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Article
Digitalized measurement of maximum bite force in Iraqi adult sample aged 18 – 25 years with different malocclusion groups

Authors: Dhiaa K. Al- Saadi ضياء الساعدي --- Ausama A. Al – Mulla اسامة احمد الملا
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2011 Volume: 23 Issue: special issue Pages: 146-150
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: Information concerning the maximum bite force in human population is important to clinicalorthodontics. Additionally, the influence of bite force on the vertical stability of any treatment result is important. Thenew position of the dentition should be compatible with the dynamics of the muscular and occlusal forces in allplanes. This study was conducted to assess the maximum bite force in the molar (left and right) and incisor region ofIraqi adult persons aged 18-25 years.Materials and method: The total sample size is (150) persons (75 male, 75 female) of untreated Iraqi subjects dividedaccording to the class of malocclusion. The maximum bite force measurements were performed by a digital device(GM10) placed in the first molar area unilaterally on both the left and right sides which was used especially for thisstudy. After that measured the maximum bite in the right central incisor region.Results: The maximum molar force was higher in class III followed by class II and then class I. The maximum incisalforce was higher in class I followed by class II then class III.Conclusions: there was a very high significant difference between molar and incisal bite force. There was nonsignificant difference between right and left side in all classes of malocclusion. Generally there was a very highsignificant difference regarding the genders, males have a greater bite force than females for class I, II, IIImalocclusion.


Article
The skeletal features of Iraqi adult nasal obstruction sample (A posteroanterior cephalometric comparative study)

Authors: Saief A. Mustafa سيف مصطفى --- Ausama A. Al-Mulla اسامة احمد الملا
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2012 Volume: 24 Issue: 1 Pages: 127-132
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: Chronic respiratory obstruction can be produced by prolonged inflammation of the nasal mucosaassociated with allergies or chronic infection. It can also be produced by mechanical obstruction any where withinthe nasorespiratory system from the nares to the posterior nasal change. There may be a relation between theskeletal features of the facial skeleton and the respiratory pattern and this relation should be studied carefully. Thisstudy aimed to study and compare the relation between the nasal obstruction and the skeletal features of the facialskeleton in adults between the sample and control groups and to find the Pearson correlation coefficient betweenthe variables related to the nasomaxillary complex for the sample and control groups.Materials and methods: The sample is composed of 50 Iraqi Arab adult patients out of 167 with age range from 18-35years, having nasal obstruction had been examined in Tikrit general hospital and identified by the E.N.T. specialist.The control group will be 50 subjects out of 150 in the same age group and also had been examined and identifiedby the E.N.T specialist in Tikrit general hospital as having no nasal obstruction. Twelve linear measurements and a ratiowere determined on each radiograph. For each variable, the arithmetic mean, the standard deviation, and thestandard error were calculated. For statistical evaluation, an independent-samples t-test was performed. ThePearson correlation coefficient was calculated to indicate the relationship between nasal and maxillary variables.Results: There was no significant difference between the sample and control groups for the skeletal features of thefacial skeleton except the ramal height of the right and left sides and there was weak correlation between the nasaland maxillary variables for the sample and control groups.Conclusion: There is no effect of the nasal obstruction on the skeletal features of the facial skeleton in Iraqi adultsample.


Article
Tooth attrition patterns in a group of Iraqi adults sample with different classes of malocclusion (A comparative study)

Authors: Issam M. Abdullah عصام عبد الله --- Ausama A. Al- Mulla اسامة احمد الملا
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2012 Volume: 24 Issue: 2 Pages: 114-119
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: Tooth attrition is wearing away of tooth structure during mastication. This study investigated tooth wearpatterns in adults with different classes of malocclusion and compared them with normal occlusion.Materials and methods: The sample consisted of 363 subjects that were divided into 5 groups with an age range “18-25” years: 85 normal occlusion, 128 class I with crowding, 90 class II division 1, 30 class II division 2 and 30 class III.Dental wear was assessed by using a modified version of the tooth wear index.Results:1. The class I malocclusion group had statistically greater tooth wear in incisal surfaces of maxillary central and lateralincisors, and mandibular lateral incisors than did the normal occlusion.2. The class II division 1 group had statistically greater tooth wear in the occlusal surfaces of maxillary secondpremolars, mandibular first and second premolars. Buccal surfaces of mandibular canines, mandibular secondpremolars and mandibular first molars than did the normal occlusion.3. The class II division 2 malocclusion group had statistically greater tooth wear in labial surfaces of mandibularcentral and lateral incisors. Buccal surfaces of mandibular second premolars, mandibular first molars. Occlusalsurfaces of maxillary first and second premolars and mandibular second premolars than did normal occlusion.4. The class III malocclusion group had statistically greater tooth wear in the occlusal surfaces of maxillary first andsecond premolars than did normal occlusion.Conclusion: In conclusion subjects with normal occlusion and those with different classes of malocclusions havedifferent tooth wear patterns


Article
Relationship of maximum bite force with craniofacial morphology, body mass and height in an Iraqi adults with different types of malocclusion

