research centers


Search results: Found 13

Listing 1 - 10 of 13 << page
of 2
>>
Sort by

Article
Influence of different recycling protocols on load deflection of nickel titanium orthodontic wire (An in vitro study)

Author: Mustafa M. Al-Khatieeb
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2008 Volume: 20 Issue: 1 Pages: 105-110
Publisher: Baghdad University جامعة بغداد

Loading...
Loading...
Abstract

ABSTRACT
Background: The purpose of this study was to investigate the changes in the load deflection of nickel titanium orthodontic wire after different recycling protocols.
Materials and methods: A spooled 0.014 inch nickel titanium orthodontic 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.
Results: 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 showed high mean load deflection values which were closer to the control, while the disinfection by glutaraldehyde or iodophor showed intermediate load deflection values, and the sterilization by dry heat showed lowest mean load deflection value.
Conclusions: The different recycling protocols could decrease the load deflection value and this could be due to corrosive degenerative changes of the passive TiO2 film on the wire and subsequently detrimental effect on load deflection. Sterilization by the heat autoclave or disinfection by chlorhexidine both seem to be the best recycling protocols because both showed least detrimental effect on the load deflection because those protocols showed high mean load deflection values which were closer to the control, while the disinfection by glutaraldehyde or iodophor both showed intermediate detrimental effect on the load deflection because those showed intermediate load deflection value, and sterilization by the dry heat seems to be the worst recycling protocols because it showed highest detrimental effect on the load deflection because it showed lowest mean load deflection value among all examined recycling protocols.
Key words: Recycling, load deflection, nickel titanium wire. (J Bagh Coll Dentistry 2008; 20(1)105-110)

Keywords


Article
Bacteraemia Following Different Orthodontic Treatment Procedure

Author: Mustafa M. Al-Khatieeb* BDS, MSc
Journal: Journal of the Faculty of Medicine مجلة كلية الطب ISSN: 00419419 / 24108057 Year: 2009 Volume: 51 Issue: 2 Pages: 130-135
Publisher: Baghdad University جامعة بغداد

Loading...
Loading...
Abstract

Background: since the occurrence of transient bacteraemia is fatal following different dental procedures in patients at-risk of bacterial endocarditis, the purpose of this research was to estimate the percentage and nature of bacteraemia following four orthodontic treatment procedures which were: an upper alginate impression, separator placement, band fitting or placement, and arch wire adjustment on a fixed appliance.Materials and methods: the study group consisted of 40 patients (25 females and 15 males) ranging from 17-25 years of age attending Orthodontic Department in the College of Dentistry/Baghdad University, and out patients department from private clinic. The 40 patients were divided into four groups (10 patients each). A cannula was inserted into either the left or right antecubital fossa using an aseptic technique. A 5ml of blood was taken immediately before orthodontic treatment procedure and a second 5ml sample was taken 1-2 minutes after the procedure.Results: the blood samples showed a percentage of bacteraemia of 50%, 40%, 30%, and 20% in cases of post-band placement, post-separator placement, post-arch wire adjustment, and post-alginate impression procedures respectively.Conclusion: this investigation demonstrated that the placement of separator and fitting of band procedures could cause a significant bacteraemia, thus these procedures for patients at–risk of bacterial endocarditis should be placed in consideration, and prescribe the necessarily antibiotic coverage.


Article
Clinical performance comparison of a clear advantage series II durable retainer with different retainers' types

Author: Mustafa M. Al-Khatieeb مصطفى الخطيب
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2012 Volume: 24 Issue: 2 Pages: 127-136
Publisher: Baghdad University جامعة بغداد

