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Article
The Measurement of Surface Hardness of Mineral Trioxide Aggregate Material (MTA) using Two Techniques of Condensation.

Author: Maha A. Al.Murad
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2008 Volume: 8 Issue: 12 Pages: 266-269
Publisher: Mosul University جامعة الموصل

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Abstract

Aims: This in vitro study was conducted to exam the effect of condensation technique on surface hardness of MTA. Materials and Methods: In this study, 20 acrylic blocks were used. In each block a cubic shape cavity 4 mm in width and 4 mm in depth was prepared. The first group which involve ten samples were filled with MTA using hand condensation method. The other ten samples were filled with MTA using hand method followed by ultrasonic activation for one second after each increment.All sample after setting were prepare for Vickers Hardness Test. The first group subjected to a loadstarted from 0.5 Kg and show fatigue at 1 kg using the Vickers Hardness Machine. The second groupsubjected to a load started from 0.5 Kg and increased the load until showed fatigue of the material at 3 Kg using the Vickers Hardness Machine. All the samples were examined using stereo microscope themagnification power about 200x to perform hardness number. Results: Samples condensed with hand method followed by ultrasonic condensation showed more surface hardness than samples condensed with hand method only. There was highly significant difference between samples. Conclusions: Because OF use MTA as pulp capping is import to use Ultrasonic condensation for placement of MTA.

Keywords

Surface hardness --- condensation --- MTA


Article
Evaluation of calcium and hydroxyl ions release from nonsetting calcium hydroxide paste and mineral trioxide aggregate during apexification procedure

Authors: Sarah T. Abdul Qader سارة عبد القادر --- Zainab A.A. Al-Dahan زينب الدهان
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2012 Volume: 24 Issue: special issue 2 Pages: 156-160
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: Several materials had been used as intracanal dressing to stimulate hard tissue formations duringapexification procedure. Recently, a single appointment technique by using mineral trioxide aggregate (MTA) hasbeen proposed as an alternative to the multiappointment calcium hydroxide apexification. The aim of this study wasto evaluate the release of calcium and hydroxyl ions from calcium hydroxide paste and MTA through three differentapical aperture sizes during pexification procedure.Materials and Methods: The root canals of sixty extracted premolar teeth were instrumented to a master apical fileNo. 100, 120, and 140 and filled with either calcium hydroxide paste or MTA. Calcium ions concentrations and pHvalues of the surrounding media were measured at days 1, 3, 7, 14, 21, and 28 of the test period.Results: Calcium ions concentrations and pH values of Ca(OH)2 were more than that of MTA at days 1, 3, and 7,then the calcium ions concentrations of MTA increased with time and became more than that of Ca(OH)2 whichdecreased with time. Ca+2 and OH-1 release from Ca (OH)2 paste and MTA increased with larger apical aperture sizeat all time intervals.Conclusions: MTA maintains a continuous calcium and hydroxyl ions release for longer time than that of Ca (OH)2paste


Article
Apical and Coronal Microleakage using Mineral Trioxide Aggregate (Comparative Study)

Author: Dr. Jamal Aziz Mahdi B.D.S. M.Sc. د.جمال عزيز مهدي
Journal: MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان ISSN: 18138500 Year: 2006 Volume: 3 Issue: 1 Pages: 18-23
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

The purpose of this study was to evaluate the potential of using mineral trioxide aggregate (MTA) as a root canal filling material by comparing its apical sealing ability with that of laterally condensed gutta-percha with sealer in extracted one canal teeth. In addition, this study was evaluating the MTA and ZnPo4 cement as barriers to coronal microleakage.Forty single canal extracted teeth, were prepared in a standard manner using GT file, randomly divided into two groups of 20 teeth, and obturated with laterally condensed gutta-percha or MTA.In each group, 10 teeth received a 4-mm barrier of MTA or ZnPo4 cement. The sealing ability of each part was assessed by immersion in 1% methylene blue dye for 72 h. The leakage was recorded in apical and coronal part. Data were analyzed by One-Way ANOVA test, T-test, and LSD test.Canal filled with laterally condensed gutta-percha showed significantly less apical dye penetration than canals obturated with MTA. However, coronal barrier filled with MTA showed significantly less dye penetration than ZnPo4 cement barrier.


