Abstract：
OBJECTIVE:We aimed to determine the minimum mechanical impact to cause microstructural damage in the network of collagen (microcracking) within human cartilage and hypothesized that energies below 0.1 J or 1 mJ/mm3 would suffice. DESIGN:We completed 108 low-energy impact tests (0.05, 0.07, or 0.09 J; 0.75 or 1.0 m/s2) using healthy cartilage specimens from six male donors (30.2 ± 8.8 yrs old). Before and after impact we acquired, imaging the second harmonic generation (SHG), ten images from each specimen (50 μm depth, 5 μm step size), resulting in 2160 images. We quantified both the presence and morphology of microcracks. We then correlated test parameters (predictors) impact energy/energy dissipation density, nominal stress/stress rate, and strain/strain rate to microcracking and tested for significance. Where predictors significantly correlated with microstructural outcomes we fitted binary logistic regression plots with 95% confidence intervals (CIs). RESULTS:No specimens presented visible damage following impact. We found that impact energy/energy dissipation density and nominal stress/stress rate were significant (P < 0.05) predictors of microcracking while both strain and strain rate were not. In our test configuration, an impact energy density of 2.93 mJ/mm3, an energy dissipation density of 1.68 mJ/mm3, a nominal stress of 4.18 MPa, and a nominal stress rate of 689 MPa/s all corresponded to a 50% probability of microcracking in the network of collagen. CONCLUSIONS:An impact energy density of 1.0 mJ/mm3 corresponded to a ∼20% probability of microcracking. Such changes may initiate a degenerative cascade leading to post-traumatic osteoarthritis.
journal_name
Osteoarthritis Cartilagejournal_title
Osteoarthritis and cartilageauthors
Kaleem B,Maier F,Drissi H,Pierce DMdoi
10.1016/j.joca.2016.11.009subject
Has Abstractpub_date
2017-04-01 00:00:00pages
544-553issue
4eissn
1063-4584issn
1522-9653pii
S1063-4584(16)30412-5journal_volume
25pub_type
杂志文章abstract：OBJECTIVE:This study examined the effects of reduced and elevated weight bearing on post-traumatic osteoarthritis (PTOA) development, locomotor joint kinematics, and degree of voluntary activity in rats following medial meniscal transection (MMT). DESIGN:Twenty-one adult rats were subjected to MMT surgery of the left ...
journal_title：Osteoarthritis and cartilage
pub_type： 杂志文章
doi：10.1016/j.joca.2019.08.001
更新日期：2019-12-01 00:00:00
abstract：OBJECTIVE:The European Society on Clinical and Economic aspects of Osteoporosis and Osteoarthritis (ESCEO) organised a working group to evaluate the need for updating the current European guideline on clinical investigation of drugs used in the treatment of osteoarthritis (OA). DESIGN:Areas of potential attention were...
journal_title：Osteoarthritis and cartilage
pub_type： 共识发展会议,杂志文章,评审
doi：10.1016/j.joca.2015.07.001
更新日期：2015-12-01 00:00:00
abstract：OBJECTIVE:To evaluate the levels of plasmatic and synovial Coll2-1, Coll2-1NO(2) and myeloperoxidase (MPO) in horses with osteochondral lesions of the tarsocrural joint and to investigate how these levels relate to arthroscopic findings of inflammation and degeneration. MATERIALS AND METHODS:Venous blood and synovial ...
journal_title：Osteoarthritis and cartilage
pub_type： 杂志文章
doi：10.1016/j.joca.2011.08.002
更新日期：2011-11-01 00:00:00
abstract：OBJECTIVES:The aims of this study were to: 1. Evaluate the performance of arthroscopy for the diagnosis of chondropathy and to compare it to that of direct non-arthroscopic assessments; 2. Determine intra-observer reliability of arthroscopic assessments; 3. Evaluate the effects of the arthroscopic video quality and pro...
journal_title：Osteoarthritis and cartilage
pub_type： 杂志文章
doi：10.1016/j.joca.2004.12.005
更新日期：2005-05-01 00:00:00
abstract：OBJECTIVE:In healthy joints, a zone of calcified cartilage (ZCC) provides the mechanical integration between articular cartilage and subchondral bone. Recapitulation of this architectural feature should serve to resist the constant shear force from the movement of the joint and prevent the delamination of tissue-engine...
journal_title：Osteoarthritis and cartilage
pub_type： 杂志文章
doi：10.1016/j.joca.2015.04.010
更新日期：2015-08-01 00:00:00
abstract：OBJECTIVE:The aim of this study was to determine a set of measures for the evaluation of balance in patients suffering from hip osteoarthritis (OA) that were both reliable and responsive to change. DESIGN:Three groups of subjects; Healthy, hip OA patients without surgery, and hip OA with surgery (pre and post-surgery)...
