objectives: tooth loss appears to have an important role in the loss of mastication and esthetics. the aim of this systematic review was to investigate the prevalence of tooth loss and edentulism in the iranian population. methods: studies reviewed in this article were primarily identified via search of the online bibliographic databases including pubmed and iranian biomedical journals, by usin...

conclusions it is likely that learning social skills in adolescents with deafness would improve their sense of competence, and emotional well being. results the intervention led to significant improvement in total perceived competence scores of adolescents with deafness (p < 0.001) as well as in three domains of socio-emotional competence (p = 0.003), communication competence (p < 0.001), and s...

O ne of the most important concepts in public health today is that many cancers are avoidable through exercise, eating right, and not smoking. What’s more, death rates for the 10 most common cancers have declined steadily, reflecting treatment advances. But even so, millions of people hold fatalistic views on cancer. Fatalism has been shown repeatedly to thwart screening and treatment; those wh...

introduction: hearing loss is one of the most common occupational diseases. in most workplaces, workers are exposed to noise and solvents simultaneously, so the potential risk of hearing loss due to solvents may be attributed to noise.  in this study we aimed to assess the effect of exposure to mixed aromatic solvents on hearing in the absence of exposure to hazardous noise.   materials and met...

Introduction: Children learn to communicate by hearing sounds. If there is hearing loss, the cognitive and speaking abilities and language learning will deteriorate. Early detection and intervention are important factors in the successful treatment of hearing loss in children. Hearing loss (HL) is divided into two main groups: conductive hearing loss (CHL) and sensorineural hearing loss (SNHL)...

introduction: serum anti endothelial cell antibodies (aecas) play a prominent role in idiopathic sensorineural hearing loss (snhl) in that they induce vascular damage (immune mediated).the of the current study is  to compare aecas in serum and perilymphatic .uid of idiopathic snhl children (<15y) undergoing cochlear implant surgery.methods: this was a cross sectional study performed in the coch...

analyzing the nonlinear vibration of beams is one of the important issues in structural engineering. according to this, an impressive analytical method which is called modified iteration perturbation method (mipm) is used to obtain the behavior and frequency of a cantilever beam with geometric nonlinear. this new method is combined by the mickens and iteration methods. moreover, this method don...