Bone Abstracts

Objective: It was proved that expansive pedicle screw (EPS) could significantly enhance immediate screw stability through mechanical expanding and compressing. However, there were little researches on growth of bone tissue around screw and dynamic screw stability in vivo in osteoporotic vertebrae. This study was designed to evaluate growth and microstructure of bone tissue around screw and fixation strength of screw in osteoporotic sheep lumbar vertebrae.<p class=...

Osteoclasts are cells specialized for resorption of calcified tissue. Osteoclasts are formed from precursor cells of monocyte lineage under the control of receptor activator of nuclear factor kappaB ligand (RANKL). Mitogen- and stress-activated protein kinase 1 (MSK1) has been reported to be an important regulator of immune response and mitogenic signaling. In this study, we for the first time found that MSK1 was activated by RANKL in osteoclast precursor, bone marrow macropha...

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...

Background: Asian-specific prediction model for estimating the individual risk of osteoporotic fracture was rare. We aimed to develop a Korean fracture risk prediction model using clinical risk factors and assess external validity of the final model.Methods: A total of 718,306 Korean men and women aged 50–90 were followed for 7 years in national system based cohort study. Fifty percent were randomly assigned to the development dataset and 50% to the...

Introduction: The purpose of this prospective study is to investigate whether bisphosphonate-based anti-osteoporosis medication affects fracture healing and clinical outcomes of conservatively treated osteoporotic spinal fractures (OSFs).Method: A total of 105 patients who were diagnosed with acute OSFs were prospectively enrolled. According to their previous medication history, the patients were allocated into group I (n=39, no history of bisph...

Introduction: The purposes of this study were to evaluate the trends in the incidence and mortality of hip fracture between 2008 and 2012, and predict the number of hip fractures in Korea up to 2025, using nationwide claims data.Methods: Nationwide claims data managed by the National Health Insurance Service (NHIS) was used to identify patients with hip fracture. All new visits or admissions to medical institutes for hip fracture aged 50 years or more be...

Introduction: Vertebral fracture has been recognized as a major health concern. Our purposes were to evaluate the trends in the incidence and mortality of vertebral fracture between 2008 and 2012 and predict the number of vertebral fracture that will occur in Korea up to 2025, using nationwide data from the National Health Insurance Service (NHIS).Method: A nationwide data set was evaluated to identify all new visits to medical institutes for vertebral f...

Objectives: Osteonecrosis (ON) and decline of bone mineral density (BMD) are serious side effects during and after treatment of childhood acute lymphoblastic leukemia (ALL). It is unknown whether ON and low BMD co-occur in the same patients, and whether these two osteogenic side-effects can mutually influence each other’s development.Methods: BMD and the incidence of symptomatic ON were prospectively assessed in a national cohort of 466 patients wit...

Background: Familial hypocalciuric hypercalcemia (FHH) is a rare autosomal dominant condition with an estimated prevalence of 1 in 78,000. The commonest cause of FHH is inactivating mutations of the calcium-sensing receptor (CASR) gene, with the rest mostly caused by missense mutations of the GNA11 and AP2S1 genes. FHH is characterized by persistent mild-to-moderate hypercalcemia, hypocalciuria with calcium-creatinine clearance ratio ⩽0.01. The disease runs a benign cou...

Objective: Chondrolysis, chondrocyte apoptosis, and local inflammation are described to exacerbate osteoarthritis development. We therefore aimed to investigate the effect of adrenomedullin (ADM) and its truncated peptide (22–52ADM) on in vitro and in vivo models. Both have exhibited anti-apoptotic and anti-inflammatory properties in collagen-induced arthritis (CIA) in mice.Methods: In normoxia or hypoxia (physiological condition),...