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Knee biomechanics

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https://www.readbyqxmd.com/read/28730871/effects-of-timing-of-signal-indicating-jump-directions-on-knee-biomechanics-in-jump-landing-jump-tasks
#1
Mitchell L Stephenson, Taylour J Hinshaw, Haley A Wadley, Qin Zhu, Margaret A Wilson, Mark Byra, Boyi Dai
A variety of the available time to react (ATR) has been utilised to study knee biomechanics during reactive jump-landing tasks. The purpose was to quantify knee kinematics and kinetics during a jump-land-jump task of three possible directions as the ATR was reduced. Thirty-four recreational athletes performed 45 trials of a jump-land-jump task, during which the direction of the second jump (lateral, medial or vertical) was indicated before they initiated the first jump, the instant they initiated the first jump, 300 ms before landing, 150 ms before landing or at the instant of landing...
July 21, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/28728959/mechanisms-contributing-to-gait-speed-and-metabolic-cost-in-children-with-unilateral-cerebral-palsy
#2
Tatiana Pessoa Silva Pinto, Sérgio Teixeira Fonseca, Rejane Vale Gonçalves, Thales Rezende Souza, Daniela Virgínia Vaz, Paula Lanna Pereira Silva, Marisa Cotta Mancini
BACKGROUND: Gait speed and metabolic cost are indicators of functional capacity in children with cerebral palsy. Uncovering their mechanisms helps guide therapeutic actions. OBJECTIVES: To investigate the contributions of energy-generating and energy-conserving mechanisms to gait speed and metabolic cost of children with unilateral cerebral palsy. METHODS: Data on eccentric and concentric muscle work, co-contraction, elastic torque and vertical stiffness of the affected-limb, forcing torque of the non-affected limb, gait speed and metabolic cost were collected from 14 children with unilateral cerebral palsy, aged 6-12 years...
July 5, 2017: Brazilian Journal of Physical Therapy
https://www.readbyqxmd.com/read/28726574/rise-of-the-pigs-utilization-of-the-porcine-model-to-study-musculoskeletal-biomechanics-and-tissue-engineering-during-skeletal-growth
#3
Stephanie G Cone, Paul B Warren, Matthew B Fisher
Large animal models play an essential role in the study of tissue engineering and regenerative medicine as well as biomechanics.  The porcine model has been increasingly used to study the musculoskeletal system, including specific joints, such as the knee and temporomandibular joints, and tissues, such as bone, cartilage, and ligaments. In particular, pigs have been utilized to evaluate the role of skeletal growth on the biomechanics and engineered replacements of these joints and tissues. In this review, we explore the publication history of the use of pig models in biomechanics, tissue engineering, and regenerative medicine studies, discuss inter-species comparative studies, highlight studies on the effect of skeletal growth and other biological considerations in the porcine model, and present challenges and emerging opportunities for using this model to study functional tissue engineering and regenerative medicine...
July 20, 2017: Tissue Engineering. Part C, Methods
https://www.readbyqxmd.com/read/28723822/biomechanical-differences-in-female-basketball-and-soccer-players-during-multi-directional-jump-landings
#4
Jeffrey B Taylor, Kevin R Ford, Randy J Schmitz, Scott E Ross, Terry A Ackerman, Sandra J Shultz
Anterior cruciate ligament injury prevention programs are less successful in basketball than soccer and may be due to distinct movement strategies that these athletes develop from sport-specific training. The purpose of this study was to identify biomechanical differences between female basketball and soccer players during multi-directional jump landings. Lower extremity biomechanics of eighty-nine female athletes who played competitive basketball (n=40) or soccer (n=49) at the middle- or high-school level were analyzed with three-dimensional motion analysis during a drop vertical jump (DVJ), double- (SAG-DL) and single-leg forward jump (SAG-SL), and double- (FRONT-DL) and single-leg (FRONT-SL) lateral jump...
