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Article
RAMUS HEIGHT AND ITS RELATIONSHIP WITH SKELETAL AND DENTAL MEASUREMENTS

Author: Yassir A. Yassir
Journal: Journal of Oral and Dental Research مجلة طب الفم والاسنان ISSN: 23106417 Year: 2013 Volume: 1 Issue: 1 Pages: 1-5
Publisher: Iraqi Association for Oral Research الجمعية العراقية لبحوث طب الفم

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Abstract

Background: The purpose of this study was to assess mandibular ramus height and to assess the relationship of ramus heightwith various craniofacial and dental measurements in a sample of Iraqi adults with skeletal and dental Class I.Materials and method: The sample consisted of 95 Iraqi adults (54 females and 41 males) having normal occlusion andClass I skeletal pattern aged between 18 and 31 years. Each individual was subjected to clinical examination and digital truelateral cephalometric radiography. The radiographs were analyzed using AutoCAD 2007 software computer program to de- termine ten linear and seven angular measurements. Descriptive statistics were obtained and independent samples t-test wasperformed to evaluate the gender differences, while Pearson’s correlation coefficient test was used to identify correlationsbetween ramus height and other measurements.Results: All linear measurements were significantly higher in males, while angular measurements showed non-significantdifferences between males and females, except for SN-MP, SN-PP, and N-S-Ar angles which were significantly higher in fe- males than in males. For both genders, there were significant positive correlations between ramus height and posterior facialheight, maxillary and mandibular molar dentoalveolar heights, while there were significant negative correlations with SN-MP,PP-MP, and Ar-Go-Me angles. Ramus height in females showed a significant positive correlation with N-S-Ar angle, and asignificant negative correlation with S-Ar-Go angle.Conclusions: Ramus height was directly correlated with intermaxillary space in the posterior region, and inversely correlatedwith angles of mandibular rotation.


Article
The differences of the skeletal and dental heights between the two age groups of cl-ass I deep bite. (Cephalometric Study)

Authors: Younis M Saeed --- Ra’ed J Sa’id --- Hind T Jarjees
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2007 Volume: 7 Issue: 9 Pages: 71-79
Publisher: Mosul University جامعة الموصل

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Abstract

Aims: The purpose of this study was to determine the age differences for deep bite malocclusion concerning facial skeletal and dentoalveolar height. Materials and Methods: It was carried out on a sample of (50) students (16 males and 34 females), aged (12–15) years with class I deep bite malocclusion present when the incisal edge of the lower central incisor is at least in contact with the gingival third of the upper central incisor in normal healthy individuals with full set of permanent teeth in both jaws. The sample were divided into two age groups (12–13) and (14–15) years old. Lateral cephalometric radiograph was taken for each subject. Twenty–one cephalometric measurements (nine angular and twelve linear) and five ratios had been determined. The data were statistically analysed using statistical package for social statistics. Results: The results revealed that upper anterior facial height, ramus height, total posterior facial height, lower posterior facial height, upper posterior dental height and lower anterior dental height were significantly increase with age in total sample. Males showed increase of total posterior facial height and lower posterior facial height with age while females showed increase of lower posterior facial height and upper posterior dental height with increasing age. Concerning ratios, total posterior facial height to total anterior facial height ratio was increased significantly with age in males opposite to the lower anterior facial height to total anterior facial height ratio which was decreased significantly with age in males. Upper posterior dental height to upper anterior dental height ratio showed significant increase with age in males, females and total sample. Angular measurements revealed that males, females and total sample showed significant decrease of the angle formed by the intersection between occlusal plane and palatal plane (Occ–pp) with increasing age. Conclusions: Deep bite was affected by age only for posterior skeletal facial dimensions and not for anterior skeletal facial measurements.

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