1,131 Works

Association between demographic and health indicators among 174 countries, 2004-2011

Abbas Abbasi, Saeid Safiri, Ahmad Faramarzi, Mohammad Javad Kabir & Meysam Chahkoie
Introduction: Human resources are one of the most important factors in developing of countries and have a considerable role in the developing status of countries. Hence, our aim in this study was to assess the relationship between health indicators and population indexes (population growth and composition). Methods: The present study was conducted using panel data from 176 countries during 8 years from 2004 to 2011. Data were obtained from World Health Organization (WHO) and World...

Prevalence of occupational stress and its correlates among firefighters, Tehran, Iran, 2013

Mahdi Sepidarkish, Saeid Safiri, Seyed Hadi Hosseini & Reza Pakzad
Introduction: Among the various occupations, firefighters are exposed to stress due to the nature of their occupational. Hence, our aim in this study was to assess occupational stress and its correlates among Tehran’s firefighters, Iran. Methods: A cross-sectional study was carried out among firefighters of Tehran in 2013. A total of 312 staff of firefighting organization selected from five operating region through a multistage sampling. Demographic and occupational stress questionnaires were filled by subjects. Finally,...

Prevalence and risk factors of Hepatitis A in children in Tabriz, Iran

Mandana Rafeey & Maryam Shoaran
Introduction: Hepatitis A is the most common viral hepatitis during childhood especially in developing countries. It is, usually, self-limiting, but may be associated with severe complications in some patients particularly those with comorbidities. This study was aimed to determine the seroprevalence of hepatitis A in 2-16 years old children in Tabriz, Iran. Methods: The study was a cross-sectional survey on all children who were referred to the clinic of Tabriz children hospital. For every subject,...

Epithelial salivary gland tumors in Ahvaz, southwest of Iran

Saede Atarbashi Moghadam, Fazele Atarbashi Moghadam & Mehdi Dadfar
Background and aims. Salivary gland tumors are rare and specific lesions. There are differences in the incidence and frequency of salivary tumors in both minor and major salivary glands in different countries. This study was carried out to determine the prevalence of major and minor salivary gland tumors in Ahvaz in the south of Iran. Materials and methods. All the cases, recorded in Imam Khomeyni Hospital and Shafa Hospital, Ahvaz, Iran from 1997 to 2008...

Study of renal stones complications in 200 patients in Tabriz, Iran

Hamid Noshad, Farhad Ahmadpour, Bita Soltanpour & Morteza Ghojazadeh
Introduction: Urinary stones are the third most common disease of the urinary. Renal stones may lead to some preventable complications. This study was designed to investigation and prediction of these complications. Methods: In this cross-sectional study, 200 patients with kidney stones were enrolled. Kidney stone was confirmed and proven in all patients referred to Sina and Shaikh Al-Rais clinics. Their demographic characteristics like gender, age, stone number, stone type, renal failure and bio-chemistry data were...

Oromandibular-limb hypogenesis syndrome type II C: a rare case

Renita Lorina Castelino, Shishir Ram Shetty, Subhas Babu G & Kumuda Arvind Rao H T
The oromandibular-limb hypogenesis syndrome comprises a group of anomalies which simultaneously affect the mandible, tongue, and maxilla with or without reductive limb anomalies. It is characterized by failure of development of the intraoral region and distal extremities. Multiple and variable deformities of the mandible, maxilla and tongue may occur in combination with a variety of limb defects. The wide range of presentation and combination of anomalies make classification difficult. They usually feature primarily in sporadic...

