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Search Results: 1 - 10 of 2653 matches for " Abbas Makarem "
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Paraclinical Effects of Miswak Extract on Dental Plaque
Hamid Reza Poureslami,Abbas Makarem,Faraz Mojab
Dental Research Journal , 2007,
Abstract: Introduction: The Persian toothbrush tree or Miswak (Salvadora Persica L.) has been used as a brushing stick for more than 1,300 years. Pharmacological studies indicated antibacterial and antiinflammatory activities of Miswak extract. The present study was performed to determine antibacterial effects of Miswak extract.Material and Methods: The present experimental research involved three in vitro studies including: 1) in vitro testing of the effect of Miswak extract on selected bacteria; 2) comparing the paraclinical effects of Iranian toothpaste containing Miswak extract and placebo toothpaste on dental plaque; and 3) comparing the antibacterial effect of Iranian toothpaste with Swiss toothpaste(Quail Miswak) on dental plaque. The disc diffusion method was used to test bacterial sensitivity of toothpastes. Data were analyzed by paired t-test and ANOVA.Results: In the first study, Miswak extract inhibited the growth of some dental plaque bacteria. In the second study, antibacterial effect of the herbal toothpaste was significantly greater than that of the placebo (P =0.002). In the third study, four samples of dental plaque bacteria were used and there was no difference between the antibacterial effects of Swiss and Iranian herbal toothpastes (P =0.66).Conclusion: Due to antimicrobial effects of Miswak extract, its use in mouth rinses and toothpastes is highly recommended.
Berberine Gel in Periodontal Inflammation: Clinical and Histological Effects
Amir Moeintaghavi,Malihe Shabzendedar,Iman Parissay,Abbas Makarem
Journal of Periodontology & Implant Dentistry , 2012,
Abstract: Background and aims. Previous data have demonstrated that berberine, a barberry plant alkaloid, possesses various therapeutic properties. This study histologically evaluated the clinical efficacy of a berberine-derived topical gel on periodontal inflammation in patients requiring surgery.Materials and methods. This randomized clinical trial was performed on 14 patient (11 females, 3 males) presenting with moderate to severe periodontitis (pocket depth >4 mm). Plaque indices (PI) and gingival indices (GI) were recorded at baseline and scaling and root planing were carried out. One week later, PI and GI values were recorded again in patients treated on re-spective sides of the jaw with either berberine gel or a placebo gel control at night for two weeks. PI and GI were again meas-ured prior to periodontal surgery (three weeks after the initial visit). Specimens collected from both sides of the jaw were eval-uated histologically and PI and GI scores compared for statistical differences.Results. GI and PI scores were significantly different between baseline and follow-up examinations but no significant differ-ences were observed between the groups. No differences in the nature of the inflammatory cell types, degree of angiogenesis, integrity of collagen fibers and the levels of edema were observed between the groups; however, barberry gel-treated tissues presented with reduced levels of inflammatory cell infiltrates compared to placebo controls.Conclusion. Tissues treated with barberry gel extract had reduced numbers of inflammatory cells at the time of surgery. However, the GI and PI scores were not significantly different between the groups.
Evaluation of Survival Time of Tooth Color Dental Materials in Primary Anterior Teeth
Behjat-Al-Molook Ajami,Masoumeh Ebrahimi,Abbas Makarem,Taraneh Movahhed
Journal of Dental Materials and Techniques , 2012,
Abstract: Introduction: In restorative dentistry, selecting the proper material is an important factor for clinical success. The objective of this study was clinical evaluation of survival time of three tooth color materials in primary anterior teeth. Methods: In this interventional clinical trial study, 94 deciduous anterior teeth (36 teeth in boys, 58 teeth in girls) belonging to 3-5 year old children in Pediatric Department of Mashhad Faculty of Dentistry, Iran were selected. Selective dental materials included compoglass, glass-ionomer Fuji II LC, and composite resin. The data were analyzed with Kaplan–Meyer and Log rank test. Results: compoglass had the highest survival time in comparison with composite and glass-ionomer. Nine months retention rate for teeth restored with compoglass, composite resin and glass-ionomer were estimated: 95%, 21%, and 12.5%, respectively. Conclusion: Compoglass can be a suitable material for anterior primary teeth restoration.
