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| 1 | Processing and mechanical properties of porous 316L stainless steel for biomedical applications显示文摘Highly porous 316L stainless steel parts were produced by using a powder metallurgy process, which includes the selective laser sintering(SLS) and traditional sintering. Porous 316L stainless steel suitable for medical applications was successfully fabricated in the porosity range of 40%-50% (volume fraction) by controlling the SLS parameters and sintering behaviour. The porosity of the sintered compacts was investigated as a function of the SLS parameters and the furnace cycle. Compressive stress and elastic modulus of the 316L stainless steel material were determined. The compressive strength was found to be ranging from 21 to 32 MPa and corresponding elastic modulus ranging from 26 to 43 GPa. The present parts are promising for biomedical applications since the optimal porosity of implant materials for ingrowths of new-bone tissues is in the range of 20%-59% (volume fraction) and mechanical properties are matching with human bone. | Montasser M. DEWIDAR Khalil A. KHALIL J. K. LIM | 2007 | 中国有色金属学会会刊:英文版2007，17，3： | 14 |
| 2 | A New Approach for Manufacturing a High Porosity Ti-6Al-4V Scaffolds for Biomedical Applications显示文摘Titanium and its alloys are currently considered as one of the most important metallic materials used in the biomedical applications,due to their excellent mechanical properties and superior biocompatibility.In the present study,a new effective method for fabricating high porosity titanium alloy scaffolds was developed. Porous Ti-6Al-4V scaffolds are successfully fabricated with porosities ranging from 30% to 70% using space- holder and powder sintering technique.Based on its acceptable properties,spherical carbamide particles with different diameters (0.56,0.8,and 1 mm) were used as the space-holder material in the present investigation. The Ti-6Al-4V scaffolds porosity is characterized by using scanning electron microscopy.The results show that the scaffolds spherical-shaped pores are depending on the shape,size and distribution of the space-holder particles.This investigation shows that the present new manufacturing technique is promising to fabricate a controlled high porosity and high purity Ti-6Al-4V scaffolds for hard tissue replacement. | Montasser DEWIDAR H.Fouad MOHAMED Jae-Kyoo LIM | 2008 | Journal of Materials Science & Technology2008，24，6： | 4 |
| 3 | Annexin A2 as a biomarker for hepatocellular carcinoma in Egyptian patients显示文摘AIM To investigate the clinical utility of serum annexin A2(ANXA2) as a diagnostic marker for early hepatocellular carcinoma(HCC).METHODS This study was performed in HCC Clinic of Ain Shams University Hospitals, Cairo, Egypt and included: Group 1: Fifty patients with early stage HCC(Barcelona Clinic Liver Cancer stage A); Group 2: Twenty five patients with chronic liver disease; and Control Group: Fifteen healthy, age-and sex-matched subjects who were seronegative for viral hepatitis markers. The followinglaboratory investigations were done: Viral hepatitis markers [hepatitis B surface antigen and hepatitis C virus(HCV) antibodies], HCV RNA in HCV antibody-positive patients, serum alpha fetoprotein(AFP), and serum ANXA2 levels.RESULTS In this study, 88% of HCC patients(n = 44) were HCVpositive, while HBV infection represented only 8% of all HCC patients(n = 4); and two patients were negative for both viral markers. A highly significant difference was found between patients with HCC and chronic liver disease as well as controls with regard to serum ANXA2 levels(130, IQR 15-240; 15, IQR 15-17; and 17, IQR 15-30 ng/m L, respectively). The area under the curve of ANXA2 was 0.865; the cut-off value was established to be 18 ng/mL with a diagnostic sensitivity of 74% and a specificity of 88%, while the sensitivity and specificity of AFP at the cut-off value of 200 ng/dL were 20% and 100%, respectively.CONCLUSION Serum ANXA2 may serve as a biomarker for the early detection of HCC. | Mohamed K Shaker Hanzada I Abdel Fattah Ghada S Sabbour Iman F Montasser Sara M Abdelhakam Eman El Hadidy Rehab Yousry Ahmed K El Dorry | 2017 | World Journal of Hepatology2017，9，9： | 4 |