July 14, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28722467/the-influence-of-lower-extremity-lean-mass-on-landing-biomechanics-during-prolonged-exercise
#5
Melissa M Montgomery, Amanda J Tritsch, John R Cone, Randy J Schmitz, Robert Henson, Sandra J Shultz
CONTEXT:   The extent to which lower extremity lean mass (LELM) relative to total body mass influences one's ability to maintain safe landing biomechanics during prolonged exercise when injury incidence increases is unknown. OBJECTIVES:   To examine the influence of LELM on (1) pre-exercise lower extremity biomechanics and (2) changes in biomechanics during an intermittent exercise protocol (IEP) and (3) determine whether these relationships differ by sex. We hypothesized that less LELM would predict higher-risk baseline biomechanics and greater changes toward higher-risk biomechanics during the IEP...
July 19, 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/28719939/biomechanics-and-microstructural-analysis-of-the-mouse-knee-and-ligaments
#6
Camila B Carballo, Ian D Hutchinson, Zoe M Album, Michael J Mosca, Arielle Hall, Scott Rodeo, Liang Ying, Xiang-Hua Deng, Scott A Rodeo
No abstract text is available yet for this article.
July 18, 2017: Journal of Knee Surgery
https://www.readbyqxmd.com/read/28717621/effects-of-the-menstrual-cycle-on-lower-limb-biomechanics-neuromuscular-control-and-anterior-cruciate-ligament-injury-risk-a-systematic-review
#7
REVIEW
Vivek Balachandar, Jan-Luigi Marciniak, Owen Wall, Chandrika Balachandar
OBJECTIVE: Anterior cruciate ligament (ACL) injury has a devastating impact on physical and psychological disability. Rates of ACL rupture are significantly greater in females than males during the same sports. Hormonal mechanisms have been proposed but are complex and poorly understood. This systematic review evaluates the effects of menstrual cycle on: 1) lower-limb biomechanics, 2) neuromuscular control, and 3) ACL injury risk. METHODS: The MEDLINE, CINAHL, SPORTSDiscus, Web of Science, and Google Scholar databases were searched from inception to August 2016 for studies investigating the effects of the menstrual cycle on lower-limb biomechanics, neuromuscular control, and ACL injury risk in females...
January 2017: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/28717620/the-influence-of-muscle-tendon-forces-on-acl-loading-during-jump-landing-a-systematic-review
#8
REVIEW
Katja Oberhofer, S H Hosseini Nasab, Pascal Schütz, Barbara Postolka, Jess G Snedeker, William R Taylor, Renate List
BACKGROUND: The goal of this review is to summarise and discuss the reported influence of muscle-tendon forces on anterior cruciate ligament (ACL) loading during the jump-landing task by means of biomechanical analyses of the healthy knee. METHODS: A systematic review of the literature was conducted using different combinations of the terms "knee", "ligament", "load", "tension ", "length", "strain", "elongation" and "lengthening". 26 original articles (n=16 in vitro studies; n=10 in situ studies) were identified which complied with all inclusion/exclusion criteria...
January 2017: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/28714786/effects-of-a-prophylactic-knee-sleeve-on-anterior-cruciate-ligament-loading-during-sport-specific-movements
#9
Jonathan Sinclair, Paul John Taylor
CONTEXT: Prophylactic knee bracing is extensively utilized in athletic populations, to reduce the high risk from knee injuries, but their role in the attenuation of anterior cruciate ligament (ACL) pathologies is not well understood. OBJECTIVE: The aim of the current investigation was to investigate the effects of a prophylactic knee sleeve on ACL loading parameters linked to the aetiology of injury in recreational athletes. SETTING: Laboratory...
July 17, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/28713536/neuromuscular-taping-application-in-counter-movement-jump-biomechanical-insight-in-a-group-of-healthy-basketball-players
#10
Giuseppe Marcolin, Alessandro Buriani, Andrea Giacomelli, David Blow, Davide Grigoletto, Marco Gesi
Kinesiologic elastic tape is widely used for both clinical and sport applications although its efficacy in enhancing agonistic performance is still controversial. Aim of the study was to verify in a group of healthy basketball players whether a neuromuscular taping application (NMT) on ankle and knee joints could affect the kinematic and the kinetic parameters of the jump, either by enhancing or inhibiting the functional performance. Fourteen healthy male basketball players without any ongoing pathologies at upper limbs, lower limbs and trunk volunteered in the study...
