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https://www.readbyqxmd.com/read/28644677/young-athletes-after-anterior-cruciate-ligament-reconstruction-with-single-leg-landing-asymmetries-at-the-time-of-return-to-sport-demonstrate-decreased-knee-function-2-years-later
#1
Matthew P Ithurburn, Mark V Paterno, Kevin R Ford, Timothy E Hewett, Laura C Schmitt
BACKGROUND: Previous work shows that young athletes after anterior cruciate ligament reconstruction (ACLR) demonstrate single-leg (SL) landing movement asymmetries at the time of return to sport (RTS); however, the effect of movement asymmetries on longitudinal knee-related function after ACLR has not been examined. Hypothesis/Purpose: The purpose of this study was to examine the effect of SL drop-landing movement symmetry at the time of RTS on knee-related function 2 years later in young athletes after ACLR...
June 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28644193/heel-raised-foot-posture-do-not-affect-trunk-and-lower-extremity-biomechanics-during-a-barbell-back-squat-in-recreational-weightlifters
#2
Szu-Ping Lee, Carrie Gillis, Javier J Ibarra, Derek Oldroyd, Ryan Zane
It is claimed that weightlifting shoes with a raised heel may lead to a more upright trunk posture, and thus reduce the risk of back injuries during a barbell back squat. These proclaimed biomechanical effects have not been thoroughly investigated. The purpose of this study was to compare trunk and lower extremity biomechanics during barbell back squats in 3 foot postures.14 recreational weightlifters (7 male and 7 female) between the ages of 18-50 performed barbell back squats in 3 conditions (barefoot on a flat surface, barefoot on a heel-raised platform, and wearing heel-raised weightlifting shoes) at 80% of their 1-RM...
June 19, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28643103/patient-age-as-a-preoperative-factor-associated-with-tunnel-enlargement-following-double-bundle-anterior-cruciate-ligament-reconstruction-using-hamstring-tendon-autografts
#3
Shinya Yanagisawa, Masashi Kimura, Keiichi Hagiwara, Atsuko Ogoshi, Tomoyuki Nakagawa, Hiroyuki Shiozawa, Takashi Ohsawa
PURPOSE: A few studies have detected associations of post-operative tunnel enlargement with sex, age, and the timing of anterior cruciate ligament reconstruction (ACLR). The aim of the present study was to investigate the correlation between post-operative tunnel enlargement following ACLR using hamstring tendon autografts and preoperative factors. The authors hypothesized that tunnel enlargement is associated with age in patients undergoing ACLR. METHODS: One hundred and six patients (male, n = 57; female, n = 49; mean age, 26...
June 22, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28642657/negative-pressure-wound-therapy-in-the-treatment-of-complex-injuries-after-total-knee-arthroplasty
#4
Camilo Partezani Helito, Daniel Kamura Bueno, Pedro Nogueira Giglio, Marcelo Batista Bonadio, José Ricardo Pécora, Marco Kawamura Demange
OBJECTIVE: To present an experience with negative-pressure wound therapy (NPWT) in the treatment of surgical wounds in patients treated for infections after total knee arthroplasty (TKA) with or without dehiscence and prophylaxis in wounds considered at risk of healing problems. METHODS: We prospectively evaluated patients with TKA infection with or without surgical wound dehiscence and patients with risk factors for infection or surgical wound complications treated with Pico((r)) device for NPWT in addition to standard treatment of infection or dehiscence in our institution...