Article
The effect of blood contamination on compressive strength of two materials used in treatment of furcation perforation (A comparative study)

Author: Linz A. Shalan لنز شالان
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2012 Volume: 24 Issue: 4 Pages: 25-28
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: blood contamination of the materials used for treatment of furcation perforation can affect on theirphysical properties (such as compressive strength). The aim of this study was to compare the effect of bloodcontamination on compressive strength for Mineral Trioxide Aggregate MTA and Resin Modified Glass IonomerCement RMGIC during furcation perforation management.Materials and methods: Forty plastic molds (4 mm diameter and 2mm thickness) were constructed to form samples.Ten samples were made for each group: MTA-without blood contamination GI, MTA- with blood contamination GII,RMGI- without blood contamination GIII and RMGI- with blood contamination GIV, and kept in plastic tubes withmoist cotton pellet at 37 oC for 4 days then all samples were subjected to compressive strength test by Instron testingmachine. Data were subjected to statistical analysis using descriptive analysis, ANOVA and t- test.Results: statistical analysis of the results showed that there was a highly significant differences in compressive strengthbetween GI and GII ( P< 0.01)and significant differences between GIII and GIV, GIII and GI, GIV and GII (P < 0.05),With lowest mean of compressive strength value was recorded to MTA- with blood contamination GII (31.32 ± 0.022Mpa) and highest mean for RMGI- without blood contamination GIII ( 168.725± 0.063Mpa).Conclusion: compressive strength value for both MTA and RMGI cement reduced when exposed to blood duringtreatment of furcation perforation, RMGI cement has higher value of compressive strength than MTA and it could besuitable choice in treatment of Furcal perforation in presence of bleeding and placing of coronal restoration after 4days.


Article
An in-vitro scan electron microscope comparative study of dentine-Biodentine interface

Authors: Jameel M. A. Sulaiman جميل سليمان --- Maha M. Yahya مها يحيى --- Wiaam M.O. Al-Ashou
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2014 Volume: 26 Issue: 1 Pages: 42-48
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: This research was an in-vitro SEM comparative study of Dentine – Biodentine TM interface.Materials and Methods: Sixty three freshly extracted human molars, Biodentine TM (Septodont, France), MTA (ProRoot, Tulsa, Brazil), GIC (MediFil, Promedica, Germany), light microscope, scaler and pumice, high speed hand piece, diamond bur, Scan Electron Microscope: VEGA\ Easy Probe. TESCAN – Germany. The study was performed first at the University of Mosul, College of Dentistry to dental models were brought the sixty-three of the specialty dental health center in Mosul. The teeth was prepared by cleaning, cutting, and removing all the caries and examined under light microscope and decayed teeth was excluded .Then the teeth was divided randomly into three main groups (A, B, C) and each major group was divided into three sub groups: (A1, A2, A3) was filled with (Biodentine TM), (B1, B2, B3) was filled with (MTA) and (C1, C2, C3) was filled with the (GIC). Each subset contains seven (7) samples. All groups were filled according to the manufacturer instructions, and then restored at 37°C and 100% humidity. After storage periods of (7, 14, 28) days, the teeth were sectioned mesio-distaly using a low speed diamond saw (Isomet, Buehler Ltd.), and examined under SEM at the University of Technology-Nano Research Center in Baghdad.Results: Under the condition of this in vitro study, examination with SEM showed that the marginal gaps between the experimental materials and the dentine is time dependant, with the best results was observed between Biodentine and dentine interface.Conclusion: The marginal gaps between the experimental materials and the dentine are time dependent

