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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 | Drainage vs. non-drainage after cholecystectomy for acute cholecystitis:a retrospective study显示文摘Many surgeons practice prophylactic drainage after cholecystectomy without reliable evidence,this study was conducted to answer the question whether to drain or not to drain after cholecystectomy for acute calculous cholecystitis.A retrospective review of all patients who had cholecystectomy for acute cholecystitis in Aseer Central Hospital,Abha,Saudi Arabia,was conducted from April 2010 to April 2012.Data were extracted from hospital case files.Preoperative data included clinical presentation,routine investigations and liver function tests.Operative data included excessive adhesions,bleeding,bile leak,and drain insertion.Complicated cases such as pericholecystic collections,mucocele and empyema were also reported.Patients who needed therapeutic drainage were excluded.Postoperative data included hospital stay,volume of drained fluid,time of drain removal,and drain site problems.The study included 103 patients allocated into two groups;group A(n = 38) for patients with operative drain insertion and group B(n = 65) for patients without drain insertion.The number of patients with preoperative diagnosis of acute non-complicated cholecystitis was significantly greater in group B(80%) than group A(36.8%)(P < 0.001).Operative time was significantly longer in group A.All patients who were converted from laparoscopic to open cholecystectomy were in group A.Multivariate analysis revealed that hospital stay was significantly(P < 0.001) longer in patients with preoperative complications.There was no added benefit for prophylactic drain insertion after cholecystectomy for acute calculous cholecystitis in non-complicated or in complicated cases. | Mohammed A Bawahab Walid M Abd El Maksoud Saeed A Alsareii Fahad S Al Amri Hala F Ali Abdul Rahman Nimeri Abdul Rahman M Al Amri Adel A Assiri Mohammed I Abdul Aziz | 2014 | The Journal of Biomedical Research2014，28，3： | 3 |
| 3 | 构建AP-HTPB固体推进剂松弛模量主曲线的不同方法(英文)显示文摘分析了建立高氯酸铵-端羟基聚丁二烯(AP-HTPB)固体推进剂松弛模量主曲线的三种不同方法(Williams-Landel-Ferry(WLF)方法、Arrhenius方法和基本的时间-温度叠加(TTS)方法)。通过不同温度(-40,+20,+76℃)和10%常应变下1380s的应力松弛试验得到了复合固体推进剂松弛模量。通过评估松弛模量,给出转移因子和松弛模量主曲线,最后通过确定系数(R^2)得出了最佳的拟合方法。结果表明,基本TTS方法可给出最佳拟合曲线,因为该方法不依赖外部材料常数和应用中的经验方程,而且该方法可以适用于任何黏弹性材料。但是,在应用有限元软件时,经常要求用材料常数来定义非线性黏弹性材料模型,这种情况下,目前研究结果表明,当给出合适的常数后,WLF和Arrhenius两种方法均可给出满意的结果,而且WLF方法更为准确,因此在AP-HTPB固体推进剂有限元分析中倾向于采用这种方法。 | Walid M Adel 梁国柱 | 2017 | 含能材料2017，25，10： | 3 |
| 4 | Disruption of biofilms from sewage pipes under physical and chemical conditioning显示文摘Biofilms grown inside two sewage collecting pipes located in industrial and residential areas are studied. Bacterial biomass inside three layers of biofilms was evaluated. Biofilm cohesion under different mixing rate and ionic strength was also investigated. Effects of physical and chemical parameters in the biofilms were evaluated by monitoring turbidity,chemical and biochemical oxygen demands. Extracted organic matter from biofilms was partitioned to polar,aromatic and saturated fractions using activated silica column chromatography. Results revealed that bacterial biomass growth depending on biofilm thickness and stratification. The most loaded stratum in bacterial biomass was the sewage-biofilm interface