context the aim of this review was to examine evidences for the association between smoking and periodontal disease, to discuss possible biological mechanisms whereby smoking may adversely affect the periodontium, and to consider the effect of smoking on periodontal treatment. evidence acquisition a web-based search in pubmed and google scholar was performed to identify publications regarding t...

fasting is one of the important religious practices of muslims, in which the individuals abstain from eating and drinking from dawn to sunset. fasting is not obligatory or even not allowed, in case it causes health problems to the fasting individual. rheumatic diseases are a major group of chronic diseases which can bring about numerous problems while fasting. the aim of this article is to revi...

Dynamic mutations involve expansion of the number of repeat units consisting of three or more nucleotides in tandem (i.e. adjacent to one another) present in a gene or in its neighborhood. These repeats may occur in different genes and may code for different aminoacids. According to expansions sizes, it is possible to have unaffected individuals that are carriers of a pre-mutation. Instability ...

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spontaneous adrenal hematoma is a very rare condition and its prevalence has been reported to be about 1% in previous studies. although various causes have been proposed to explain its incidence in existing case reports, the etiology and pathology of this condition is still not known. the present study presents a case of spontaneous adrenal hematoma in a pregnant 31 year old woman without histo...

since the mid-19 th century, human activities have increased greenhouse gases such as carbon dioxide, methane, and nitrous oxide in the earth's atmosphere that resulted in increased average temperature. the effects of rising temperature include soil degradation, loss of productivity of agricultural land, desertification, loss of biodiversity, degradation of ecosystems, reduced fresh-water resou...

inflammatory bowel disease, coronary artery disease, cerebrovascular disease, hypertension, diabetes, tumours, are exam­ples of chronic degenerative diseases that have a high prevalence in developed nations. these chronic-non-communicable dis­eases have multifactorial aetiologies that considered to be caused by the interaction of environmental risk factors with multi­ple predisposing genes. gen...

introduction: pseudoexfoliation syndrome (pxs) occurs due to the deposition of extracellular fibrillar materials on the anterior chamber of the eye. this syndrome has been considered to be part of a systemic disease with the potential involvement of the inner ear called sensoroneural hearing loss (snhl).  in this study, we aimed on evaluating snhl within pxs patients in iran to compare them wit...