| 4 | N-butyl-2-cyanoacrylate, iso-amyl-2-cyanoacrylate and hypertonic glucose with 72% chromated glycerin in gastric varices显示文摘AIM: To compare n-butyl-2-cyanoacrylate, iso-amyl-2-cyanoacrylate and a mixture of 72% chromated glycerin with hypertonic glucose solution in management of gastric varices. METHODS: Ninety patients with gastric varices presented to Endoscopy Unit of Ain Shams University Hospital were included. They were randomly allocated into three groups; each group included 30 patients treated with intravariceal sclerosant injections in biweekly sessions till complete obturation of gastric varices; Group I(n-butyl-2-cyanoacrylate; Histoacryl), Group II(iso-amyl-2-cyanoacrylate; Amcrylate) and Group III(mixture of 72% chromated glycerin; Scleremo with glucose solution 25%). All the procedures were performed electively without active bleeding. Recruited patients were followed up for 3 mo. RESULTS: 26% of Scleremo group had bleeding during puncture vs 3.3% in each of the other two groups with significant difference,(P < 0.05). None of Scleremo group had needle obstruction vs 13.3% in each of the other two groups with no significant difference,(P > 0.05). Rebleeding occurred in 13.3% of Histoacryl and Amcrylate groups vs 0% in Scleremo group with no significant difference. The in hospital mortality was 6.6% in both Histoacryl and Amcrylate groups, while it was 0% in Scleremo group with no significant difference. In the first and second sessions, the amount of Scleremo needed for obturation was significantly high, while the amount of Histoacryl was significantly low. Scleremo was the less costly of the two treatments. CONCLUSION: All used sclerosant substances showed efficacy and success in management of gastric varices with no significant differences except in total amount, cost and bleeding during puncture. | Reda Elwakil Mohamed Fawzy Montasser Sara M Abdelhakam Wesam A Ibrahim | 2015 | World Journal of Gastrointestinal Endoscopy2015，7，4： | 3 |
| 5 | Living donor liver transplantation for high model for endstage liver disease score:What have we learned?显示文摘AIM: To assess the impact of model for end-stage liver disease(MELD) score on patient survival and morbidity post living donor liver transplantation(LDLT). METHODS: A retrospective study was performed on 80 adult patients who had LDLT from 2011-2013. Nine patients were excluded and 71 patients were divided into two groups; Group 1 included 38 patients with a MELD score < 20, and Group 2 included 33 patients with a MELD score > 20. Comparison between both groups was done regarding operative time, intra-operative blood requirement, intensive care unit(ICU) and hospital stay, infection, and patient survival.RESULTS: Eleven patients died(15.5%); 3/38(7.9%)patients in Group 1 and 8/33(24.2%) in Group 2 with significant difference(P = 0.02). Mean operative time, duration of hospital stay, and ICU stay were similar in both groups. Mean volume of blood transfusion and cell saver re-transfusion were 8 ± 4 units and 1668 ± 202 m L, respectively, in Group 1 in comparison to 10 ± 6 units and 1910 ± 679 m L, respectively, in Group 2 with no significant difference(P = 0.09 and 0.167, respectively). The rates of infection and systemic complications(renal, respiratory, cardiovascular and neurological complications) were similar in both groups. CONCLUSION: A MELD score > 20 may predict mortality after LDLT. | Hany Dabbous Mohammad Sakr Sara Abdelhakam Iman Montasser Mohamed Bahaa Hany Said Mahmoud El-Meteini | 2016 | World Journal of Hepatology2016，8，22： | 2 |
