Comparison of Different Sagittal Dysplasia Indicators in a Sample from Syrian Population

Sleiman Hassan Ahmad

doi:10.11648/j.ijbse.20160402.11

Abstract

In orthodontic diagnosis, an accurate evaluation of sagittal jaw relationship is critically important. There are numerous angular and linear measurement could be used to evaluating the antero-posterior jaw discrepancy between maxilla and mandible so as to reach the correct diagnosis such. The usual practice is to compare the cephalometric analysis of the patient with the established normal values. Since craniofacial morphology varies among different populations therefore it becomes important to establish the cephalometric norms of all cephalometric analyses, for every population. The aims of this study were to evaluate the validity of ANB Angle, BETA Angle, W Angle and YEN Angle in Syrian sample. Materials and methods: 60 lateral cephalometric radiographs of Syrian population (35 boys and 25 girls), were traced for ANB, Wits appraisal, Beta angle, W angle and YEN angle. Patients were divided into skeletal Class I, II and III groups. Result: No statistically significant difference was found in all measurements values. ANB, BETA, W and YEN angle not differed significantly from the stander measurements in all three groups (p<0.05). The mean value for: the ANB angle for the Syrian population was3.4 degrees with SD of 0.6, and for the Beta angle was30degrees with SD of 4.2, and for the W angle was 53.7degrees with SD of 1.6. YEN angle mean value for the Syrian population was 120 degrees with SD of 1.5. These results suggest that all the performed analyses are valid and can be used to diagnose skeletal discrepancies and diagnosis based on single analysis is insufficient.

Highlights

Cephalometric analysis is an integral part of diagnosis as well as treatment planning in contemporary orthodontics.It is practiced by comparing patient’s radiographic measurements with norms or standard values, most of which are obtained from the researches that involved sample from American or European populations [1]. it is not justified to apply these standard values in other populations because of possible ethnic and racial variations
This study evaluate and compare some important angular measurement that could be used to evaluating the sagittal jaws relationship relation such as ANB angle, Wits appraisal, Beta angle, YEN angle and W-angle in Syrian Population
In this study ANB angle, beta angle, W angle and YEN angle in Syrian sample for all three classes cases showed no significant difference as compared to original value of these measurements. (p≤0.001)

Summary

Introduction

Cephalometric analysis is an integral part of diagnosis as well as treatment planning in contemporary orthodontics.It is practiced by comparing patient’s radiographic measurements with norms or standard values, most of which are obtained from the researches that involved sample from American or European populations [1]. it is not justified to apply these standard values in other populations because of possible ethnic and racial variations. Cephalometric analysis is an integral part of diagnosis as well as treatment planning in contemporary orthodontics. It is practiced by comparing patient’s radiographic measurements with norms or standard values, most of which are obtained from the researches that involved sample from American or European populations [1]. It is not justified to apply these standard values in other populations because of possible ethnic and racial variations. Many investigators have found marked difference in the cranio facial morphology in various ethnicities which reflects in cephalometric measurements too [2,3]. In a study that involved Chinese and British white children, significant difference was found in sagittal (anteroposterior) and vertical cephalometric measurements [4].

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