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Article
Influence of Removable Orthodontic Appliance Dr. Saba Fouad Jaburon Oral Microbiological Status

Author: Saba Fouad Jabur
Journal: Journal of the Faculty of Medicine مجلة كلية الطب ISSN: 00419419 Year: 2008 Volume: 50 Issue: 2 Pages: 199-202
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: the placement of orthodontic appliances creates a favorable
environment for the accumulation of microbiota, therefore this study is to assess
the relationship between removable orthodontic appliance and oral microflora.
Materials and methods: a sample 45 patients who come to orthodontic
department at the collage of dentistry/Baghdad university, divided into 3 groups:
group 1 (15) without appliance, group2 (15) with appliance for 2 weeks-2 months,
and group 3 (15) with appliance for 2 -4 months, then examine the oral microflora
and compared between the 3 groups.
Results: the result showed eleven types of microorganisms appear in group 3 then
followed by seven types in group 2 but only three types of microorganisms in
group 1.
Conclusion: there is need to educate the patients who received orthodontic
appliance about their oral hygiene because oral microflora were changed among
orthodontic patients.


Article
Causes of Primary and Permanent Teeth Extraction in Children Aged 3–12 Years in Mosul City

Author: Aghareed Gh. Mohammed
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2008 Volume: 8 Issue: 12 Pages: 238-245
Publisher: Mosul University جامعة الموصل

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Abstract

Aims: To establish the different reasons of primary and permanent teeth extraction and the most frequent tooth type extracted among children attending the pedodontic and preventive dentistry clinic atCollage of Dentistry ,Mosul University. Materials and Methods: Out of the 375 pediatric patients aged 3–12 years–old attending pedodontic and preventive dentistry clinic, 130 child patients were selectedfor this study. The teeth were examined carefully, the tooth that needed to be extracted was recorded to determine the cause of extraction for each tooth according to the criteria gathered and modified from the following researchers, Cahen et al; Kay and Blinkhorn and Cawson. Results: Statistical results showed highly significant difference at p < 0.001 between primary and permanent teeth and thecause of tooth extraction, as extraction due to caries was the main reason for primary tooth extraction while extraction for orthodontic treatment was the major cause for permanent tooth extraction. The firstpremolar recorded 43.6% this result showed highly significant difference at p < 0.001 compared with other permanent teeth to be extracted, while the first primary molar registered the higher value as an extracted primary tooth type (35.6%) with high significant difference at p < 0.001. Conclusion: Althoughcaries and it is sequelae were the most common causes of premature loss of a primary tooth, an increasing need for tooth extraction for orthodontic treatment in this population of children was observed.


Article
Orthodontic Treatment and Temporomandibular Joint Condylar Position Relationship with Disk Displacement (Magnetic Resonance Imaging Study)

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Abstract

Temporomandibular joint (TMJ) is a complex synovial articulation between the mandibular condyle and the glenoid fossa of temporal bone. The question of whether a relationship exists between orthodontic treatment, abnormal condyle and disk position, and temporomandibular disorders has been investigated for many years. Despite the abundance of studies, the question continues to trouble orthodontists.This study conducted to assess the relationship between orthodontic treatments, abnormal condyle and disk position, with temporomandibular disorders, and to study the disk- condyle relationship in term of presence or absence of anterior disk displacement. By mean of Magnetic Resonance Imaging a cross sectional investigation for the condyles of temporomandibular joints (TMJs) and disk position was conducted to 50 TMJs of 25 patients between 19-30 years of age who had undergone orthodontic treatment (by upper and lower fixed orthodontic appliances with extraction of maxillary first premolar only for treatment of class II division 1 malocclusion), and 50 TMJs of 25 patients who had not yet received orthodontic treatment from the same class and matched age group.The results of this study showed that 30% of pre-treatment group have anterior disk displacement in comparison to 26.0% of the post treatment group. The condyle position is more concentric in post treatment group than pre-treatment, and the position of the disk is not affected by orthodontic treatment. This conclude that condyle position of the TMJ may be affected by orthodontic treatment, but the disk position is not.


Article
The Use of Computer Technology in Dental Arch Crowding Assessment

Author: Dr. Mehdi Abdul Hadi Al-Rubayee. B.D.S MSc * د. مهدي عبد الهادي
Journal: MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان ISSN: 18138500 Year: 2008 Volume: 5 Issue: 4 Pages: 372-383
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

Background: Correct alignment of teeth is a fundamental goal of Orthodontic treatment. The accurate assessment of dental crowding and the space required to alleviate it, is critical for correct orthodontic diagnosis and treatment planning.Objectives: To assess dental crowding by using two different methods, which are manual and computerized in order to compare the advantages and disadvantages of both methods.Methods: In this cross –sectional study, we studied a convenient sample of 100 individuals (50 male and 50 female) with different degrees of crowding. Upper and lower dental casts were obtained for each subject and these casts were analyzed by using two methods, manual and computerized.Results: It was found that there is a significant difference between the manual and the computerized method in all measurements (crowding, space available and space required). Also, it was found that the computerized method is a quick method and more practical for the storage of a large number of dental casts and more reliable for the measurement of the space available than the manual method. But, there was some difficulty in the assessment of severely crowded groups (>4mm).Conclusions: The degree of dental crowding increased when the teeth size increased and arch perimeter decreased. The degree of crowding in the upper arch is more affected by the size of the teeth rather than the size of the arch, while the degree of crowding in the lower arch is more affected by the arch size rather than teeth size.


Article
Influence of different recycling protocols on load deflection of nickel titanium orthodontic wire

Author: Dr. Mustafa M. Al-Khatieeb. B.D.S., M.Sc. * د. مصطفى الخطيب
Journal: MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان ISSN: 18138500 Year: 2008 Volume: 5 Issue: 1 Pages: 71-79
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

The purpose of this study was to investigate the changes in the load deflection of nickel titanium orthodontic wire after different recycling protocols. A spooled 0.014 inch nickel titanium wire was separated into 7 groups: as received condition (T0,control group),treated in artificial saliva for 4 weeks (T1), treated in artificial saliva and autoclaved (T2), treated in artificial saliva and dry heated (T3), treated in artificial saliva and disinfected by glutaraldehyde (T4), treated in artificial saliva and disinfected by iodophor (T5) and treated in artificial saliva and disinfected by chlorhexidine (T6).The changes in the load deflection were observed by special test apparatus based on 3-point bending mechanism, the findings of the current study showed that there was highly significant difference in mean load deflection of nickel titanium wire between all recycling protocols (P< 0.0001). The recycling by sterilization of the wire by heat autoclave or disinfection by chlorhexidine both seem to be the best recycling protocols because of lowest detrimental effect on the load deflection, while the disinfection by glutaraldehyde or iodophor shows intermediate detrimental effect on the load deflection, and the sterilization by dry heat seems to be the worst recycling protocol because it shows highest detrimental effect on the load deflection value.

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