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Article
Stimulation of rabbit condyle growth by using pulsed therapeutic ultrasound (A radiographical and histological experimental study)

Authors: Mustafa A.Qaisi مصطفى القيسي --- Nidhal H. Ghaib نضال حسين غايب
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2012 Volume: 24 Issue: 2 Pages: 137-143
Publisher: Baghdad University جامعة بغداد

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Abstract

Backgrounds: Many difficulties faced the orthodontic clinician during treatment of class II malocclusion cases in thepreadolescence period in which treatment is done by growth modification of condyle , these difficulties are due tothe poor cooperation of the patients with the myofunctional appliances. The present research was carried out toevaluate the effect of Low Intensity Pulsed Ultrasound application on mandibular condyle of rabbit radiographicallyand histologically to evaluate the use of low intensity pulsed ultrasound in condyle growth modification in thetreatment of skeletal class II malocclusions in the growth period.Materials and Methods: The sample was 15 New Zealand male rabbits in which Therapeutic Ultrasound was appliedto the left condyle (treated group) for 28 days while the right condyle was without ultrasound application (controlledgroup), After animal sacrifying , the rabbit mandibles were dissected into two hemi mandible, left (treated) andright (control), radiographic image for each hemi mandible was done and three linear measurements were made,(Ramus height, condylar height and mandibular height). Then these hemi mandibles examined histologicallyincluding calculating chondrocyte number, osteocyte number, cartilage area calculation and subchondral bonearea measurements.Results: the results showed: The increasing of all linear measurements as a result of enhancement of chondrocytes,osteocytes, increase of cartilage area and bone area in the treated group. There is significant correlation betweenall linear measurements and chondrocyte and cartilage area.Conclusion: low intensity pulsed ultrasound can accelerate condyle cartilage growth


Article
The reliability of bisecting interpupillary perpendicular line, facial and dental laterality and coincidence in adult normal occlusion Iraqi sample (A photographic, cross sectional study)

Authors: Dina A. Hassan دينا حسن --- Nidhal H. Ghaib نضال حسين غائب
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2012 Volume: 24 Issue: special issue 1 Pages: 94-98
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: One of the primary reasons for patient’s to seek orthodontic treatment is esthetic or cosmetic reasons.The purpose of this study is to evaluate facial asymmetry which present in essentially all normal individuals and resultfrom a small size difference between the two sides, evaluate the correlation between maxillary and mandibulardental midlines with facial midline and to determine if there is gender differences in Iraqi adults.Material & method: The sample consist of 108 Iraqi adults (63 females, 45 males) aged 18-25 years with class I pattern.Clinical examination and digital photograph with cheek retractor were performed for each individual. The facialmidline was determined by the perpendicular bisecting of interpupillary distance. Three linear soft tissuemeasurements to evaluate facial asymmetry and two linear measurements to evaluate the correlation betweenfacial and dental midlines were measured for each photograph using AutoCAD program 2007.Result: A correlation analysis was performed to determine the correlation between facial and dental midlines. Thefollowing results were obtained:1-The left side of the face is wider than the right side in 63.8% of sample, 0% equal sides and 36.1% wider right side.2-Chin shifts to the left in 43.5% of the whole sample, 20.3% coincide with Fml and 37% shift to the right.3-There is no significant relationship between facial and dental midline (maxillary and mandibular).5-There is direct relationship between maxillary and mandibular dental midline.6-There was no gender differences in both facial and dental asymmetry

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