March 2017: Acta Ortopedica Brasileira
https://www.readbyqxmd.com/read/28642097/are-two-dimensional-measured-frontal-plane-angles-related-to-three-dimensional-measured-kinematic-profiles-during-running
#5
Bart Dingenen, Filip F Staes, Lieselot Santermans, Lien Steurs, Maarten Eerdekens, Jurre Geentjens, Koen H E Peers, Maarten Thysen, Kevin Deschamps
OBJECTIVES: To investigate the temporal relationship between two-dimensional measured frontal plane joint angles and three-dimensional measured kinematic profiles during the stance phase of running, and to assess the intra- and intertester reliability of the two-dimensional angles. DESIGN: Observational study. SETTING: Research laboratory. PARTICIPANTS: Fifteen injury-free elite athletes. MAIN OUTCOME MEASURES: Contralateral pelvic drop (CPD), femoral adduction (FA), hip adduction (HA) and knee valgus (KV) were measured at the deepest landing position during midstance with two-dimensional video analysis during running...
March 4, 2017: Physical Therapy in Sport
https://www.readbyqxmd.com/read/28641058/acute-kinematics-changes-in-marathon-runners-using-different-footwear
#6
Tania Socorro Amorim Soares, Camila Fonseca de Oliveira, Federico Pizzuto, Rui Manuel Garganta, João Paulo Vila-Boas, Mario Casimiro da Anunciação Paiva
The effects of running with or without shoes on injury prevention have been extensively studied, and several investigations have assessed biomechanical differences between them. However, findings are not consensual and further insights on biomechanical load associated with differently shod or barefoot conditions may be needed. This study aimed to observe if habitually shod marathon runners show acute alterations when running barefoot or with minimalist shoes, and to determine whether the running kinematical adaptations of wearing minimalist shoes were similar to barefoot running...
June 22, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28639442/weightbearing-ankle-dorsiflexion-range-of-motion-and-sagittal-plane-kinematics-during-single-leg-drop-jump-landing-in-healthy-male-athletes
#7
Brittany Dowling, April L McPherson, James M Paci
BACKGROUND: Passive ankle dorsiflexion range of motion (DROM) measures have been identified as a risk factor for injury during landings. However, passive measurements might not be indicative of dynamic ankle movement, whereas a weightbearing ROM might be a better tool when evaluating movement. The purpose of this study was to investigate the relationship between weightbearing DROM and sagittal plane landing mechanics in a single leg drop jump task. METHODS: 73 male athletes (22...
June 21, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28639008/evaluation-of-running-knotless-barbed-suture-for-capsular-closure-in-primary-total-knee-arthroplasty-for-osteoarthritis-a-prospective-randomized-study
#8
Rajesh Malhotra, Vaibhav Jain, Vijay Kumar, Deepak Gautam
AIMS: This study was conducted to compare the barbed vs. traditional suture technique in capsular closure of total knee arthroplasty in terms of closure time, cost, needle prick injury, post-operative complication, blood loss and post-operative function. PATIENTS AND METHODS: Eighty patients in a barbed suture group and 90 in a traditional group were enrolled in this prospective randomized study. RESULTS: Barbed suture was associated with 4...
June 21, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28636254/pirfenidone-reduces-subchondral-bone-loss-and-fibrosis-after-murine-knee-cartilage-injury
#9
Deva D Chan, Jun Li, Wei Luo, Dan N Predescu, Brian J Cole, Anna Plaas
Pirfenidone is an anti-inflammatory and anti-fibrotic drug that has shown efficacy in lung and kidney fibrosis. Because inflammation and fibrosis have been linked to the progression of osteoarthritis, we investigated the effects of oral Pirfenidone in a mouse model of cartilage injury, which results in chronic inflammation and joint-wide fibrosis in mice that lack hyaluronan synthase 1 (Has1(-/-) ) in comparison to wild-type. Femoral cartilage was surgically injured in wild-type and Has1(-/-) mice, and Pirfenidone was administered in food starting after 3 days...
June 21, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28633185/erratum-the-prevalence-of-cruciate-ligament-and-meniscus-knee-injury-in-young-adults-and-associations-with-gender-body-mass-index-and-height-a-large-cross-sectional-study
#10
Ran Thein, Oded Hershkovich, Barak Gordon, Gideon Burstein, Shay Tenenbaum, Estela Derazne, Dorit Tzur, Ari Shamis, Arnon Afek, Yitshak Kreiss
No abstract text is available yet for this article.
