Changes of Teeth Inclination After Orthodontic Treatment of Class II Division 1 Malocclusion

Saad Gasgoos,Nada Al–Sayagh,Neam Al–Saleem

doi:10.33899/rden.2010.45438

Abstract

Aims: The aims of the study are to evaluate the degree of improvement in labiolingual or buccolingual inclination of the teeth after treatment of class II division 1 malocclusion using Roth appliance and to compare the teeth inclination after treatment with that of normal occlusion samples to show if Roth appliance can give a reasonable result with straight arch wire technique. Materials and Methods: A twenty five patients (15–25 years age) with Class II division 1 malocclusion were treated with Roth 22" bracket system after extraction of upper first and lower second premolars to correct molars and canine relation, then the teeth inclination were compared among the four groups on the study casts that were taken before treatment, after treatment, after 1 year retention, and with the control group (25 dental casts of normal Class I occlusion) using special gauge. Results: Significant differences were seen among the four groups in the most of the teeth with the exception of the first molars and upper first premolars with the highest possible value in the(before treatment group). Conclusions: A considerable dispersion around the mean torque measurements was seen in the four groups , more lingual inclination was noticed in distally situated teeth. The preadjusted brackets help in decreasing the labial inclination of the treated teeth in Class II malocclusion making their inclination nearly to control group

Highlights

Fixed appliance therapy is one of the most widely used treatment modalities in orthodontic therapy appropriate placement of bracket followed by engagement with rectangular arch wire, confers adequate torque, tip to the tooth
MATERIALS AND METHODS The sample of this study was consisted of 25 dental casts for individuals aged 15–25 years old with normal occlusion as controlled group, 25 casts for patients aged 15–25 years old with class II division 1 malocclusion, 25 casts for the same patients after completion of orthodontic treatment and 25 casts for the treated patients after 1 year retention
In lower arch the mean torque value was positive in the right and left central and lateral incisors while the rest of the teeth showed a negative value

Summary

Introduction

Fixed appliance therapy is one of the most widely used treatment modalities in orthodontic therapy appropriate placement of bracket followed by engagement with rectangular arch wire, confers adequate torque, tip to the tooth. This allows correct inclination and angulations so that the finished treatment meets Andrews six keys to normal occlusion[1,2]. Orthodontic treatment objectives can be stated as obtaining functional occlusion, esthetic and stability. One of the criteria for obtaining a functional occlusion is to have an ideal axial inclination of all teeth at the end of active treatment[3]. Preadjusted or straight wires appliances are designed to reduce or elimiwww.rafidaindentj.net

Methods

Discussion

Conclusion