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Article
MICROSPECTROPHOTOMETRIC QUANTIFICATION OF THE SKELETAL MUSCLE GLYCOGEN CONTENTS WITH AGING

Author: Huda R Kareem هدى رشيد كريم
Journal: IRAQI JOURNAL OF MEDICAL SCIENCES المجلة العراقية للعلوم الطبية ISSN: P16816579,E22244719 Year: 2012 Volume: 10 Issue: 1 Pages: 27-35
Publisher: Al-Nahrain University جامعة النهرين

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Abstract

BackgroundSkeletal muscle fibers contain about 2% of its weight is glycogen, this glycogen used to keep the muscle functioning if it fails to receive sufficient oxygen. PAS stain is useful in detecting cytoplasmic accumulation of glycogen. Glycogen had been studied in skeletal muscles under various state of muscle activities and nutritional states but glycogen quantification with aging is not clearly defined till now.ObjectivesQuantification of the mean glycogen concentration in skeletal muscles fibers stained with PAS stain in various age groups by microspectrophotometry.MethodsThe tibialis anterior muscle of 20 Albino male rats (rattus rattus norvegious) of neonate, 3, 6, 9, 12, and 18- months were selected. Paraffin blocks were performed, sectioned and stained with PAS stain.Analysis of the PAS stained sections by microspectrophotometry at 510 nm wave length. For the test group, mean absorbance, standard deviation, maximum, minimum, and mode values were estimated and compared with the control groups.ResultsA significant difference in PAS absorbtion between test and control groups, and among different age groups, being increased with age.ConclusionThe variation in PAS absorbtion with aging indicates that the glycogen content in skeletal muscle increase with aging, this could be due to the influence of age on skeletal muscle glucose transport and glycogen metabolism.Key wordsSkeletal muscle, PAS, Glycogen, Microspectrophotometry


Article
Digital lateral cephalometric assessment of maxillary sinus dimensions in different skeletal classes

Authors: Ayman H. Urabi ايمن عرابي --- Lamia H. Al-Nakib لمياء النقيب
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2012 Volume: 24 Issue: 1 Pages: 35-38
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: Maxillary sinus is the largest of the four paranasl sinus, among the paranasal sinus its plays an importantrole in the formation of facial contours. Therefore, knowledge of the development and size of the maxillary sinus maybe crucial for diagnosing and treating various cases of malocclusion. The purpose of this study is to evaluate theeffect of malocclusion in three skeletal classes on maxillary sinus dimensions.Material and methods: Total of 120 lateral cephalograms were derived from subjects with skeletal Class I, Class II, andClass III malocclusions, classified on the basis of the A-N-B angle. Each malocclusion group consisted of 20 males and20 females ranging in age from 12 to 16 years. Two linear measurements and three area measurements were madeto evaluate maxillary sinus size. The procedure was accomplished by mean of computer and Auto Cad program.Results: it had been found that maxillary sinus dimensions were significantly Larger in male than in females in differentskeletal malocclusion classes, skeletal malocclusion classes has no effect on dimensions of maxillary sinus except inmale class II skeletal malocclusion.Conclusion: Skeletal classes malocclusion has no effect on dimension of maxillary sinus except in male class II skeletalmalocclusion, male showed significantly greater maxillary sinus length, maxillary sinus height, and maxillary sinus areathan that of female in all skeletal classes.


Article
Clinical significance of sella turcica morphologies and dimensions in relation to different skeletal patterns and skeletal maturity assessment

Authors: Kasim A. Obayis قاسم عبيس --- Ali I. Al-Bustani علي اسماعيل البستاني
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2012 Volume: 24 Issue: 2 Pages: 120-126
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: Sella turcica is a saddle-like structure based on the roof of the sphenoid bone and has an importantrole in orthodontic diagnosis and treatment planning. The aims of the study were to assess sella shape and size in anadolescent Iraqi sample in different skeletal classes and to verify the possibility of clinical application of sella turcicain skeletal maturity estimation.Materials and Methods: The study sample composed of (140) Iraqi adolescent subjects aged 10-16 years (91 females,49 males); every subject had true lateral cephalometric radiograph. The sample was subjected to 2 classifications:the 1st included three skeletal classes according to ANB angle, and the 2nd included accelerative and decelerativegroups according to maturity indicators of cervical vertebrae seen radiographically. In each classification, sella sizewas measured using three linear measurements (S.length, S.depth, and S. diameter).Results: Most of sella turcica measurements were not different statistically among the skeletal classes, and thatspecific sella turcica linear measurements can not be obtained for each specific skeletal class throughout thepubertal period. Normal sella was the predominant over the other morphological aberrations in both classificationsystems, while these morphologies occurred more frequently in class II and III. Sella depth and diameter weresignificantly higher in the decelerative than accelerative group, while non significant difference was foundconcerning sella shapes between the two groups.Conclusions: It was concluded that Sella depth and sella diameter measurements can be utilized clinically forpubertal growth phase determination, while sella morphology can not be diagnostic for the accelerative anddecelerative pubertal growth phases


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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