Evaluation of Radiation-induced Xerostomia in Patients with Nasopharyngeal Carcinomas

Narmin Mohammadi, Farshad Seyyednejhad, Parnian Alizadeh Oskoee, Siavash Savadi Oskoee & Niloofar Mofidi
Background and aims. Salivary glands are extremely susceptible to radiation injuries. The aim of this study was to evaluate radiation-induced xerostomia in patients with nasopharyngeal carcinomas, referring to Tabriz Imam Khomeini Hospital in 2005-2006. Materials and methods. Thirty patients with nasopharyngeal carcinomas, who received conventional radiotherapy, were included in the present study. The patients’ unstimulated saliva samples were collected at three intervals, i.e. before treatment, 3 weeks after the initiation of treatment and at the...

pH-Triggered Magnetic-Chitosan Nanogels (MCNs) For Doxorubicin Delivery: Physically vs. Chemically Cross Linking Approach

Somayeh Sadighian, Hassan Hosseini-Monfared, Kobra Rostamizadeh & Mehrdad Hamidi
Purpose: This paper evaluates the impact of cross linking strategy on the characteristics of magnetic chitosan nanogels (MCNs) as targeted drug delivery system for doxorubicin. Methods: Sodium tripolyphosphate (TPP) and glutaraldehyde were used as physical (electrostatic) and chemical (covalent binding) cross-linker agents, respectively. MCNs were characterized by means of X-ray diffraction (XRD), Scanning electron microscopy (SEM), fourier transform infrared (FT-IR) spectroscopy and vibrating sample magnetometer (VSM). Scanning electron microscopy (SEM) indicated the formation of spherical...

Prevalence and Bilateral Occurrence of First Permanent Molar Caries in 12-Year-Old Students

Mostafa Sadeghi
Background and aims. Dental caries is one of the most prevalent chronic diseases in children and DMFT index is the most important quantitative factor for measuring tooth health. The purpose of the present study was to determine prevalence and bilateral occurrence of first permanent molar caries in 12-year-old Iranian students. Materials and methods. This cross-sectional study was carried out on 563 twelve-year-old students (307 boys and 256 girls), randomly selected from private and public schools...

Investigating the Mutagenic Effects of Three Commonly Used Pulpotomy Agents Using the Ames Test

Mohammad Samiei, Saeed Asgary, Malak Farajzadeh, Nasrin Bargahi, Majid Abdolrahimi, Usef Kananizadeh & Siavoush Dastmalchi
Purpose: The mutagenic potency of materials used in dentistry is of great concern. The Ames test is a bacterial reverse mutation assay, which is used to determine the mutagenicity potential of chemicals. In this study, the Ames test was used to compare mutagenic effects of three pulpotomy agents, namely, CEM cement, formocresol and ferric sulfate. Methods: TA100 strain of Salmonella typhimurium was used to evaluate mutagenicity of different concentrations of pulpotomy materials in the presence...

The Effect of Regular Moderate Exercise on miRNA-192 Expression Changes in Kidney of Streptozotocin-Induced Diabetic Male Rats

Hajar Oghbaei, Naser Ahmadi Asl, Farzam Sheikhzadeh, Mohammad Reza Alipour & Amir Mahdi Khamaneh
Purpose: The purpose of this study was to investigate the regular moderate exercise effect on the miR-192 expression changes in kidney of Streptozotocin- induced diabetic rats. Methods: Forty adult male Wistar rats were divided into four groups of 10, including Sedentary Control group, Healthy 60 days Exercise group, diabetic group and Diabetic 60 days Exercise. Diabetes was induced by injection of 60 mg/kg Streptozotocin and after 48 hour blood glucose levels higher than 250 mg/dl...

The Comparison of Efficacy of Adcortyl Ointment and Topical Tacrolimus in Treatment of Erosive Oral Lichen Planus

Arash Azizi & Shirin Lawaf
Background and aims. Oral lichen planus (OLP) is a common chronic mucocutaneous disease. Patients with atrophic and erosive lichen planus often have symptoms of soreness and need proper treatment. The main therapy of OLP has been the administration of topical or systemic corticosteroids. Potent topical corticosteroids have been increasingly prescribed in the treatment of erosive lichen planus. The purpose of this study was to compare the efficacy of adcortyl ointment (triamcinolone in orabase) with topical...