stratum that represented 51% of the total bacterial biomass. Stirring rate and ionic strength of mono-and bivalent salts showed a major influence in biofilm disruption. The stirring time enhanced the exchange dynamic and matter capture between biofilm fragments at the critical stirring rate 90 r/min. Sodium chloride showed the dispersing effect on biofilms in suspension,and decreased the BOD5(biochemical oxygen demand) beyond the physiological salt concentration. | Charbel Mahfoud Antoine El Samrani Rita Mouawad Walid Hleihel Rim El Khatib Bruno S. Lartiges Nam Ouani | 2009 | Journal of Environmental Sciences2009，21，1： | 2 |
| 5 | The role of laparoscopic myomecto-my in the management of uterine fibroids显示文摘 | Sami Walid M Heaton RL | 2011 | Current opin-ion in Obstetrics&Gynecology2011，23，4： | 1 |
| 6 | Tree Formation with Physical Layer Security Considerations in Wireless Multi-Hop Networks显示文摘 | Walid S Zhang Xiangyun Behrouz M | 2012 | IEEE Transactions on Wireless Communication2012，11，11： | 1 |
| 7 | The role of laparoscopic myomectomy in the management of uterine fibroids 显示文摘 | Sami Walid M Heaton RL | 2011 | Curr Opin Obstet Gy- neco12011，23，4： | 1 |
| 8 | Role of Tc-^99m SESTAMIBI in assesmnent of treatment response to chemotherapy in bone sarcomas显示文摘 | Baef R Hosna M Walid O | 2001 | Cancer Inst2001，13，1： | 1 |
| 9 | The role of laparoscopic myomectomy in the management of uterine fibroids显示文摘 | Sami Walid M Heaton RL | 2011 | Curr Opin Obstet Gynecol2011，，4： | 1 |
| 10 | Can pseudotumor cerebri predispose to placental abruption显示文摘 | Walid MS Sanoufa M Robinson JS Jr | 2010 | South Med J2010，103，5： | 1 |
| 11 | The role of laparoscopic myomec - tomy in the management of uterine fibroids 显示文摘 | Sami Walid M Heaton RL | 2011 | Curr Opin Obstet Gynecol2011，23，4： | 1 |
| 12 | The PI3-kinase and mTOR signaling pathways are important modulators of epithelial tubule formation显示文摘 | Walid S Eisen R Ratcliffe D R Dai K Hussain M M Ojakian G K | 2008 | J Cell Physiol2008，216，： | 1 |
| 13 | The role of laparoscopic my- omectomy in the management of uterine fibroids显示文摘 | Sami Walid M Heaton RL | 2011 | Curr Opin Obstet Gy-necol2011，23，4： | 1 |
| 14 | Cerebellar anaplastic astrocytoma in a teenager with Ollier Disease显示文摘 | Walid M S Troup E C | 2008 | J Neurooncol2008，89，1： | 1 |
| 15 | The role of drains in lumbar spine fusion显示文摘 | Walid MS Abbara M Tolaymat A | | 0，，： | 1 |
| 16 | Evaluating Cost Overruns of Asphalt Paving Project Using Statistical Process Control Methods显示文摘 | KHALED M Nassar WALID M Nassar MOHAMED Y Hegab | 2005 | Journal of Construction Engineering and Management2005，131，11： | 1 |
| 17 | Research progress of silicon-based flame retardant 显示文摘 | Fox Douglas M Beltayer Severine Awad Walid H | 2004 | Polymer Preprints2004，45，1： | 1 |
| 18 | An integrated distributed generation optimization model for distribution system planning显示文摘 | EI-KHATTAM WALID HEGAZY Y G SALAMA M M A | | 0，，02： | 1 |
| 19 | Expression of bacterial L-aspartate- a-decarboxylase in tobacco increases β-alanine and pantothenate levels and improves thermotolerance 显示文摘 | Walid M F Bala R | 2006 | Plant Molecular Biology2006，60，： | 1 |
| 20 | The role of laparoscopic myomectomy in the management of uterine fibroids 显示文摘 | Sami Walid M Heaton RL | 2011 | Curr Opin Obstet GynecoI2011，23，4： | 1 |
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