Loading...
Loading...
Abstract

Background: The orthodontic retainers are either fixed or removable. Each has its own advantages anddisadvantages. The goal of the current study was to evaluate the new Clear Advantage Series II durable thermovacuumformed invisible orthodontic retainer material and compare the clinical performance of such retainer withthe most standard types of retainers (convention Clear Advantage Series I thermo-vacuum formed invisible retainer,Hawley, and the fixed lingual bonded retainers). The conducted study is the first attempt to evaluate and comparethe clinical performance of different retainers' types.Subjects and methods: Twenty finished fixed orthodontic patients starting the retention phase were divided into fourgroups. Each group consisted of five patients (3 females and 2 males), mean age ranged 18-30 years old. Membersof the first group were given the new thermo-vacuum formed invisible Clear Advantage Series II durable retainermaterial (CII), While the second, third, and fourth groups were given standard thermo-vacuum formed invisible ClearAdvantage Series I retainer material (CI), Hawley retainer (HR), and fixed lingual bonded retainers "cuspid tocuspid"(FR), respectively. Ten variables were applied on the twenty patients to evaluate the clinical performance ofthe four retainers' types, the ten variables were evaluated and judged by the operator with the patient as three nonparametriccategorical descriptions: superior (+), acceptable (±), and inferior (-) properties.Results: It was found that patients were compliant with all types of retainers initially, and the compliance decreasedat a much faster rate with both types of themo-vacuum formed retainers (CII and CI) than with HR and FR retainers,and patient's compliance is greater with HR and FR retainers than with CII and CI retainers. A comparison of the totalvariables of the clinical performance at total time intervals using chi-square showed that there was a significantdifference (P<0.05) in the acceptable categorical description between CII and CI retainers and very high significantdifference (P<0.001) between CII, HR, and FR retainers.Conclusion: it was found that the new thermo-vacuum formed Clear Advantage Series II durable retainer showed acombination of removable, comfortable, aesthetic, better speech, superior retention, relatively not producing badtaste and odor, hygienic, least soft tissue irritability, superior construction and chair-side time, and durable, it will bemore favorable clinical performance appliance to both the patient and the orthodontist


Article
Hypodontia in Down’s syndrome patients

Authors: Dheaa H. Abd Awn --- Mustafa M. Al-Khatieeb --- Nidhal H. Ghaib
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2009 Volume: 21 Issue: 1 Pages: 98-103
Publisher: Baghdad University جامعة بغداد

Loading...
Loading...
Abstract

ABSTRACT
Background: The intention of this study was to quantify the occurrence of hypodontia in a group of individuals with
Down syndrome.
Materials and method: The sample consisted of 164 subjects with Down syndrome with an age ranged 14-18 years,
the subjects were examined clinically, when radiographs were in need, orthopantomograph, occlusal, or periapical
were often taken to confirm the diagnosis.
Results: The results show a notably high prevalence of hypodontia in individuals with Down syndrome (45.2%) being
higher in females (47.4%) than males (42.3%), the hypodontia in the maxilla was higher than in the mandible and on
the right side of females was higher than the left side, while males show on the left side was higher than the right side
though this difference was not significant. The number of congenitally missing teeth also in females was higher than in
males; the most congenitally missing teeth were the lower second premolars, upper lateral incisors, lower second
premolars and lower lateral incisors respectively. The distribution of peg–shaped lateral incisors was 15% and more
unilaterally than bilaterally.
Conclusions: This study reveals a high prevalence of hypodontia (missing teeth and peg-shaped lateral incisors) in
patients with Down syndrome. No explanation other than genetics is immediately available to explain why
hypodontia should represent another phenotypic expression of this trisomy
Keyword:Down's syndrome, Hypodontia, Peg-shaped lateral incisors. (J Bagh Coll Dentistry 2009; 21(1): 98-103)

Keywords


Article
A cephalometric comparative study of pharyngeal sagittal dimension in different skeletal patterns

Authors: Mustafa M. Al-Khatieeb --- Reem A. Al-Aani --- Fakhri Abid Ali
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2011 Volume: 23 Issue: 1 Pages: 100-106
Publisher: Baghdad University جامعة بغداد

