mandibular defects may result from many conditions such as trauma, inflammatory diseases and tumors. there are rare cases reported in the literature that have demonstrated spontaneous bone regeneration after resection of the mandible. several factors such as age, preservation of the periosteum and genetics seem to influence spontaneous bone regeneration capacity in individuals. evaluation of th...

background: osteoporosis is a major public health concern around the world. it has been shown that bone mineral den­sity is correlated to anthropometric measures like height and weight, but this association may vary depending on ethnic and environmental factors. the aim of this study was to identify probable relations between anthropometric measures and bone mineral density. methods: in this po...

introduction we report a case of non-:union: with severe shortening of the femur following diaphysectomy for chronic osteomyelitis. case presentation a boy, aged 16 years presented with a dangling and excessively short left lower limb. he was using an elbow crutch in his right hand to help him walk. he had a history of diaphysectomy for chronic osteomyelitis at the age of 9. examination reveale...

background: hematological abnormalities are a common complication of hiv infection and occur in all stages of the infection. these abnormalities increase as the disease advances. we aimed to evaluate the diagnostic utility of bone marrow sampling in hiv-positive patients. methods: 40 hiv-infected individuals were screened for hematological abnormalities. investigations such as iron studies, hem...

osteoporosis is considered as an important public health problem especially in postmenopausal women. there are some hypotheses support the contributory effect of pregnancy and lactation on osteoporosis later in life. high calcium demand during pregnancy and lactation and low estrogenic state support those hypotheses. numerous studies have investigated on the issue but there is no consensus abou...

a three-month-old male native puppy with lameness, metaphyseal swelling, pain, depression,inappetence and variable pyrexia was diagnosed as having hypertrophic osteodystrophy (hod) based onradiologic examination. the hemogram and biochemical profiles were within normal limits. radiologicexamination revealed a radiolucent zone in the metaphyses and a radiopaque band near the physes of theappendi...

aligned and random nanocomposite nanofibrous scaffolds were electrospun from polycaprolactone (pcl), poly (vinyl alcohol) (pva) and hydroxyapatite nanoparticles (nha). the morphology and mechanical characteristics of the nanofibers were evaluated using scanning electron microscopy and tensile testing, respectively. scanning electron microscopy revealed fibers with an average diameter of 123 ± 3...

background: bone tissue engineering requires materials that are biocompatible, mechanically suited for bone function, integrated with the host skeleton, and support osteoinduction of the implanted cells for new bone formation. the aim of this study was to compare the osteogenic potential of xenograft with hydroxyapatite/β- tricalcium phosphate (ha/β-tcp) scaffold. methods: new zealand rabbits (...

Leukemia is the most common childhood cancer and accounts for 30-40% of all malignancies. A retrospective review  was performed of the hospital records of 9 children, 6 boys and 3 girls, aged  from 2.5 to 15 years with ALL initially referred to Nemazee hospital Nuclear medicine center for whole body bone scanning between 2000 and 2002. Bone marrow pathology established ALL (L1) in two and ALL (...

Demineralized bone matrix has been successfully commercialized as an alternative bone graft material that not only can function as filler but also as an osteoinductive graft. Numerous studies have confirmed its beneficial use in clinical practice. Heterotopic ossification after internal fixation combined with the use of demineralized bone matrix has not been widely reported. In this paper we de...