Abstract:
:The correlation between bone mineral density and vertebral strength is not based on mechanical principles and thus the method cannot reflect the effects of subtle geometric features and densitometric inhomogeneities that may substantially affect vertebral strength. Finite element models derived from quantitative computed tomography (QCT) scans overcome such limitations. The overall goal of this study was to establish that QCT-based "voxel" finite element models are better predictors of vertebral compressive strength than QCT measures of bone mineral density with or without measures of cross-sectional area. QCT scans were taken of 13 vertebral bodies excised from 13 cadavers (L1-L4; age: 37-87 years; M = 6, F = 7) and used to calculate bone mineral density (BMD(QCT)). The QCT voxel data were converted into linearly elastic finite element models of each vertebra, from which measures of vertebral stiffness and strength were computed. The vertebrae were biomechanically tested in compression to measure strength. Vertebral strength was positively correlated with the finite element measures of strength (r(2) = 0.86, P < 0.0001) and stiffness (r(2) = 0.82, P < 0.0001), the product of BMD(QCT) and vertebral minimum cross-sectional area (r(2) = 0.65, P = 0.0008), and BMD(QCT) alone (r(2) = 0.53, P = 0.005). These results demonstrate that highly automated "voxel" finite element models are superior to correlation-based QCT methods in predicting vertebral compressive strength and therefore offer great promise for improvement of clinical fracture risk assessment.
journal_name
Bonejournal_title
Boneauthors
Crawford RP,Cann CE,Keaveny TMdoi
10.1016/s8756-3282(03)00210-2subject
Has Abstractpub_date
2003-10-01 00:00:00pages
744-50issue
4eissn
8756-3282issn
1873-2763pii
S8756328203002102journal_volume
33pub_type
杂志文章相关文献
BONE文献大全abstract:OBJECTIVES:The present study was motivated by the fact that bone regeneration in the compromised vascular microenvironment of T2DM is challenging and the factors that determine the adverse bone regeneration outcomes are poorly understood. For this purpose the effect of T2DM on osteogenic and angiogenic healing potentia...
journal_title:Bone
pub_type: 杂志文章
doi:10.1016/j.bone.2018.04.009
更新日期:2018-07-01 00:00:00
abstract::Iliac crest bone biopsies from 62 patients (42 women, 20 men; median age 59 years; range 17-79 years) with primary hyperparathyroidism (PHP) were examined. Static and structural parameters were compared with 30 age- and sex-matched normal controls. Eighteen sex-matched younger controls were used for evaluation of the ...
journal_title:Bone
pub_type: 杂志文章
doi:10.1016/8756-3282(93)90207-q
更新日期:1993-09-01 00:00:00
abstract::This study is designed to test how intermittent application of prostaglandin E2 (PGE2) and risedronate (Ris) alone or in combination acts on the cancellous bone mass in estrogen-deficient rats. Sprague-Dawley rats were ovariectomized (ovx) or sham-ovx'd at 6 months of age. PGE2 (6mg/kg/d), Ris (5 micrograms/kg/twice a...
journal_title:Bone
pub_type: 杂志文章
doi:10.1016/8756-3282(95)00305-w
更新日期:1995-10-01 00:00:00
abstract::Runx2 and Axin2 regulate skeletal development. We recently determined that Axin2 and Runx2 molecularly interact in differentiating osteoblasts to regulate intramembranous bone formation, but the relationship between these factors in endochondral bone formation was unresolved. To address this, we examined the effects o...
journal_title:Bone
pub_type: 杂志文章
doi:10.1016/j.bone.2014.06.022
更新日期:2014-09-01 00:00:00
abstract::On the basis of studies with bone-seeking isotopes, it is generally believed that the metabolic activity of osteoblasts of the trabecular bone is greater than that of the osteoblasts of the cortex. This implies that the oxidative activity, which provides the energy for biosyntheses, will also be greater in the former ...
journal_title:Bone
pub_type: 杂志文章
doi:10.1016/8756-3282(89)90061-6
更新日期:1989-01-01 00:00:00
abstract::The deformation mechanism of bone at different hierarchical levels has been of wide interest. The important features of bone, its anisotropy and orientation dependent deformation are equally important, which have also gained a long run discussion. Most of the studies are concentrated on protein-rich collagen fibres an...
journal_title:Bone
pub_type: 杂志文章
doi:10.1016/j.bone.2009.01.394
更新日期:2009-06-01 00:00:00
abstract::Exercise during growth can be important for attaining optimal bone mass. High-intensity long-duration protocols, however, can have detrimental effects on immature bone morphology and mechanics. The underlying mechanisms are poorly understood. Here, we quantified the mechanical environment of the middiaphyseal rooster ...
journal_title:Bone
pub_type: 杂志文章
doi:10.1016/s8756-3282(99)00256-2
更新日期:2000-02-01 00:00:00
abstract::Hypertension and osteoporosis are two major chronic diseases affecting the elderly. A cross-sectional study of 3887 Chinese men (n = 1958) and women (n = 1929) was used to explore the association between angiotensin converting enzyme inhibitor (ACEI) use and bone mineral density (BMD). The participants were aged 65 ye...