June 24, 2017: European Journal of Translational Myology
https://www.readbyqxmd.com/read/28712025/side-to-side-asymmetries-in-landing-mechanics-from-a-drop-vertical-jump-test-are-not-related-to-asymmetries-in-knee-joint-laxity-following-anterior-cruciate-ligament-reconstruction
#11
Christophe A G Meyer, Paul Gette, Caroline Mouton, Romain Seil, Daniel Theisen
PURPOSE: Asymmetries in knee joint biomechanics and increased knee joint laxity in patients following anterior cruciate ligament reconstruction (ACLR) are considered risk factors for re-tear or early onset of osteoarthritis. Nevertheless, the relationship between these factors has not been established. The aim of the study was to compare knee mechanics during landing from a bilateral drop vertical jump in patients following ACLR and control participants and to study the relationship between side-to-side asymmetries in landing mechanics and knee joint laxity...
July 15, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28707122/segond-s-fracture-a-biomechanical-cadaveric-study-using-navigation
#12
E Monaco, Daniele Mazza, A Redler, D Lupariello, R Lanzetti, M Guzzini, A Ferretti
BACKGROUND: Segond's fracture is a well-recognised radiological sign of an anterior cruciate ligament (ACL) tear. While previous studies evaluated the role of the anterolateral ligament (ALL) and complex injuries on rotational stability of the knee, there are no studies on the biomechanical effect of Segond's fracture in an ACL deficient knee. The aim of this study was to evaluate the effect of a Segond's fracture on knee rotation stability as evaluated by a navigation system in an ACL deficient knee...
July 13, 2017: Journal of Orthopaedics and Traumatology: Official Journal of the Italian Society of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/28706823/joint-preservation-surgery-for-medial-compartment-osteoarthritis
#13
Deepak Goyal, Anjali Goyal, Nobuo Adachi
Single compartment osteoarthritis is a commonly encountered condition in the middle-aged population, with the medial compartment being the most commonly involved compartment. Medial compartment osteoarthritis becomes seriously disabling for these active patients, with a very few definitive solutions. These patients quickly stop responding to the conservative methods such as lifestyle modification, drugs, physiotherapy, and rehab programs. Less invasive procedures such as intra-articular injections or joint debridement also do not give a long-lasting relief...
June 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28706801/combined-anatomic-reconstruction-of-the-anterior-cruciate-and-anterolateral-ligaments-using-hamstring-graft-through-a-single-femoral-tunnel-and-with-a-single-femoral-fixation
#14
Assem Mohamed Noureldin Zein, Mohamed Ali, Hesham Ali, Ahmed Nady Saleh Elsaid, Alaa Zenhom Mahmoud, Mohamed K Osman, Amr Mohamed Mohamed Soliman
Patients with complete anterior cruciate ligament (ACL) injury have different degrees of rotational (internal rotation) laxity. A residual pivot shift has been found to be positive in more than 15% of cases after an accurate ACL reconstruction. Improved understanding of the existence, function, and biomechanical role of the anterolateral ligament (ALL) in controlling rotational instability of the knee has redirected and refocused attention on a supplemental extra-articular reconstruction of the ALL in conjunction with the intra-articular ACL reconstruction so as to restore normal kinematics of the knee...
June 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28706794/notchplasty-for-the-arthroscopic-treatment-of-limited-knee-extension
#15
Marcio B Ferrari, Sandeep Mannava, Nicholas DePhillipo, George Sanchez, Robert F LaPrade
Knee osteoarthritis may lead to narrowing of the intercondylar notch due to osteophyte formation, thereby causing changes in native knee biomechanics. The normal close contact between the condyles and the anterior cruciate ligament (ACL) during knee extension may be compromised due to narrowing of the notch and result in ACL damage, progression of knee osteoarthritis, and loss of knee extension. Outcomes after a notchplasty procedure are well reported for ACL reconstruction in young patients. However, there remains a lack of studies evaluating this procedure in the setting of knee osteoarthritis in patients with a symptomatic loss of knee extension...