The Relationship between Iron Deficiency and Hair Loss in 10 -45 Year Old Females in Qom Province, Iran
J Makarem
Qom University of Medical Sciences Journal , 2012,
Abstract: Background and Objectives: Iron deficiency is a highly prevalent problem in developing countries. One of the reasons for telogen effluvium is Iron deficiency. This study was conducted to determine the relationship between Iron deficiency and hair loss in Qom Province, Iran. Methods: This study was conducted in two separate stages. In the first stage, a cross- sectional, population-based study was performed. In the second stage, a case control study was carried out. The study was conducted during 2007 and 2008 on 10 to 45 year-old females in Qom Province. 2200 females in the first stage and 410 females in the second stage (205 females with telogen effluvium as cases, and 205 females without telogen effluvium as controls) were studied. Females with positive pull test and without exclusion criteria were considered as telogen effluvium. In both case and control groups, CRP and serum ferritin tests were done. Correlation of variables with hair loss and serum ferritin level was evaluated. Chi Square test, Student’s T test and Mann Whitney Test were taken for statistical analysis in SPSS ver. 16 software. Multiple logistic regressions were used for statistical modeling. Results: Median (range) of serum ferritin level in the case group was 18.7μg/L (0.7-174.5μg/L) but in the control group it was 22.1μg/L (2.8-167.9μg/L) (P=0.01). In 93 (45.4%) females of the case group and in 71 (34.6%) females in the control group ferritin level was lower than 15μg/L (P=0.02). In 1182 (53.7%) of 2200 female hair-loss was detected. In multivariate analysis older age and weight, being housekeeper and smoking were directly associated with hair loss. However, higher monthly income and possession of private house had opposite relationship with hair loss. Conclusion: Hair loss was a prominent problem in females in Qom Province and telogen effluvium was related to iron deficiency. In females in Qom Province, improvement of body iron resources with better nutrition style, administration of iron supplements and fortifying food with iron supplements is recommended.
Ultrasound-guided brachial plexus block: a study on 30 patients
Amiri HR,Makarem J
Tehran University Medical Journal , 2009,
Abstract: "n Normal 0 false false false EN-GB X-NONE AR-SA MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:Arial; mso-bidi-theme-font:minor-bidi;} Background: Successful brachial plexus blocks rely on proper techniques of nerve localization, needle placement, and local anesthetic injection. Standard approaches used today (elicitation of paresthesia or nerve-stimulated muscle contraction), unfortunately, are all "blind" techniques resulting in procedure-related pain and complications. Ultrasound guidance for brachial plexus blocks can potentially improve success and complication rates. This study presents the ultrasound-guided brachial plexus blocks for the first time in Iran in adults and pediatrics. "n"n Methods: In this study ultrasound-guided brachial plexus blocks in 30 patients (25 adults & 5 pediatrics) scheduled for an elective upper extremity surgery, are introduced. Ultrasound imaging was used to identify the brachial plexus before the block, guide the block needle to reach target nerves, and visualize the pattern of local anesthetic spread. Needle position was further confirmed by nerve stimulation before injection. Besides basic variables, block approach, block time, postoperative analgesia duration (VAS<3 was considered as target pain control) opioid consumption during surgery, patient satisfaction and block related complications were reported."n"n Results: Mean adult age was 35.5±15 and in pediatric group was 5.2±4. Frequency of interscalene, supraclavicular, axillary approaches to brachial plexus in adults was 5, 7, 13 respectively. In pediatrics, only supraclavicular approach was accomplished. Mean postoperative analgesia time in adults was 8.5±4 and in pediatrics was 10.8±2. No block related complication were observed and no supplementary, were needed. "nConclusions: Real-time ultrasound imaging during brachial plexus blocks can facilitate nerve localization and needle placement and examine the pattern and extend of local anesthetic spread.
Fentanyl-Bupivacaine combinations for continuous epidural analgesia: post operative pain in orthopedic surgery
Amiri,Makarem,Beiranvand
Tehran University Medical Journal , 2008,
Abstract: Background: post operative pain is an essential problem. Epidural infusion of two different doses of bupivacaine in pain management of post orthopedic surgeries was studied. Methods: In this double blinded randomized clinical trial we studied two groups of 42 patients undergone knee surgery. Based on block randomization, patients received two different concentration of bupivacaine (0.1% or 0.125%) in combination with fentanyl (1.7μg/ml). The beginning infusion rate was 5ml/h. Pain scores were documented by a blinded researcher 6, 12, 18, 24 and 48 hours after completion of surgery according to VAS tool. Patient satisfaction, complications and treatment failure (when increased volume of epidural infusion or other analgesics were required) were evaluated. Results: In higher bupivacaine dose group, post operative pain scores were not significantly lower in different hours and during the follow up (both p values less than 0.001). After 48 hours, patients satisfaction were more in the higher bupivacaine group. There were no significant differences in complications. Treatment failure was more significant in lower bupivacaine dose (33.3% versus 11.9%, p=0.03). Conclusion: continuous epidural infusion of both bupivacaine and fentanyl provide acceptable post operative pain control in orthopedic patients. Although higher concentrations of bupivacaine during first hours are more effective, lower concentrations are as effective as the higher one, during subsequent hours.
