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https://www.readbyqxmd.com/read/29733043/effect-of-whole-body-vibration-on-neuromuscular-performance-a-literature-review
#1
Mohd Mukhtar Alam, Abid Ali Khan, Mohd Farooq
BACKGROUND: Whole-body vibration (WBV) is a neuromuscular training method that has recently received popularity in health and fitness centers, as an additional or substitute method to conventional training and therapy, in order to improve muscle strength and power. OBJECTIVE: The purpose of this review is to critically observe the effect of WBV training on neuromuscular performance in view of its ability to enhance the muscles strength, power, and flexibility; and also to investigate the influence of the different vibration characteristics (viz...
2018: Work: a Journal of Prevention, Assessment, and Rehabilitation
https://www.readbyqxmd.com/read/29729332/does-the-intensity-of-daily-walking-matter-for-protecting-against-the-development-of-a-slow-gait-speed-in-people-with-or-at-high-risk-of-knee-osteoarthritis-an-observational-study
#2
Sally Am Fenton, Tuhina Neogi, Dorothy Dunlop, Michael Nevitt, Michael Doherty, Joan L Duda, Rainer Klocke, Abhishek Abhishek, Alison Rushton, Weiya Zhang, Cora E Lewis, James Torner, George Kitas, Daniel K White
OBJECTIVE: Knee osteoarthritis (OA) is a risk factor for a decline in gait speed. Daily walking reduces the risk of developing slow gait speed and future persistent functional limitation. However, the protective role of walking intensity is unclear. We investigated the association of substituting time spent not walking, with walking at light and moderate-to-vigorous intensities for incident slow gait over two-years, among people with or at high risk of knee osteoarthritis (OA). METHOD: We used baseline and two-year follow-up data from the Multicenter Osteoarthritis (MOST) study (n=1731) and the Osteoarthritis Initiative (OAI, n=1925)...
May 2, 2018: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/29725704/substituting-anticipatory-locomotor-adjustments-online-is-time-constrained
#3
Bradford J McFadyen, Félix Fiset, Caroline Charette
Two crucial, multi-articular strategies for anticipatory locomotor adjustments (ALA) are knee flexor generation to step over obstacles and hip flexor generation to step up. While lower limb control can be adapted online to modify an already planned obstacle avoidance, or to avoid the sudden appearance of an obstacle, it is not known whether a planned ALA can be substituted by different one online. The present objective was to study such ALA substitutions at two specific timepoints: the final planning stage and the initiation of ALA execution...
May 3, 2018: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/29715509/relationship-between-knee-joint-contact-forces-and-external-knee-joint-moments-in-patients-with-medial-knee-osteoarthritis-effects-of-gait-modifications
#4
R E Richards, M S Andersen, J Harlaar, J C van den Noort
OBJECTIVE: To evaluate i) the relationship between the knee contact force (KCF) and knee adduction and flexion moments (KAM and KFM) during normal gait in people with medial knee osteoarthritis (KOA), ii) to evaluate the effects on the KCF of walking with a modified gait pattern and iii) to evaluate the relationship between changes in the KCF and changes in the knee moments. METHOD: We modeled the gait biomechanics of thirty-five patients with medial KOA using the AnyBody Modeling System during normal gait and two modified gait patterns...
April 28, 2018: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/29691817/bioceramics-for-osteochondral-tissue-engineering-and-regeneration
#5
Sandra Pina, Rita Rebelo, Vitor Manuel Correlo, J Miguel Oliveira, Rui L Reis
Considerable advances in tissue engineering and regeneration have been accomplished over the last decade. Bioceramics have been developed to repair, reconstruct, and substitute diseased parts of the body and to promote tissue healing as an alternative to metallic implants. Applications embrace hip, knee, and ligament repair and replacement, maxillofacial reconstruction and augmentation, spinal fusion, bone filler, and repair of periodontal diseases. Bioceramics are well-known for their superior wear resistance, high stiffness, resistance to oxidation, and low coefficient of friction...
