هدف: با توجه به رشد روزافزون آموزش شیوه مجازی و ویژه در شرایط گسترش پاندمی کرونایروس، نقش اساسی مدیریت کلاسی ارتقا کیفیت باید مورد قرار گیرد این پژوهش هدف تدوین مدل رابطه علّی هدفمند کلاس وضعیت روان‌شناختی پیامدهای تحصیلی دانشجویان انجام شد. روش: روش بر حسب هدف، کاربردی ماهیت از نوع توصیفی - همبستگی بود. جامعه آماری مشتمل انواع مقاطع دانشگاه­ های دولتی پیام نور شهر تهران نمونه اساس جدول مورگان ب...

objective: despite the advantages of esthetic posts, lack of studies on their fracture resistance has limited their clinical use. this study aimed to compare the effect of two types of esthetic posts namely zirconia and zirconia enriched glass fiber composite posts on fracture resistance of endodontically treated teeth against compressive forces.   methods: this in vitro study was conducted on ...

objective: the purpose of this study was to evaluate and compare the effect of storage time and conditions on dimensional stability of acrylic patterns. materials and methods: in this in vitro study, a cylindrical shaped metallic post-core was fabricated. impressions were made from this metallic model and 30 samples were prepared with duralay acrylic resin. the specimens were divided into three...

introduction: although patients do not experience sever pain after laparoscopic surgery, most of them experience acute or chronic pain afterward. while conventional pain killers including nsaid and narcotics in laparoscopic surgery have specific side effects, their application is inevitable. this study compares the efficacy of local anesthetic drugs and conventional pain killers in post-operati...

conclusion tf-cbt for patients with acute stress disorder has been shown to be efficacious in reducing the likelihood of subsequent development of ptsd. despite the impressive level of empirical support for tf-cbt, many professionals remain unaware of its advantages and many children and parents who could benefit do not receive such treatment. further more, in iran, there may not yet be any tf-...

abstract our patient was a 43-year-old woman with a suboccipital headache and pain in the upper cervical region from 3 years ago with a progressive generalized weakness in the last 3 months. neuroimaging study showed a dumbell shaped lesion with compression of the spinal cord in the cervical region that was identified as a neurinoma. the tumor had been completely removed by surgery but after th...

sepsis and septic shock are among mortality causes following major surgeries. the charlson co-morbidity index consists of 19 weighted categories related to chronic health which measures the burden of co-morbidity. the goal of this study was to determine the incidence of postoperative sepsis in patients underwent gynecological and gastrointestinal cancer surgeries and predictive role of charlson...

purpose: the aim of this study was to compare the effects of a) a flame heated endo plugger, b) gatesglidden drills and c) gpx drills on the apical seal for the purpose of post space preparation. materials & methods: the crowns of sixty six extracted maxillary central teeth were removed from cej by a diamond disc and the root canals were prepared and obturated with guttapercha and sealer (ah26)...

background post-term pregnancy is an important factor in perinatal mortality and morbidity. generally, to reduce perinatal mortality in pregnancy, the delivery is done before adverse perinatal morbidity occurs. to prevent prolonged pregnancy, labor is induced with chemical drugs and complementary therapies. due to the side effects and contraindications of chemical medicine, the use of herbs has...