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https://www.readbyqxmd.com/read/29457429/-stiletto-needle-and-needle-knife-for-influence-of-gravity-index-in-treating-knee-osteoarthritis
#1
Li-Jun Gu, Bin Zhang, Wen-Hua Li, Yan Tang, Fu-Hui Dong
OBJECTIVE: To explore stiletto needle and needle-knife for influence of double sufficient weight in treating knee osteoarthritis patients. METHODS: One hundred and thirteen early and medium term knee osteoarthritis patients were randomly divided into three groups, including stiletto needle group(38 cases), needle-knife group (38 cases) and voltaren group (37 cases). In stiletto needle group, there were 13 males and 25 females with an average of(55.87±7.72) years old, treated by stiletto needle once a week, and 2 weeks were a course; there were 11 males and 27 females in needle-knife group with an average of(57...
December 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29456169/kinematics-of-lower-limbs-during-walking-are-emulated-by-springy-walking-model-with-a-compliantly-connected-off-centered-curvy-foot
#2
Hyerim Lim, Sukyung Park
The dynamics of the center of mass (CoM) during walking and running at various gait conditions are well described by the mechanics of a simple passive spring loaded inverted pendulum (SLIP). Due to its simplicity, however, the current form of the SLIP model is limited at providing any further information about multi-segmental lower limbs that generate oscillatory CoM behaviors and their corresponding ground reaction forces. Considering that the dynamics of the CoM are simply achieved by mass-spring mechanics, we wondered whether any of the multi-joint motions could be demonstrated by simple mechanics...
February 8, 2018: Journal of Biomechanics
https://www.readbyqxmd.com/read/29453795/inflammatory-and-degenerative-phases-resulting-from-anterior-cruciate-rupture-in-a-non-invasive-murine-model-of-post-traumatic-osteoarthritis
#3
Sophie Jane Gilbert, Cleo Selina Bonnet, Paulina Stadnik, Victor Colin Duance, Deborah JaneMason, Emma Jane Blain
Joint injury is the predominant risk factor for post-traumatic osteoarthritis development (PTOA). Several non-invasive mouse models mimicking human PTOA investigate molecular mechanisms of disease development; none have characterised the inflammatory response to this acute traumatic injury. Our aim was to characterise the early inflammatory phase and later degenerative component in our in vivo non-invasive murine model of PTOA induced by anterior cruciate ligament (ACL) rupture. Right knees of 12-week-old C57Bl6 mice were placed in flexion at a 30° offset position and subjected to a single compressive load (12N, 1...
February 17, 2018: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29453120/mycobiota-and-co-occurrence-of-mycotoxins-in-south-african-maize-based-opaque-beer
#4
Ifeoluwa Adekoya, Adewale Obadina, Cynthia Chilaka Adaku, Marthe De Boevre, Sheila Okoth, Sarah De Saeger, Patrick Njobeh
Beer, a beverage consumed throughout the world, is mainly derived from cereals. In this study, fungal and mycotoxin contamination, as well as the physicochemical properties of maize-based opaque beer (umqombothi) obtained from the Gauteng province of South Africa, was investigated. The mean water activity, pH and total titratable acidity of the analysed beer samples were 0.91, 3.76 and 1.20% lactic acid, respectively. The investigation revealed Aspergillus, Penicillium, Phoma and Saccharomyces as the predominant fungal genera with a mean fungal load of 3...
February 9, 2018: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/29451056/epidemiology-of-injuries-in-portuguese-senior-male-rugby-union-sevens-a-cohort-prospective-study
#5
Antonio Miguel Cruz-Ferreira, Eduardo Miguel Cruz-Ferreira, João Diogo Silva, Ricardo Maia Ferreira, Luiz Miguel Santiago, Luis Taborda-Barata
OBJECTIVES: To assess the incidence, type and location of injuries sustained during the Portuguese rugby union sevens circuit. To investigate the influence of players' training loads on injury risk. METHODS: A prospective cohort study recording time-loss injuries was conducted with all teams competing in the Portuguese national rugby sevens circuit (eight from the top-tier and seven from the second-tier). Main outcome measures included: incidence rate, anatomical location, type, injury incident and severity...
