objective: periodontal diseases are common in the society and some researchers suggested an association between rheumatoid arthritis (ra) and periodontal diseases. the present study was carried out to evaluate the so-called association in iranian adults. materials and methods: in this case-control study, the samples were recruited from patients referred to loghman hospital, tehran, during 2004-...

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background : noise exposure is the most frequent occupational factor which may increase the risk of work-related injuries. the purpose of this study was to estimate the association between occupational injuries and noise exposure as well as hearing loss. methods : this study was conducted from april 2008 to march 2009 on 1062 workers in the tabriz tractor manufacturing plant. sound pressure lev...

conclusions this intervention offers a practical approach for treatment of patients with nafld with diet therapy. patients and methods forty four patients with nafld received a diet including a 500 to 1000 kcal per day intake reduction as30% fat, 15% protein, and 55% carbohydrate for six months. anthropometric parameters, alanine aminotransferase (alt), aspartate aminotransferase (ast), gamma g...

background: recurrent pregnancy loss is (rpl) a heterogeneous condition. while the role of acquired thrombophilia has been accepted as an etiology for rpl, the contribution of specific inherited thrombophilic gene polymorphisms to the disorder has been remained controversial. methods: one hundred women with a history of two or more consecutive abortions and 100 women with at least two live birt...

mutations in the gjb2 gene at the dfnb1 locus on chromosome 13q12 are associated with autosomal recessive non syndromic hearing loss (arnshl) in many populations. a single mutation, at position 35 (35delg) accounts for approximately 30-63% of mutations in white populations with a carrier frequency of 1.5-2.5% in most european, north american and mediterranean populations. in this study we have ...

original article   introduction: direct sunlight and increased heat load influence mental and physical health of workers negatively and result in performance impairment. activity reduction is a natural body response to increase in internal body temperature, and a compensatory mechanism to make body balanced. this study was carried out to estimate productivity loss due to heat exposure among ira...

improvements in science and technology and the use of modern machinery in manufacture have led to increase in the number of workers exposed to hazardous agents including noise. this study evaluated the effects of occupational noise on hearing loss and blood pressure in welders after 4 years.in this cohort study, all of the welders working at one of neyshabur's water heater producing factories w...

background: hearing loss due to chronic otitis media is common. the purpose of this study was to evaluate hearing before and after canal wall up, canal wall down mastoidectomy and tympanoplasty. methods: from 2004 to 2007, all patients with chronic otitis media who were admitted at the department of otolaryngology, babol medical university were studied. for 126 patients' canal wall up, can...

introduction: after presbycusis, noise-induced hearing loss is the second most common cause of acquired hearing loss. numerous studies have shown that high-intensity noise exposure increases free radical species; therefore, use of antioxidants to detoxify the free radicals can prevent cellular damage in the cochlea. we studied the potential hearing protective effect of different doses of ascorb...