الأهداف : يهدف البحث إلى استخدام تقنية المجهر الاليكتروني لإجراء دراسة مقارنة للوسط البينيلمادةعاج السن الطبيعي مع المادة الصناعية المثيلة لها. المواد وطرائق العمل: ثلاثةوستون ) 36 ( عينة من الأسنان الطبيعية ، ثلاثة مواد مختلفة من الحشوات السنية ال )TM (Biodentine ، ومادتي ال (MTA) وال (GIC) ، المجهر الاليكتروني الماسح (SEM: VEGA\ Easy Probe. TESCAN - Germany) ، مجهر ضوئي ، مقحلة أسنان (Scaler) ومسحوق (Pumice) لمعالجة الأسنان، رأس قاطع من الماس، بالإضافةإلى أدواتيدوية عالية السرعة، جهاز تجفيف من الرطوبة. أجريت الدراسة أولا في جامعة الموصل كلية طب الأسنان بعد أن تم جلب نماذج الأسنان الثلاثة والستون من المركز الصحيالتخصصي للأسنان في الموصلثم بدأ العمل لتحضير العينات للعمل البحثي لتشمل التنظيف والقص وإزالة جميع التسوسات وفحصها بالمجهر الضوئي لغرض التخلص من الأسنانالمنخورة . قسمتالأسنان عشوائيا إلى ثلاثة مجاميع رئيسية وهي )(A, B, C والمجموعة الرئيسية الواحدةإلى ثلاثة مجاميع ثانوية )3,A2,A1(A لمادة ال )TM (Biodentine ،)3,B2,B1(B لمادة ال (MTA) و )3,C2,C1(C لمادة ال (GIC) . وكل مجموعة ثانوية تحتوي على سبعة (7) عينات. ثم بدأت المعالجة بالحشوات السنية المخصصة لهذه الدراسةوهي مادة ال )TM (Biodentine فرنسي الصنع من شركة (Septodont) ، ومادة ال (MTA) برازيلي من شركة Tulsa) (ProRoot, اما مادة ال (GIC) ألماني من شركة –(MediFil, Promedica) ، بعدها بدأت عميلة الخزن بالماء المقطر ولفترات زمنية مختلفة بالأيام وهي ) 7, 14, 28 ( لكل مجموعة ، ثم جففت جميع العينات بجهاز تجفيف للتخلصمن الرطوبة وتم تقطيعها ثم بعدها أرسلت للتصوير بجهاز المجهر الاليكتروني الماسح (SEM) في الجامعة التكنولوجية مركز بحوث النانوتكنولوجي في بغداد. –النتائج:أظهرت نتائج هذه الدراسة أن مقدار الفجوة الحاصلة بين عاج السن والمواد المفحوصة تعتمد على الزمن وان أفضل النتائج لوحظت بين مادة ال )TM (Biodentine وسطحعاج السن.الاستنتاجات: إن مقدار الفجوة السطحية بين المواد المفحوصة وسطح عاج الأسنان مرتبط بعامل الزمن.

Keywords

Interface --- Biodentine TM --- MTA --- SEM


Article
Evaluation of mineral trioxide aggregate MTA as traumatic pulp capping material (An In vitro study)

Author: Neam N. AlYousifany
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2011 Volume: 11 Issue: SpIss Pages: S323-S329
Publisher: Mosul University جامعة الموصل

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Abstract

Aims of the Study: The purpose of this clinical study was to evaluate the effectiveness of mineral trioxide aggregate MTA as direct pulp capping material in permanent teeth with traumatic exposure. Materials And Methods: twenty four permanent teeth for healthy patients ages between 15-40 accepted direct pulp capping treatment after accidental traumatic exposure during cavity preparation done by graduate students, in Conservative Department , College of Dentistry, University of Mosul. The teeth were treated directly with MTA material over the exposure site then based with Glass Ionomer cement and restored with permanent restoration . clinical , and radiographic examinations were carried out after 1 week then follow up after 6,10,12,24 weeks. Results: six month clinical &radiographic follow up were carried out for all patients . At recall appointments, patients were evaluated for reparative dentin formation, pulpal calcification, continued normal root development and evidence of pathosis. One patient did not return for recall appointments and evaluations after one week , another one failed to return after six weeks interval . The remaining had favorable outcomes on the basis of clinical finding , electrical pulp tester & radiographic appearance . Conclusion : within the limitation period of the present study , MTA can be considered as a reliable pulp capping material for manangment direct pulp exposure in permanent teeth