Loading...
Loading...
Abstract

ABSTRACT
Background: Because of the close relationship between pharynx and the dentofacial structures, this study was
conducted to find whether the pharyngeal sagittal dimension could be affected by the positional relationships
between jaws, and to determine the pharyngeal parameters difference in both genders in different skeletal patterns.
Subjects and method: The study sample consists of 120 digital radiographs of Iraqi subjects (60 males and 60 females)
attending Orthodontic Clinic in the College of Dentistry; University of Baghdad. The 120 radiographs were divided
into three groups (40 radiographs for each group) according to the ANB angles: ANB angle smaller than one degree
(Class III), between two and four degrees (Class I), and larger than four degrees (Class II), each group was further
divided into two subgroups according to gender (20 radiographs for each gender), eleven linear and two area
measurements were used to assess the pharyngeal structures.
Results: Student's t-test showed a significant difference (P<0.05) for t-PPW and Hy-APW2 measurements in all of the
three skeletal groups, with males had shorter t-PPW plane than females, and females had shorter Hy-APW2 plane
than males, on the other hand, Hy-APW4 plane and oropharyngeal area showed highest mean values in skeletal
class III, intermediate values in class I, and lowest mean values in class II in both males and females, F- test analysis of
variance showed highly significant differences (P<0.01) between all skeletal groups for total males and females in
regard t-PPW plane, Hy-APW2 plane, Hy-APW4 plane, and oropharyngeal area.
Conclusions: It can be concluded that the pharyngeal sagittal dimension have not been affected by gender type
except for t-PPW and Hy-APW2 planes, and the larger the ANB angle, the less Hy-APW4 and oropharyngeal area
measurements, and this may be attributed to the different location of the tongue, hyoid bone, and mandible in
skeletal class II malocclusion than other skeletal configurations.
Keywords: Pharyngeal sagittal dimension, skeletal patterns. (J Bagh Coll Dentistry 2011;23(1):100-106).

Keywords


Article
The relation of load deflection of nickel titanium orthodontic wires and the application of different fluoride containing tooth paste (an in vitro study)

Authors: Dheaa H. Abd Awn --- Mustafa M. Al-Khatieeb --- Nidhal H. Ghaib
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2007 Volume: 19 Issue: 1 Pages: 115-121
Publisher: Baghdad University جامعة بغداد

Loading...
Loading...
Abstract

ABSTRACT
Background: This study was designed to find the relation of load deflection of round 0.012 inch nickel titanium orthodontic wires, the application of different fluoride containing tooth paste, and the effect of immersion time in these fluoride containing tooth pastes on the load deflections of nickel titanium orthodontic wires.
Materials and method: The straight portion of preformed (arch form) round 0.012 inch nickel titanium orthodontic arch wire was cut and immersed either in one of the tested fluoride containing tooth pastes or in the controlled medium “artificial saliva”, where incubated at 37oC in special incubator at 2 time intervals (60 and 90 minutes).The load deflections of the wires were measured with a specially designed test apparatus based on the mechanism of 3-point bending test.
Results: The nickel titanium arch wire after immersion in acidulated monoflurophosphate tooth paste reveals lowest load deflection among the immersion test media (tooth paste), while the immersion in neutral sodium fluoride containing tooth paste reveals intermediate load deflection, and the immersion in stannous fluoride containing tooth paste reveals highest load deflection which is closest to that in artificial saliva. F- test by ANOVA table shows that there is a highly significant difference (P< 0.0001) between all chemical reagents at the mean 2 time intervals for the mean load deflections of nickel titanium arch wires, and there is a significant difference at 60 minutes between all chemical reagents at P< 0.05, and there is a highly significant difference at 90 minutes between all chemical reagents for the mean load deflections of Ni-Ti arch wires at P< 0.0001. Using fluoride containing tooth paste with nickel titanium arch wire could decrease the load deflection; in addition to the fact that there is an inverse relation between the immersion time and the load deflection of nickel titanium arch wire. This may contribute to prolong orthodontic treatment.
Conclusions: The stannous fluoride containing tooth paste seems to be the best fluoride containing tooth paste because it shows no detrimental effect on the load deflection of nickel titanium arch wire. So during the long period orthodontic treatment, both patient and clinical doctor should carefully use the fluoride containing products (teeth pastes, topical prophylactic agents, etc…).
Keyword: Load deflection, nickel titanium wire, Fluoride, Toothpaste. (J Bagh Coll Dentistry 2007; 19(1): 115-121).

