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https://www.readbyqxmd.com/read/28110363/bone-morphotypes-of-the-varus-and-valgus-knee
#1
E Thienpont, P E Schwab, O Cornu, J Bellemans, J Victor
BACKGROUND: Coronal deformity correction with total knee arthroplasty (TKA) is an important feature in the treatment of osteoarthritis (OA). The hypothesis of this study was that bone morphology would be different in varus and valgus deformity, both before osteoarthritis development as well as during and after the disease process of OA. MATERIALS AND METHODS: Retrospective study with measurements on preoperative and postoperative full leg standing radiographs of 96 patients who underwent TKA...
January 21, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28108017/influence-of-kinematics-on-the-wear-of-a-total-ankle-replacement
#2
Alexandra Smyth, John Fisher, Silvia Suñer, Claire Brockett
Total ankle replacement (TAR) is an alternative to fusion, replacing the degenerated joint with a mechanical motion-preserving alternative. Minimal pre-clinical testing has been reported to date and existing wear testing standards lack definition. Ankle gait is complex, therefore the aim of this study was to investigate the effect on wear of a range of different ankle gait kinematic inputs. Five Zenith (Corin Group) TARs were tested in a modified knee simulator for twelve million cycles (Mc). Different combinations of IR rotation and AP displacement were applied every 2Mc to understand the effects of the individual kinematics...
January 8, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28105948/active-lower-limb-prosthetics-a-systematic-review-of-design-issues-and-solutions
#3
REVIEW
Michael Windrich, Martin Grimmer, Oliver Christ, Stephan Rinderknecht, Philipp Beckerle
This paper presents a review on design issues and solutions found in active lower limb prostheses. This review is based on a systematic literature search with a methodical search strategy. The search was carried out across four major technical databases and the retrieved records were screened for their relevance. A total of 21 different active prostheses, including 8 above-knee, 9 below-knee and 4 combined knee-ankle prostheses were identified. While an active prosthesis may help to restore the functional performance of an amputee, the requirements regarding the actuation unit as well as for the control system are high and the development becomes a challenging task...
December 19, 2016: Biomedical Engineering Online
https://www.readbyqxmd.com/read/28105865/lower-extremity-variability-changes-with-drop-landing-height-manipulations
#4
Andrew D Nordin, Janet S Dufek
Landing is a common lower extremity injury mechanism in sport, with potential connections to movement control accessed through variability measures. We investigated intra-subject lower extremity variability changes following drop-landing height manipulations using standard deviation (SD) and coefficient of variation (CV) among lower extremity peak sagittal joint angles and moments. Fourteen healthy participants completed five drop-landing trials from five heights 20%, 60%, 100%, 140% and 180% maximum vertical jump height (MVJH)...
January 20, 2017: Research in Sports Medicine
https://www.readbyqxmd.com/read/28100124/compelling-overuse-injury-incidence-in-youth-multisport-athletes
#5
Abdallah Rejeb, Amanda Johnson, Roel Vaeyens, Cosmin Horobeanu, Abdulaziz Farooq, Erik Witvrouw
The present investigation was carried out to examine the incidence and pattern of injuries in adolescent multisport athletes from youth sports academy. Injury data were prospectively collected from 166 athletes during the seasons from 2009 to 2014. A total of 643 injuries were identified, 559 (87.0%) were time-loss injuries. The overall injury incidence was 5.5 (95% confidence interval CI: 5.1-6.0), the incidence of time-loss injuries was 4.8 (95% CI: 4.4-5.2), the incidence of growth conditions was 1.2 (95% CI: 1...
