Alireza Heidari

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BACKGROUND Injecting drug users (IDUs) are a major and most important risk factor for rising hepatitis C virus (HCV) prevalence in Iran. OBJECTIVES The objective of this study was to determine the effectiveness of methadone maintenance treatment (MMT) in prevention of HCV infection transmission among IDUs. PATIENTS AND METHODS A mathematical modeling(More)
Double tachycardia is a relatively rare condition. We describe a 21 year old woman with history of frequent palpitations. In one of these episodes, she had wide complex tachycardia with right bundle branch and inferior axis morphology. A typical atrioventricular nodal tachycardia was induced during electrophysiologic study, aimed at induction of clinically(More)
BACKGROUND The increase in high-risk injections and unsafe sexual behaviors has led to increased HIV infection prevalence among Intravenous Drug Users (IDUs). The high costs of HIV/AIDS care and low financial resources necessitate an economic evaluation to make the best decision for the control of HIV/AIDS. OBJECTIVES This study was conducted to determine(More)
BACKGROUND It is shown that neuropeptides can be transported from pulp chamber to periodontal ligament through apical foramen and accessory canals. Therefore, clinical pulpal pain leads to expression of preinflammatory neuropeptides such as substance P (SP) and neurokinin A (NKA) in gingival crevicular fluid (GCF). This study aimed to evaluate levels of SP(More)
OBJECTIVES This study aimed to compare the shear bond strength (SBS) of composite to stainless steel crowns (SSC) using two mechanical surface treatments (MSTs) and two bonding systems. MATERIALS AND METHODS Eighty-four SSCs were divided into six groups of 14; Group1: No MST+Scotchbond Universal adhesive (N+U), Group 2: Surface roughening by a diamond(More)
INTRODUCTION Burnout causes physical and emotional tireness, job dissatisfaction, resulting in reduced efficiency and a feeling of alienation from colleagues. Also, job satisfaction has a major impact on job-related behaviors, such as turnover intention, absenteeism, and job performance. The aim of this study was to determine job burnout, job satisfaction(More)
OBJECTIVES Asthma is a common chronic disease. Asthma and anti-asthmatic medications have been suggested as risk factors for increased susceptibility to caries. This study was conducted to evaluate the effects of different types and forms of antihistaminic medications and the duration of drug consumption on the severity of dental caries in asthmatic(More)
INTRODUCTION Newborn screening (NBS) is a public health measure aimed at identification of early cases, management of afflicted infants, and making efforts to reduce the morbidity and mortality among newborns. All countries may face challenges in implementation of screening programs. The present study aimed to determine the challenges of implementation of(More)
— The ability of silicon to make faster computer chips ends soon. Thus, scientists have introduced DNA as a proper and clean alternative and source. Research on molecular computers is at initial steps. Molecular computers, in their current state, are composed of DNA and enzymes and there, still, remains a long way to achieving this dream. DNA computers will(More)
STATEMENT OF PROBLEM Early childhood caries can cause pain, discomfort and also inability to have a healthy nutrition .Malnutrition can be characterized when there is a weight, height, and body mass index (BMI) deficiency. PURPOSE The aim of this study was to evaluate the relationship between the severe early childhood caries (based on the dmft index) and(More)