Authors: Ghufran D. Awad غفران عواد --- Ausama A. Al – Mulla اسامة احمد الملا
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2013 Volume: 25 Issue: 1 Pages: 129-138
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: Information concerning the maximum bite force in human population is important to clinicalorthodontics. Additionally, the influence of bite force on the vertical stability of any treatment result is important. Thenew position of the dentition should be compatible with the dynamics of the muscular and occlusal forces in allplanes. This study was conducted to 1) to measure and compare maximum bite force, body height and weightamong normal occlusion and malocclusion groups (cl I,cl II,cl III) in both gender 2) to evaluate the correlationbetween bite force and craniofacial morphology, body height and weight.Materials and Methods: The sample consists of 100 Iraqi adult subjects aged 18-25 years. It was classified in to fourgroups: cl I normal occlusion, cl I malocclusion, cl II malocclusion, and cl III malocclusion according to(skeletal) thevalue of ANB angle and (dental)the Angle classification. Each group consist of 25 (13 male, 12 female), Maximumbite force was measured by a digital device (GM10, Naganokeiki, Japan) by putting the sensor part of occlusalforce meter on first molar region, body height and weight were measured by using the Length and WeightMeasuring Standard (Tanita, 2008) and craniofacial measurements were achieved by analysis of lateralcephalometric radiographResults: The highest mean value of maximum bite force was found in normal occlusion followed by class IImalocclusion and then class I malocclusion and the lowest value was found in class III malocclusion, class I skeletalrelationship (cl I normal occlusion & cl I malocclusion group) had larger values of body weight when compared withskeletal class II& class III .Regarding the gender, mean values of maximum bite force and body height are higher inmale than female in normal occlusion and malocclusion groups, There is a positive correlation between maximumbite force and body height and weight in normal occlusion and class I malocclusion ,there is a positive correlationbetween maximum bite force and palatal plane, Ramus plane, mandibular plane, posterior facial height, cranialbase, dentoalveolar height, while there is a negative correlation with anterior facial height, Gonial angle, SN-Mp¢ª,PPMP&SN-PP¢ª angles.Conclusion: The normal occlusion group had larger values of bite force than malocclusion group,the maximum biteforce, body height is gender related, larger body build up was usually associated with larger bite force in class Iskeletal relationship, Individuals with characteristics of larger maxilla ,larger mandible, larger cranial base ,shortanterior facial height long posterior facial height, flat mandibular plane had the largest value of bite force.


Article
Incidence of Cleft Lip and Palate in Al-Ramadi City (Descriptive Epidemiological Study)

Authors: Saria Dhakir Mahmood سارية ذاكر محمود --- Ausama A. Al-Mulla اسامة احمد الملا
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2016 Volume: 28 Issue: 2 Pages: 139-144
Publisher: Baghdad University جامعة بغداد

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Abstract

Background Birth defects are one of the causes of pediatric disability and mortality in all around the world. Data onbirth defects from population-based studies originating from developing countries are lacking. Cleft lip (CL), cleft lipand palate (CLP), and isolated cleft palate (CP), collectively termed oral clefts, occur in all races, both sexes, and allsocioeconomic groups and vary internationally (1). The main aim of this research is to establish the frequency of cleftlip and/or palate in the population of the Al-Ramadi City, and to characterize the demographic features of affectedindividuals and find possible risk factors.Materials and methods We conducted a survey of the Educational Maternal and Pediatric Hospital in Al-Ramadi city.The sample population comprised all 5100 babies born at Al-Ramadi City during the 5 months period 1 January 2013to 31 May 2013. Statistical tests used Pearson’s chi-square test, Student’s t-test and Spearman’s correlation coefficienttest according to the type of parameter tested.Results: During the study period 15 babies were born with oro-facial cleft. The overall incidence of cleft lip and palatewas 2.94 per 1000. Cleft palate was significantly more frequent in male than female babies (P = 0.81).Conclusions: A high incidence of facial clefts in this city was seen. This change may be attributed to the wars thatoccur in Iraq in the last years so increased pollutions and decreased prenatal care in the Iraqi population as part ofsocial and health-related behavior changes


Article
Soft tissue impingement and lip form in Iraqi teenagers

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Abstract

Background: Soft tissue impingement and lip form have often been overlooked in previous epidemiological surveys.Materials and Methods: About seven thousand 13 year olds with no history of orthodontic treatment were selected from six governorates (Baghdad the capital, Ninevah, Basrah, Diyala, Anbar and Najaf). An intra-oral clinical examination was used to assess traumatic overbite causing soft tissue impingement and the lip form of each student.Results: Soft tissue impingement was found in 2.7% (2.5% palatally and 0.2% labially). Normal lip form was found in 80.7%, contracting lip form in 14.7% and lip trap in 4.6% of the sample. All the previous were non-significantly related to gender and residency.Conclusion: Iraqi children present a much mre favorable lip form than Western children

Keywords

Soft tissue --- impingement --- lip form

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