January 18, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28099484/increased-anterior-pelvic-angle-characterizes-the-gait-of-children-with-attention-deficit-hyperactivity-disorder-adhd
#6
Hiroaki Naruse, Takashi X Fujisawa, Chiho Yatsuga, Masafumi Kubota, Hideaki Matsuo, Shinichiro Takiguchi, Seiichiro Shimada, Yuto Imai, Michio Hiratani, Hirotaka Kosaka, Akemi Tomoda
BACKGROUND: Children with attention deficit/hyperactivity disorder (ADHD) frequently have motor problems. Previous studies have reported that the characteristic gait in children with ADHD is immature and that subjects demonstrate higher levels of variability in gait characteristics for the lower extremities than healthy controls. However, little is known about body movement during gait in children with ADHD. The purpose of this study was to identify the characteristic body movements associated with ADHD symptoms in children with ADHD...
2017: PloS One
https://www.readbyqxmd.com/read/28093371/sonographically-guided-knee-meniscus-injections-feasibility-techniques-and-validation
#7
Michael R Baria, Jacob L Sellon, Dan Lueders, Jay Smith
BACKGROUND: There is a growing interest in the use of biologic agents such as platelet-rich plasma and mesenchymal stem/stromal cells to treat musculoskeletal injuries, including meniscal tears. Although prior research has documented the role of diagnostic ultrasound to evaluate meniscal tears, sonographically guided (SG) techniques to specifically deliver therapeutic agents into the meniscus have not been described. OBJECTIVE: To describe and validate SG injection techniques for the body and posterior horn of the medial and lateral meniscus...
January 13, 2017: PM & R: the Journal of Injury, Function, and Rehabilitation
https://www.readbyqxmd.com/read/28092566/wake-up-exoskeleton-to-assist-children-with-cerebral-palsy-design-and-preliminary-evaluation-in-level-walking
#8
Fabrizio Patane, Stefano Rossi, Fausto Del Sette, Juri Taborri, Paolo Cappa
This paper presents the modular design and control of a novel compliant lower limb multi-joint exoskeleton for the rehabilitation of ankle knee mobility and locomotion of pediatric patients with neurological diseases, such as Cerebral Palsy (CP). The device consists of an untethered powered knee-ankle-foot orthosis (KAFO), addressed as WAKE-up (Wearable Ankle Knee Exoskeleton), characterized by a position control and capable of operating synchronously and synergistically with the human musculoskeletal system...
January 11, 2017: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/28090182/supervised-versus-home-exercise-training-programs-on-functional-balance-in-older-subjects
#9
Enas Fawzy Youssef, Alsayed Abd Elhameed Shanb
BACKGROUND: Aging is associated with a progressive decline in physical capabilities and a disturbance of both postural control and daily living activities. The aim of this study was to evaluate the effects of supervised versus home exercise programs on muscle strength, balance and functional activities in older participants. METHODS: Forty older participants were equally assigned to a supervised exercise program (group-I) or a home exercise program (group-II). Each participant performed the exercise program for 35-45 minutes, two times per week for four months...
November 2016: Malaysian Journal of Medical Sciences: MJMS
https://www.readbyqxmd.com/read/28089359/transient-and-long-time-kinetic-responses-of-the-cadaveric-leg-during-internal-and-external-foot-rotation
#10
Alexander R Mait, Adwait Mane, Jason L Forman, John Paul Donlon, Bingbing Nie, Richard W Kent
The purpose of this study was to determine the long-time and transient characteristics of the moment generated by external (ER) and internal (IR) rotation of the calcaneus with respect to the tibia. Two human cadaver legs were disarticulated at the knee joint while maintaining the connective tissue between the tibia and fibula. An axial rotation of 21° was applied to the proximal tibia to generate either ER or IR while the fibula was unconstrained and the calcaneus was permitted to translate in the transverse plane...
January 7, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28086918/atypical-monoarthritis-presentation-in-children-with-oligoarticular-juvenile-idiopathic-arthritis-a-case-series
#11
Natasha Lepore, Megan Cashin, Debra Bartley, Daniela Simona Ardelean
BACKGROUND: Oligoarticular juvenile idiopathic arthritis (oligoJIA), the most common chronic inflammatory arthritis of childhood, usually involves the knees and ankles. Severe oligoJIA monoarthritis presenting in a joint other than knees and ankles, is rare. FINDINGS: We report four children who presented with severe isolated arthritis of the hip, wrist or elbow and were diagnosed with oligoJIA. All four were girls with a median age of 11.5 years. Those with hip arthritis also met the classification criteria for juvenile-onset spondylarthopathy...
