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| 1 | Effect of restoration technique on resistance to fracture of endodontically treated anterior teeth with flared root canals显示文摘This study was designed to compare the impact of post and core systems on resistance to fracture of endodontically treated anterior teeth with flared root canals and to assess their fracture pattern. Sixty central incisors were cut horizontally 2 mm coronal to the cementoenamel junction(CEJ). After root canal therapy, teeth were assigned into 6 groups(n = 10 each) based on a post system and used as follows: Group C, non-flared root received size #1 glass fiber posts(Control); Group AP, flared root restored with anatomical post; Group RC, flared root restored with size #1 fiber post and cemented with thick layer of resin cement; Group CR, flared root restored with size #1 and reinforced with composite resin; Group CM, cast post-core; Group CP, CAD/CAM polymer-infiltrated ceramic post and core.Following post cementation, core build-up and crown insertion, the specimens were thermo-cycled up to 10,000 cycles(5 C/55 C; 30 seconds dwell time, 6 seconds transition time) and then statically loaded at 1 mm/minute crosshead speed using a universal testing machine. One-way ANOVA and Tukey HSD post hoc test(α= 0.05) were used for data analysis. Group C recorded significantly higher resistance to fracture values [(826.9±39.1) N] followed by group CP [(793.8±55.6) N] while group RC yielded the lowest fracture resistance values [(586.7±51.4) N]. The resistance to fracture of wide root canals can be enhanced by using one-piece CAM/CAM post and core as an alternative to the use of either glass fiber post, relined with composite resin increasing the thickness of luting cement or the use of cast post and core system. However, this was an in vitro investigation and further in vivo studies are necessary. | Sary S Borzangy Samah M Saker Walid A Al-Zordk | 2019 | The Journal of Biomedical Research2019，33，2： | 4 |
| 2 | Helicobacter pylori may be an initiating factor in newly diagnosed ulcerative colitis patients: A pilot study显示文摘AIM To directly visualize Helicobacter pylori(H. pylori) by the highly sensitive and specific technique of immunohistochemical staining in colonic tissue from patients newly diagnosed with ulcerative colitis(UC).METHODS Colonoscopic biopsies from thirty patients with newly diagnosed UC and thirty controls were stained with Giemsa stain and immunohistochemical stain for detection of H. pylori in the colonic tissue. Results were confirmed by testing H. pylori Ag in the stool then infected patients were randomized to receive either anti H. pylori treatment or placebo.RESULTS Twelve/30(40%) of the UC patients were positive for H. pylori by Giemsa, and 17/30(56.6%) by immunohistochemistry stain. Among the control group 4/30(13.3%) and 6/30(20 %) were positive for H. pylori by Giemsa and immunohistochemistry staining respectively. H. pylori was significantly higher in UC than in controls(P = 0.04 and 0.007). All Giemsa positive patients and controls were positive by immunohistochemical stain. Four cases of the control group positive for H. pylori also showed microscopic features consistent with early UC.CONCLUSION H. pylori can be detected in colonic mucosa of patients with UC and patients with histological superficial ulcerations and mild infiltration consistent with early UC. There seems to be an association between UC and presence of H. pylori in the colonic tissue. Whether this is a causal relationship or not remains to be discovered. | Loai Mansour Ferial El-Kalla Abdelrahman Kobtan Sherief Abd-Elsalam Mohamed Yousef Samah Soliman Lobna Abo Ali Walaa Elkhalawany Ibrahim Amer Heba Harras Maha M Hagras Mohamed Elhendawy | 2018 | World Journal of Clinical Cases2018，6，13： | 4 |
| 3 | Damage of carbon-carbon composite surfaces under high pressure and shear strain 显示文摘 | SAMAH A PAULMIER D MANSORI M E | 1999 | Surf Coat Technol1999，，： | 1 |
| 4 | Evaluation of the antifibrotic effectof fenofibrate and rosiglitazone on bleomycin-induced pulmonary fibrosisin rats显示文摘 | Samah M Abd E R Mona K T | 2012 | European Journal of Pharmacology2012，689，13： | 1 |
| 5 | Medical treatment of inflammatory punctual stenosis monitored by anterior segment optical coherence tomography显示文摘AIM:To evaluate the role of medical treatment in the management of inflammatory punctum stenosis guided by spectral domain anterior segment optical coherence tomography(OCT).METHODS:This prospective study included 60 patients complaining of epiphora due to inflammatory punctual stenosis.They were divided into two groups:Group A(30 patients)treated with a combination of preservative free hydrocortisone sodium phosphate 3.35 mg/m L eye drops,and preservative free artificial tears based on sodium hyaluronate,polyethylene and propylene Glycol;Group B(30 patients)treated with the same preservative free artificial tears only.Thirty normal subjects were included for comparison of pre-treatment anatomical parameters.Before starting treatment,all patients underwent anterior segment assessment including slit lamp examination,measurement of intraocular pressure(IOP),fluorescein dye disappearance test,and measurement of the outer punctum diameter(OPD)by Spectral domain anterior segment OCT.All assessments were repeated at each follow up done at 1 and 3 mo later,together with subjective evaluation of patient’s satisfaction of the treatment outcome by simple rating questionnaire.RESULTS:Punctual diameter increased significantly with treatment in both groups(P<0.0001);although the widening was more in Group A as compared to group B(16.2%vs 8%of the original punctual size,mean difference of 28.933μm,P=0.0076).Subjective satisfaction with treatment outcome was also better in group A(70%vs 40%,Chi-square P=0.0397).CONCLUSION:A combination of preservative free steroid eye drops and artificial tears causes significant widening of inflammed stenotic punctae and improvement of the associated epiphora. | Hanan Youssef Elalfy Mahmoud A Elsamkary Ahmed M Shafek Elridy Tarek M Saad Saad Mohamed Rashad Samah M Fawzy | 2020 | International Journal of Ophthalmology(English edition)2020，13，7： | 1 |
