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Knee biomechanics

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https://www.readbyqxmd.com/read/29770583/angle-stable-interlocking-intramedullary-nails-for-tibial-plateau-fractures
#1
Peng Jia, Feng-Cheng Lu, Kifayat Ullah, Man Zhang, Yan-Sheng Dong, Chao Xiong, Zhi-Hui Zhao, Jin-Feng Wang, Ju-Wen Chen, Yong-Qing Wang
OBJECTIVE: Angle stable interlocking intramedullary nail (ASIN), a novel technique, has rarely been used for treatment of tibial plateau fractures (TPF). This retrospective study was designed to introduce this novel technique, ASIN, as well as to describe the initial experience and verify the effectiveness when ASIN was used for the management for TPF. METHODS: A cohort of 19 cases with closed TPF aged from 18-70 years with at least 23 months follow-up from November 2008 to September 2013 was analyzed retrospectively...
May 16, 2018: Orthopaedic Surgery
https://www.readbyqxmd.com/read/29769833/effects-of-knee-alignments-and-toe-clip-on-frontal-plane-knee-biomechanics-in-cycling
#2
Guangping Shen, Songning Zhang, Hunter J Bennett, James C Martin, Scott E Crouter, Eugene C Fitzhugh
Effects of knee alignment on the internal knee abduction moment (KAM) in walking have been widely studied. The KAM is closely associated with the development of medial knee osteoarthritis. Despite the importance of knee alignment, no studies have explored its effects on knee frontal plane biomechanics during stationary cycling. The purpose of this study was to examine the effects of knee alignment and use of a toe clip on the knee frontal plane biomechanics during stationary cycling. A total of 32 participants (11 varus, 11 neutral, and 10 valgus alignment) performed five trials in each of six cycling conditions: pedaling at 80 rpm and 0...
June 2018: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/29768121/a-biomechanical-comparison-of-initial-sprint-acceleration-performance-and-technique-in-an-elite-athlete-with-cerebral-palsy-and-able-bodied-sprinters
#3
Ian N Bezodis, James Cowburn, Adam Brazil, Rhian Richardson, Cassie Wilson, Timothy A Exell, Gareth Irwin
Cerebral palsy is known to generally limit range of motion and force producing capability during movement. It also limits sprint performance, but the exact mechanisms underpinning this are not well known. One elite male T36 multiple-Paralympic sprint medallist (T36) and 16 well-trained able-bodied (AB) sprinters each performed 5-6 maximal sprints from starting blocks. Whole-body kinematics (250 Hz) in the block phase and first two steps, and synchronised external forces (1,000 Hz) in the first stance phase after block exit were combined to quantify lower limb joint kinetics...
May 16, 2018: Sports Biomechanics
https://www.readbyqxmd.com/read/29762541/biomechanical-gait-variable-estimation-using-wearable-sensors-after-unilateral-total-knee-arthroplasty
#4
Ik-Hyun Youn, Jong-Hoon Youn, Joseph A Zeni, Brian A Knarr
Total knee arthroplasty is a common surgical treatment for end-stage osteoarthritis of the knee. The majority of existing studies that have explored the relationship between recovery and gait biomechanics have been conducted in laboratory settings. However, seamless gait parameter monitoring in real-world conditions may provide a better understanding of recovery post-surgery. The purpose of this study was to estimate kinematic and kinetic gait variables using two ankle-worn wearable sensors in individuals after unilateral total knee arthroplasty...
May 15, 2018: Sensors
https://www.readbyqxmd.com/read/29761471/the-infrapatellar-fat-pad-and-the-synovial-membrane-an-anatomo-functional-unit
#5
REVIEW
Veronica Macchi, Elena Stocco, Carla Stecco, Elisa Belluzzi, Marta Favero, Andrea Porzionato, Raffaele De Caro
The infrapatellar pad, a fibro-adipose tissue with peculiar microscopic and mechanical features, is gaining wide attention in the field of rheumatological research. The purpose of this descriptive review is to summarize the most recent published evidence on the anatomic, physiologic and biomechanical inter-relationship between the infrapatellar fat pad and the knee synovial membrane. As an extrasynovial tissue, the infrapatellar fat pad does not directly interact with the articular cartilage; based on its location in close contact with the synovial membrane, and due to the metabolic properties of adipose tissue, it may influence the behavior of the synovial membrane...
