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Article
The position of mandibular incisors in a sample of Iraqi adults with Class I malocclusion

Author: Samher Ali Al-Shaham سمهر علي الشحام
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2010 Volume: 22 Issue: 4 Pages: 107-110
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: The attempt to make good diagnosis enforce the orthodontists to examine the relationship of themandibular incisors position in patients with malocclusion to provide the practitioners with more diagnostic normsand correlation equation. This study aimed to determine the position of the mandibular incisors in a sample of adults(aged 18-25 years) with Class I malocclusion, to determine the existence of gender differences in mandibular incisorsposition, and to determine the correlation between the mandibular incisors position with some measurements.Materials and method: Lateral cephalometric radiographs were taken for 60 adults subjects (30 males and 30females). The cephalometric radiographs were traced and verified using AutoCAD 2008 program.Results and Conclusions: The results show non-significant gender difference in the position of the mandibular incisors,and very high significant direct correlation between GoGn-NB angle and the ˉ1ˉ-NB. The GoGn-NB angle can beclassified as most important of the guiding angular variables in determining the lower incisors position (ˉ1ˉ -NB).


Article
Comparison of Dental Arch Parameters of Three Degree of Anterior Crowding of Class I Malocclusion

Authors: Hussain A Obaidi --- Ali R Al–Khatib
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2006 Volume: 6 Issue: SpIss Pages: S48-S57
Publisher: Mosul University جامعة الموصل

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Abstract

To assess the relation between the anterior dental crowding in Class I molar occlusion with the dental arch parameters in both dental arches and for both sexes. Materials and Methods: This study presented data from examination of the study casts for a sample of 106 maxillary and 142 mandibular dental arches of pupils of the intermediate school in Mosul City aged 12–15 years of Iraqi origin. The sample was divided into three main groups according to anterior dental crowding degree (0–2.0 mm, 2.1–4 mm and over 4.0 mm). This was done by calculation of dental arch space available (dental arch perimeter) by utilizing the segment arch technique. The six segment technique assessed by using a modified sliding caliper gauge. The mesio–distal crown width of each tooth was measured, to get the space necessary, and the difference between the space available and the space necessary is negative value represent the amount of crowding. The data was analyzed utilizing statistical analyses at p≤0.05 significant level. Results: all the dental arch parameters were insignificantly decreased throughout the three groups accompanied by increase in the degree of anterior dental crowding except the dental arch perimeter which decreased significantly, while intercanine and the canine–molar parameters were insignificantly increased in both dental arches and for both sexes. Conclusion: The inter–canine parameter increase in crowding case whereas the other parameters are decrease.


Article
Measurement of Mesiodistal Axial Angulation of the Teeth in Class I Malocclusion in Adults

Author: Dr. Layth M. K. Nissan B.D.S., M.Sc. د. ليث نسيم
Journal: MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان ISSN: 18138500 Year: 2010 Volume: 7 Issue: 1 Pages: 41-48
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

AbstractThis study aimed to provide a description of the mesiodistal axial angulation of themaxillary and mandibular teeth in cases of class I malocclusion.The values of the mesiodistal axial angulation of the teeth were measured for 20subjects (10 males and 10 females) from orthopantomograph using computer programand comparisons were made between the right and left sides and between males andfemales.The mean values of the mesiodistal axial angulation of the teeth were higher inmales than in females, and higher on the right side in upper and lower arches than onthe left side for males, females and total sample, however; there was no statisticallysignificant difference between the groups. This study provided a good description ofthe mesiodistal axial angulation of the maxillary and mandibular teeth in cases ofclass I malocclusion.

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