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https://www.readbyqxmd.com/read/28917580/the-influence-of-ligament-modelling-strategies-on-the-predictive-capability-of-finite-element-models-of-the-human-knee-joint
#1
Hamid Naghibi Beidokhti, Dennis Janssen, Sebastiaan van de Groes, Javad Hazrati, Ton Van den Boogaard, Nico Verdonschot
In finite element (FE) models knee ligaments can represented either by a group of one-dimensional springs, or by three-dimensional continuum elements based on segmentations. Continuum models closer approximate the anatomy, and facilitate ligament wrapping, while spring models are computationally less expensive. The mechanical properties of ligaments can be based on literature, or adjusted specifically for the subject. In the current study we investigated the effect of ligament modelling strategy on the predictive capability of FE models of the human knee joint...
September 5, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28913396/severe-heterotopic-ossification-and-stiffness-after-revision-knee-surgery-for-a-periprosthetic-fracture
#2
Maher Baroudi, Pascale Derome, Michel Malo
Although heterotopic ossification (HO) after total hip arthroplasty has been very well described as a cause of disability, much less was written on clinical dysfunction of HO after total knee arthroplasty (TKA). To the extent of our knowledge, there has been no published case of complete bony ankylosis, secondary to severe generalized HO, after a TKA. We present the case of a 67-year-old female treated successfully, with surgical excision of ossification and TKA revision surgery, using a rotating hinge system...
September 2017: Arthroplasty Today
https://www.readbyqxmd.com/read/28912633/a-preliminary-case-series-evaluating-the-safety-and-immediate-to-short-term-clinical-benefits-of-joint-mobilization-in-hemophilic-arthritis-of-the-lower-limb
#3
Emma Scaddan, John Rowell, Shaun O'Leary
OBJECTIVES: Arthritis resulting from recurrent intra-articular bleeding in individuals with hemophilia can be severely debilitating due to joint pain and stiffness with subsequent loss of mobility and function. Very limited studies have investigated the potential benefits of joint mobilization for this condition. This case series is a preliminary investigation of safety, as well as immediate and short-term clinical benefits, associated with gentle knee and ankle joint mobilization in people with hemophilic arthropathy...
September 2017: Journal of Manual & Manipulative Therapy
https://www.readbyqxmd.com/read/28910372/correlation-of-serum-cartilage-oligometric-matrix-protein-comp-and-interleukin-16-il-16-levels-with-disease-severity-in-primary-knee-osteoarthritis-a-pilot-study-in-a-malaysian-population
#4
Esha Das Gupta, Wei Ren Ng, Shew Fung Wong, Abdul Kareem Bhurhanudeen, Swan Sim Yeap
OBJECTIVE: The aim of this study was to investigate the correlations between serum cartilage oligomeric matrix protein (COMP), interleukin-16 (IL-16) and different grades of knee osteoarthritis (KOA) in Malaysian subjects. METHODS: Ninety subjects were recruited comprising 30 with Kellgren-Lawrence (K-L) grade 2 KOA, 27 with K-L grade 3 KOA, 7 with grade 4 KOA, and 30 healthy controls. All subjects completed the Western Ontario and McMaster Universities Arthritis Index (WOMAC) questionnaire...
2017: PloS One
https://www.readbyqxmd.com/read/28899844/a-new-lipid-formulation-of-low-dose-ibuprofen-shows-non-inferiority-to-high-dose-standard-ibuprofen-the-flare-study-flaring-arthralgia-relief-evaluation-in-episodic-flaring-knee-pain-a-randomised-double-blind-study
#5
Sita Ma Bierma-Zeinstra, John Brew, Karen Stoner, Rosamund Wilson, Anthony Kilbourn, Philip G Conaghan
OBJECTIVE: To investigate short-term efficacy and safety of a novel lipid ibuprofen formulation 1200mg/day compared with standard ibuprofen 1200mg/day and 2400mg/day in episodic knee arthralgia/flaring pain. DESIGN: Multicentre, randomised, double-blind, 3-arm, non-inferiority trial conducted at 27 primary care centres. Adults with ≥1 knee flare episode within 12 months were recruited within 24 hours of new flare with pain severity ≥5 on a 0-10 numerical rating scale (NRS)...
