A Comparative Study between Results of Orthodontic Treatment of Standard Edge-wise and Straight Wire in Patients with Class I Malocclusion

Heravi, Farzin and Mohammadi, Sayeh (2008) A Comparative Study between Results of Orthodontic Treatment of Standard Edge-wise and Straight Wire in Patients with Class I Malocclusion. Journal of Mashhad Dental School, 32 (2). pp. 169-178.

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Abstract

Introduction: Different systems are introduced for orthodontic treatments. Two common systems which are used today are standard edgewise and straight wire methods. For comparing treatment outcomes, occlusal indices have greatest validity. Also buccolingual inclination and mesiodistal angulations of teeth may have a great effect on treatment results. In this study we used Peer Assessment Rating Index (PAR) and Andrews' standards for comparing of treatment outcomes of these two systems. The purpose of this study was to compare the changes of PAR index and buccolingual inclination and mesiodistal angulations of teeth during orthodontic treatment of class I patients by means of standard edgewise and straight wire methods. Materials & Methods: In this descriptive analytical study 100 study models (pre-treatment and post treatment) of 50 class I patients were evaluated by PAR index and Andrews' standards. Twenty five class I patients treated with standard edgewise method and twenty five class I patients treated with straight wire method were selected among the patients of a private clinic. Occlusal characteristics and buccolingual inclination and mesiodistal angulations of all teeth were measured on the study models, respectively before and after treatment. Then PAR index and buccolingual inclination and mesiodistal angulations of the teeth were compared between the two groups by means of Student-t and Mann-Whitney tests. The level of significance was set at 95%. Results: There was no significant difference in sex and age between two groups of patients. PAR index did not show a significant difference between the two groups. Comparison of buccoligual inclination and mesiodistal angulations of teeth with Andrews' standards did not show any significant difference between the two groups except for mesiodistal angulations of the upper central incisors and buccolingual inclination of the upper incisors. These parameters were closer to Andrews' standards in straight wire group. Duration of treatment and number of visits were significantly less in straight wire group than standard edgewise. Conclusion: Occlusal characteristics according to PAR index and buccolingual inclination and mesiodistal angulation of teeth (except for mesiodistal angulations of the upper central and buccoligual inclination of the upper incisors) were similar in edgewise standard and straight wire methods. Straight wire treatment goals were accomplished in shorter duration than standard edgewise treatment. Key words: Standard edge-wise, Straight wire, Tooth buccolingual inclination, PAR index.

Item Type: Article
Subjects: WU Dentistry. Oral surgery
Divisions: Journals > Journal of Mashhad Dental School
Depositing User: jmds jmds
Date Deposited: 24 Sep 2017 12:53
Last Modified: 24 Sep 2017 12:53
URI: http://eprints.mums.ac.ir/id/eprint/3108

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