Keywords


Article
Mandibular dental arch parameters in Down's Syndrome patients with Class I occlusion. (A comparative study)

Authors: Mustafa M. Al-Khatieeb --- Dheaa H. Abd Awn --- Nidhal H. Ghaib
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2008 Volume: 20 Issue: 1 Pages: 72-77
Publisher: Baghdad University جامعة بغداد

Loading...
Loading...
Abstract

ABSTRACT
Background: The aim of this study was to find out the dental arch form for patients with Down's syndrome and to compare the mandibular dental arch parameters of those patients with the corresponding norms, and to gain a correlation between the maxillary and mandibular arches for the Down's syndrome patients from previous study.
Subjects and methods: A total sample of 50 patients with Down's syndrome was examined with an age ranged from14-18 years. The mandibular dental arch parameters were compared with another group, control, on student of an intermediate school matching with the age and Angle's classification (Class I). Study models for the maxillary and mandibular arches were constructed, and then dental arch measurements were carried out and evaluated.
Results: The mandibular arch parameters for the patients with Down's syndrome showed significantly smaller mean values than the control group for both genders with the males had greater values in inter arch distance and length, with high correlation between the maxillary and mandibular jaws. The wide arch form is the dominated arch form while the flat is the least to appear.
Conclusion: The growth pattern of dental arches in Down's syndrome patients is proportionally reduced when compared with those of norms, with a symmetrical configuration. Hence all arch forms are presented with different distribution.
Keyword: Down's syndrome, Dental arch parameter, Genetic influence. (J Bagh Coll Dentistry 2008; 20(1) 72-77)

Keywords


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

Loading...
Loading...
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.


Article
Sexual Dimorphism of Calvarial Thickness Parameter in Different Skeletal Patterns

Author: Dr.Mustafa M. Al-Khatieeb B,D,S ; M.Sc. د.مصطفى منعم الخطيب
Journal: MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان ISSN: 18138500 Year: 2011 Volume: 8 Issue: 2 Pages: 144-151
Publisher: Al-Mustansyriah University الجامعة المستنصرية

Loading...
Loading...
Abstract

The purpose of the current study was to evaluate the calvarial thickness parameterin both genders, and in different skeletal patterns. The sample included 120pretreatment digital lateral cephalometric radiographs of Iraqi subjects (60 males and60 females) aged between 17 to 30 years, attending Orthodontic Clinic in the Collegeof Dentistry; Baghdad University, and private clinics in Baghdad city. The 120radiographs were divided into 3 groups (40 radiographs for each group) according tothe ANB angles: ANB angle smaller than one degree (Class III), between two andfour degrees (Class I), and larger than four degrees (Class II), each group was furthersubdivided into two subgroups according to gender (20 radiographs for each gender).Four linear measurements were used exclusively in the assessment of calvarialthickness parameter in both genders.The mean calvarial thickness values changed from highest to lowest in sphenoid,parietal, occipital, and frontal bones respectively. In the skeletal class II malocclusionthe frontal and occipital bones' thickness showed highly significant gender differences(P<0.01) using Student's t- test, with females had thicker frontal bone than males, andmales had thicker occipital bone than females, in addition the skeletal glass II groupshowed no significant gender difference (P>0.05) regarding sphenoid and parietalbones' thickness. The most vital outcomes of the present study were the frontal andoccipital bones can be used as important key bones for understanding the calvarialphenotypic description and sexual dimorphism in different skeletal patterns, while thesphenoid and parietal bones can be used as reference bones for standardization ofcephalometric analysis.