June 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28704344/effects-of-altering-trunk-position-during-landings-on-patellar-tendon-force-and-pain
#16
Rodrigo Scattone Silva, Craig R Purdam, Angela M Fearon, Wayne A Spratford, Claire Kenneally-Dabrowski, Peter Preston, Fábio V Serrão, James E Gaida
PURPOSE: To verify the immediate effects of altering sagittal plane trunk position during jump-landings on lower limb biomechanics, patellar tendon force and pain of athletes with and without patellar tendinopathy. METHODS: Twenty-one elite male athletes were categorized into 3 groups, athletes with patellar tendinopathy (TG, n=7), asymptomatic athletes with patellar tendon abnormalities (AG, n=7) and asymptomatic athletes without tendon abnormalities (CG, n=7)...
July 12, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28698929/favourable-alignment-outcomes-with-mri-based-patient-specific-instruments-in-total-knee-arthroplasty
#17
REVIEW
Martijn G M Schotanus, Elke Thijs, Marion Heijmans, Rein Vos, Nanne P Kort
PURPOSE: Patient-specific instruments (PSIs) are already in relatively common use, and their post-operative radiographic results are equal to those for total knee arthroplasty (TKA) with conventional instrumentation. PSI use requires a preoperative MRI scan, CT scan, or a combination of MRI and a long-leg standing radiograph. However, there is no consensus as to which of these modalities, MRI or CT, is the preferred imaging modality when performing TKA with PSIs. METHODS: This systematic literature review and meta-analysis studied the differences in alignment outliers between CT- and MRI-based PSI for TKA...
July 11, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28697071/orif-patella-fracture-with-a-tension-band-construct
#18
Laura Blum, Mark Hake
Patellar fractures can occur as a result of direct or indirect injuries. Indirect injury is more common and occurs when the patella fails in tension when the force exerted by the extensor mechanism exceeds that of the bone. Common mechanism of indirect injury is rapid knee flexion with fully contracted quadriceps muscle. Treatment with a tension band construct is indicated for transverse patella fractures without significant comminution. This can be performed with 18-gauge wire and either 2 parallel, longitudinally oriented cannulated screws or 2 Kirschner wires...
August 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/28694684/comparison-of-joint-loading-in-badminton-lunging-between-professional-and-amateur-badminton-players
#19
Lin Fu, Feng Ren, Julien S Baker
The knee and ankle are the two most injured joints associated with the sport of badminton. This study evaluates biomechanical factors between professional and amateur badminton players using an injury mechanism model. The aim of this study was to investigate the kinematic motion and kinetic loading differences of the right knee and ankle while performing a maximal right lunge. Amateur players exhibited greater ankle range of motion (p < 0.05, r = 0.89) and inversion joint moment (p < 0.05, r = 0.54) in the frontal plane as well as greater internal joint rotation moment (p < 0...
2017: Applied Bionics and Biomechanics
https://www.readbyqxmd.com/read/28689828/influence-of-humeral-head-material-on-wear-performance-in-anatomic-shoulder-joint-arthroplasty
#20
Ulrike Mueller, Steffen Braun, Stefan Schroeder, Mark Schroeder, Robert Sonntag, Sebastian Jaeger, Jan Philippe Kretzer
BACKGROUND: The number of total shoulder arthroplasties has increased in the past years, with encouraging results. However, the survival of anatomic total shoulder arthroplasty (aTSA) is lower compared with that of knee and hip replacements. Wear-associated problems like loosening are well-known causes of long-term failure of aTSA. The main purpose of this study was to investigate the wear behavior of ceramic-polyethylene bearings compared with the standard metal-polyethylene bearings...
July 6, 2017: Journal of Shoulder and Elbow Surgery
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