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Article
Evaluation of the Effect of Implant-numbers, Position and Complete Over Denture on Alveolar Bone Resorption

Authors: Ali M. AlSheakh --- Nadira A Hatim
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2011 Volume: 11 Issue: SpIss Pages: S80-S92
Publisher: Mosul University جامعة الموصل

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Abstract

The aims: The aims of this study were to evaluate the alveolar bone resorption every 2.5mm distal to the implant over denture to the retromolar pad in the mandibular arch, and to the maxillary tuberosity in the maxillary arch in edentulous patient according to number between two and four, and position of implants between canine and 2nd premolar. Materials and Methods: Eight patients (age range 45-60 years) were selected from the department of Prosthodontics/ College of Dentistry/Mosul University, who had at least one edentulous arch. All patients complaining from poorly retention conventional acrylic complete denture due to the residual ridge resoption, but the alveolar ridge height need at least 10mm implant length.After completing the surgical steps of 26 implants (two or four implant screw type titanium), over denture type with one step surgery for all implant types were constructed in conventional method after one month healing period. The prosthesis was delivered to the patients after one months of making the period elapsed. Dentures were delivered without socket attachment(six months). For assessment of alveolar bone height, for each patient panoramic exposure of OPG was recorded – three times [base line(at time of placement) , 6 months and 12 months]. Results: Results of this study showed, that mean difference of bone resoption range between [-0.2 –(-0.6)mm], and there was a significant difference of bone resoption between base line and 12 months to p0.05 according to number and position of implants. Conclusions: The conclusion of this study showed that, there was no significant different of alveolar ridge bone resoption between implants number in two or four implants over denture or implant position


Article
Sinus floor elevation procedure with immediate implant placement using artificial bone substitutes: a prospective clinical study
إجراء رفع الجيوب الأنفية للأرضية مع وضع الزرع الفوري باستخدام بدائل العظام الصناعية: دراسة سريرية مستقبلية

Author: Omed I. Shihab
Journal: Zanco Journal of Medical Sciences مجلة زانكو للعلوم الطبية ISSN: 19955588/19955596 Year: 2011 Volume: 15 Issue: 1 Pages: 66-73
Publisher: Hawler Medical Univeristy جامعة هولير الطبية

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Abstract

Background and objectives: This study was designed to evaluate the clinical status of implants placed immediately in lifted maxillary sinus using Resorbable Tissue Replacement (R.T.R.) cone bone substitutes.Methods: Twenty implants were placed in twenty patients in the period between Jan. 2006 and Sept. 2010. Lateral approach, open window method for sinus lift with placement of Resorbable Tissue Replacement Cone bone substitutes were carried out. A 4-6 mm of the bone level was required in the alveolar ridge for primary stability, with sufficient inter-arch space for the prosthesis. All implants were placed in upper molar region simultaneously with sinus lift procedure in conjunction with Tissue Replacement Cone bone substitutes. The implant survival was defined when the prosthesis had been delivered and followed for two years without infection, pain, and mobility after loading.Results: Twenty patients, 13 males and 7 females, with an average age of 41 years old were participated in this study. A total of twenty implants were followed up for two years. Eighteen patients with eighteen implants (90.0%) showed no signs of sinusitis or other complications and the peri-implant health judged to be good with a peri-implant sulcus depth of 2-3mm. Two implants (10%) showed mobility before loading.Conclusion: A good survival rate was observed in implants placed immediately in lifted maxillary sinus using Resorbable Tissue Replacement (R.T.R.) cone bone substitutes.


Article
Evaluation of osseointegration using partially stabilized zirconia coated implants by electrophoretic deposition &dipping methods

Authors: Athraa Y.Al-Hijazi عذراء يحيى الحجازي --- Thair L.AL-Zubaydi ثائر الزبيدي --- Ban A. Al-Ghani بان الغاني
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2011 Volume: 23 Issue: special issue Pages: 42-46
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: Partially stabilized Zirconia(PSZ)coated implant demonstrated the distinct effects on the surfacecomposition of the implant, and activates on osteoblasts. Zirconia improves cell proliferation significantly during thefirst days of implantation, and may improve attachment and adhesion strength of the implant. The aim of the studywas to evaluate the influence of the coated biomaterial (zirconium) on osseointegration of cpTi implantradiographically with mechanical test.Materials and Methods: Seventy-two commercially pure titanium implants(cpTi)were used in this study,(24)implantswere coated with PSZ by electrophoretic deposition(EPD)method,&(24) by dipping method, the rest24 implants wereused as controls, they were inserted in the tibia of (32)New Zealand white rabbits & were followed for 2,&6weeks.Mechanical torque removal test for evaluation of osseointegration was performed,Results: Results revealed that bone –implant contact (BIC), increased with time &that implants coated with PSZ bydipping method have shown higher torque mean values than those coated by EPD method.Conclusion: Dip-coating of the cpTi implants with PSZ, can be considered as an alternative coating method andenhance better bone implant contact than EPD.