September 9, 2017: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/28892760/effects-of-inter-synergistic-mechanical-interactions-on-the-mechanical-behaviour-of-activated-spastic-semitendinosus-muscle-of-patients-with-cerebral-palsy
#6
Cemre S Kaya, Yener Temelli, Filiz Ates, Can A Yucesoy
Previous physiological experiments and finite element modelling indicate that inter-synergistic epimuscular myofascial force transmission (EMFT) between co-activated muscles has a potential to affect healthy muscle's contribution to joint moment and joint range of movement. This is quite relevant for patients with cerebral palsy (CP) since, amplitude of spastic muscle's force and the joint range of force exertion are central to the joint movement limitation. Stiffness of activated spastic muscle is also a determinant for pathological joint movement...
September 3, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28889010/pain-in-osteoarthritis-implications-for-optimal-management
#7
Anne-Priscille Trouvin, Serge Perrot
Pain is an ubiquitous symptom in osteoarticular diseases, occurring much more commonly than stiffness or disability. OA of the knee, hand, or hip affects around 20% of adults in various populations and is dramatically increasing in many countries, mostly related to age and obesity, leading to an increased number of people having OA pain, and creating a huge burden related to disability and health care costs. OA-related pain, has been classically considered to be a nociceptive pain condition. Clinicians have considered pain to be an alarm signal, correlated to the intensity of joint degradation...
September 6, 2017: Joint, Bone, Spine: Revue du Rhumatisme
https://www.readbyqxmd.com/read/28887020/narcotic-use-and-total-knee-arthroplasty
#8
Jourdan M Cancienne, Kishan J Patel, James A Browne, Brian C Werner
BACKGROUND: Although the United States is in the midst of a narcotic epidemic, risk factors for use and the impact of perioperative narcotic use on total knee arthroplasty (TKA) outcomes is ill-defined. METHODS: A national database was queried for patients who underwent primary TKA from 2007 to 2015. Patients taking narcotics in the preoperative, and for a prolonged period of time postoperatively, were identified. The risk factors for prolonged narcotic use were analyzed with a regression analysis, in addition to evaluating preoperative and prolonged postoperative use as independent risk factors for short-term and long-term complications...
August 17, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28886079/associations-between-lower-limb-muscle-activation-and-knee-flexion-in-post-stroke-individuals-a-study-on-the-stance-to-swing-phases-of-gait
#9
Wei Wang, Ke Li, Shouwei Yue, Cuiping Yin, Na Wei
Reduced knee flexion is a leading feature of post-stroke gait, but the causes have not been well understood. The purpose of this study was to investigate the relationship between the knee flexion and the lower-limb muscle activation within the stance-to-swing phases of gait cycle in the post-stroke hemiplegic patients. Ten stroke patients and 10 age- and gender-matched healthy subjects participated in the experiment. The lower-limb kinematic signals and the surface electromyography (sEMG) signals of the left and right rectus femoris (RF), biceps femoris (BF) and lateral gastrocnemius (GS) were recorded during walking...
2017: PloS One
https://www.readbyqxmd.com/read/28880590/foot-pain-in-relation-to-ipsilateral-and-contralateral-lower-extremity-pain-in-a-population-based-study
#10
Alyssa B Dufour, Brian Halpern, Rock G Positano, Howard J Hillstrom, Marian T Hannan
BACKGROUND: Clinical observations note that foot pain can be linked to contralateral pain at the knee or hip, yet we are unaware of any community-based studies that have investigated the sidedness of pain. Because clinic-based patient samples are often different from the general population, the purpose of this study was to determine whether knee or hip pain is more prevalent with contralateral foot pain than with ipsilateral foot pain in a population-based cohort. METHODS: Framingham Foot Study participants (2002-2008) with information on foot, knee, and hip pain were included in this cross-sectional analysis...
