background: bisphosphonates (bps) are used extensively for managing the osteoporosis. there are some controversies on atypical fractures of femur that associated with increase in cortical thickness (ct) and bps' use. in this study, the effects of alendronate consumption were studied on femoral ct as a predictor for atypical fracture.   methods: forty nine post-menopausal women aged 50-70 years ...

Osteoid osteoma is a benign osteoblastic bone tumor that is usually encountered in adolescent and young adult males (1). The typical findings of osteoid osteoma in a long tubular bone are the presence of a small, well-defined radiolucent lesion with or without mineralization within the cortex, associated with cortical thickening and reactive sclerosis (2). Osteoid osteomas can be categorized ac...

objective: etching of enamel and dentin is an important step in restoration of teeth with composite resin ensuring the retention of restoration and decreasing microleakage. this in vitro study sought to compare the effects of kimiya and etch-rite acid etchants on the microleakage of composite restorations.   methods: this experimental study was conducted on 30 sound human molar teeth. class v c...

statement of problem: impacts and accidents are considered as the main fac- tors in losing the teeth, so the analysis and design of the implants that they can be more resistant against impacts is very important. one of the important nu- merical methods having widespread application in various fields of engineering sciences is the finite element method. among its wide applications, the study of ...

In this study, we present the ultrasound imaging features of lymph nodes arising in regional node chain after first or second dose Pfizer-BioNTech COVID-19 vaccine. Ipsilateral lymphadenopathy adjacent to vaccine injection site is an extremely rare but expected adverse reaction following vaccination. Although axillary more common, cases supraclavicular have also been reported widespread vaccina...

Metabolic bone diseases such as osteoporosis usually cause a decrease in bone mass and a deterioration of bone microarchitecture leading to a decline in bone strength. Methods to predict bone strength in patients are currently based on bone mass only. It has been suggested that an improved prediction of bone strength might be possible if structural changes are taken into account as well. In thi...

Infants with low birth weight are at increased risk of perinatal brain injury. Disruption of normal cortical development may have consequences for later motor, behavioural and cognitive development. The aim of this study was to measure cerebral cortical thickness, area and volume with an automated MRI technique in 15-year-old adolescents who had low birth weight. Cerebral MRI for morphometric a...