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Article
Assessment of mandibular third molar position by using computed tomography and reconstructed lateral radiograph

Authors: Istabraq M. Mohamed --- Nidhal H. Ghaib نضال حسين غايب
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2017 Volume: 29 Issue: 2 Pages: 104-107
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: Consideration of mandibular third molar is important from orthodontic perspective due to severalfactors such as, lower anterior arch crowding, relapse in lower anterior region, interference with uprighting ofmandibular first and second molars during anchorage preparation and molar distalization. The aims of this studywere to assess of gender differences in the mandibular third molar position and compare and evaluate whetherthere is any differences in the results provided by CT scan and lateral reconstructed radiograph.Materials and Methods: The sample of present study consisted of 39 patients (18 males and 21 females) with agerange 11-15 years. CT images for patients who were attending at Al Suwayra General Hospital/the ComputerizedTomography department. Computed tomographic images were obtained for The distance from Xi point to distalsurface of permanent mandibular second molar was measured in both three dimensional volumetric images andtwo dimensional CT derived lateral image. The statistical analyses included: means, standard deviations. Paired t-testwas used to compare between the two methods and independent t-test was used in verifying the gendersdifference.Results: The results showed that there was high significant method difference between 3D CT and 2D image andgender differences was observed in values of linear measurements of present study, as males showed higher meanvalues than females.Conclusion: There is high accuracy of measurement on CT images, so CT scan is advisable during the diagnosis andtreatment plan of orthodontic cases


Article
Association of the Morphology of the Atlas Vertebra with the Morphology of the Mandible

Authors: Dr. Zina Zuhair Al-Azawi, B.D.S., M.Sc.** د. زينة زهير --- Dr. Hadeel Ali Hussein Al-Hashimi, B.D.S., M.Sc.* د.هديل علي
Journal: MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان ISSN: 18138500 Year: 2008 Volume: 5 Issue: 2 Pages: 194-199
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

Anatomy and growth of the cervical vertebrae attracted attention, since a number of authors proposed developmental association between different variables indicative of cervical vertebral anatomy and dentofacial build. This study aims to verify the morphology of the atlas vertebra and its relationship with the morphology of the mandible. A total of (41) true lateral radiographs (22 females and 19 males) for subjects with an age range of 18-26 years old were selected and subjected to cephalometric analysis.The results show that all the measurements are higher in males than in females except that for the gonial angle and there are a statistically significant differences in mean values of atlas ventral height, ramus length, ramus width and body length among the three groups of atlas a-p length (short, average, long) which increased as the atlas a-p length increased. While among the three groups of atlas dorsal height (low, average, high), there are statistically significant differences in the mean values of gonial angle which decreased as the atlas dorsal arch height increased. It is concluded that there is an association between atlas morphology and mandibular growth.


Article
Association of the Morphology of the Atlas Vertebra with the Morphology of the Mandible

Author: Dr. Hadeel Ali Hussein Al-Hashimi B.D.S., M.Sc* د. هديل علي
Journal: MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان ISSN: 18138500 Year: 2008 Volume: 5 Issue: 3 Pages: 244-249
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

Anatomy and growth of the cervical vertebrae attracted attention, since a number of authors proposed developmental association between different variables indicative of cervical vertebral anatomy and dentofacial build. This study aims to verify the morphology of the atlas vertebra and its relationship with the morphology of the mandible. A total of (41) true lateral radiographs (22 females and 19 males) for subjects with an age range of 18-26 years old were selected and subjected to cephalometric analysis.The results show that all the measurements are higher in males than in females except that for the gonial angle and there are a statistically significant differences in mean values of atlas ventral height, ramus length, ramus width and body length among the three groups of atlas a-p length (short, average, long) which increased as the atlas a-p length increased. While among the three groups of atlas dorsal height (low, average, high), there are statistically significant differences in the mean values of gonial angle which decreased as the atlas dorsal arch height increased. It is concluded that there is an association between atlas morphology and mandibular growth.

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