July 2017: Journal of the American Podiatric Medical Association
https://www.readbyqxmd.com/read/28878468/the-effect-of-changing-condition-of-walking-speed-on-the-knee-angle-of-rats-with-osteoarthritis
#11
Chan-Woo Nam, Kyoung Kim, Sang-Su Na
[Purpose] The purpose of this study was to investigate the positive effect of exercise on knee osteoarthritis in rats with osteoarthritis induced by applying effective walking speed when changing speed conditions during walking. [Subjects and Methods] The rats used in this study were male Sprague-Dawley rats weighing 300 g and 7 weeks old, and 20 rats were used. The Osteoarthritis (OA) rats model was induced by MIA (monoiodoacetate). The rats was randomly divided into experimental group (MIA injection group) and control group (normal cell line injection group)...
August 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28875154/structural-and-anatomic-restoration-of-the-anterior-cruciate-ligament-is-associated-with-less-cartilage-damage-1-year-after-surgery-healing-ligament-properties-affect-cartilage-damage
#12
Ata M Kiapour, Braden C Fleming, Martha M Murray
BACKGROUND: Abnormal joint motion has been linked to joint arthrosis after anterior cruciate ligament (ACL) reconstruction. However, the relationships between the graft properties (ie, structural and anatomic) and extent of posttraumatic osteoarthritis are not well defined. HYPOTHESES: (1) The structural (tensile) and anatomic (area and alignment) properties of the reconstructed graft or repaired ACL correlate with the total cartilage lesion area 1 year after ACL surgery, and (2) side-to-side differences in anterior-posterior (AP) knee laxity correlate with the total cartilage lesion area 1 year postoperatively...
August 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28869185/gait-variability-and-motor-control-in-patients-with-knee-osteoarthritis-as-measured-by-the-uncontrolled-manifold-technique
#13
Gwenllian Fflur Tawy, Philip Rowe, Leela Biant
Knee osteoarthritis (OA) causes pain, reduced muscular strength and stiffness of the affected joint. In response, the motor control mechanism is altered, potentially compromising stability during acts of daily living. Reduced walking stability can be quantified in terms of gait variability. This study therefore aimed to identify and quantify the effects of knee arthritis on gait variability. Fifty adults (25 males/25 females) with end-stage OA of the knee sufficiently symptomatic to require joint replacement, walked on a self-paced treadmill for 2min...
August 18, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28868990/the-effects-of-whole-body-vibration-on-pulse-wave-velocity-in-men-with-chronic-spinal-cord-injury
#14
Julia O Totosy de Zepetnek, Masae Miyatani, Maggie Szeto, Lora M Giangregorio, B Catharine Craven
Objective A pilot study to evaluate the therapeutic potential of 40 weeks of passive standing with whole body vibration (PS-WBV) on central and peripheral arterial stiffness among men with chronic spinal cord injury (SCI). Methods Consenting participants were pre-screened to ensure safe participation. Fifteen individuals with chronic SCI were enrolled to participate in PS-WBV sessions three times per week for 40 weeks on a modified WAVE platform custom-fitted with an EASYStand 5000. Knee angle was set at 160°, and vibration parameters were 45Hz frequency and 0...
September 4, 2017: Journal of Spinal Cord Medicine
https://www.readbyqxmd.com/read/28865708/computational-stability-of-human-knee-joint-at-early-stance-in-gait-effects-of-muscle-coactivity-and-anterior-cruciate-ligament-deficiency
#15
M Sharifi, A Shirazi-Adl, H Marouane
As one of the most complex and vulnerable structures of body, the human knee joint should maintain dynamic equilibrium and stability in occupational and recreational activities. The evaluation of its stability and factors affecting it is vital in performance evaluation/enhancement, injury prevention and treatment managements. Knee stability often manifests itself by pain, hypermobility and giving-way sensations and is usually assessed by the passive joint laxity tests. Mechanical stability of both the human knee joint and the lower extremity at early stance periods of gait (0% and 5%) were quantified here for the first time using a hybrid musculoskeletal model of the lower extremity...