2018: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29668473/the-history-of-bone-tumour-treatment-and-the-state-of-the-art-in-vienna
#6
Rainer Kotz
PURPOSES: Bone tumours have been a tragedy for the patient in any time period. In the majority of the cases it occurs in children or young adults. In the past the affected limbs could not be spared and the overall prognosis was poor. METHODS: Chemotherapy successfully introduced for the purpose of overcoming the poor overall prognosis (Rosen and Jaffe) and tumour prostheses were invented for the purpose of salvaging the affected limbs (Marcove, Scales, Campanacci, Sivas, Salzer)...
December 1, 2017: Prilozi (Makedonska Akademija Na Naukite i Umetnostite. Oddelenie za Medicinski Nauki)
https://www.readbyqxmd.com/read/29627848/fixation-augmentation-using-calcium-phosphate-bone-substitute-improves-outcomes-of-complex-tibial-plateau-fractures-a-matched-cohort-study
#7
Matthieu Ollivier, Yassine Bulaïd, Christophe Jacquet, Sebastien Pesenti, Jean-Noel Argenson, Sebastien Parratte
INTRODUCTION: Injectable cements have been developed to improve fixation's stability and thus obtain early return to adequate joint function. We aimed to compare post-operative radiographic and clinical outcomes of patients suffering from a complex tibial plateau fracture (TPF) fixed with calcium-phosphate bone substitutes (CPBS) augmentation to a matched group of patients with identical fracture pattern, treated with the same fixation's type, but augmented with bone grafting. METHODS: After local ethic committee approval, we retrospectively identified in a prospectively collected database, patients with complex comminuted metaphyseal and epiphysial bicondylar TPF (Schatzker type VI) admitted in our emergency department between January 2011 and December 2013...
April 7, 2018: International Orthopaedics
https://www.readbyqxmd.com/read/29615500/structural-and-regulatory-changes-in-pbp4-trigger-decreased-%C3%AE-lactam-susceptibility-in-enterococcus-faecalis
#8
Louis B Rice, Charlene Desbonnet, Amelia Tait-Kamradt, Monica Garcia-Solache, John Lonks, Thomas M Moon, Éverton D D'Andréa, Rebecca Page, Wolfgang Peti
Enterococcus faecalis strains resistant to penicillin and ampicillin are rare and have been associated with increases in quantities of low-affinity penicillin-binding protein 4 (PBP4) or with amino acid substitutions in PBP4. We report an E. faecalis strain (LS4828) isolated from a prosthetic knee joint that was subjected to long-term exposure to aminopenicillins. Subsequent cultures yielded E. faecalis with MICs of penicillins and carbapenems higher than those for wild-type strain E. faecalis JH2-2. Sequence analysis of the pbp4 gene of LS4828 compared to that of JH2-2 revealed two point mutations with amino acid substitutions (V223I, A617T) and deletion of an adenine from the region upstream of the predicted pbp4 -35 promoter sequence (UP region)...
April 3, 2018: MBio
https://www.readbyqxmd.com/read/29572130/-i-was-really-sceptical-but-it-worked-really-well-a-qualitative-study-of-patient-perceptions-of-telephone-delivered-exercise-therapy-by-physiotherapists-for-people-with-knee-osteoarthritis
#9
B J Lawford, C Delany, K L Bennell, R S Hinman
OBJECTIVE: Physiotherapists typically prescribe exercise therapy for people with osteoarthritis (OA) via face-to-face consultations. This study aimed to explore peoples' perceptions of exercise therapy delivered by physiotherapists via telephone for their knee OA. DESIGN: A qualitative study (based on interpretivist methodology) embedded within a randomised controlled trial. Semi-structured individual interviews were conducted with 20 people with knee OA who had received exercise advice and support from one of eight physiotherapists via telephone over 6 months...
March 20, 2018: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/29566835/estimating-the-learning-curve-of-a-novel-medical-device-bipolar-sealer-use-in-unilateral-total-knee-arthroplasties
#10
Victoria Kuznietsova, Robert S Woodward
BACKGROUND: The use of cost-effectiveness analysis for medical devices has proven to be challenging because of the existence of the learning effects in the device-operator interactions. The need for the relevant analytical framework for assessing the economic value of such technologies has been recognized. OBJECTIVES: To present a modified difference-in-differences (DID) cost-effectiveness methodology that facilitates visualization of a new health technology's learning curve...
