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Article
Dimensional accuracy of impression techniques for the endosteal implants (An in vivo study): Part II

Authors: Nadira A Hatim --- Basim M Al–Mashaiky
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2007 Volume: 7 Issue: 2 Pages: 131-137
Publisher: Mosul University جامعة الموصل

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Abstract

Aims: To determine the most accurate impression techniques and materials to transfer the exactposition of a single implant to stone die to construct the prosthesis for selected clinical cases. Materialsand methods: Five clinical cases were selected with special criteria to construct implant (Frialit–2)prosthesis on a stone die with high accuracy according to the results of study. Four impressiontechniques were used (direct and indirect, each with one and two steps) using condensation, addition(heavy, medium and light consistencies) silicone impression materials. Ten impressions were taken foreach patient to produce a total number of 50 stone casts. The direct and indirect measurements wereperformed by using digital vernier. Results: The significant differences between the impressiontechniques at the three axes of dimensions (p ≤0.05) were applied clinically to construct the fixedprosthesis for each patient. The results of this study showed that the high dimensional change oflaboratory cast was related to indirect one step impression technique to transform the implant positionfrom patient mouth to laboratory cast. Addition curing (medium consistency) silicone impressionmaterial produced the lowest accurate stone die. Conclusions: The results of this study showed that thedirect two steps impression technique was the accurate impression technique for transformation ofimplant position from patient mouth to laboratory cast. Additional curing (light and heavy consistency)silicone impression material produced the most accurate stone die and gave a successful treatment tothe patient.


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: 3 Pages: 80-92
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
In Vitro and In Vivo Tests of the Cidal Effects of Certain Agents for Hydatid Protoscolices

Author: Dhilal Mahdi Al-Muathen
Journal: Al-Nahrain Journal of Science مجلة النهرين للعلوم ISSN: (print)26635453,(online)26635461 Year: 2016 Volume: 19 Issue: 4 Pages: 139-142
Publisher: Al-Nahrain University جامعة النهرين

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Abstract

Cysts from the liver of hydatidosis infected sheep were obtained from a local abattoir, live protoscolices were prepared by using of Kreb's Ringer solution plus Hydatid Cyst Fluid (4:1) and exposed to selected protoscolicidal agents (Mebendazole 5%, Cetrimide 0.15%, and Formaline 2%) in vitro, survival times of protoscolices in the presence of chemicals was used as a criterion of protoscolicidal agents activity by using eosin stain. After treatment it was concluded that all the treated protoscolices of the study were completely killed with Mebendazole 5% and Cetrimide 0.15% at 5 minutes of exposure, while Formaline 2% did not cause complete killing even at 15 min of exposure. furthermore the results of in vivo part of this study showed that all the treated scolices in vitro part were completely killed and did not cause hydatidosis up to 90 days post infection in laboratory albino mice.

جمعت الرؤيسات الأولية للأكياس العدرية من الخ ا رفالمصابين بطفيلي المشوكة الحبيبية Echinococcus granulosus من المجازر المحلية. و حضرت في الزجاجبأستخدام وسط محلول كريبس رينكر + سائل الكيس العدري4:1 ( لغرض معاملتها بمواد قاتلة للرؤيسات الأولية هي ()الميبيندازول 5%, السترمايد 5145 %, الفورمالين 2%(. وقد أستخدم وقت البقاء للرؤيسات الأولية بوجود الموادالكيميائية المستخدمة كوسيلة لمعرفة فعالية هذه الموادبأستخدام صبغة الأيوسين. و قد أستنتج في هذه الد ا رسة أنكل من الميبندازول 5% و السسترمايد 5145 % هو مادةقاتلة جيدة للرؤيسات الأولية خلال فترة تعرض 5 دقائق,أضافة الى ذلك فأن الفورمالين 2% قد سبب قتل كاملللرؤيسات الأولية في 41 دقيقة. كما و أظهرت الد ا رسة داخلالجسم الحي ان كل الرؤيسات المعاملة بالمواد القاتلة لهاالمستعملة في الجزء المختبري قد قتلت بصورة كاملة و لمتسبب أحداث أصابة بالأكياس المائية حتى بعد تسعين يوممن أحداث الأصابة في الفئ ا رن المختبرية.

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