February 16, 2018: Physician and Sportsmedicine
https://www.readbyqxmd.com/read/29450562/-which-typical-foot-fractures-should-the-radiologist-know
#6
REVIEW
G Bratke, V Neuhaus, K Slebocki, S Haneder, R Rau
CLINICAL/METHODICAL ISSUE: Due to mechanical loading and the number of joints involved, fractures of the foot are among the most common fractures. STANDARD RADIOLOGICAL METHODS: X-ray is basis for diagnostic workup of all foot fractures. METHODICAL INNOVATIONS: For stress fractures, the additional use of magnetic resonance imaging (MRI) is indicated. Computed tomography (CT) can be used for preoperative imaging of intraarticular tarsal fractures...
February 15, 2018: Der Radiologe
https://www.readbyqxmd.com/read/29449766/directional-preference-of-the-wrist-a-preliminary-investigation
#7
Joseph R Maccio, Lindsay Carlton, Sarah Fink, Chanel Ninan, Chandree Van Vranken, Garret Biese, Colin McGowan, Joseph G Maccio, Julia Tranquillo
Background: Directional preference is a phenomenon that occurs in musculoskeletal disorders. It is associated with improved symptomatic and functional outcomes. Research has shown a 90% increase in the identification of directional preference in the peripheral joints between 2006 and 2012. There is currently no research analyzing if predictive variables exist for establishing directional preference. Case Description: This report presents 19 consecutive patients with wrist pain...
December 2017: Journal of Manual & Manipulative Therapy
https://www.readbyqxmd.com/read/29449002/shoulder-joint-kinetics-and-dynamics-during-underwater-forward-arm-elevation
#8
Jessy Lauer, João Paulo Vilas-Boas, Annie Hélène Rouard
Aquatic exercises are widely implemented into rehabilitation programs. However, both evaluating their mechanical demands on the musculoskeletal system and designing protocols to provide progressive loading are difficult tasks. This study reports for the first time shoulder joint kinetics and dynamics during underwater forward arm elevation performed at speeds ranging from 22.5 to 90°/s. Net joint moments projected onto anatomical axes of rotation, joint power, and joint work were calculated in 18 participants through a novel approach coupling numerical fluid flow simulations and inverse dynamics...
February 9, 2018: Journal of Biomechanics
https://www.readbyqxmd.com/read/29448816/using-cartilage-mri-t2-mapping-to-analyze-early-cartilage-degeneration-in-the-knee-joint-of-young-professional-soccer-players
#9
Leonie Waldenmeier, Christoph Evers, Michael Uder, Rolf Janka, Frank Friedrich Hennig, Milena Liese Pachowsky, Götz Hannes Welsch
Objective To evaluate and characterize the appearance of articular cartilage in the tibiofemoral joint of young professional soccer players using T2-relaxation time evaluation on magnetic resonance imaging (MRI). Design In this study, we included 57 male adolescents from the youth academy of a professional soccer team. The MRI scans were acquired of the knee joint of the supporting leg. An "early unloading" (minute 0) and "late unloading" (minute 28) T2-sequence was included in the set of images...
February 1, 2018: Cartilage
https://www.readbyqxmd.com/read/29448756/ductile-crack-initiation-criterion-with-mismatched-weld-joints-under-dynamic-loading-conditions
#10
Gyubaek An, Se-Min Jeong, Jeongung Park
Brittle failure of high toughness steel structures tends to occur after ductile crack initiation/propagation. Damages to steel structures were reported in the Hanshin Great Earthquake. Several brittle failures were observed in beam-to-column connection zones with geometrical discontinuity. It is widely known that triaxial stresses accelerate the ductile fracture of steels. The study examined the effects of geometrical heterogeneity and strength mismatches (both of which elevate plastic constraints due to heterogeneous plastic straining) and loading rate on critical conditions initiating ductile fracture...