March 2018: Value in Health: the Journal of the International Society for Pharmacoeconomics and Outcomes Research
https://www.readbyqxmd.com/read/29555559/opening-wedge-high-tibial-osteotomy-without-bone-grafting-in-severe-varus-osteoarthritic-knee-rate-and-risk-factors-of-non-union-in-41-cases
#11
R Siboni, P Beaufils, P Boisrenoult, C Steltzlen, N Pujol
INTRODUCTION: Using locking plates in opening-wedge high tibial osteotomy (OWHTO) via a medial opening theoretically allows early weight-bearing without need for bone or bone-substitute grafting. It incurs a risk of non-consolidation in case of large correction (> 10°), although rates and risk factors of non-union are not known. The present retrospective study compared OWHTO with correction <10° versus >10°, with a view to determining: 1) complications rates (non-union) according to degree of correction, and 2) risk factors for such complications...
March 16, 2018: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/29525547/interactive-effect-of-femoral-posterior-condylar-offset-and-tibial-posterior-slope-on-knee-flexion-in-posterior-cruciate-ligament-substituting-total-knee-arthroplasty
#12
Hyuk-Soo Han, Seung-Baik Kang
BACKGROUND: This work aimed to evaluate the changes in the femoral posterior condylar offset (PCO) and tibial slope after posterior cruciate ligament (PCL)-substituting total knee arthroplasty (TKA), and to address the presence of any interactive effect between the two on knee flexion. METHODS: Fifty-two PCL-substituting TKAs were performed using a posterior referencing system. Three-dimensional reconstructed computed tomographic (CT) images were used to evaluate PCO and tibial slope before and after arthroplasty...
March 7, 2018: Knee
https://www.readbyqxmd.com/read/29525342/revision-of-unicompartmental-to-total-knee-arthroplasty-does-the-unicompartmental-implant-metal-backed-vs-all-polyethylene-impact-the-total-knee-arthroplasty
#13
Chloe E H Scott, Matilda F R Powell-Bowns, Deborah J MacDonald, Philip M Simpson, Frazer A Wade
BACKGROUND: The aim of this study is to investigate differences in implant requirement, outcomes, and re-revision when total knee arthroplasty (TKA) was performed following unicompartmental knee arthroplasties (UKAs) with metal-backed (MB) compared to all-polyethylene (AP) tibial components. METHODS: Retrospective study of 60 UKAs converted to 60 TKAs at mean 7.3 years (0.1 to 17) after implantation in 55 patients (mean age, 64 [49-83]; 44% male): 44 MB and 16 AP...
February 12, 2018: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29496070/correlation-of-size-dependent-conversion-factor-and-body-mass-index-using-size-specific-dose-estimates-formalism-in-ct-examinations
#14
Babak Alikhani, Tobias Getzin, Till Frederik Kaireit, Kristina Imeen Ringe, Leila Jamali, Frank Wacker, Thomas Werncke, Hans-Jürgen Raatschen
PURPOSE: The aim of this investigation is to establish the relationship between the size-dependent conversion factor (fsize ) and the body-mass-index (BMI) and to test whether BMI can be substituted for the conventionally used patients' anterior-posterior (AP) and lateral (LAT) dimensions for calculation of fsize . By calculating fsize on the basis of BMI instead of the AP and LAT measurements, size-specific dose estimates (SSDE) could be determined prior to image acquisition. METHODS: Our institute utilizes a dose monitoring software to record radiation exposure during CT examinations...
March 2018: European Journal of Radiology
https://www.readbyqxmd.com/read/29475414/stiffness-of-meniscus-tissue-depends-on-tibio-femoral-load-and-structural-integrity-of-the-meniscus-root
#15
Christian Stärke, Christoph Hubertus Lohmann, Sebastian Kopf
Development of meniscus replacements requires in-depth knowledge of the material properties and biomechanical behavior of the native meniscus. The compressive properties are of particular interest in this context, which are often assessed with indentation tests. However, those tests are usually done on isolated tissue specimens ex situ, which could have a significant impact on the results. It was, therefore, the goal of the study to assess the stiffness of the meniscus tissue in situ in porcine specimens and to compare it to that of artificial substitutes...