May 14, 2018: Journal of Anatomy
https://www.readbyqxmd.com/read/29761113/differences-in-hip-joint-biomechanics-and-muscle-activation-in-individuals-with-femoroacetabular-impingement-compared-with-healthy-asymptomatic-individuals-is-level-ground-gait-analysis-enough
#6
Derek J Rutherford, Janice Moreside, Ivan Wong
Background: Femoroacetabular impingement (FAI) is a recognized cause of hip and groin pain and a significant factor in hip joint function during sport. Objective tests for understanding hip function are lacking in this population. Purpose: To determine whether biomechanical and electromyographic features of hip function during level-ground walking differ between a group diagnosed with FAI and those with no symptoms of FAI. Study Design: Controlled laboratory study...
May 2018: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29761106/current-strategies-and-future-directions-to-optimize-acl-reconstruction-in-adolescent-patients
#7
Dustin Jon Richter, Roger Lyon, Scott Van Valin, Xue-Cheng Liu
The incidence of anterior cruciate ligament (ACL) injuries in the pediatric population has risen in recent years. These injuries have historically presented a management dilemma in skeletally immature patients with open physes and significant growth remaining at time of injury. While those nearing skeletal maturity may be treated with traditional, transphyseal adult techniques, these same procedures risk iatrogenic damage to the growth plates and resultant growth disturbances in younger patients with open physes...
2018: Frontiers in Surgery
https://www.readbyqxmd.com/read/29760787/inverted-rearfoot-posture-in-subjects-with-coexisting-patellofemoral-osteoarthritis-in-medial-knee-osteoarthritis-an-exploratory-study
#8
Hirotaka Iijima, Hiroshi Ohi, Naoto Fukutani, Tomoki Aoyama, Eishi Kaneda, Kaoru Abe, Masaki Takahashi, Shuichi Matsuda
Background: While abnormal rearfoot posture and its relationship to patellofemoral (PF) pain has been thoroughly discussed in the literature, its relationship to patellofemoral osteoarthritis (PFOA) has not been determined. This study aimed to examine whether rearfoot posture is associated with a higher prevalence of radiographic PFOA in a compartment-specific manner in patients with medial tibiofemoral osteoarthritis (TFOA). Methods: Participants from orthopedic clinics ( n  = 68, age 56-90 years, 75...
2018: Journal of Foot and Ankle Research
https://www.readbyqxmd.com/read/29754495/evaluation-of-anterior-intermeniscal-ligament-in-discoid-lateral-meniscus-cases-and-presenting-the-accompanying-meniscal-pathologies-with-mri
#9
Ali Koç, Turgut Tursem Tokmak, Özgür Karabıyık, Gamze Türk
Background Although several studies were conducted to put forth the biomechanical function of anterior intermeniscal ligament (AIML) on the stability of meniscal structures, there are few data on the etiology of the early degeneration of discoid type compared to the normal shaped ones. Purpose To determine the AIML subtypes and accompanying meniscal pathologies in discoid lateral menisci (DLM) on knee MRI exams. Material and Methods Knee MRI exams of 171 individuals with DLM were reviewed. DLMs and AIMLs were typed according to Watanabe's classification and Nelson-Laprade classification, respectively...
January 1, 2018: Acta Radiologica
https://www.readbyqxmd.com/read/29752501/it-is-safe-and-effective-to-use-all-inside-meniscal-repair-devices-for-posteromedial-meniscal-ramp-lesions
#10
Giles Heilpern, Jo Stephen, Simon Ball, Andrew Amis, Andy Williams
PURPOSE: Recently, it has been recognized that meniscocapsular ('ramp') lesions of the posterior one-third of the medial meniscus frequently occur during injuries causing ACL rupture, and that these lesions are easily missed at arthroscopy. Furthermore, it is clear that these lesions are biomechanically significant, adding to the deficits caused by ACL rupture, and that their repair can reverse this. The efficacy of an all inside repair technique has been questioned by some authors and by those who advocate a suture shuttle technique via an accessory posteromedial portal...