journal_title:Bone
pub_type: 杂志文章
doi:10.1016/j.bone.2005.09.011
更新日期:2006-04-01 00:00:00
abstract:OBJECTIVE:Selenium deficiency is a risk factor for Kashin-Beck Disease (KBD), an endemic osteoarthropathy. Although promoter hypermethylation of glutathione peroxidase 3 (GPX3) (a selenoprotein) has been identified in several cancers, little is known about promoter methylation and expression of GPX3 and their relation ...
journal_title:Bone
pub_type: 杂志文章
doi:10.1016/j.bone.2018.08.017
更新日期:2018-12-01 00:00:00
abstract::Osteopontin (OPN) gene expression and alkaline phosphatase activity were evaluated in the epiphyseal growth plates of normal chickens and in diet-induced tibial dyschdroplasia (TD)-afflicted chickens. In the normal growth plate, OPN gene was expressed by a) cells of the subperichondrial zone surrounding the articular ...
journal_title:Bone
pub_type: 杂志文章
doi:10.1016/8756-3282(94)00048-5
更新日期:1995-04-01 00:00:00
abstract::Tankyrase is a poly (ADP-ribose) polymerase that leads to ubiquitination and degradation of target proteins. Since tankyrase inhibitors suppress the degradation of AXIN protein, a negative regulator of the canonical Wnt pathway, they effectively act as Wnt inhibitors. Small molecule tankyrase inhibitors are being inve...
journal_title:Bone
pub_type: 杂志文章
doi:10.1016/j.bone.2017.10.017
更新日期:2018-01-01 00:00:00
abstract::This study describes the early interface reaction of cancellous bone to a nanocrystalline hydroxyapatite cement containing type I collagen (HA/Coll) and its modifications with sodium citrate (CI), calcium carbonate (CA), phosphoserine (P) and phosphoserine plus RGD-peptide (RGD). Cylindrical implants of HA/Coll and it...
journal_title:Bone
pub_type: 杂志文章
doi:10.1016/j.bone.2006.11.019
更新日期:2007-04-01 00:00:00
abstract::We have previously found BMD and fracture risk to be significantly associated with the MTHFR (C677T) polymorphism in healthy postmenopausal women in the first years after menopause. Since then, other cohort studies have suggested that sufficient intake of riboflavin and/or folate may have the potential to prevent deve...
journal_title:Bone
pub_type: 临床试验,杂志文章,多中心研究,随机对照试验
doi:10.1016/j.bone.2004.12.014
更新日期:2005-03-01 00:00:00
abstract::Hormone replacement therapy is effectively used to prevent postmenopausal bone loss. Variation in response to the therapy is, however, frequently seen. In addition, the direct effects of sex steroids on isolated human bone marrow stromal cells have been reported to vary depending on the donor, but the biological mecha...
journal_title:Bone
pub_type: 杂志文章
doi:10.1016/j.bone.2006.05.003
更新日期:2006-11-01 00:00:00
abstract::An emerging strategy in the regeneration and repair of bone is to use stem cells, including bone marrow mesenchymal stem cells, which are the most investigated and reliable source for tissue engineering, as well as circulating skeletal stem/progenitor cells, which are receiving abundant attention in regenerative medic...
journal_title:Bone
pub_type: 杂志文章,评审
doi:10.1016/j.bone.2008.05.001
更新日期:2008-09-01 00:00:00
abstract::During our survey of herbs looking for activity on bone metabolism, we found that the dried leaves of sage strongly inhibit bone resorption. Therefore, we investigated several common herbs rich in essential oils (sage, rosemary, and thyme) and essential oils extracted from these herbs and other plants (oils of sage, r...
journal_title:Bone
pub_type: 杂志文章
doi:10.1016/s8756-3282(03)00027-9
更新日期:2003-04-01 00:00:00
abstract::Histomorphometric changes in the trabecular structure of the principal compressive stress region in the femur in patients with osteoarthritis and fracture of the femoral neck are described. Femoral heads were obtained from patients who had surgery for the treatment of femoral neck fracture or total hip replacement for...
journal_title:Bone
pub_type: 杂志文章
doi:10.1016/8756-3282(85)90044-4
更新日期:1985-01-01 00:00:00
abstract::MLO-A5 cells are a fully differentiated osteoblastic cell line with the ability to rapidly synthesise mineralised extracellular matrix (ECM). We used MLO-A5 cells to develop a system for studying the mechanical modulation of bone matrix formation in 3D using a cyclic compressive loading stimulus. Polyurethane (PU) ope...
journal_title:Bone
pub_type: 杂志文章
doi:10.1016/j.bone.2008.12.027
更新日期:2009-05-01 00:00:00
abstract::The human calvarium is a sandwich structure with two dense layers of cortical bone separated by porous cancellous bone. The variation of the three dimensional geometry, including the layer thicknesses and the volume fraction of the cancellous layer across the population, is unavailable in the current literature. This ...
