research centers


Search results: Found 8

Listing 1 - 8 of 8
Sort by

Article
Eruption Time Estimation of Permanent 1st Molar, Central &, Lateral Incisors in 5.5 - 10 Years Age Children at Al Ramadi City / Iraq

Loading...
Loading...
Abstract

The Parents consider tooth eruption as an important thing in thechild's life development, and they have often showed theirconcern about the timing of eruption of teeth. The purpose ofthis study were to Estimate the average age for eruption time ofPermanent 1st molar, central & lateral incisors in upper & lowerJaw (right & left) in both gender and to Compare the eruptiontime of these teeth between upper & lower Jaw ,right & left side,male &female. This study was conducted at Al Ramadi City /Iraq, where the sample was consisted of “786” children (391male & 395 female) of age 5.5 years to 10 years were theytaken randomly from various schools. Eruption of variouspermanent teeth (1st Molar, Central & Lateral Incisors teeth)were noted in both jaws and both sides. In our study we foundthat the permanent 1st molars were the first permanent tooththat erupts in all children at the age between 5.87 – 7.96 yearson both jaws and on both right and left sides with the mean ageof eruption at 6.57 ± 0.55 years in lower jaw and 6.62 ± 0.53years in upper jaw. In addition to that our study showed that thenext permanent teeth to erupt were central incisors which eruptat the age between 6.14 – 8.93 years on both jaws and on bothright and left sides with the mean age of eruption at 7.23 ± 0.61years in lower jaw and 6.29 ± 0.57 years in upper jaw. Finally,the eruption of permanent lateral incisors were at the agebetween 7.66 – 9.93 years on both jaws and on both right andleft sides with the mean age of eruption at 8.89 ± 0.56 years inlower jaw and 8.93 ± 0.55 years in upper jaw. The teeth eruptedin female earlier than male and in the lower Jaw than upperJaw. In the most cases the right lower teeth erupted earlier thanthe other quadrant of both jaws. In general, we found that therewas delay in the time of eruption of nearly all the teeth thatwere included in this study.


Article
Enamel Hypoplasia among Tikrit City School Children Aged 6 Years to 13 Years Old

Author: Azhar A. Hussien ازهار عماش حسين
Journal: Tikrit Journal for Dental Sciences مجلة تكريت لعلوم طب الاسنان ISSN: 20731213 Year: 2017 Volume: 5 Issue: 1 Pages: 115-120
Publisher: Tikrit University جامعة تكريت

Loading...
Loading...
Abstract

Enamel hypoplasia: its deficiency could be occurring when the enamel of the tooth does notform completely; this is may be due to many diseases or malnutrition. Enamel hypoplasiacould be appear as horizontal lines or chain of grooves or pits over the outer surface of thetooth. The purpose of this current study was to find out the prevalence of enamel hypoplasiafor the permanent and deciduous teeth in primary school children in Tikrit city, becausechildren with enamel hypoplasia can suffer from cosmetic issues, tooth sensitivity andincreased risk of dental caries. This current study is cross-sectional study was conductedthrough a clinical examination of teeth among 720 children of age rang (6 to 13) yearsenrolled in primary public schools of Tikrit city; they were accepted to participate in studyafter the aim of study was explained. The prevalence of enamel hypoplasia was studied inrelation to age and gender. Diagnosis of enamel hypoplasia takes place by well traineddentist. The prevalence of enamel hypoplasia was founded to (6.2%); boys more affectedthan girls with odds ratio 1.03 and there was no statistically significant differences. Theanterior teeth were the most affected teeth with enamel hypoplasia specially the upperpermanent central incisor (2.9%). Developmental enamel hypoplasia has a high level ofimportance because of being predictors of dental caries. Children suffered from enamelhypoplasia require a preventive intervention as a priority and early treatment.


Article
Dental Caries and Salivary Streptococcus Mutans in Relation to Primary and Permanent Dentition

Loading...
Loading...
Abstract

Background : Streptococcus mutans has been implicated as a principle microbial agent in the pathogenesis of dental caries. The aim of this study was to compare caries experience and salivary Streptococcus mutans count among groups of children having primary dentition and adults having permanent dentition.Materials and Methods: The sample consisted of 100 children with an age of 4 – 5 years old and 100 adults with an age of 21 – 22 years old in Baghdad city. Dental caries was examined for the whole dentition and bacteriological analysis was done for the salivary sample to estimate the count of Streptococcus mutans in saliva.Results: Caries experience of adults was significantly higher than that of children while salivary S.mutans count was significantly higher among children than the adults. Positive correlation of S. mutans with decayed surface was stronger than that with (dmfs/DMFS) for both children and adults.Conclusion : S. mutans count was significantly higher among children than adults and caries experienc of permanent teeth was significantly higher than that of primary teeth.


