osteoporosis (op) is a frequent complication of rheumatoid arthritis (ra) and longitudinal studies have documented increased rate of bone loss in ra patients. to determine the frequency of low bone mass as well as the influence of disease duration and corticosteroid use on bone mass in patients with ra, 88 patients with ra and 112 age matched controls were studied. bone densitometry was perform...

osteosarcoma (os) is the eighth common cancer of childhood and its incidence is 4 cases in one million in children younger than 14. facial os incidence is estimated between 8 and 10% of os cases. the main etiology of os is unknown, but various predisposing factors are proposed such as radiation, radiotherapy, some benign bone diseases like paget’s disease or fibrous dysplasia. there is a 5-year...

intraosseous ganglia can affect the carpal bones of the hand and must be considered in the differential diagnosis of wrist pain. a 38-year-old female presented with a 14-month history of left wrist pain and a radiolucent cystic lesion was seen computed tomography (ct) scanning. characteristic radiographic findings of a cyst in association with a fine sclerotic rim was apparent. we report an unu...

background: understanding the differences in genetics of malignancies is crucial for therapeutic decisions. this systematic review was conducted to evaluate the current evidence on genetics of bone tumors in the context of pediatric cancer. material and methods: we performed a systematic review of the literature published on genetics of pediatrics bone tumors, using pubmed, google scholar, scie...

introduction : osteon® is an alloplastic material containing 70% hydroxyapatite and 30% β-tcp. calcitonin, a hormone produced by the thyroid gland, not only prevents bone resorption by reducing both the number and the activity of osteoclasts, but also stimulates bone formation. considering the favorable effects of calcitonin on bone formation, we hypothesized that the addition of calcitonin to ...

various biological bone g rafts have been used for osteogenes i s , osteoconduction and even osteoinduction, but due to systemic influences and local factors, the outcome of successful incorporation of a bone graft has not been satisfactory. this study was therefore conducted on 15 clinically healthy adult dogs between 1 to 3 years of age weighing 20 to 30 kg to evaluate the effect of bone ceme...

background patients with thalassemia major and intermedia are susceptible to osteopenia and osteoporosis. the mechanism of osteoporosis in these patients is multifactorial. transfusion related iron overload in endocrine organs leads to impaired growth hormone secretion, diabetes mellitus, hypothyroidism, hypoparathyroidism, lack of sex steroids and vitamin d deficiency that contribute to impair...

bone matrix gelatin (bmg) has been used for bone induction intramuscularly and subcutaneously by many investigators since 1965. more recently, some of the researchers have used bmg particles for bone repair and reported various results. in present study for evaluation of bone induction and new bone formation in parital defects, bmg particles were used in five groups of rats. the bmg was prepare...

chronic recurrent multifocal osteomyelitis (crmo) is an inflammatory bone disease usually affecting children. a 9-year old boy presented with recurrent lower extremities pain and discomfort lasting for two years. in every time, symptoms vanished after several weeks. the patient received antibiotics only in one period of bone pain. in other occasions the patient didn’t received any antibiotics. ...