Article
In vivo immunohistochemical investegation of bone deposition at collagen coated Ti implant surface

Authors: Ban A. Al-Ghani بان الغاني --- Athraa Y.Al-Hijazi عذراء يحيى الحجازي --- Thair L.AL-Zubaydi Thair L.AL-Zubaydi
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2011 Volume: 23 Issue: special issue Pages: 47-52
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: Dental implants provide a unique treatment modality for the replacement of lost dentition. Functionalsurface modifications by organic material such as collagen coating seem to enhance early peri-implant boneformation, enhancing the initial cell attachment. The aim of the study was to study the expression of osteocalcin andgrowth hormone receptor as bone formation markers in collagen coated and uncoated implant in intervalperiods(2,and 6 weeks).Materials and Methods: Commercially pure Titanium(cpTi) implants, coated with collagen protein, were placed inthe tibias of 32 New Zealand white rabbits, immunohistochemical tests for detection of expression of osteocalcin andgrowth hormone receptor were performed on all the implants of both control and experimental groups for (2, and 6weeks) healing intervals. Mechanical test (torque removal test) was performed as an indicator for the presence ofosseointegration and as a test for the mechanical property of bone-implant interface, because the torsion appearsto be primarily probing the interface mechanics.Results: Removal torque mean values in all studied groups (uncoated and coated with collagen at two and sixhealing intervals were increasing with advancing time (higher at 6 than 2 weeks periods). And coated implantshowed high value in comparison to control. Results have shown that positive reaction for OC&GHR was expressedby osteoblast cells (OB)at implants coated with collagen ,indicating that bone formation &maturation wasaccelerated by adding biological materials as a modification modality of implant surface..Conclusion: Immunohistochemical findings revealed high positive expression range from strong to moderate ofosteocalcin and GHR in coated implant in comparison to uncoated specialy in early periods.


Article
In vivo study of the effect of collagen protein coated implant as compared with implants coated with a mixture of partially stabilized zirconia and collagen on osseointegration

Authors: Thair L .AL-Zubaydi ثائر الزبيدي --- Athraa Y. Al-Hijazi عذراء يحيى الحجازي --- Ban A. Al-Ghani بان الغاني
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2011 Volume: 23 Issue: special issue Pages: 108-116
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: Biocompatibility of orthopaedic surgical implants with bone tissue allows adequate osseointegrationbetween the bone and implant. To achieve this, implants are coated with biocompatible materials Commerciallypure titanium is widely used as dental implant material because of its suitable mechanical properties and excellentbiocompatibility,and to enhance osseointegration of the implant,organic and inorganic materials are used as abioinert coating material.Aim of the study: Comparison of the influence of the implant coated by biological material(collagen),and implantcoated by both bioinert ceramic(zirconia) and( collagen), on osseointegration by immunohistochemical , andradiographical studies with mechanical test.Materials and Methods: Commercially pure Titanium(cpTi) implants, coated with PSZ powder by electrophoreticdeposition (EPD) method, collagen protein, and mixture of collagen and partially stabilized zirconia(PSZ) wereplaced in the tibias of( 12 )New Zealand white rabbits, immunohistochemical tests for detection of expression ofosteocalcin and growth hormone receptor were performed on all the implants of both control and experimentalgroups for(3days,1, 2and6weeks) healing intervals.Mechanical test (torque removal test) was performed as anindicator for the presence of osseointegration and as a test for the mechanical property of bone-implant interface.Results: have illustrated that removal torque mean values, in all studied groups (uncoated and coated with both PSZand collagen at (2&6weeks) healing intervals were increasing with advancing time (higher at 6 than otherperiods),also results have shown that positive reaction for osteocalcin(OC)& growth hormone receptoe(GHR) wasexpressed by osteoblast cells(OB)at implants coated with collagen and implants coated with zirconia andcollagen,indicating that bone formation &maturation was accelerated by adding biological materials as amodification modality of implant surface..Conclusion: It is concluded that coating of implant with collagen and coating with both PSZand collagen showed anincrement in osseointegration in short interval period.