Article
The effect of various endodontic irrigants on the sealing ability of Biodentine and other root perforation repair materials (In vitro study)

Authors: Ahmed K. Al-Zubaidi احمد الزبيدي --- Abdul Karim J. Al-Azzawi عبد الكريم جاسم العزاوي
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2014 Volume: 26 Issue: 3 Pages: 1-8
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: This in vitro study was carried out to evaluate the effect of various endodontic irrigants (sodiumhypochlorite, ethylene diaminetetracetic acid and normal saline) on sealing ability of (Biodentine, mineral trioxideaggregate, and amalgam) used to repair furcal perforations.Material and methods: One hundred and twenty extracted human molars with divergent roots were used in thisstudy. A standard root canal access cavity was prepared in each tooth and furcal perforation was made and wasstandardized by using k file size 100 instrument to get a perforation of (1.32mm) in diameter .The teeth were randomlydivided in to three groups of 40 teeth according to the type of material used to repair the perforations (Group A: Thefurcal perforations were repaired with Biodentine, Group B: The furcal perforations were repaired with MTA ,GroupC: The furcal perforations were repaired with Amalgam). Each group was then subdivided into 4 subgroupsaccording to irrigation regimens applied over the repair site (Subgroup 1: without irrigation, Subgroup 2: the pulpchamber was gently irrigated with 10 mL 5.25% Sodium hypochlorite for 10 minutes, Subgroup 3: Pulp chamber wasgently irrigated with 10 mL 17% Ethylene Diaminetetracetic acid for 10 minutes, Subgroup 4: pulp chamber wasgently irrigated with 10 mL normal saline for 10 minutes. Each tooth was coated with two layers of nail varnish andthen sticky wax except 1 to 2 mm around the perforation site. Each tooth was placed in glass vial containing 3 ml ofbuffered Methylene blue dye at (37°C, pH 7) and kept in an incubator for 72 hour at 100% humidity. After dyeapplication, the teeth were washed in running water for 5 min. Each tooth was sectioned longitudinally in abuccolingual direction.Results: The results showed that group A has least mean of dye penetration and the difference was highly significantwith group C and non-significant with group B.Saline and NaOCl increase the sealing of all groups while EDTAsignificantly increased the dye penetration of Biodentine and MTA respectively.Conclusions: Biodentine has the best sealing ability of the tested materials while amalgam showed the highest dyepenetration of all tested materials. Saline and NaOCl increase the sealing ability of Biodentine and MTA where asEDTA decreased the sealing efficacy of MTA and Biodentine