January 13, 2017: Pediatric Rheumatology Online Journal
https://www.readbyqxmd.com/read/28070457/the-concurrent-validity-and-reliability-of-the-leg-motion-system-for-measuring-ankle-dorsiflexion-range-of-motion-in-older-adults
#12
Carlos Romero Morales, César Calvo Lobo, David Rodríguez Sanz, Irene Sanz Corbalán, Beatriz Ruiz Ruiz, Daniel López López
BACKGROUND: New reliable devices for range of motion (ROM) measures in older adults are necessary to improve knowledge about the functional capability in this population. Dorsiflexion ROM limitation is associated with ankle injuries, foot pain, lower limb disorders, loss of balance, gait control disorders and fall risk in older adults. The aim of the present study was to assess the validity and reliability of the Leg Motion device for measuring ankle dorsiflexion ROM in older adults. METHODS: Adescriptive repeated-measures study was designed to test the reliability of Leg Motion in thirty-three healthy elderly patients older than 65 years...
2017: PeerJ
https://www.readbyqxmd.com/read/28065472/adaptive-changes-in-running-kinematics-as-a-function-of-head-stability-demands-and-their-effect-on-shock-transmission
#13
Jongil Lim, Michael A Busa, Richard E A van Emmerik, Joseph Hamill
This study aimed to identify adaptive changes in running kinematics and impact shock transmission as a function of head stability requirements. Fifteen strides from twelve recreational runners were collected during preferred speed treadmill running. Head stability demands were manipulated through real-time visual feedback that required head-gaze orientation to maintain within boxes of different sizes, ranging from 21° to 3° of visual angle with 3° decrements. The main outcome measures were tibial and head peak accelerations in the time and frequency domains (impact and active phases), shock transmission from tibia to head, stride parameters, and sagittal plane joint kinematics...
December 29, 2016: Journal of Biomechanics
https://www.readbyqxmd.com/read/28061849/do-size-shape-and-alignment-parameters-of-the-femoral-condyle-affect-the-trochlear-groove-tracking-a-morphometric-study-based-on-3d-computed-tomography-models-in-chinese-people
#14
Zhe Du, Shichang Chen, Mengning Yan, Bing Yue, Yiming Zeng, You Wang
BACKGROUND: Our study aimed to investigate whether geometrical features (size, shape, or alignment parameters) of the femoral condyle affect the morphology of the trochlear groove. METHODS: Computed tomography models of 195 femurs (97 and 98 knees from male and female subjects, respectively) were reconstructed into three-dimensional models and categorised into four types of trochlear groove morphology based on the position of the turning point in relation to the mechanical axis (types 45°, 60°, 75°, and 90°)...
January 6, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28059962/intraoperative-micro-breaks-with-targeted-stretching-enhance-surgeon-physical-function-and-mental-focus-a-multicenter-cohort-study
#15
Adrian E Park, Hamid R Zahiri, M Susan Hallbeck, Vedra Augenstein, Erica Sutton, Denny Yu, Bethany R Lowndes, Juliane Bingener
OBJECTIVE: The aim of this study was to investigate the effect of intraoperative targeted stretching micro breaks (TSMBs) on the experienced pain and fatigue, physical functions, and mental focus of surgeons. BACKGROUND: Surgeons are routinely subject to mental and physical stresses through the course of their work in the operating room. One of the factors most contributory to the shortening of a surgeon's career is work-related pain and its effects on patient safety and personal relationships...