A Robust Fuzzy Tracking Control Scheme for Robotic Manipulators with Experimental Verification  [PDF]
Abdel Badie Sharkawy, Mahmoud M. Othman, Abouel Makarem A. Khalil
Intelligent Control and Automation (ICA) , 2011, DOI: 10.4236/ica.2011.22012
Abstract: The performance of any fuzzy logic controller (FLC) is greatly dependent on its inference rules. In most cases, the closed-loop control performance and stability are enhanced if more rules are added to the rule base of the FLC. However, a large set of rules requires more on-line computational time and more parameters need to be adjusted. In this paper, a robust PD-type FLC is driven for a class of MIMO second order nonlin- ear systems with application to robotic manipulators. The rule base consists of only four rules per each de- gree of freedom (DOF). The approach implements fuzzy partition to the state variables based on Lyapunov synthesis. The resulting control law is stable and able to exploit the dynamic variables of the system in a lin- guistic manner. The presented methodology enables the designer to systematically derive the rule base of the control. Furthermore, the controller is decoupled and the procedure is simplified leading to a computationally efficient FLC. The methodology is model free approach and does not require any information about the sys- tem nonlinearities, uncertainties, time varying parameters, etc. Here, we present experimental results for the following controllers: the conventional PD controller, computed torque controller (CTC), sliding mode con- troller (SMC) and the proposed FLC. The four controllers are tested and compared with respect to ease of design, implementation, and performance of the closed-loop system. Results show that the proposed FLC has outperformed the other controllers.
Total spinal anesthesia in an achondroplasic patient: case report
Amiri H R,Makarem J
Tehran University Medical Journal , 2008,
Abstract: Background: Total spinal anesthesia is a complication of lumbar epidural anesthesia following undiagnosed subarachnoid or subdural injection of local anesthetic. Although many achondroplastic dwarfs have a normal spine, catheter insertion may be more problematic with a narrow epidural space making a subarachnoid tap more probable. Other malformations associated with achondroplasia, such as prolapsed intervertebral discs, reduced interpedicular distance, shortened pedicles, and osteophyte formation, combined with a narrow epidural space may make identification of the space difficult and increases the risk of dural puncture. Furthermore, subarachnoid tap or dural puncture may be hard to recognize if a free flow of CSF is difficult to achieve due spinal stenosis. Yet, for those who meet the criteria, epidural regional anesthesia is frequently preferred over other forms, which often have more or more dangerous side effects in this type of patient.Case report: A 22-year-old achondroplastic male dwarf patient was scheduled for pelvic mass resection and was considered a candidate for continuous epidural anesthesia. The anesthesia became complicated by total spinal anesthesia, which was reversed following supportive management for about two hours.Conclusion: There is significant debate over the composition and volume of the test dose, especially for patients with achondroplasia. We nevertheless recommend repeated test-doses during the accomplishment of epidural anesthesia to exclude unintended intravascular, intrathecal or subdural injection, keeping in mind that a test dose of local anesthetic does not completely prevent complications.
A Comment on Link Dynamics and Protocol Design in a Multi-Hop Mobile Environment  [PDF]
Abbas Nayebi
Wireless Sensor Network (WSN) , 2011, DOI: 10.4236/wsn.2011.33012
Abstract: This paper is a supplementary document for “Link Dynamics and Protocol Design in a Multi-Hop Mobile Environment” (ref. [1]), which presents an analytic model to obtain link lifetime in mobile wireless networks. The model outcome is used as groundwork for several mobility-related evaluations. Here, it is discussed how an improper assumption in the probabilistic model led to some errors in the resultant expressions. After a detailed description of the erratic assumption, a modification is proposed to correct the derivations. The results of the new model are verified by the simulation results provided at the original paper.
Quintessence of Traditional and Agile Requirement Engineering  [PDF]
Jalil Abbas
Journal of Software Engineering and Applications (JSEA) , 2016, DOI: 10.4236/jsea.2016.93005
Abstract: Requirement gathering for software development project is the most crucial stage and thus requirement engineering (RE) occupies the chief position in the software development. Countless techniques concerning the RE processes exist to make sure the requirements are coherent, compact and complete in all respects. In this way different aspects of RE are dissected and detailed upon. A comparison of RE in Agile and RE in Waterfall is expatiated and on the basis of the literature survey the overall Agile RE process is accumulated. Agile being a technique produces high quality software in relatively less time as compared to the conventional waterfall methodology. The paramount objective of this study is to take lessons from RE that Agile method may consider, if quality being the cardinal concern. The study is patterned on the survey of the previous research reported in the coexisting literature and the practices which are being pursued in the area.
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