The Effect of Vitamin D and Calcium plus Vitamin D during Pregnancy on Pregnancy and Birth Outcomes: a Randomized Controlled Trial

Sakineh Mohammad-Alizadeh-Charandabi, Mojgan Mirghafourvand, Ameneh Mansouri, Moslem Najafi & Farzane Khodabande
Introduction: Evidence suggests a high prevalence of calcium and vitamin D deficiencies exists in both pregnant women and babies. Adequate intake of micronutrients has great importance especially during pregnancy and lactation period. Thus, the present study aimed at assessing the effect of vitamin D and calcium-vitamin D on pregnancy and birth outcomes (including duration of pregnancy, type of delivery and infant anthropometric indicators). Methods: A randomized, controlled, clinical, triple-blind trial conducted on 126 pregnant women...

Root Canal Configuration of Maxillary First Permanent Molars in an Iranian Population

Shahriar Shahi, Hamid Reza Yavari, Saeed Rahimi & Ali Ahmadi
Background and aims. It is critical to have a proper knowledge of the normal anatomy of the pulp and its variations for the success of endodontic treatment. The purpose of this study was to investigate variations in the root canal system of maxillary first permanent molars in an Iranian population. Materials and methods. In this study, 137 maxillary first molars were decalcified, dye-injected, cleared and studied. Results. The results demonstrated that 37.96% of the maxillary...

Reasons for Retreatment of Amalgam and Composite Restorations among the Patients Referring to Tabriz Faculty of Dentistry

Soodabeh Kimyai, Masomeh Mehdipour, Siavash Savadi Oskoee, Parnian Alizadeh Oskoee & Armin Abbaszadeh
Background and aims. Retreatment of existing restorations not only requires a lot of money and time but also there is a danger of weakening tooth structure and irritating the pulp. Since awareness of the reasons for the retreatment of teeth will save the teeth from possible future failure, the aim of this study was to assess the reasons for retreatment of amalgam and composite restorations in patients referring to Tabriz Faculty of Dentistry. Materials and...

Contamination of Dental Unit Water and Air Outlets Following Use of Clean Head System and Conventional Handpieces

Lida Toomarian, Sahand Rikhtegaran, Mehrnoosh Sadighi, Siavash Savadi Oskoee & Parnian Alizadeh Oskoee
Background and aims. Dental handpiece is a source of contamination because it is in constant touch with the oral cavity. Sterilization does not seem to be sufficient to prevent penetration of microorganisms into air and water lines of the unit, because negative pressure developed by valves (which are placed in water outlets) and post shut-off inertial rotation of handpiece result in water and debris being sucked into air and water outlets of dental unit. The...

Formulation of Gammaoryzanol-Loaded Nanoparticles for Potential Application in Fortifying Food Products

Serveh Ghaderi, Saeed Ghanbarzadeh, Zahra Mohammadhassani & Hamed Hamishehkar
Purpose: The field of nanoparticle delivery systems for nutrients and nutraceuticals with poor water solubility has attracted a great attention during the last decades. Methods: Ethyl cellulose (EC) based GO-loaded nanoparticles were prepared by solvent evaporation method. The effects of formulation parameters on nanoparticle size, encapsulation efficiency (EE%) and loading efficiency (LE%) were investigated. X-ray diffraction (XRD) and differential scanning calorimetry (DSC) techniques were used to investigate the crystalline behavior of GO and EC after...

Encapsulation of Vitamin A Palmitate in Nanostructured Lipid Carrier (NLC)-Effect of Surfactant Concentration on the Formulation Properties

Akram Pezeshki, Babak Ghanbarzadeh, Maryam Mohammadi, Isa Fathollahi & Hamed Hamishehkar
Purpose: Nanostructured lipid carrier (NLC) is a useful delivery system with high capacity for bioactive loading, and suitable stability for fortification of foods and beverages. The objective of the present work is to prepare vitamin A palmitate (vitA)-loaded NLC and to investigate surfactant concentration effect on physicochemical properties of prepared formulation. Methods: VitA-loaded NLC was prepared by hot homogenization method. Preciol as solid lipid, Octyloctanoate as liquid oil, and Poloxamer as surfactant were used to...