Article
Time of Emergence of Permanent Teeth and Impact of Nutritional Status among 4-15 Years Old Children and Teenagers in Basrah City /Iraq

Authors: Hiyam S. Ahmed هيام احمد --- Zeyneb A. Al-Dahan زينب عبد الرضا الدهان
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2016 Volume: 28 Issue: 4 Pages: 134-140
Publisher: Baghdad University جامعة بغداد

Loading...
Loading...
Abstract

Background: The timing of eruption of permanent teeth is of considerable importance to the dental health planning for diagnostic, preventive and therapeutic measures for children and teenagers. The purposes of this study were to determine timing of maxillary and mandibular permanent teeth emergence (except third molars) and to evaluate the effect nutritional status by anthropometric measures on the eruption time of permanent teeth, investigations had been done according to jaw and gender variations.Materials and Methods: This study was conducted among four to fifteen years old children and teenagers from kindergarten and schools in Basrah city in the south region of Iraq. The total sample composed of 1807 children and teenagers that were collected randomly from kindergartens, primary and secondary schools in Basrah city.The data were statistically analyzed by using probit model in order to compute the median 5th and 95th percentile range of emergence. Athropmetric measures of height and weight were used for the purpose of assessment of nutritional status. The indices include: Weight for age, Height for age and Weight for height; each was considered as in term of standard deviation score (Z – score) as primary indicator of underweight, stunting and wasting respectively. The statistical significance of differences in mean of a normally distributed variable (nutritional indices z score) between 2 groups was assessed by independent samples t-test.Results: The results showed significant differences (p<0.05) between the timing of maxillary and mandibular teeth emergence in girls and boys, with earlier emergence in girls , also the mandibular teeth emerge before their maxillary opposing teeth in both sexes except for premolars .The prevalence of malnutrition according to height for age, weight for age, and weight for height nutritional status indicators were found to be 7.4 %, 3.7 % and 1.5% respectively.The results showed that among well-nourished children and teenagers described by height for age nutritional status indicator, most teeth were significantly erupted earlier than stunted except the lateral incisor which erupted earlier in stunted boys than well-nourished boys but the difference was not significantly accepted. The greatest difference of median eruption age of permanent teeth between well -nourished and stunted found in girls in the second molar tooth.Conclusions: Records indicated that the Iraqi children exhibit variation in their times of permanent teeth emergence when compared with other studies, and among well-nourished children and teenaged described by height for age nutritional status indicator, most teeth were significantly erupted earlier than stunted children and teenagers


Article
Concentrations of selected elements in permanent teeth and enamel among a group of adolescent girls in relation to severity of caries

Authors: Shahba’a M. Al-Jorrani شهباء الجوراني --- Sulafa K. El- Samarrai سلافة السامرائي
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2013 Volume: 25 Issue: 1 Pages: 176-180
Publisher: Baghdad University جامعة بغداد

Loading...
Loading...
Abstract

Background: Human teeth considered to be an important etiological host factor in relation to dental caries throughits morphology and composition. Elements may incorporate in tooth structure during pre and post-eruptive periodchanging the resistance for caries. The aims of this study were to determine the concentration of selected major(Calcium and phosphorus) and trace elements (Ferrous iron, nickel, chromium and aluminum) in permanent teethand enamel among a group of adolescent girls in relation to severity of dental cariesMaterial and Methods: The study group consisted of 25 girls with an age of 13-15 years old referred by Orthodontistsfor extractions of upper first premolars (two sides). Tooth and enamel samples were prepared for chemical analysisaccording to method described by Lappalainen and Knuttila (1979). Dental caries was diagnosed by both clinicaland radiographical examinations following the criteria of D1-4MFS index described by Muhlemann (1976). All datawere analyzed using SPSS version 19.Results: The concentration of major elements in teeth and enamel (measured in % of dry weight) showed that Caions were higher than P ions. On the other hand the concentration of trace elements in teeth and enamel samples(measured in ppm) showed that Al ions was the highest followed by Ferrous Fe then Ni ions, while Cr ions were theleast in concentration. All elements showed statistically highly significant difference in concentration between teethand enamel samples. Ca/P ratio was higher in enamel than tooth, but the difference was statistically not significant.Major elements (calcium and phosphorus) in tooth and enamel samples recorded negative correlations with DMFS.Trace elements except chromium ions recorded positive correlations with DMFS. They were not significant except fornickel ions in tooth and aluminum ions in enamel.Conclusions: The presence of these elements in both teeth and enamel samples indicated that these elementspresent in our environment; as foods, water, and air so they incorporate through out the tooth layers during the preeruptiveperiod of tooth development, and incorporate the outer enamel surface during the demineralization andremineralization processes that occurs in the post-eruptive periods. Ca and p ions play an important role inmineralization of tooth and enamel. Cr ions may play a role in improving mineralization and crystallity of teeth, whileFe, Ni and Al may act as cariogenic elements