الھدف من ھذه الدراسة كان لتقییم تأثیر مواد مختلفة لغسل قنوات الجذور (محلول الاثیلین دایمین تیترا استك اسد , محلول الھایبوكلوراید و المحلول الملحي العادي ) على قدرة الختملمواد (البایودنتین , مادة تجمع المعدن ثلاثي الاوكسد و الاملكم ) المستعملة في ترمیم ثقب مفترق الجذور .استخدمت في ھذه الدراسة مئة و عشرون ضرس سفلیة حدیثة القلع , متباعدة الجذور .تم تحضیر قناه الجذر القیاسیة لكل سن ثم عمل انثقاب لمفترق الجذر و تم معایرتة بحیث یصبحمقیاس 100 , قسمت الاضراس عشوائیا الى ثلات مجموعات تحوي على اربعین رحى استنادا لنوع المادة المستعملة في ترمیم انثقاب k بقطر ( 1,32 ملم ) بواسطة استخدام مبردمفترق الجذر كالاتي :مجموعة أ : رممت انثقابات الجذور بمادة البایودنتین .مجموعة ب : رممت انثقابات الجذور بمادة تجمع المعدن ثلاثي الاوكسد .مجموعة ج : رممت انثقابات الجذور بمادة الاملغمثم تم تقسیم كل مجموعة إلى 4 مجموعات فرعیة وفقا لنظم الري التي تم تطبیقھا على موقع إصلاح مفترق الجذور على النحو التالي:المجموعة الفرعیة الاولى : لم یجري أي ري .المجموعة الفرعیة الثانیة : تم ري غرفة اللب بلطف مع 10 مل من محلول الھایبوكلوراید 5.25 ٪ لمدة 10 دقائق .المجموعة الفرعیة الثالثة :تم ري غرفة اللب ب 10 مل من محلول الاثیلین دایمین تیترا استك اسد لمدة 10 دقائقالمجموعة الفرعیة الرابعة : تم ري غرفة اللب ب 10 مل من محلول الملحي المتعادل لمدة 10 دقائق2 ملم - تركت جمیع الأسنان لتجف لمدة 24 ساعة ثم ملئت الاسنان بالحشوة المؤقتة. كل سن تم تغطیتھ بواسطة طبقتین من مادة طلاء الاظافر تلیھا طبقة من الشمع اللاصق باستثناء 1حول موقع انثقاب مفترق الجذور .وضع كل سن في قارورة زجاجیة تحتوي على 3 مل من صبغة المیثیلین الزرقاء مخزنة في ( 37 درجة مئویة، ودرجة الحموضة 7 ) و حفظ في حاضنة لمدة 72 ساعة وبعد تطبیقالصبغة، تم غسل الأسنان في المیاه الجاریة لمدة 5 دقائق . تم قطع كل رحى طولیا على طول المحور الطولي في الاتجاه الدھلیزي اللساني من خلال الانثقاب باستخدام القرصالماسي . اظھرت النتائج ان المجموعة الاولى المرممة بمادة البایودنتین كان لھا القیمة الوسطیة النسبیة الاوطا لاختراق الصبغة و كان الاختلاف ذو فرق معنوي احصائي عال جدا معالمجموعة الثالثة المرممة بواسطة مادة الاملكم و كان الفرق بین المجموعة الاولى و الثانیة المرممة بمادة تجمع المعدن ثلاثي الاوكسد غیر معنوي .كما اظھرت النتائج ان المحلول الملحي العادي و و محلول الھایبوكلورایت یزید قابلیة الختم جمیع المجموعات في حین محلول محلول الاثیلین دایمین تیترا استل اسد سبب في زیادةكبیرة في اختراق الصبغة من البایودنتین و مادة و تجمع المعدن ثلاثي الاوكسد على التوالي.

Keywords

Biodentine --- MTA --- EDTA --- NaOCl --- root perforations


Article
Sealing Ability of Biodentine as a Retrograde Filling Materials (A Comparative in vitro study)

Authors: Makdad N. Chakmakchi --- Maha M. Yahya --- Wiaam M.O. AL-Ashou
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2015 Volume: 15 Issue: 26 Pages: 357-361
Publisher: Mosul University جامعة الموصل