April 2018: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/29465260/the-effect-of-knee-ankle-foot-orthosis-stiffness-on-the-parameters-of-walking
#16
Sayed Mohammad Ali Abtahi, Nima Jamshidi, Aram Ghaziasgar
The purpose of this simulation study was to analyze the effect of variation in Knee-Ankle-Foot-Orthosis stiffness on the joint power and the energy cost of walking. The effect of contractile tissue was simulated using linear elastic spring and viscous dampers in knee and ankle joints. Then, joint angles, ground reaction force, were collected from Twenty chronic hemiparesis subjects (15 males and 5 females) and twenty control subjects (14 males and 6 females), and spring stiffness were considered as the inputs...
February 2018: Computer Methods in Biomechanics and Biomedical Engineering
https://www.readbyqxmd.com/read/29459998/posterior-stabilized-inserts-are-preferable-to-cruciate-substituting-ultracongruent-inserts-due-to-more-favourable-kinematics-and-stability
#17
Ji-Hoon Bae, Jung-Ro Yoon, Ju-Hyoung Sung, Young-Soo Shin
PURPOSE: It is unknown whether the conforming superiority of ultracongruent (UC) inserts over posterior stabilized (PS) inserts, due to an increased anterior lip for prevention of anterior displacement of the condyles during knee flexion, leads to better knee scores or greater knee stability in arthroplasty patients. This meta-analysis compared clinical outcomes, intraoperative kinematics, sagittal stability, and range of motion (ROM) between groups with either UC or PS inserts in primary total knee arthroplasty (TKA)...
February 19, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29428984/tibial-component-coverage-and-rotational-alignment-accuracy-after-mobile-bearing-total-knee-arthroplasty
#18
Yoshinori Ishii, Hideo Noguchi, Junko Sato, Hana Ishii, Koji Todoroki, Shin-Ichi Toyabe
BACKGROUND: Tibial component coverage (TCC) and tibial rotational angle (TRA) have been studied simultaneously in simulations, but not in clinical studies after total knee arthroplasty (TKA). The purposes of this study were (1) to evaluate TCC and rotational setting postoperatively in mobile-bearing TKA patients and (2) to compare the results with previously published simulation data. METHODS: We prospectively examined 100 patients who underwent primary TKA using the LCS® Total Knee System (LCS) posterior cruciate ligament-substituting prosthesis...
February 10, 2018: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/29399588/career-length-and-injury-incidence-after-anterior-cruciate-ligament-reconstruction-in-major-league-soccer-players
#19
Amelia Joanna Hanford Arundale, Holly Jacinda Silvers-Granelli, Lynn Snyder-Mackler
Background: Little is known about career length after anterior cruciate ligament (ACL) reconstruction in Major League Soccer (MLS), the top men's professional soccer league in the United States. Further, it is unspecified whether athletes returning to soccer after ACL reconstruction are at a higher risk for injuries, beyond new knee injuries. Purpose: To examine career length and the incidence of lower extremity injuries in MLS athletes after ACL reconstruction in comparison with age-matched controls...
January 2018: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29389790/femoral-component-varus-malposition-is-associated-with-tibial-aseptic-loosening-after-tka
#20
Bum-Sik Lee, Hyun-Ik Cho, Seong-Il Bin, Jong-Min Kim, Byeong-Kyu Jo
BACKGROUND: The notion that neutral alignment is mandatory to assure long-term durability after TKA has been based mostly on short-film studies. However, this is challenged by recent long-film studies. QUESTIONS/PURPOSES: We conducted this long-film study to know (1) whether the risk of aseptic revision for nontraumatic reasons was greater among knees with greater than 3° varus or valgus (defined as "outliers") than those that were aligned within 3° of neutral on long-standing mechanical axis (hip to knee) radiographs; and (2) what the failure mechanisms were and whether the malalignment was femoral or tibial in origin, or both, among those in the outlier group...
February 2018: Clinical Orthopaedics and related Research
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