Nonsurgical treatment of maxillary deficiency using tongue guard appliance: a case report

Farzaneh Ahrari & Neda Eslami
BThe present report describes orthodontic treatment of a patient with skeletal Class III malocclusion and maxillary hypoplasia. To correct the retrusive maxilla, the treatment plan included an intra-oral removable device. It had the advantages of good patient cooperation, ease of construction and effective modification. Forward growth of the maxilla, minimal downward and backward rotation of the mandible and improved facial profile esthetics were achieved.

The Impact of Ergonomically Designed Workstations on Shoul­der EMG Activity during Carpet Weaving

Majid Motamedzade, Davood Afshari & Ali Reza Soltanian
Background: The present study aimed to evaluate the biomechanical exposure to the trapezius muscle activity in female weavers for a prolonged period in the workstation A (suggested by previous studies) and workstation B (proposed by the present study). Methods: Electromyography data were collected from nine females during four hours for each ergonomically designed workstation at the Ergonomics Labora­tory, Hamadan, Iran. The design criteria for ergonomically designed workstations were: 1) weaving height (20 and 3 cm...

A study of parallelism of the occlusal plane and ala-tragus line

Katayoun Sadr & Makan Sadr
Background and aims. Orientation of the occlusal plane is one of the most important clinical procedures in prosthodontic rehabilitation of edentulous patients. The aim of this study was to define the best posterior reference point of ala-tragus line for orientation of occlusal plane for complete denture fabrication. Materials and methods. Fifty-three dental students (27 females and 26 males) with complete natural dentition and Angel's Class I occlusal relationship were selected. The subjects were photographed in...

Effect of different disinfectants on Staphylococcus aureus and Candida albicans transferred to alginate and polyvinylsiloxane impression materials

Fereydoun Parnia, Ali Hafezeqoran, Elnaz Moslehifard, Farhang Mahboob, Mohammadreza Nahaei & Mohammad Akbari Dibavar
Background and aims. Several products have been marketed for disinfecting impression materials. The present study evaluated the effect of Deconex, Micro 10, Alprocid and Unisepta Plus sprays on Staphylococcus aureus and Candida albicans transferred to alginate and polyvinylsiloxane impression materials. Materials and methods. A total of 180 impressions of a maxillary model (90 alginate and 90 polyvinylsiloxane impressions) were taken for the purpose of this in vitro study. Half of the impressions were infected with...

Electromyographic Activity of Soleus and Tibialis Anterior Mus­cles during Ascending and Descending Stairs of Different Heights

Ali Eteraf Oskouei, Nehzat Ferdosrad, Iman Dianat, Mohamad Asghari Jafarabadi & Jalil Nazari
Background: The aim of this study was to evaluate the electromyographic (EMG) activity of the two leg muscles (Tibialis anterior [TA] and Soleus [SOL]) during ascending and descending stairs with different heights (10 cm, 15.5 cm and 18 cm). Methods: Eight­een female university students aged between 20 and 36 yr participated in the study. Data were collected using a ME6000 Biomonitor EMG System (revision MT-M6T16-0) and surface electrodes. Results: The EMG activity of the SOL...

Symptomatic elongated styloid process or Eagle’s syndrome: a case report

Hossein Shahoon & Camellia Kianbakht
Elongation of the styloid process or stylohyoid ligament calcification is a well recognized finding of dental practice, and an incidence of 4 to 30 percent has been reported on radiographs. Rarely, complete mineralization of the stylohyoid ligament or elongation of styloid process has been associated with difficulties in intubation and significant clinical symptoms, which is termed Eagle’s syndrome, and it exhibits dull or sharp intermittent pain felt along the glossopharyngeal nerve that is located in...

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