March 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29448160/multi-plane-multi-joint-lower-extremity-support-moments-during-a-rapid-deceleration-task-implications-for-knee-loading
#11
Jeffery T Podraza, Scott C White, Dan K Ramsey
The principle of lower limb support, and the contribution of hip, knee and ankle moments to an overall limb support strategy for an impact-like, rapid deceleration movement may help explain individual moment magnitude changes, thereby providing insight into how injury might occur or be avoided. Twenty subjects performed single limb, impact-like, deceleration landings at three different knee flexion angles in the range of 0-25, 25-50 and 50-75°. Kinematic and kinetic measures identified hip, knee and ankle moment contribution to limb support moments (LSMs) in three planes...
February 12, 2018: Human Movement Science
https://www.readbyqxmd.com/read/29447236/the-influence-of-a-change-in-the-meniscus-cross-sectional-shape-on-the-medio-lateral-translation-of-the-knee-joint-and-meniscal-extrusion
#12
Piotr Luczkiewicz, Karol Daszkiewicz, Wojciech Witkowski, Jacek Chróścielewski, Tomasz Ferenc, Boguslaw Baczkowski
OBJECTIVE: The purpose of this study was to evaluate the influence of a change in the meniscus cross sectional shape on its position and on the biomechanics of a knee joint. METHODS: One main finite element model of a left knee joint was created on the basis of MRI images. The model consisted of bones, articular cartilages, menisci and ligaments. Eight variants of this model with an increased or decreased meniscus height were then prepared. Nonlinear static analyses with a fixed flexion/extension movement for a compressive load of 1000 N were performed...
2018: PloS One
https://www.readbyqxmd.com/read/29444323/the-role-of-fat-and-inflammation-in-the-pathogenesis-and-management-of-osteoarthritis
#13
Hema Urban, Christopher B Little
OA is a complex disease involving mechanical, metabolic and inflammatory contributions to its aetiology. A key risk factor, obesity, is becoming an increasing focus of research due to its multiple potential impacts on OA incidence, progression and symptom severity. An increased load due to an increase in body mass has been well established as a mechanical contribution to the pathophysiology of OA. However, evidence of obesity-linked to OA in non-weight-bearing joints has implicated the biological role of adipose inflammation and metabolic abnormalities in OA...
February 9, 2018: Rheumatology
https://www.readbyqxmd.com/read/29439345/joint-assessment-of-quantitative-18f-florbetapir-and-18f-fdg-regional-uptake-using-baseline-data-from-the-adni
#14
Fayçal Ben Bouallègue, Denis Mariano-Goulart, Pierre Payoux
Joint analysis of amyloid and metabolic PET patterns across healthy, mild cognitive impairment (MCI), and Alzheimer's disease (AD) subjects was performed using baseline 18F-florbetapir and 18F-FDG PET of 684 subjects from the ADNI (251 normal, 204 stable MCI, 85 AD converters, and 144 AD). Correlation between regional amyloid and metabolic uptake was measured and predictive value of PET profile regarding AD conversion in cognitively impaired subjects was assessed using survival analysis and support vector machine classification (SVM)...
2018: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29438625/biomechanical-evaluation-of-a-single-versus-double-tunnel-coracoclavicular-ligament-reconstruction-with-acromioclavicular-stabilization-for-acromioclavicular-joint-injuries
#15
Michael B Banffy, Carlos Uquillas, Julie A Neumann, Neal S ElAttrache
BACKGROUND: An anatomic double-tunnel (DT) reconstruction technique has been widely adopted to reconstruct the ruptured coracoclavicular (CC) ligaments seen with high-grade acromioclavicular (AC) joint injuries. However, the anatomic DT reconstruction has been associated with the risk of clavicle fractures, which may be problematic, particularly for contact athletes. Purpose/Hypothesis: The purpose was to compare a single-tunnel (ST) CC ligament reconstruction for AC joint injuries with the native state as well as with the more established anatomic DT CC ligament reconstruction...