June 20, 2017: Journal of Knee Surgery
https://www.readbyqxmd.com/read/28633148/clinical-and-functional-results-of-119-patients-with-knee-dislocations
#11
Nicholas R Scarcella, Douglas S Weinberg, Stephen Bowen, Heather A Vallier
OBJECTIVES: To describe clinical results and functional outcomes of knee dislocations treated with a consistent strategy within our institution. DESIGN: Retrospective case series. SETTING: Level 1 trauma center. PATIENTS: One hundred nineteen patients were treated at one institution between 2000 and 2014 for knee dislocation. MAIN OUTCOME MEASUREMENTS: Knee range of motion, functional instability, and complications were recorded...
July 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/28632776/dynamic-knee-valgus-alignment-influences-impact-attenuation-in-the-lower-extremity-during-the-deceleration-phase-of-a-single-leg-landing
#12
Akihiro Tamura, Kiyokazu Akasaka, Takahiro Otsudo, Jyunya Shiozawa, Yuka Toda, Kaori Yamada
Dynamic knee valgus during landings is associated with an increased risk of non-contact anterior cruciate ligament (ACL) injury. In addition, the impact on the body during landings must be attenuated in the lower extremity joints. The purpose of this study was to investigate landing biomechanics during landing with dynamic knee valgus by measuring the vertical ground reaction force (vGRF) and angular impulses in the lower extremity during a single-leg landing. The study included 34 female college students, who performed the single-leg drop vertical jump...
2017: PloS One
https://www.readbyqxmd.com/read/28632061/the-effect-of-unilateral-arm-swing-motion-on-lower-extremity-running-mechanics-associated-with-injury-risk
#13
Cristine Agresta, Christian R Ward, W Geoffrey Wright, Carole A Tucker
Many field sports involve equipment that restricts one or both arms from moving while running. Arm swing during running has been examined from a biomechanical and physiologic perspective but not from an injury perspective. Moreover, only bilateral arm swing suppression has been studied with respect to running. The purpose of this study was to determine the influence of running with one arm restrained on lower extremity mechanics associated with running or sport-related injury. Fifteen healthy participants ran at a self-selected speed with typical arm swing, with one arm restrained and with both arms restrained...
February 28, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/28632060/the-collision-forces-and-lower-extremity-inter-joint-coordination-during-running
#14
Li-I Wang, Chin-Yi Gu, I-Lin Wang, Sheng-Wun Siao, Szu-Ting Chen
The purpose of this study was to compare the lower extremity inter-joint coordination of different collision forces runners during running braking phase. A dynamical system approach was used to analyse the inter-joint coordination parameters. Data were collected with six infra-red cameras and two force plates. According to the impact peak of the vertical ground reaction force, twenty habitually rearfoot-strike runners were categorised into three groups: high collision forces runners (HF group, n = 8), medium collision forces runners (MF group, n = 5), and low collision forces runners (LF group, n = 7)...
February 28, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/28632053/the-effect-of-a-secondary-cognitive-task-on-landing-mechanics-and-jump-performance
#15
Boyi Dai, Ross F Cook, Elizabeth A Meyer, Yvonne Sciascia, Taylour J Hinshaw, Chaoyi Wang, Qin Zhu
Anterior cruciate ligament (ACL) injuries commonly occur during jump-landing tasks when individuals' attention is simultaneously allocated to other objects and tasks. The purpose of the current study was to investigate the effect of allocation of attention imposed by a secondary cognitive task on landing mechanics and jump performance. Thirty-eight recreational athletes performed a jump-landing task in three conditions: no counting, counting backward by 1 s from a randomly given number, and counting backward by 7 s from a randomly given number...