Article
Vertical analysis of patients with late lower arch crowding

Loading...
Loading...
Abstract

Background: Because of many factors play a role in the developing of late lower arch crowding, therefore theobjective of the current study is to do vertical analysis for subjects with late lower dental arch crowding. Theconducted study is the first attempt to do vertical analysis for Iraqi subjects with late lower arch crowding to see ifthere is a vertical discrepancy in such patients.Subjects and methods: Eighty subjects were selected according to certain inclusion criteria from patients attendingthe Orthodontic Department in the College of Dentistry, Baghdad University, patients ranged between 18-25 yearsold. The 80 patients were divided into two groups (crowding and normal), 40 patients each (20 males and 20females). A study cast of lower dental arch was obtained, and then Nance's space analysis made for each cast,Cephalometric radiographs were also taken for each patient involved in the current study and digitization was doneto calculate nine vertical linear and twelve angular measurements.Results: Most of linear measurements showed higher mean values in crowding than normal subjects except S-Go, Ar-Go, and PFH/AFH, also subjects with crowding had significantly higher (P<0.05) anterior facial height (ANS-Me) thannormal subjects, and that difference occurred only in the lower part of the face, the Jaraback Ratio (PFH/AFH) wasalso low in crowding subjects, also higher mean values of LADH, UADH and UPDH in crowding group, may be due tocompensatory over eruption of teeth as a result a bite opening occurred, indicating that patients with crowdinghave tendency toward posterior rotation. Regarding the angular measurements, subjects (total males and females)with crowding had larger mean values than normal. There were no interactions between total mean values ofnormal and crowding subjects for any outcome angular parameter, except four of the twelve angularmeasurements (SN-MP, Occ-MP, PP-MP, and sum S.A.G angles) showed an interaction, with females in both normaland crowding groups exhibited higher mean values than males.Conclusions: Subjects with late lower arch crowding can have and/or affect on the vertical dimension, and thevertical discrepancy in late lower arch crowding should be considered during diagnosis and treatment plane oforthodontic cases, active treatment, and retention phase, in order to have stable end result in long term prognosis inorthodontics.

بسبب العوامل الكثیرة التي تلعب دورا في تكون تراكب الاسنان المتأخر للفك السفلي, عملنا ھذه الدراسة لتقیم البعد العمودي للرأس للاشخاص ذوي التراكب السني المتأخر في الفكالسفلي, و تعتبرھذه الدراسةھي الاولى في ھذا المجال للمرضى العراقیین. تتألف عینة البحث من ثمانین شخصا, اختیروا وفق بعض الضوابط من المرضى الذین راجعوا فرع تقویم الأسنان في25 عاما, الاشخاص الثمانون وزعوا الى مجموعتین (الاعتیادیون وذوي الاسنان المتراكبة), كل مجموعة تتألف من اربعین شخصا - كلیة طب الأسنان، جامعة بغداد، تراوحت اعمارھم بین 1820 ذكرا و 20 انثى). القوالب التشخیصیة للفك السفلي صنعت و عمل لھا تحلیل الفراغات السنیة بطریقة نانس, وتم اخذ اشعات قیاسیة للرأس وتم تحلیل تسعة قیاسات خطیة واثنى عشر زاویة. )و , Ar-Go و S-Go وقد تبین من نتئج البحث بأن معظم القیاسات الخطیة كانت اعلى في الاشخاص ذوي التراكب السني للفك السفلي من ما ھو علیھ في الاشخاص الاعتیادیین ما عدا ابعاد,UADH كذلك الاشخاص ذوي التراكب السني المتأخرللفك السفلي لدیھم قیمة معنویة عالیة وملحوظة في بعد الوجھ الامامي وھذا الاختلاف وجد في الجزء السفلي من الوجھ, وان , PFA/AFHاعلى في المجموعة المتراكبة بینما نسبة جاراباك كانت منخفضة, ویمكن ان یعزى ھذا الاختلاف الى زیادة نمو الاسنان العمودي نتیجة العضة المفتوحة مما یدل على ان UPDH و,LADHالاشخاص ذوي التراكب السني للفك السفلي لدیھم میل نحو الدوران الخلفي للفك السفلي, اما فیما یخص القیاسات الزاویة فلم تكن ھناك اختلافات معنویھ ملحوظة بین مجموع متوسطات القیم لأينستنتج من ھذه الدراسة بأنھ یوجد فرق معنوي ملحوظ في قیاسات الوجة العمودیة بین الاشخاص ,(S.A.G و مجموع PP-MP,Occ-MP ,Sn-MP)ٍ معلمة الا في اربع معلمات زاویةالاعتیادیین والاشخاص ذوي تراكب السني المتأخر للفك السفلي, وھذا الفرق یجب ان یأخذ بعین الاعتبارأثناء التشخیص ووضع الخطة العلاجیة للحصول على افضل النتائج التقویمیة المستقرةالطویلة الامد في علاج تقویم الاسنان

Listing 1 - 10 of 13 << page
of 2
>>
Sort by
Narrow your search

Resource type

article (13)


Language

English (13)


Year
From To Submit

2015 (1)

2013 (1)

2012 (2)

2011 (2)

2009 (2)

More...