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Article
Interrelation between Cranial Base and Facial Heights of Two Age Groups (Cross–sectional Study Using Digital Cephalometric Radiograph)

Author: Younis MS Hasan
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2011 Volume: 11 Issue: 2 Pages: 219-230
Publisher: Mosul University جامعة الموصل

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Abstract

Aims: The aim of this study is to detect the interrelation between the cranial base and the facial heights involving age and sex differences. Materials and Methods: The study was carried out on cephalo-metric of 63 subjects divided into two age groups: The first group including 36 subjects of 10–15 years and the second group including 27 subjects of 16–25 years, both groups of normal Cl.I molar occlusion with full set of permanent teeth. Lateral cephalometric radiograph were selected from computer of digi-tal radiography system (Planmeca dimaxis version 3). Nine linear measurements three for cranial base and six for facial heights with one ratio posterior to anterior facial height were evaluated. Results: There were a significant increase in means of group 2 for each cranial base and facial heights meas-urements, also within each age group means for male samples showed a significant increase in compar-ison with those of females. Posterior to anterior facial heights ratios were involved in normal range for both age groups. In addition a significant positive correlation were found between most of cranial base measurements with those of facial heights. Conclusions: Positive interrelation may be existed between growth of cranial base and growth of facial heights structures.

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Article
Validation of Tanaka and Johnston Method on Iraqi Population

Authors: Younis MS Hasan --- Khawla M Awni --- Hind T Jarjees
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2009 Volume: 9 Issue: 1 Pages: 17-23
Publisher: Mosul University جامعة الموصل

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Abstract

Aims: To validate Tanaka and Johnston's analysis on (50) Iraqi patients (29 females and 21 males)
aged 14–22 years. The patients had normal class I molar relation ship with full permanent dentition.
Materials and Methods: Plaster models of 50 (14–22) years old patients were selected. Mesio–distal
crown diameter for maxillary and mandibular permanent teeth were measured. Statistical descriptive,
probability theory, correlation coefficients between individual and grouped teeth were calculated using
Tanaka and Johnston method. Results: Tanaka and Johnston's analysis tables, equations and approximations
were modified in order to improve the accuracy of the prediction. The correlation coefficients
found between the size of the permanent mandibular central incisors and maxillary first molars (1, 1, 6
and 6) and maxillary and mandibular canines and premolars were high (r = 0.62 and r = 0.67, respectively).
New, more accurate prediction tables applicable at earlier ages, and new regression equations
were constructed. In addition, new easier approximations were developed to allow the prediction of the
size of the unerupted maxillary canines and premolars by adding 5.6 mm to the half–widths of teeth 1,
1, 6 and 6. The analogous prediction of the size of unerupted mandibular canines and premolars was
obtained by adding 5.4 mm to the half widths of same teeth 1 ,1 , 6 and 6. Conclusions: The new analysis
prediction tables and new regression equations based on teeth 1 ,1, 6 and 6, which erupt earlier
than teeth used by Tanaka and Johnston, proved even more accurate than both previous equations.

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Article
Assessment of KÖle analysis (Yuinzing modification) in Mosul city (a cephalometric study)

Authors: Younis MS Hasan --- Ahmad A Abdulmawjood --- Khidhair A Al–Jumaili
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2011 Volume: 11 Issue: 3 Pages: 199-206
Publisher: Mosul University جامعة الموصل

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Abstract

Aims: The aim of this study is to assess Köle analysis (Tuinzing modification) for determining the possible positions of chin (soft and hard tissue) in skeletal Cl.I, Cl.II and Cl. III type of malocclusion of adult age group and for both genders. Materials and Methods: The study was carried out on the lateral cephalometric radiograph of (118) subjects of adult age group (18-25) years old; Cl I type (28 male and 19 female), Cl II type (19 male and 17 female) and Cl III type (18 male and female 17). SNA, SNB and ANB were used to estimate the type of skeletal malocclusion. For the analysis, 2 lines perpendicular to SN line are drawn touching the most anterior point of the upper lip-Ls (upper lip plane) and one from the infra orbital point-Or (orbital plane). The position of the chin points (hard and soft tissue) were assessed via determining the position of (Pog and Pg) respectively in relation to these two vertical planes using five scores: Score 1: give to the chin point that situated posterior to orbital plane. Score 2: give to the chin point that situated in a touch with orbital plane. Score 3: give to the chin point that situated in between orbital plane and upper lip plane. Score 4: give to the chin point that situated in a touch with upper lip plane. Score 5: give to the chin point that situated anterior to the upper lip plane. Results: The positions of Pog and Pg: Cl I mainly at score (2 and 3) respectively, Cl II mainly at score (1and 2) respectively and Cl III type Pog gave rise to slight increase of score (3 than 2) while Pg gave rise to slight increase of score (3 than 5) with no significant difference between genders for all classes. Conclusions: Köle analysis (Tuinzing modification) may be valuable for determining chin (soft and hard tissues) of Cl I, Cl II and Cl III types of malocclusion of adult age group and for both genders

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