journal_title:Bone
pub_type: 杂志文章
doi:10.1016/j.bone.2015.04.031
更新日期:2015-08-01 00:00:00
abstract:BACKGROUND:Roux-en-Y gastric bypass (RYGB) is a common surgical procedure for treatment of morbid obesity. RYGB induces considerable and sustained weight loss, and remission of obesity related-comorbidities. While studies have suggested negative effects of RYGB on bone health, long-term data are lacking. We aimed to ev...
journal_title:Bone
pub_type: 杂志文章
doi:10.1016/j.bone.2019.07.014
更新日期:2019-10-01 00:00:00
abstract::Approximately 7.9 million fractures occur annually in the United States with 5-10% of these resulting in delayed or impaired healing. Nearly half of the trauma cost of $56 billion per year is used for the treatment of fractures. More importantly, fracture results in a substantial reduction in the quality of life. New ...
journal_title:Bone
pub_type: 杂志文章
doi:10.1016/j.bone.2011.06.037
更新日期:2011-11-01 00:00:00
abstract::This review begins with an introduction to the malignant bone tumor, osteosarcoma [OS] and then moves to a discussion of the commonly used vectors for gene transfer. We first briefly highlight non-viral vectors including polymeric and liposomal delivery systems but concentrate predominantly on the 5 leading viral vect...
journal_title:Bone
pub_type: 杂志文章,评审
doi:10.1016/j.bone.2006.10.017
更新日期:2007-04-01 00:00:00
abstract::We described a chick periosteal osteogenesis model at the light microscopic level and biochemically. To confirm that morphologically identifiable bone is being formed, we performed an ultrastructural study of this model. Samples of freshly dissected periostea, as well as whole calvariae, were fixed in glutaraldehyde. ...
journal_title:Bone
pub_type: 杂志文章
doi:10.1016/8756-3282(86)90211-5
更新日期:1986-01-01 00:00:00
abstract::High fat diets can have detrimental effects on the skeleton as well as cause intestinal dysbiosis. Exercise prevents high fat (HF) diet-induced obesity and also improves bone density and prevents the intestinal dysbiosis that promotes energy storage. Previous studies indicate a link between intestinal microbial balanc...
journal_title:Bone
pub_type: 杂志文章
doi:10.1016/j.bone.2018.03.024
更新日期:2019-01-01 00:00:00
abstract::The aim of the present study was to assess age-related changes in the human spine by use of established static histomorphometry, and to determine how these static histomorphometric measures are interrelated in human cancellous bone tissue. The material comprised normal human lumbar vertebral bodies (L-2) from 12 women...
journal_title:Bone
pub_type: 杂志文章
doi:10.1016/s8756-3282(00)00285-4
更新日期:2000-07-01 00:00:00
abstract::A more accurate understanding of the molecular mechanisms and signaling pathways underpinning human mesenchymal stem cell (MSC) plasticity and differentiation properties is pivotal for accomplishing solid and diligent translation of MSC-based experimental therapeutics and clinical trials to broad clinical practice. In...
journal_title:Bone
pub_type: 杂志文章
doi:10.1016/j.bone.2017.10.014
更新日期:2018-01-01 00:00:00
abstract::Despite the potential biological importance of sympathetic activity in human bone metabolism, its effects on bone microarchitecture, a key determinant of bone quality, has not been thoroughly studied. In the present study, we investigated the lumbar spine trabecular bone score (TBS) as an indicator of skeletal deterio...
journal_title:Bone
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1016/j.bone.2018.06.023
更新日期:2018-11-01 00:00:00
abstract::In some types of low-trauma fractures of older adults the number and incidence of fractures are stabilizing or even decreasing. However, very little population-based information is available concerning the nationwide numbers, incidences and especially secular trends of low-trauma fractures of the distal humerus. There...
journal_title:Bone
pub_type: 杂志文章
doi:10.1016/j.bone.2009.11.025
更新日期:2010-05-01 00:00:00
abstract::The gap junction protein, connexin43 (Cx43) controls both bone formation and osteoclastogenesis via osteoblasts and/or osteocytes. Cx43 has also been proposed to mediate an anti-apoptotic effect of bisphosphonates, potent inhibitors of bone resorption. We studied whether bisphosphonates are effective in protecting mic...
journal_title:Bone
pub_type: 杂志文章
doi:10.1016/j.bone.2012.06.018
更新日期:2012-10-01 00:00:00
abstract::Mutations in the GALNT3 gene result in familial tumoral calcinosis, characterized by persistent hyperphosphatemia and ectopic calcific masses in soft tissues. Since calcific masses often recur after surgical removal, a more permanent solution to the problem is required. Nicotinamide is reported to lower serum phosphat...
journal_title:Bone
pub_type: 杂志文章
doi:10.1016/j.bone.2014.06.036
更新日期:2014-10-01 00:00:00