journal_title：Osteoarthritis and cartilage
pub_type： 杂志文章
doi：10.1016/j.joca.2015.03.029
更新日期：2015-08-01 00:00:00
abstract：OBJECTIVE:Protective effects of SKI 306X, a natural herbal product extracted from three herbs Clematis mandshurica, Trichosanthes kirilowii, and Prunella vulgaris, on articular cartilage was examined and compared with other osteoarthritis (OA) drugs using in vitro and in vivo models. METHODS:In vitro culture of rabbit...
journal_title：Osteoarthritis and cartilage
pub_type： 杂志文章
doi：10.1053/joca.2002.0526
更新日期：2002-06-01 00:00:00
abstract：:The significance of activating proteins (AP-1), c-fos, c-jun and jun B relative to the AP-1 responsive metallothionein, collagenase and stromelysin gene expression in the pathophysiology of osteoarthritis (OA) was investigated. The 'early' c-fos, c-jun and jun-B mRNAs were ubiquitously expressed in normal and OA human...
journal_title：Osteoarthritis and cartilage
pub_type： 杂志文章
doi：10.1016/s1063-4584(05)80085-8
更新日期：1993-07-01 00:00:00
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journal_title：Osteoarthritis and cartilage
pub_type： 杂志文章,meta分析
doi：10.1016/j.joca.2017.11.018
更新日期：2018-09-01 00:00:00
abstract：INTRODUCTION:Systematic reviews agree that knee osteoarthritis (OA) is related to occupational activities, but have not quantified the overall risks. METHODS:Systematic review of observational studies of knee OA and occupation. Job titles, elite sport, heavy work, kneeling, and other activities were included. Relative...
journal_title：Osteoarthritis and cartilage
pub_type： 杂志文章,meta分析,评审
doi：10.1016/j.joca.2011.02.016
更新日期：2011-07-01 00:00:00
abstract：OBJECTIVE:Test the hypothesis that greater baseline peak external knee adduction moment (KAM), KAM impulse, and peak external knee flexion moment (KFM) during the stance phase of gait are associated with baseline-to-2-year medial tibiofemoral cartilage damage and bone marrow lesion progression, and cartilage thickness ...
journal_title：Osteoarthritis and cartilage
pub_type： 杂志文章
doi：10.1016/j.joca.2015.02.005
更新日期：2015-07-01 00:00:00
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journal_title：Osteoarthritis and cartilage
pub_type： 杂志文章
doi：10.1016/j.joca.2007.11.012
更新日期：2008-08-01 00:00:00
abstract：OBJECTIVE:Quantitation and analyses of the fine structure of glycosaminoglycans are increasingly important for understanding many biological processes, including those most critical for understanding skeletal biology. We have developed a novel procedure, fluorophore-assisted carbohydrate electrophoresis (FACE), for det...
journal_title：Osteoarthritis and cartilage
pub_type： 杂志文章
doi：10.1053/joca.2001.0439
更新日期：2001-01-01 00:00:00
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journal_title：Osteoarthritis and cartilage
pub_type： 杂志文章
doi：10.1016/j.joca.2014.04.010
更新日期：2014-06-01 00:00:00
abstract：BACKGROUND:Arthroscopic partial meniscectomy (APM) is the most frequently performed orthopedic procedure. Functional outcomes of APM are variable, particularly among patients with underlying knee osteoarthritis. While most patients undergoing APM have knee magnetic resonance imaging (MRI) performed preoperatively, the ...
journal_title：Osteoarthritis and cartilage
pub_type： 杂志文章
doi：10.1016/j.joca.2005.11.014
更新日期：2006-05-01 00:00:00
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journal_title：Osteoarthritis and cartilage
pub_type： 杂志文章
doi：10.1016/j.joca.2013.08.007
更新日期：2013-11-01 00:00:00
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journal_title：Osteoarthritis and cartilage
pub_type： 杂志文章
doi：10.1016/j.joca.2007.06.008
更新日期：2008-02-01 00:00:00
abstract：OBJECTIVE:Calcitonin (CT) has been recently shown to exhibit direct protective effects on articular cartilage against joint degenerative disease. It has been proposed that CT might act via the CT receptor (CTR) to activate the cyclic AMP (cAMP) pathway and protect type II collagen degradation. In this study, we investi...