| 6 | Protective effects of Balanites aegyptiaca extract, melatonin and ursodeoxycholic acid against hepatotoxicity induced by methotrexate in male rats显示文摘Objective: To compare the degree of ameliorative effects of Melatonin(MEL), Ursodeoxycholic acid(UDCA) and Balanites aegyptiaca(BA) against hepatotoxicity induced by MTX for one month. Methods: Eighty adult male rats(Sprague Dawely) weighing(190±10g), were randomly divided into eight equal groups: Control, MTX, MEL, BA, UDCA, MTX+MEL, MTX+BA, MTX+UDCA. Liver function biomarker enzymes, liver tissue oxidative stress parameters, together with total antioxidant capacity and tumor necrosis factor(TNF-α) were determined. Histopathological and immunohistochemistry examinations for TNF-α were also done. Results: MTX showed significant increase in alanine transaminase(ALT), aspartate transaminase(AST), alkaline phosphatase(ALP), gamma glutamyl transferase(GGT), total and direct bilirubin, as well as TNF-α levels, oxidized glutathione(GSSG), malodialdehyde(MDA) and nitric oxide(NO). whereas, total protein, albumin, total antioxidant capacity, reduced glutathione(GSH), glutathione peroxidase(GPx), glutathione reductase(GR), glutathione S-transferase(GST), superoxide dismutase(SOD) and catalase(CAT) levels were significantly decreased in MTX treated group. These alterations were improved by MEL and BA treatment, whereas no improvement was noticed in UDCA treatment. Conclusions: BA may be as promising as MEL in the hepatoprotection against MTX toxicity through their antioxidant and radical scavenging activities. In addition, it is not recommended to co-administer UDCA with MTX as it enhanced inflammation and damage to the liver. | Ayat OS Montasser Hanan Saleh Omar A.Ahmed-Farid Aida Saad Mohamed-Assem S.Marie | 2017 | Asian Pacific Journal of Tropical Medicine2017，10，6： | 2 |
| 7 | A new model of diffuse brain injury in rats,part1 and part2显示文摘 | Montasser A Abd-Elfattah Foda MS Marmarou A | 1994 | J Neurosurg1994，80，： | 1 |
| 8 | Closure property of the NBUC class under formation of parallel systems 显示文摘 | M I Hendi A F Mashhour M A Montasser | 1993 | Journal of Applied Probability1993，30，： | 1 |
| 9 | Evaluation of serum squamous cell carcinoma antigen as a novel biomarker for diagnosis of hepatocellular carcinoma in Egyptian patients显示文摘 | M Hussein A Ibrahim H Abdella I Montasser M Hassan | 2008 | Indian Journal of Cancer2008，，4： | 1 |
| 10 | A new model of diffuse brain injury in rats,part 1 and 2显示文摘 | Montasser A Abd-Elfattah Foda MS Marmarou A | 1994 | J Neurosurg1994，80，： | 1 |
| 11 | Pretreat- ment and on-treatment indicators of virologic breakthrough of lamivudine therapy in chronic hepatitis B patients:an Egyp- tian study显示文摘 | Montasser MF Abdelkader NA Ismail SA | 2014 | Acta Virologica2014，58，3： | 1 |
| 12 | Detection of potato leafroll andstraw berry mild yellow-edge luteo virus by RT-PCR 显示文摘 | Hadidi A Montasser M S Levy L | 1993 | PlantDisease1993，77，6： | 1 |
| 13 | Detection of potato leafroll and strawberry mild yellow-edge luteoviruses by reverse transcription -polymerase chain reaction amplification显示文摘 | HADIDI A MONTASSER M S LEVY L | 1993 | Plant Disease1993，77，： | 1 |
| 14 | A new model of diffuse brain injury in rats 显示文摘 | Marmarou A Montasser A Foda A | 1994 | Journal of neurosurgery1994，80，： | 1 |
| 15 | Gene by smok- ing interaction in hypertension : identification of a major quantita- tive trait locus on chromosome 15q for systolic blood pressure in Mexican - Americans显示文摘 | Montasser M E Shimmin L C Hanis C L | 2009 | J Hypertens2009，27，3： | 1 |
| 16 | Role of procalcitonin in diagnosis of bacterial infection in trans-arterial chemoembolisation treated hepatocellular carcinoma patients显示文摘 | Dabbous HK Ali-Eldin FA Montasser IM | 2015 | Arab J Gastroenterol2015，16，1： | 1 |
| 17 | Closure probability of the NBUC class of life distributions under formation of parallel systems显示文摘 | HENDI M L MASHHOUR A F MONTASSER M A | 1993 | Journal of Applied Probability1993，30，： | 1 |
| 18 | Self-Iigating bracket claims显示文摘 | Montasser MA | 2010 | Am J Orthod Dentofacial Orthop2010，138，5： | 1 |
| 19 | Detection of potato leafroll and straw berry mild yellow-edge luteovirus by RT- PCR 显示文摘 | Hadidi A Montasser M S Levy L | 1993 | Plant Disease1993，77，6： | 1 |
| 20 | A new model of diffuse brain injury显示文摘 | Marmarou A Montasser A Wimer Van Den Brink | 2004 | J Neurosurg2004，80，2： | 1 |
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