| 6 | Damage of carbon/carbon composites surface under high pressure and shear strain 显示文摘 | SAMAH A PAULMIER D MANSORI M EI | 1999 | Surface and Coating Technology1999，，： | 1 |
| 7 | Predietors of mammography screening among Iranian women attending out-patient clinics in tehran,Iran显示文摘 | Ahmadian M Samah AA Redzuan M | 2012 | Asian Pac J Cancer Prey2012，13，3： | 1 |
| 8 | A global perspective on the use,sales,exposure pathways,occurrence,fate and effects of veterinary antibiotics in the environment显示文摘 | Samah A K Meyer M T Boxall A B A | 2006 | Chemosphere2006，65，： | 1 |
| 9 | Investigation of the melanocyte stimulating hormones on food intake显示文摘 | Caroline R Abbott Michela Rossi Min-Seon Kim Samaher H AlAhmed Gillian M Taylor Mohammad A Ghatei David M Smith Stephen R Bloom | 2000 | Brain Research2000，，1： | 1 |
| 10 | Damage of carbon-carbon composite surfaces under high pressure and shear strain 显示文摘 | Samah A Paulmier D Mansori M E | 1999 | Surface and Coatings Technology1999，，120121： | 1 |
| 11 | Fractionation and identification of ACE-inhibitory peptides li'om a-lactalbumin and 13-casein produced by thermolysincatalysed hydrolysis显示文摘 | Jeanette Otte Samah M A Shalaby Mila Zakora | 2007 | International Dairy Journal2007，17，12： | 1 |
| 12 | Damage of carbon-carbon composites surfaces under high pressure and shear strain显示文摘 | Samah A Paulmier D Mansori M El | 1999 | Surface and Coatings Technology1999，，： | 1 |
| 13 | Evaluation of the antifibrotic effect of fenofibrate and rosiglitazone on bleomyein-induced pulmonary fibrosis in rats显示文摘 | Samah M E1-Aidy Ael-R Tawfik MK | 2012 | Eur J Pharmacol2012，689，123： | 1 |
| 14 | Predictors of mammography screening among Iranian women attending outpatient clinics in Tehran,Iran显示文摘 | Ahmadian M Samah AA Redzuan M | 2012 | Asian Pac J Cancer Prev2012，13，3： | 1 |
| 15 | Fractionation and identification of ACE-inhibitory peptides from a-lactalbumin and b-casein produced by thermolysin-catalysed hydrolysis 显示文摘 | Jeanette Otte Samah M A Shalaby Mila Zakora | 2007 | Intemational Dairy Journal2007，，17： | 1 |
| 16 | Energy-transfer efficiency in Eu-doped Zn O thin films:The effects of oxidative annealing on the dynamics and the intermediate defect states显示文摘 | Samah M Ahmed Paul Szymanski | 2014 | ACS Appl Mater Interfaces2014，6，3： | 1 |
| 17 | Performance of two commonly used angiotensin-converting enzyme inhibition assays using FA-PGG and HHL as substrates显示文摘 | SAMAH M S MILA Z JEANETTE O | 2006 | Journal of Dairy Research2006，73，2： | 1 |
| 18 | Iranian women attending outpatient clinics in Tehran, Iran 显示文摘 | Ahmadian M Samah AA Redzuan M | 2012 | Asian Pac J Cancer Prev2012，13，3： | 1 |
| 19 | A global perspective on the use, sales, exposure pathways, occurrence, fate and effects of veterinary antibiotics in the environment 显示文摘 | Samah A K Meyer M T Boxall A B A | 2006 | Chemosphere2006，65，： | 1 |
| 20 | Assessment of research productivity of Arab countries in the field of infectious diseases using Web of Science database显示文摘Background:To meet the future challenges of infectious diseases and limit the spread of multidrug resistant microorganisms,a better understanding of published studies in the field of infectious diseases is needed.The objective of this study was to analyze the quantity and quality of research activity in the field of infectious diseases in Arab countries and compare it with that in non-Arab countries.Methods:Documents published in Arab countries within the research category of“infectious diseases”were extracted and analyzed using the Web of Science database.The data analyzed represent research productivity during the time interval between 1900–2012.Results:Worldwide,the total number of documents published in the field of infectious diseases up to 2012 was 227,188.A total of 2,408 documents in the field of infectious diseases were published in Arab countries,which represents 1.06%of worldwide research output.Research output from Arab countries in the field of infectious diseases was low for decades.However,approximately a five-fold increase was observed in the past decade.Arab countries ranked 56th to 218th on the standard competition ranking(SCR)in worldwide publications in the field of infectious diseases.Egypt,with a total publication of 464(19.27%)documents ranked first among Arab countries,while Kuwait University was the most productive institution with a total of 158(6.56%)documents.Average citation per document published in Arab countries was 13.25 and the h-index was 64.Tuberculosis(230;9.55%),malaria(223;9.26%),and hepatitis(189;7.8%)were the top three infectious diseases studied as according to the retrieved documents.Conclusion:The present data reveals that some Arab countries contribute significantly to the field of infectious diseases.However,Arab countries need to work harder to bridge the gap in this field.Compared with non-Arab countries in the Middle East,research output from Arab countries was high,but more efforts are needed to enhance the quality of this output.Future research in the field should be encouraged and correctly directed. | Waleed M Sweileh Samah W Al-Jabi Alaeddin Abuzanat Ansam F Sawalha Adham S AbuTaha Mustafa A Ghanim Sa’ed H Zyoud | 2015 | Infectious Diseases of Poverty2015，4，1： | 0 |
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