August 20, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28865574/can-competitive-athletes-return-to-high-level-play-after-osteochondral-allograft-transplantation-of-the-knee
#16
Mark A McCarthy, Maximilian A Meyer, Alexander E Weber, David M Levy, Annemarie K Tilton, Adam B Yanke, Brian J Cole
PURPOSE: To investigate functional outcomes among competitive athletes undergoing osteochondral allograft (OCA) transplantation of the knee, including rates of return to play (RTP), and factors preventing RTP. METHODS: A retrospective review identified all competitive athletes (high school, intercollegiate, professional) undergoing isolated femoral condyle OCA from 2004 to 2013. Patient-reported outcome (PRO) questionnaires (Lysholm, International Knee Documentation Committee [IKDC], Knee Injury and Osteoarthritis Outcome Score [KOOS], Western Ontario and McMasters Universities Arthritis Index [WOMAC], 12-Item Short Form Health Survey [SF-12], Tegner, and Marx) and custom RTP surveys were administered...
September 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/28865300/technical-feasibility-of-personalized-articulating-knee-joint-distraction-for-treatment-of-tibiofemoral-osteoarthritis
#17
T Struik, J E N Jaspers, N J Besselink, P M van Roermund, S Plomp, M J Rudert, F P J G Lafeber, S C Mastbergen
BACKGROUND: Knee osteoarthritis is a highly prevalent degenerative joint disorder characterized by joint tissue damage and pain. Knee joint distraction has been introduced as a joint preserving surgical procedure to postpone knee arthroplasty. An often used standard externally fixation device for distraction poses a burden to patients due to the absence of joint flexion during the 6weeks treatment. Therefore, a personalized articulating distraction device was developed. The aim of this study was to test technical feasibility of this device...
August 12, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28864651/associations-between-knee-effusion-synovitis-and-joint-structural-changes-in-patients-with-knee-osteoarthritis
#18
Xia Wang, Xingzhong Jin, Leigh Blizzard, Benny Antony, Weiyu Han, Zhaohua Zhu, Flavia Cicuttini, Anita E Wluka, Tania Winzenberg, Graeme Jones, Changhai Ding
OBJECTIVE: To describe the associations between effusion-synovitis and joint structural abnormalities in patients with knee osteoarthritis (OA) over 24 months. METHODS: A posthoc analysis using data from a randomized controlled trial in 413 patients with symptomatic OA (aged 63 ± 7 yrs, 208 women). Knee effusion-synovitis volume and score, cartilage defects, cartilage volume, and bone marrow lesions (BML) were assessed using magnetic resonance imaging. Joint space narrowing (JSN) and osteophytes were assessed using radiograph...
September 1, 2017: Journal of Rheumatology
https://www.readbyqxmd.com/read/28860683/simultaneous-ipsilateral-knee-arthroscopy-and-unicondylar-knee-arthroplasty-is-effective-for-bicompartmental-symptoms
#19
Akshay Lakra, Taylor Murtaugh, Jeffrey A Geller, William Macaulay, Roshan P Shah
BACKGROUND: Patients with unicompartmental radiographic arthritis but bicompartmental symptoms pose a clinical challenge. Some surgeons may perceive it as a contraindication for unicondylar knee arthroplasty (UKA). We investigated patient outcomes 2 years after simultaneous ipsilateral arthroscopy and UKA as compared to a similar group of patients who had total knee replacement (TKA) for a similar clinical presentation. METHODS: We identified 9 patients with simultaneous ipsilateral arthroscopy and UKA between 2004 and 2013, and 12 clinically similar patients treated with TKA...
December 2017: Journal of Orthopaedics
https://www.readbyqxmd.com/read/28858727/association-between-joint-stiffness-and-health-related-quality-of-life-in-community-dwelling-older-adults
#20
Shunsuke Murata, Takehiko Doi, Ryuichi Sawa, Takashi Saito, Ryo Nakamura, Tsunenori Isa, Aoi Ebina, Yuki Kondo, Yamato Tsuboi, Shogo Misu, Rei Ono
OBJECTIVE: This study aimed to examine the association between joint stiffness and health-related quality of life (HRQOL) in community-dwelling older adults. METHODS: Participants in this cross-sectional study were 530 Japanese community-dwelling older adults (mean age, 73.9 years; women, 64.3%). Joint stiffness was assessed at the neck, low back, shoulder, elbow, hand or wrist, hip, knee, and ankle or feet; the duration of joint stiffness was also evaluated. We assessed HRQOL using the Short Form-12 (SF-12) and EuroQOL-5 Dimension (EQ-5D) questionnaires...
August 1, 2017: Archives of Gerontology and Geriatrics
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