May 12, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29752054/spatiotemporal-and-kinematic-changes-in-gait-while-carrying-an-energy-harvesting-assault-pack-system
#11
Maria K Talarico, Courtney A Haynes, Julianne S Douglas, Jose Collazo
Soldiers are fielded with a variety of equipment including battery powered electronic devices. An energy harvesting assault pack (EHAP) was developed to provide a power source to recharge batteries and reduce the quantity and load of extra batteries carried into the field. Little is known about the biomechanical implications of carrying a suspended-load energy harvesting system compared to the military standard assault pack (AP). Therefore, the goal of this study was to determine the impact of pack type and load magnitude on spatiotemporal and kinematic parameters while walking at 1...
May 3, 2018: Journal of Biomechanics
https://www.readbyqxmd.com/read/29752053/anterior-laxity-lateral-tibial-slope-and-in-situ-acl-force-differentiate-knees-exhibiting-distinct-patterns-of-motion-during-a-pivoting-event-a-human-cadaveric-study
#12
Robert N Kent, Mark J Amirtharaj, Brendan M Hardy, Andrew D Pearle, Thomas L Wickiewicz, Carl W Imhauser
Knee instability following anterior cruciate ligament (ACL) rupture compromises function and increases risk of injury to the cartilage and menisci. To understand the biomechanical function of the ACL, previous studies have primarily reported the net change in tibial position in response to multiplanar torques, which generate knee instability. In contrast, we retrospectively analyzed a cohort of 13 consecutively tested cadaveric knees and found distinct motion patterns, defined as the motion of the tibia as it translates and rotates from its unloaded, initial position to its loaded, final position...
April 11, 2018: Journal of Biomechanics
https://www.readbyqxmd.com/read/29746965/spine-and-lower-extremity-kinematics-during-gait-in-cervical-spondylotic-myelopathy-patients
#13
Ram Haddas, Sujal Patel, Raj Arakal, Akwasi Boah, Theodore Belanger, Kevin L Ju
BACKGROUND CONTEXT: CSM typically manifests with a slow, progressive stepwise decline in neurologic function, including hand clumsiness and balance difficulties. Gait disturbances are frequently seen in CSM patients, with more advanced cases exhibiting a stiff, spastic gait. PURPOSE: To evaluate the spatiotemporal parameters and spine and lower extremity kinematics during the gait cycle of adult cervical spondylotic myelopathy (CSM) patients prior to surgical intervention...
May 7, 2018: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/29745598/-motion-analysis-on-patients-with-knee-osteoarthritis-merged-with-varus-deformity
#14
Zhengfei Zhu, Ling Wang, Dichen Li, Hanghui Wang, Zhongmin Jin, Zhiyuan Wang, Shuguo Hui, Chenglin Chen, Shu Zhang, Wenjiao Li
Aiming at comparing the pre-operative and post-operative gait characteristics and therefore establishing post-operative rehabilitation guidance for patients with end-stage knee osteoarthritis (KOA) merged with varus deformity, this study captured the level walking and sit-to-stand trials of 9 patients with 3-dimensional motion analysis system and after which musculoskeletal multi-body dynamic analysis was conducted. The study indicated that the average range of motion (ROM) of the proposed-surgical knee was 24...
February 1, 2018: Sheng Wu Yi Xue Gong Cheng Xue za Zhi, Journal of Biomedical Engineering, Shengwu Yixue Gongchengxue Zazhi
https://www.readbyqxmd.com/read/29736568/emerging-concepts-in-treating-cartilage-osteochondral-defects-and-osteoarthritis-of-the-knee-and-ankle
#15
Hélder Pereira, Ibrahim Fatih Cengiz, Carlos Vilela, Pedro L Ripoll, João Espregueira-Mendes, J Miguel Oliveira, Rui L Reis, C Niek van Dijk
The management and treatment of cartilage lesions, osteochondral defects, and osteoarthritis remain a challenge in orthopedics. Moreover, these entities have different behaviors in different joints, such as the knee and the ankle, which have inherent differences in function, biology, and biomechanics. There has been a huge development on the conservative treatment (new technologies including orthobiologics) as well as on the surgical approach. Some surgical development upraises from technical improvements including advanced arthroscopic techniques but also from increased knowledge arriving from basic science research and tissue engineering and regenerative medicine approaches...