February 28, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/28632051/quantifying-coordination-among-the-rearfoot-midfoot-and-forefoot-segments-during-running
#16
Tomoya Takabayashi, Mutsuaki Edama, Erika Yokoyama, Chiaki Kanaya, Masayoshi Kubo
Because previous studies have suggested that there is a relationship between injury risk and inter-segment coordination, quantifying coordination between the segments is essential. Even though the midfoot and forefoot segments play important roles in dynamic tasks, previous studies have mostly focused on coordination between the shank and rearfoot segments. This study aimed to quantify coordination among rearfoot, midfoot, and forefoot segments during running. Eleven healthy young men ran on a treadmill. The coupling angle, representing inter-segment coordination, was calculated using a modified vector coding technique...
February 28, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/28632046/targeting-associated-mechanisms-of-anterior-cruciate-ligament-injury-in-female-community-level-athletes
#17
Jonathan M D Staynor, Joanna C Nicholas, Gillian Weir, Jacqueline A Alderson, Cyril J Donnelly
This study aims to determine if biomechanically informed injury prevention training can reduce associated factors of anterior cruciate ligament injury risk among a general female athletic population. Female community-level team sport athletes, split into intervention (n = 8) and comparison groups (n = 10), completed a sidestepping movement assessment prior to and following a 9-week training period, in which kinetic, kinematic and neuromuscular data were collected. The intervention group completed a biomechanically informed training protocol, consisting of plyometric, resistance and balance exercises, adjunct to normal training, for 15-20 min twice a week...
February 24, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/28631112/risk-of-revision-was-not-reduced-by-a-double-bundle-acl-reconstruction-technique-results-from-the-scandinavian-registers
#18
Cathrine Aga, Jüri-Tomas Kartus, Martin Lind, Stein Håkon Låstad Lygre, Lars-Petter Granan, Lars Engebretsen
BACKGROUND: Double-bundle anterior cruciate ligament (ACL) reconstruction has demonstrated improved biomechanical properties and moderately better objective outcomes compared with single-bundle reconstructions. This could make an impact on the rerupture rate and reduce the risk of revisions in patients undergoing double-bundle ACL reconstruction compared with patients reconstructed with a traditional single-bundle technique. The National Knee Ligament Registers in Scandinavia provide information that can be used to evaluate the revision outcome after ACL reconstructions...
June 19, 2017: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/28631083/is-there-a-relationship-between-serum-ox-ldl-oxidative-stress-and-pon1-in-knee-osteoarthritis
#19
Cemil Ertürk, Mehmet Akif Altay, Ali Bilge, Hakim Çelik
Previous in vitro studies have shown that oxidized low-density lipoprotein (ox-LDL) plays a role in the pathogenesis of osteoarthritis (OA). Paraoxonase-1 (PON1) protects both low-density lipoproteins (LDLs) and high-density lipoprotein (HDLs) against oxidative damage from circulating cells. In addition, PON1 is inactivated by ox-LDL and preserved by antioxidants. However, the relationship between serum ox-LDL, oxidative stress, and PON1 in knee OA remains unclear. Therefore, we investigated ox-LDL association with oxidative stress and PON1 in knee OA, and evaluated their relationships using radiological and clinical parameters...
June 19, 2017: Clinical Rheumatology
https://www.readbyqxmd.com/read/28630841/bipolar-hemiarthroplasty-in-a-patient-with-above-knee-amputation-surgical-technique
#20
Ramesh Perumal, Santhosh Ram Gaddam, J Vasudeva, J Dheenadhayalan, S Rajasekaran
INTRODUCTION: Femoral neck fractures are a common occurrence in lower limb amputees. Good post-operative results of hip hemiarthroplasty have been described in below-knee amputees. However, to our knowledge, very few such cases have been reported in above-knee amputees. CASE REPORT: We present a case of a 75-year-old male patient who underwent above-knee amputation of the right lower limb for severe crush injury right leg and a bipolar hemiarthroplasty for an ipsilateral fracture neck of femur sustained in the same road traffic accident...
January 2017: Journal of Orthopaedic Case Reports
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