Bone Abstracts

In bone marrow, bone marrow stromal cells (BMSCs) have the capacity to differentiate into osteoblasts and adipocytes. Onset of osteoporosis with age stems in part from the enhanced bone marrow adipogenesis that represses osteogenesis. In this study, we demonstrate that disruption of nuclear factor I-C (NFI-C) impairs osteoblast differentiation and bone formation, and increases bone marrow adipocytes. Interestingly, NFI-C controls postnatal bone formation but does not influence...

Paget’s disease of bone is a condition where the process of bone remodeling is disrupted; Its primary event is an increased bone resorption followed by a subsequent reactive bone formation. The disease is most common in central Europe, the United Kingdom, Australia, and New Zealand. It is also found, though with lower incidence, in southern Europe, Scandinavia, and the United States. It is extremely rare in East Asian countries, especially in Korea, Japan, China, the Midd...

Objective: The use of high-impact weight bearing physical activities has been accepted as a means to increase osteogenic effects on bone. Studies in adolescents found that physical activity could counteract the detrimental effects on bone associated with television time in boys and time spent studying in girls. Our aim was to test the effects of the percent of time spent in moderate plus vigorous activities (ModVig) and sitting (SIT) on bone health. We hypothesized that high M...

Introduction: Most reports focused on clinical advantages of intervertebral cages; only a few studies reviewed the complications. As one of the major complications, cage migrating into vertebral body or spinal canal may result in disastrous consequence. Multiple risk factors may result in cage migration, such as geometric design of cage, surgical technique, the bone quality and post-operative protection. The following is a presentation of nine patients with migrated cage.<...

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Low body mass index (BMI) or body weight is a well-known risk factor for osteoporosis and fragility fractures. However, the relative contribution of lean mass and fat mass on bone health, i.e. fragility fractures is inconclusive.We elucidated the relative contribution of lean and fat mass on fracture risk by group analysis in Korean men and women. This was an ongoing prospective community-dwelling cohort study at Ansung in Korea, begun in 2001. We includ...

Introduction: Low-magnitude, high-frequency (LMHF) mechanical stimuli lead to enhance bone formation and decrease resorption. This study aimed to investigate the effect of vibration on the bone loss induced by inflammatory cytokine, lipopolysaccharide (LPS).Methods and designs: Balb-C mice were administered to LPS (5 mg/kg) with two i.p. injections on days 0 and 4, while sham control group was injected with 400 μl of water for injection without LPS....

Purpose: To investigate the effect of enamel matrix derivative (Emdogain) on the attachment, growth behavior and the genetic effect of human gingival fibroblasts (HGF) cultured on zirconium disc surfaces.Materials and methods: HGF cells were cultured on i) zirconium discs without enamel matrix derivative (EMD), ii) zirconium discs with EMD 25 μg/ml, and iii) zirconium discs with EMD 100 μg/ml. The cell proliferation activity was evaluated throu...

Indoxyl sulfate (IS) is one of a number of protein-bound uremic toxins that accumulate in patients with chronic kidney disease. Current conventional hemodialysis is ineffective at removing this toxin. Although IS may impair osteoblast function and induce abnormalities of bone turnover or arthropathy, the effects on knee joint tissue by IS has not been investigated yet. The present studies have been carried out to test the IS effects on synovial fibroblasts, meniscal fibrochond...

Objectives: To find the predicting factors for bone density in premenopausal women.Methods: Two hundred and forty-five premenopausal women without factors that can cause secondary osteoporosis were analyzed. Age, height, weight, change of height from peak height, history (Hx) of fracture, family Hx of hip or other fracture, Hx of estrogen use, calcium or vitamin D supplementation, smoking and previous Hx of amenorrhea more than 3 months were questioned. ...