Article
The effect of nutritional status on mesiodistal and bucco/ lingual or palatal diameters of permanent teeth among fifteen years old students

Authors: Zaid Saadi Hasan Ahmed زيد سعدي حسن احمد --- Ban Sahib Diab بان صاحب ذياب
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2016 Volume: 28 Issue: 2 Pages: 108-114
Publisher: Baghdad University جامعة بغداد

Loading...
Loading...
Abstract

Background: Malnutrition during human growth affects the size of the tissues at different stages of life, bodyproportions, body chemistry, as well as quality and texture of tissues. Teeth are particularly sensitive to malnutrition.Malnutrition may affect odontometric measurement involving tooth size dimensions. The aim of this study was to estimatethe effect of nutrition on teeth size dimension measurements among students aged 15 years old.Materials and methods: This study was conducted among malnourished group in comparison to well-nourished groupmatching with age and gender. The present study included 167 students aged 15 years (83 malnourished and 84 wellnourished).The assessment of nutritional status was done by using body mass index (BMI). Odontometricmeasurements included three different orientations. For both upper and lower study models, photographs were takenusing special photographic apparatus for each student, and the data were then analyzed using special computersoftware. For permanent dentitions, two linear measurements (mesiodistal and bucco lingual or palatal) were utilized,representing tooth diameters for each tooth.Results: Among students aged 15 years, the findings revealed that all means of mesiodistal and bucco-lingual diametersvalues of maxillary and mandibular teeth were lower among malnourished than well-nourished groups with statisticallysignificant, except for mesiodistal diameters of both second molar, second and first premolar of maxillary teeth,second premolar, first premolar and lateral incisor of mandibular teeth and for bucco-palatal diameters of secondand first premolar of maxillary teeth, second molar and lateral incisor of mandibular teeth.Conclusion: Malnutrition effect on minimize the odontometric measurements (mesiodistal and bucco-lingual diameters)among students aged 15 years


Article
Dental caries changes between(1989) and(2001) in children aged(3-14) years in KasaFakhra and Al-Shamsiat villages,Ninevah Governorate, Iraq

Authors: Tarik Y KHAMRCO --- Layla A MAKANI --- Karam H JAZRAWI
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2002 Volume: 2 Issue: 3 Pages: 269-278
Publisher: Mosul University جامعة الموصل

Loading...
Loading...
Abstract

This study was designed to assess the trend of dental caries among children aged(3-14) years in KasaFakhira and Al-Shamsiat rural areas and compare the results with those obtained from the first study that conducted (12) years ago.The study comprised(255) chili aged(3-14) years, 117 (45.88%) males and 138 (54.12%) females.The sample was divided into four age groups (3-5),(6-8),(9-11) and (12-14) years. The numbers of children for each group were (31,62, 92 and 70) respectively. Clinical examination was carried out in the village school in good natural daylight using plane mouth mirror and sickle-shaped caries explorer. The index used was based on the WHO criteria and examination was done for both primary and permanent teeth.The results indicated that the mean DMFT for children aged (6-12) years regarding the total sample was (1.55), whereas the previous study recorded (3.06). The general mean for boys in this study (1.54) was nearly similar to the girls (1.56), while the boys in the previous study recorded a lower meanthan girls (2.44) and (3.52), respectively.Through the results, it could be noted that the mean dmft for primary teeth was (1.96) regarding the age group (3-5) years, increased with increase age to (2.43) for the age group (6-8) years,and decreased due to normal shedding of primary teeth and eruption of permanent teeth to (1.27) and (0.59) regarding age groups (9-11) and (12-14) years, respectively. All these means were lower than those in the previous study which were (3.7), (4.5), (2.6) and (0.9) respectively. The boys recorded lower mean of dental caries than girls (1.35) and (1.85) respectively. The results,therefore,confirmed that the trend of dental caries for this young age group was decreased gradually throughout this period (1989-2001) due to the sharp decrease in the quantity of sugar consumed in the previous years because of the unfair embargo on Iraq. This lowered percentage of dental caries could be maintained so and further decreased in the future.