2018: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29734501/using-multidimensional-topological-data-analysis-to-identify-traits-of-hip-osteoarthritis
#16
Jasmine Rossi-deVries, Valentina Pedoia, Michael A Samaan, Adam R Ferguson, Richard B Souza, Sharmila Majumdar
BACKGROUND: Osteoarthritis (OA) is a multifaceted disease with many variables affecting diagnosis and progression. Topological data analysis (TDA) is a state-of-the-art big data analytics tool that can combine all variables into multidimensional space. TDA is used to simultaneously analyze imaging and gait analysis techniques. PURPOSE: To identify biochemical and biomechanical biomarkers able to classify different disease progression phenotypes in subjects with and without radiographic signs of hip OA...
May 7, 2018: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29730857/the-role-of-osteotomy-for-the-treatment-of-pcl-injuries
#17
REVIEW
João V Novaretti, Andrew J Sheean, Jayson Lian, Joseph De Groot, Volker Musahl
PURPOSE OF REVIEW: The purposes of this review are to (1) describe the anatomic and biomechanical rationale for high tibial osteotomy (HTO) in the setting of posterior cruciate ligament (PCL) deficiency, (2) review the indications for concomitant HTO and PCL reconstruction, (3) provide guidance for the clinical assessment of the patient with suspected PCL deficiency, and (4) summarize the key surgical steps necessary to attain the appropriate sagittal and coronal plane corrections. RECENT FINDINGS: The preponderance of available biomechanical data pertaining to the PCL-deficient knee suggests that an increased proximal tibial slope limits posterior tibial translation under axial compressive loads...
May 5, 2018: Current Reviews in Musculoskeletal Medicine
https://www.readbyqxmd.com/read/29729766/editorial-commentary-medial-meniscal-ramp-lesions-lessons-learned-from-the-past-in-the-pursuit-of-evidence
#18
EDITORIAL
Romain Seil
Thirty-five years after their initial description, ramp lesions of the medial meniscus in anterior cruciate ligament (ACL)-deficient knees are slowly being rediscovered. Routinely repaired in open ACL and peripheral reconstructions before the era of arthroscopic ACL reconstruction, ramp lesions have been largely ignored in the last 2 decades. Following the growing number of studies analyzing the causes of residual laxity after ACL reconstructions over the last decade, ramp lesions are increasingly being implicated, and thus investigated, but remain poorly understood...
May 2018: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/29729612/joint-kinematics-and-ground-reaction-forces-in-overground-versus-treadmill-graded-running
#19
Colin R Firminger, Gianluca Vernillo, Aldo Savoldelli, Darren J Stefanyshyn, Guillaume Y Millet, W Brent Edwards
BACKGROUND: Treadmills are often used to assess running biomechanics, however the validity of applying results from treadmill graded running to overground graded running is currently unknown. RESEARCH QUESTION: The purpose of this study was to investigate whether treadmill and overground graded running have comparable kinematics and ground reaction force parameters. METHODS: Eleven healthy male adults ran overground and on an instrumented treadmill as motion capture and force platform data were collected for the following conditions: downhill running at a slope of -8° at 10, 13 and 16 km⋅h-1 ; level running at 10 and 13 km⋅h-1 ; uphill running at a slope of +8° at 8, 10 and 13 km⋅h-1 ...
April 26, 2018: Gait & Posture
https://www.readbyqxmd.com/read/29723652/kinetic-differences-between-level-walking-and-ramp-descent-in-individuals-with-unilateral-transfemoral-amputation-using-a-prosthetic-knee-without-a-stance-control-mechanism
#20
Yusuke Okita, Nobuya Yamasaki, Takashi Nakamura, Tsutomu Kubo, Atsuko Mitsumoto, Toru Akune
BACKGROUND: Individuals with transfemoral amputation (TFA) have difficulty in descending ramps. Although individuals with TFA who descend ramps are speculated to have greater biomechanical demands, this has not been quantified. RESEARCH QUESTION: How do individuals with TFA wearing a prosthetic knee without a stance control mechanism adapt their gait biomechanics to a slightly declined surface? METHODS: We retrospectively analyzed data of level walking and ramp descent (5° decline) from six subjects with TFA who used a prosthesis without a stance control mechanism...
April 26, 2018: Gait & Posture
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