February 1, 2018: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29436742/biomechanical-influence-of-deficient-posterolateral-corner-structures-on-knee-joint-kinematics-a-computational-study
#16
Kyoung-Tak Kang, Yong-Gon Koh, Juhyun Son, Moonki Jung, Sangyun Oh, Sung-Jae Kim, Sung-Hwan Kim
The posterolateral corner (PLC) structures including the popliteofibular ligament (PFL), popliteus tendon (PT) and lateral collateral ligament (LCL) are important soft tissues for posterior translational, external rotational and varus angulation knee joint instabilities. The purpose of this study was to determine the effects of deficient PLC structures on the kinematics of the knee joint under gait and squat loading conditions. We developed subject-specific computational models with full 12-degree-of-freedom tibiofemoral and patellofemoral joints for four male subjects and one female subject...
February 13, 2018: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29435992/feasibility-and-safety-of-a-cemented-peek-on-pe-knee-replacement-in-a-goat-model-a-preliminary-study
#17
Zhe Du, Zhonglin Zhu, Bing Yue, Zhanchun Li, You Wang
Polyether-ether-ketone (PEEK) is a potential alternative to metal alloys for use in the orthopedic implants; however, an in vivo study in an appropriate animal model is essential and has not yet been initiated. The aim of the present study was to gather some preliminary evidence regarding the performance and safety of a cemented PEEK-based knee replacement device in a goat model. Fifteen adult goats were randomly divided into two groups; the control group (n = 5), which received a sham operation, and the experimental group (n = 10), which received a total knee arthroplasty with a PEEK-based knee replacement device...
February 13, 2018: Artificial Organs
https://www.readbyqxmd.com/read/29432112/the-development-and-preliminary-test-of-a-powered-alternately-walking-exoskeleton-with-the-wheeled-foot-for-paraplegic-patients
#18
Qingchuan Ma, Linhong Ji, Rencheng Wang
Upright walking has both physical and social meanings for paraplegic patients. The main purpose of this paper is to reduce the automatic functioning of the powered exoskeleton and enable the user to fully control the walking procedure in real-time, aiming to further improve the engagement of the patient during rehabilitation training. For this prototype, a custom-made hub motor was placed at the bottom of the exoskeleton's foot, and a pair of crutches with the embedded wireless controller were utilized as the auxiliary device...
February 2018: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/29431237/the-contribution-of-facet-joints-axial-compression-and-composition-to-human-lumbar-disc-torsion-mechanics
#19
Semih E Bezci, Ananth Eleswarapu, Eric O Klineberg, Grace D O'Connell
Stresses applied to the spinal column are distributed between the intervertebral disc and facet joints. Structural and compositional changes alter stress distributions within the disc and between the disc and facet joints. These changes influence the mechanical properties of the disc joint, including its stiffness, range of motion, and energy absorption under quasi-static and dynamic loads. There have been few studies evaluating the role of facet joints in torsion. Furthermore, the relationship between biochemical composition and torsion mechanics is not well understood...
February 12, 2018: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29431234/barium-titanate-microparticles-as-potential-carrier-platform-for-lanthanide-radionuclides-for-their-use-in-the-treatment-of-arthritis
#20
Sudipta Chakraborty, K V Vimalnath, Jyothi Sharma, Priyalata Shetty, H D Sarma, Rubel Chakravarty, Deep Prakash, P K Sinha, Ashutosh Dash
Since the inception of radiation synovectomy, a host of radioactive colloids and microparticles incorporating suitable therapeutic radionuclides have been proposed for the treatment of arthritis. The present article reports the synthesis and evaluation of barium titanate microparticles as an innovative and effective carrier platform for lanthanide radionuclides in the preparation of therapeutic agents for treatment of arthritis. The material was synthesized by mechanochemical route and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), surface area and particle size distribution analyses...
February 12, 2018: Journal of Labelled Compounds & Radiopharmaceuticals
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