Article
CLEANING EFFICACY OF WAVEONE, PROTAPER AND MANUAL INSTRUMENTS IN PREPARATION OF PERMANENT TEETH: A COMPARATIVE IN VITRO STUDY
فاعلية تنظيف المبارد الدوارة ( Pro Taper , Wave one) والمبارد اليدوية لتحضير اقنية جذور الاسنان الادائمية دراسة مختبر مقارنة

Author: BAHAR JAAFAR SELIVANY بهار جعفر سليفاني
Journal: Duhok Medical Journal مجلة دهوك الطبية ISSN: ISSN: 20717334 (online)/ ISSN: 20717326 (Print) Year: 2015 Volume: 9 Issue: 1 Pages: 19-29
Publisher: University of Dohuk جامعة دهوك

Loading...
Loading...
Abstract

ABSTRACTBackground and Objective: Efficient biomechanical preparation of the root canal system isessential for achieving the biological and mechanical objectives of root canal treatment. Thisstudy was aimed to compare the cleaning efficacy of manual instrument, ProTaper andWaveOne rotary systems in the preparation of root canals.Materials and Methods:Sixty permanent mandibular premolars with single canal were used in this study. Accesscavities were prepared using diamond burs and Indian ink was injected into canals. The teethwere randomly divided into three experimental groups and one control group of 15 teetheach. For each experimental group, either manual instruments or rotary instruments(WaveOne and ProTaper) were used to prepare root canals. In the control group, the canalswere filled with Indian ink and irrigated with normal saline but not instrumented. After that,the teeth were cleared with Methyl salicylate, and the removal of Indian ink was evaluated inthe cervical, middle and apical thirds of the roots by using Stereomicroscope. Kruskal –Wallis and Mann-Whitney U tests were used for Statistical analysis.Results:The efficacy of Rotary instruments (ProTaper and Wave One) was much better than manualinstrument in all thirds of the prepared root canals. Compared to manual and control groups,ProTaper and WaveOne files showed more ink removal with a highly significant difference(P > 0.05). Differentially, ProTaper exhibited better results than WaveOne and showed moreink removal, but the difference didn't achieve statistical significance (P>0.46).Conclusion:ProTaper and WaveOne showed better cleaning efficacy when compared to manualinstrument in all thirds of the canal. ProTaper files performed better than WaveOne althoughthe difference between them was statistically not significant.

الخلفية والاهداف: إن التنظيف الفعال وتشكيل القناة من الامور الاساسية لتحقيق الاهداف الاحيائية والميكانيكية لمعالجةفي (WaveOne و ProTaper) قنوات جذور الاسنان. تهدف الد ا رسة الى مقارنة فعالية المبارد اليدوية، والأنظمة الدوارة تحضير قنوات جذور الاسنان الدائمية.طرق البحث: استخدم ستين سنا من الضواحك السفلية الدائمية ذوات القناة الواحدة في هذه الد ا رسة. تم إعداد تجاويف الوصول وحقن الحبر الهندي في القنوات. تم تقسيم الأسنان بشكل عشوائي إلى ثلاث مجموعات تجريبية ومجموعة ضابطة واحدة بواقع ١٥ سن لكل مجموعة. بالنسبة للمجموعة التجريبية، استخدمت المبارد اليدوية أو االمبارد الدوارةلإعداد القنوات الجذرية. أما المجموعة الضابطة، فقد ملئت القنوات بالحبر الهندي ثم (ProTaper و WaveOne)غسلت بمحلول ملحي ولم تستخدم اي اداة او مبرد لاعدادها. بعد ذلك، تم تطهير الأسنان باستخدام ميثيل الساليسيلات،وجرى تقييم إ ا زلة الحبر الهندي في الثلث العنقي والوسطي والقمي لجذور الاسنان باستخدام مجهرMann- و Kruskal -Whallis- تم إج ا رء التحليل الإحصائي باستخدام فحصي الاحصاء .Stereomicroscope .Whitney U test أفضل من ألاداة اليدوية في إعداد كل اج ا زء قنوات (WaveOne ProTaper) النتائج: كانت فعالية الأدوات الدوارة مزيد من إ ا زلة الحبر مع فارق معتوي واضح مع المجموعة اليدوية WaveOne و ProTaper الجذور. وأظهرت مبارد وأظهرت المزيد من إ ا زلة الحبر، ولكن الفرق WaveOne أظهرت نتائج أفضل من ProTaper .(٠.٠٥

Listing 1 - 8 of 8
Sort by
Narrow your search

Resource type

article (8)


Language

English (8)


Year
From To Submit

2017 (1)

2016 (3)

2015 (1)

2013 (1)

2006 (1)

More...