Article
CT Scan Value Of Temporal Bone In Assessment Of Congenital Deafness
أهمية المفراس الحلزوني للعظم الصدغي في تقييمِ الصمم الولادي

Authors: Haidar A. ghayad حيدر عبدالامير غياض --- Hani M. Badr --- Mohammed AL- Hilli
Journal: Journal of the Faculty of Medicine مجلة كلية الطب ISSN: 00419419 Year: 2011 Volume: 53 Issue: 4 Pages: 367-370
Publisher: Baghdad University جامعة بغداد

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Abstract

Background:. Computed tomography (CT) of the temporal bone is the first-line recommended imaging modality for SNHL. Because it can identify inner ear malformations that may be responsible for hearing impairment.Objectives: To demonstrate CT abnormalities encountered in children with congenital deafness and to assess the value of CT in the prediction for cochlear implantation. Also to evaluate the incidence and types of inner ear abnormalities in children with congenital deafness identified with CT scan for implantation difficulties. Patients & Methods: This is a cross sectional study carried out during the period from October 2009 to October 2010 at Baghdad medical city complex on children patients who are suffering from congenital deafness. The study included 60 patients (120 ears), 27 males and 33 females, were evaluated by CT scan of temporal bone before cochlear implants.Results: Most of the cases undergo CT scan examination were normal (80%). Enlargement of the vestibular aqueduct is most common (10% ) causes of congenital inner ear malformations, followed by cochlear malformation (8.3%) while dysplasia of lateral semicircular canal found in (3.3%) of cases. Conclusion: High resolution CT scan is recommended in all patient for pre implant analysis of temporal bone morphology due to its reliability and easy availability. CT scan is the modality provided critical information on abnormalities of the otic capsule, pneumatisation of the mastoid, middle ear abnormalities, cochlear ducts patency and vascular abnormalities- thus helping to assess the suitability of the ear for implantation, determine the side to be implanted and to find any associated abnormality which could adversely influence the surgery or post operative period.

المقدمة :يعتبر المفراس الحلزوني الطريقة الاولى لفحص المرضى الذين يعانون من الصمم الولادي لاستطاعته التعرف على التشوهات الخلقية للاذن الداخلية التي من الممكن ان تكون مسؤولة عن الصمم الولادي. الهدف:لعَرْض حالاتِ شذوذ الأذن الداخلية الموضَحة في المفراس الحلزوني في الأطفالِ المصابين بالصمم الخلقي ولتَقييم اهمية المفراس الحلزوني للتنبؤِ بزرعِ القوقعة.وكذلك لتَقييم مدى حدوث وانواعِ حالاتِ شذوذ الأذنِ الداخليةِ في الأطفالِ المصابين بالصمم الخلقي التي مٌيزت بالمفراس الحلزوني التي تؤدي الى صعوبات في زرع القوقعة. المرضى وطريقة العمل : هذه دراسة عشوائية اجريت في مستشفيات مدينة الطب التعليمية للفترة من شهر تشرين الاول سنة 2009 ولغاية شهر تشرين الاول سنة 2010, تَضمّنتْ الدراسةُ 60 مريضُ (120) أذن ، 27 ذكر و33 أنثى، العُمر المتوسط كَانَ 4.5 سنةَ مَع مدى مِنْ 2 إلى 7 سَنَواتِ، بحادثةِ العُمرِ البالغة الذروةِ مِنْ 5 سَنَةِ. كل المرضى فحصوا و قيموا بواسطة المفراس الحلزوني للعظم الصدغي. اشتملت البيانات التي حللت في الدراسة على العمر والجنس ومحاولة معرفة اسباب الصمم الولادي ونتائج المفراس الحلزوني وتمت مقارنة البيانات مع دراسات اخرى مشابه.النتائج: كانت اكثر الحالات طبيعية بنسبة 80% ولا توجد فيها تشوهات. توسيع القناةِ الدهليزيةِ كانت الأكثر شيوعاً(10%)، تَليها في النسبة عاهاتِ القوقعة(8,3%), بينما تشوه القنوات شبه الدائرية كانت (3.3%) الاستنتاجات: يُعتَبرُ المفراس الحلزوني الإختيارِ الافضل للتصوير الدقيقِ في المتاهةِ العظميةِ للمرضى المصابين بالصمم الولادي.زوّدَ جهاز المفراس الحلزوني بمعلومات هامة عن حالاتِ شذوذ الكبسولةِ الأذنيةِ ,وحالات شذوذ الأذن الخارجية والوسطى ,و إنفتاح قنواتِ القوقعة وحالاتِ شذوذ وعائيةِ وهكذا يساعد المفراس لتَقييم ملائمةِ الأذنِ للزرعِ، ويُقرّرُ الجانبَ الذي تزرع فيه القوقعة ولإيجاد أيّ شذوذ مرتبط والذي يُمْكِنُ أَنْ يُؤثّرَ على الجراحةِ عكسياً أَو فترةِ ما بعد الجراحةِ.

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