journal_title：Osteoarthritis and cartilage
pub_type： 杂志文章
doi：10.1016/j.joca.2007.08.003
更新日期：2008-04-01 00:00:00
abstract：OBJECTIVE:Magnetic resonance imaging (MRI) texture analysis is a method of analyzing subchondral bone alterations in osteoarthritis (OA). The objective of this study was to evaluate the association between MR texture analysis and ground-truth subchondral bone histomorphometry at the tibial plateau. DESIGN:The local re...
journal_title：Osteoarthritis and cartilage
pub_type： 杂志文章
doi：10.1016/j.joca.2016.12.011
更新日期：2017-05-01 00:00:00
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journal_title：Osteoarthritis and cartilage
pub_type： 杂志文章
doi：10.1016/j.joca.2018.01.013
更新日期：2018-04-01 00:00:00
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journal_title：Osteoarthritis and cartilage
pub_type： 杂志文章
doi：10.1016/j.joca.2015.11.019
更新日期：2016-05-01 00:00:00
abstract：OBJECTIVE:Adult articular cartilage is a physiologically hypoxic tissue with a proposed gradient of oxygen tension ranging from <10% oxygen at the cartilage surface to <1% in the deepest layers. This gradient may be disturbed during diseases of the joint, for example in rheumatoid arthritis when synovial fluid pO(2)fal...
journal_title：Osteoarthritis and cartilage
pub_type： 杂志文章
doi：10.1053/joca.2000.0396
更新日期：2001-05-01 00:00:00
abstract：OBJECTIVE:Until now there have been no appropriate models for metacarpophalangeal osteoarthritis (OA), even though OA in this joint is a significant medical and economic problem in horses. A good model would be useful to evaluate progression and treatment of OA, particularly in this joint. Therefore, we translated the ...
journal_title：Osteoarthritis and cartilage
pub_type： 杂志文章
doi：10.1016/j.joca.2007.11.010
更新日期：2008-08-01 00:00:00
abstract：OBJECTIVE:To develop a whole joint scoring system, the Anterior Cruciate Ligament OsteoArthritis Score (ACLOAS), for magnetic resonance imaging (MRI)-based assessment of acute anterior cruciate ligament (ACL) injury and follow-up of structural sequelae, and to assess its reliability. DESIGN:Baseline and follow-up 1.5 ...
journal_title：Osteoarthritis and cartilage
pub_type： 杂志文章,随机对照试验
doi：10.1016/j.joca.2014.03.006
更新日期：2014-05-01 00:00:00
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journal_title：Osteoarthritis and cartilage
pub_type： 杂志文章
doi：10.1016/j.joca.2016.10.014
更新日期：2017-04-01 00:00:00
abstract：OBJECTIVES:To examine the in situ distributions of vitamin D receptors (VDR) and matrix metalloproteinases (MMPs) in osteoarthritic cartilage for comparison with non-arthritic, normal cartilage; and to assess the in vitro effects of 1alpha,25 dihydroxyvitaminD(3)(1alpha,25(OH)(2)D(3)) on MMPs-1, -3 and -9 and prostagla...
journal_title：Osteoarthritis and cartilage
pub_type： 杂志文章
doi：10.1053/joca.2000.0408
更新日期：2001-07-01 00:00:00
abstract：OBJECTIVES:To determine T2* relaxation in articular cartilage using ultrashort echo time (UTE) imaging and bi-component analysis, with an emphasis on the deep radial and calcified cartilage. METHODS:Ten patellar samples were imaged using two-dimensional (2D) UTE and Car-Purcell-Meiboom-Gill (CPMG) sequences. UTE image...
journal_title：Osteoarthritis and cartilage
pub_type： 杂志文章
doi：10.1016/j.joca.2015.08.017
更新日期：2016-02-01 00:00:00
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journal_title：Osteoarthritis and cartilage
pub_type： 杂志文章
doi：10.1016/j.joca.2006.01.011
更新日期：2006-08-01 00:00:00
abstract：OBJECTIVE:To resolve uncertainty regarding sex differences in osteoarthritis (OA) by performing a meta-analysis of sex differences in OA prevalence, incidence and severity. METHODS:Standard search strategies for population-based studies of OA providing sex-specific data. Random effects meta-analysis to provide pooled ...
journal_title：Osteoarthritis and cartilage
pub_type： 杂志文章,meta分析
doi：10.1016/j.joca.2005.04.014
更新日期：2005-09-01 00:00:00
abstract：OBJECTIVE:The purpose of this paper is to review changes in the biomechanical properties of tendons and ligaments from joint disuse. METHOD:We have reviewed 37 experimental studies on joint disuse, which have been carried out with various models of disuse and with various animals. RESULTS:Immobilization of joints has...
journal_title：Osteoarthritis and cartilage
pub_type： 杂志文章
doi：10.1053/joca.1998.0167
更新日期：1999-01-01 00:00:00