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Abstract

Aim: Inadequate apical seal is the major cause of endodontic failure, the root end filling material used should prevent ingress of potential contaminants from periapical tissue. Aims: The purpose of this in vitro study was to evaluate the sealing ability of Biodentine (Septodent) when used as a root-end filling material and to compared the result with that of White Mineral Trioxide Aggregate ( MTA) and Glass Ionomer Cement (GIC). Materials and Methods: The root canals of (34) extracted human teeth were instrumented and obturated with gatta percha. Apexes were resected and cavities were prepared to 3mm depth. Teeth were divided randomly into three groups(n=10): first group was retrofilled with Biodentine, second with MTA, third group with GIC, and positive (n=2) and negative (n=2) control groups. Nail varnish was applied to all root surfaces except the tip of the root. Following immersion in basic fuchsine 1% , the roots were sectioned longitudinally and depth of dye penetration was evaluated by stereomicro-scope at 40X magnification. Data were analyzed using one way ANOVA and Duncan›s multiple range test at P< 0.05. Results: In this study, biodentine was determined to be superior than MTA and GIC prevention apical microleakage when used as root-end filling. No statistical significant difference was observed between MTA and GIC. Conclusions: under the conditions of this in vitro study, despite some variation, Biodentine provides a better seal than MTA and GIC when used as retro filling, but along term in vivo study is required to prove it


Article
Sealing ability of a retrograde filling materials using Amalgam, MTA, or Zinc Phosphate cement

Authors: DR. Haraa Khairi AL – Hadithi.* د.حراء خيري --- DR. Maha J. AL- Anni.* د.مها جمال --- DR. Maha Adul- kareem AL- Mashhadaney.* د.مها عبد الكريم
Journal: MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان ISSN: 18138500 Year: 2009 Volume: 6 Issue: 3 Pages: 213-217
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

AbstractThis study evaluated the ability of mineral trioxide aggregate (MTA) to seal the root end effectively by comparing its apical sealing ability with that of amalgam and zinc phosphate cement. Forty five, single rooted extracted human teeth were used in this study, teeth divided randomly into three groups. After root–end resection of teeth, 3 mm depth of retrograde class I cavities were performed in 3 groups. Retrofillings of each group were performed with Amalgam, MTA and Zinc Phosphate cement. Following immersion in 1% Methylene blue dye for 42 hours, the roots were sectioned and the depth of dye penetration was evaluated by a stereomicroscope at X-10 magnification. The sealing ability of the retrograde filling materials was determined by their ability to inhibit dye penetration. Data were analyzed by one way ANOVA test and t-test. MTA provides a better seal than Amalgam and Zinc Phosphate cement when used as retrograde filling.


Article
Repair of root canal perforation by different materials

Author: Samar Abdul Hamed سمر عبد الحميد
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2011 Volume: 23 Issue: special issue Pages: 30-35
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: The aim of this in vitro study was to compare sealing ability of Mineral Trioxide Aggregate (MTA), Glassionomer cement (GIC) and Epiphany obturation system in repairing the iatrogenic lateral root canal perforation.Materials and Methods: Thirty freshly extracted human teeth with single and straight canals were used in this study.These teeth were cleaned and their crowns were removed at the cemento-enamel junction. The roots wereinstrumented using the step-back technique. A perforation was created on the mesial root surface at about 45-degree angle to the long axis of each root apico-coronally at the middle third by small round bur #1/2 with copiousirrigation of 2.5% NaOCL and 17% buffered solution of EDTA was used as the final rinse to remove the smear layer andto prevent the blockage of perforation. The 30 roots were divided randomly in to three groups (10 roots for eachgroup):- Group A: The root canal perforation was repaired by MTA then obturated by lateral condensationtechnique with gutta-percha and zinc oxide eugenol sealer. Group B: The root canal perforation was repaired byGIC then obturated by lateral condensation technique with gutta-percha and zinc oxide eugenol sealer. Group C:the roots were obturated with Epiphany obturation system by lateral condensation technique. The external surfacesof all roots were coated by two layers of sticky wax except the perforation site then immersed in 2% methylene bluedye for 48 hrs in incubator at 37C°. After that all roots were longitudinally sectioned for linear measurement of dyepenetration through the perforation using a stereomicroscope at X40 magnification with calibrated scale ocular grid.Results: The result showed that group A showed the lowest mean of dye leakage (0.77mm) while group C showedthe highest mean of dye leakage (4.45mm).Conclusion: Significantly less dye leakage in roots which perforations repaired by MTA than those repaired by GICand highly significant less dye leakage than those repaired by Epiphany obturation system

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