February 2017: Annals of Surgery
https://www.readbyqxmd.com/read/28057348/lower-extremity-control-during-turns-initiated-with-and-without-hip-external-rotation
#16
Antonia M Zaferiou, Henryk Flashner, Rand R Wilcox, Jill L McNitt-Gray
The pirouette turn is often initiated in neutral and externally rotated hip positions by dancers. This provides an opportunity to investigate how dancers satisfy the same mechanical objectives at the whole-body level when using different leg kinematics. The purpose of this study was to compare lower extremity control strategies during the turn initiation phase of pirouettes performed with and without hip external rotation. Skilled dancers (n=5) performed pirouette turns with and without hip external rotation...
December 29, 2016: Journal of Biomechanics
https://www.readbyqxmd.com/read/28053258/ankle-joint-pressure-changes-in-high-tibial-and-distal-femoral-osteotomies-a-cadaver-study
#17
F Krause, A Barandun, G Klammer, I Zderic, B Gueorguiev, T Schmid
AIMS: To assess the effect of high tibial and distal femoral osteotomies (HTO and DFO) on the pressure characteristics of the ankle joint. MATERIALS AND METHODS: Varus and valgus malalignment of the knee was simulated in human cadaver full-length legs. Testing included four measurements: baseline malalignment, 5° and 10° re-aligning osteotomy, and control baseline malalignment. For HTO, testing was rerun with the subtalar joint fixed. In order to represent half body weight, a 300 N force was applied onto the femoral head...
January 2017: Bone & Joint Journal
https://www.readbyqxmd.com/read/28053250/the-painful-total-ankle-arthroplasty-a-diagnostic-and-treatment-algorithm
#18
REVIEW
E Vulcano, M S Myerson
The last decade has seen a considerable increase in the use of in total ankle arthroplasty (TAA) to treat patients with end-stage arthritis of the knee. However, the longevity of the implants is still far from that of total knee and hip arthroplasties. The aim of this review is to outline a diagnostic and treatment algorithm for the painful TAA to be used when considering revision surgery. Cite this article: Bone Joint J 2017;99-B:5-11.
January 2017: Bone & Joint Journal
https://www.readbyqxmd.com/read/28050490/renal-cell-carcinoma-with-unusual-skeletal-metastasis-to-tibia-and-ankle-a-case-report-and-review-of-literature
#19
Kiran Shankar, Durgesh Kumar, Kariyanakatte Veeraiah Veerendra Kumar, Chennagiri Premlata
Renal Cell Carcinoma (RCC) accounts for 5% of the epithelial malignancies worldwide with clear cell carcinoma accounting for 85% of these malignancies. One third of these patients experience synchronous metastatic disease and 20-30% of the remaining patients experience metachronous metastatic RCC. Bony metastasis accounts for 20% of metastatic RCC. They most commonly affect the axial skeleton and rarely the long bones or the small bones of the hands and feet. Bone metastases from RCC are predominantly osteolytic in nature, leading to significant patient morbidity due to the associated Skeletal Related Events (SRE)...
November 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28049266/does-vitamin-d-affect-muscle-strength-and-architecture-an-isokinetic-and-ultrasonographic-study
#20
Murat Kara, Timur Ekiz, Özgür Kara, Tülay Tiftik, Fevziye Ünsal Malas, Sibel Özbudak Demir, Neşe Özgirgin
BACKGROUND AND OBJECTIVES: The objective of this study was to explore the association between 25- hydroxyvitamin D (25(OH)D) and muscle strength/architecture. METHODS AND STUDY DESIGN: Thirty patients (27 women, 3 men) were allocated into Group I (n=15, mean age; 44.4±9.4 years) and Group II (n=15, mean age; 39.0±9.9 years) according to the median of 25(OH)D (<13.7 ng/mL vs >13.7 ng/mL, respectively). Peak torque/body weight of the knee flexor/extensor muscles at 60°/sec and 180°/sec and those of ankle flexor/ extensor muscles at 30°/sec and 90°/sec were evaluated by using a Biodex System 3 Pro Multijoint System isokinetic dynamometer...
January 2017: Asia Pacific Journal of Clinical Nutrition
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