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Article
The relation between W angle and other methods used to assess the sagittal jaw relationship

Author: Sara M. Al-Mashhadany سارة المشهداني
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2012 Volume: 24 Issue: 2 Pages: 144-149
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: This study aimed to evaluate the mean value for the W angle in Iraqi adults with a Class I, II, and IIIskeletal relations and to verify the existence of sexual dimorphism, also to study the correlation between this anglewith the other methods (ANB, Wits appraisal, BETA angle, YEN angle) used for evaluation of the antero-posterior (AP)jaw relationship.Materials and methods: One hundred and fifty-two cephalometric radiographs of patients between the age of 18and 25 years were selected. They were again subdivided into Classes I, II, and III groups on the basis of Beta angle,Wits appraisal, and ANB angle, traced using AUTO CAD 2007. The W angle was measured between theperpendicular from point M on S–G line and the M–G line. The mean and the standard deviation for the W anglewere calculated. Independent sample t- test, the one-way analysis of variance, LSD and Pearson correlation wereobtained.Results: The results showed that a patient with a W angle between 51 and 56 degrees can be considered to have aClass I skeletal pattern. With an angle less than 51 degrees, patients are considered to have a skeletal Class IIrelationship and with an angle greater than 56 degrees, patients have a skeletal Class III and there is significantdifference in the mean value of W angle among the three skeletal patterns with a no gender difference. The Wangle had a negative significant relation with ANB in all three classes and with WITS appraisal in class III group, while ithad a positive significant relation with BETA and YEN angles in all the three skeletal relations


Article
The characteristics of profile facial types and its relation with mandibular rotation in a sample of Iraqi adults with different skeletal relations

Authors: Sara M. Al-Mashhadany سارة المشهداني --- Nagham M.J. Al- Mothaffar نغم المظفر
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2012 Volume: 24 Issue: special issue 1 Pages: 135-139
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: Facial type plays an important role in the information of an orthodontic treatment plan and prognosisthat is whether an individual has long, short or average face and it is not possible to apply the same norms andtreatment objective to cases with different facial patterns. This study aims to determine the characteristics of Bimler'sfacial types (dolichoprosopic, mesoprosopic, leptoprosopic) and their relationship with mandibular rotation in Iraqiadults with different skeletal relations.Materials and methods: The sample consisted of 230 digital true lateral cephalometric radiographs of age rangebetween 18-30years (104 males and 126 females), the sample was classified according to ANB angle into threeskeletal classes (class I, class II and class III) and each class was classified depended on PP-MP angle into three faces.Thirteen cephalometric measurements (five angular, seven linear and one ratio) were measured for each individualradiograph using AutoCAD program 2006.Results: The mean values of all measurements for males were significantly higher than females, except for the GA,UGA and LGA, The mean values of GA, LGA, AFH and LAFH were high in leptoprosopic face, while their valuesdecreased in dolichoprosopic face and the reversed were found with JR, PFH, RL and MAXL, moreover all thesemeasurements revealed a highly significant difference between the three facial types.Conclusions: The mandibular rotation was not changed in all skeletal classes that belong to the same facial type asit did not affected by the anteroposterior relation within the same profile

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