observed a statistically significant difference between the groups regarding the correction of mandibular crowding.