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https://www.readbyqxmd.com/read/28641194/use-of-a-long-distally-fixed-intramedullary-stem-to-treat-a-periprosthetic-femoral-fracture-following-total-hip-arthroplasty-using-a-thrust-plate-hip-prosthesis-a-case-report
#1
Hiroyuki Hatanaka, Goro Motomura, Satoshi Ikemura, Kazuhiko Sonoda, Yusuke Kubo, Takeshi Utsunomiya, Takuaki Yamamoto, Yasuharu Nakashima
INTRODUCTION: The thrust plate hip prosthesis (TPP; Zimmer, Winterthur, Switzerland) is a hip prosthesis that is no longer in production. Few reports have focused on periprosthetic fractures following total hip arthroplasty (THA) with the use of a TPP. PRESENTATION OF CASE: We report a 57-year-old woman with a periprosthetic femoral fracture 13 years after THA with the use of a TPP. A plain radiograph showed a displaced subtrochanteric fracture of the right femur just below the distal tip of the lateral plate without implant loosening...
June 13, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28275003/inverse-dynamic-modelling-of-jumping-in-the-red-legged-running-frog-kassina-maculata
#2
Laura B Porro, Amber J Collings, Enrico A Eberhard, Kyle P Chadwick, Christopher T Richards
Although the red-legged running frog Kassina maculata is secondarily a walker/runner, it retains the capacity for multiple locomotor modes, including jumping at a wide range of angles (nearly 70°). Using simultaneous hind limb kinematics and single-foot ground reaction forces, we performed inverse dynamics analyses to calculate moment arms and torques about the hind limb joints during jumping at different angles in K. maculata. We show that forward thrust is generated primarily at the hip and ankle, while body elevation is primarily driven by the ankle...
March 8, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28196452/an-investigation-of-force-components-in-orthogonal-cutting-of-medical-grade-cobalt-chromium-alloy-astm-f1537
#3
Szymon Baron, Eamonn Ahearne
An ageing population, increased physical activity and obesity are identified as lifestyle changes that are contributing to the ongoing growth in the use of in-vivo prosthetics for total hip and knee arthroplasty. Cobalt-chromium-molybdenum (Co-Cr-Mo) alloys, due to their mechanical properties and excellent biocompatibility, qualify as a class of materials that meet the stringent functional requirements of these devices. To cost effectively assure the required dimensional and geometric tolerances, manufacturers rely on high-precision machining...
February 1, 2017: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/28151780/electromyographic-comparison-of-barbell-deadlift-hex-bar-deadlift-and-hip-thrust-exercises-a-cross-over-study
#4
Vidar Andersen, Marius Steiro Fimland, Dag-Andrè Mo, Vegard Moe Iversen, Torbjørn Vederhus, Lars Richard Rockland Hellebø, Kristina Isabel Nordaune, Atle Hole Saeterbakken
The aim of the study was to compare the muscle activation level of the gluteus maximus, biceps femoris and erector spinae in the hip thrust, barbell deadlift and hex bar deadlift; each of which are compound resisted hip-extension exercises. After two familiarization sessions, 13 resistance-trained men performed a 1-RM in all three exercises in one session, in randomized and counterbalanced order. The whole ascending movement (concentric phase), as well as its lower and upper part (whole movement divided in two), were analyzed...
January 30, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28056670/electromyographic-comparison-of-conventional-machine-strength-training-versus-bodyweight-exercises-in-patients-with-chronic-stroke
#5
Jonas Vinstrup, Joaquin Calatayud, Markus D Jakobsen, Emil Sundstrup, Kenneth Jay, Mikkel Brandt, Peter Zeeman, Jørgen R Jørgensen, Lars L Andersen
OBJECTIVE: To investigate whether bodyweight exercises can induce comparable levels of muscle activity as conventional machine exercises in chronic stroke patients. METHODS: Eighteen patients performed three repetitions of bilateral- and unilateral machine leg press and the bodyweight exercises chair rise and hip thrust. Surface electromyography (EMG) was recorded from 10 lower extremity muscles and normalized to maximal EMG (nEMG) of the non-paretic leg. RESULTS: For the paretic leg, the bodyweight exercises showed comparable levels of nEMG in 6 out of 10 muscles compared with the bilateral leg press...
January 6, 2017: Topics in Stroke Rehabilitation
https://www.readbyqxmd.com/read/27686117/kinematical-analysis-of-the-v2-ski-skating-technique-a-longitudinal-study
#6
Thomas Losnegard, Håvard Myklebust, Angela Ehrhardt, Jostein Hallén
To characterise timing of movements and evaluate performance effects of technique alterations in V2 ski skating, 13 elite male cross-country skiers (age, 23 ± 2 years; stature, 182 ± 6 cm; body mass, 76 ± 8 kg; V2 V̇O2max, 79.3 ± 4.4 mL · kg(-1) · min(-1)) were tested four times during the preparation and competition phase on a roller ski treadmill. Each test consisted of submaximal intensities of exercise for determination of oxygen cost followed by one 1000-m performance test. Hip movement (from accelerometer data) and joint angles (2D video) were determined for high-intensity exercise (6° and 3...
June 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/27253835/effects-of-a-six-week-hip-thrust-vs-front-squat-resistance-training-program-on-performance-in-adolescent-males-a-randomized-controlled-trial
#7
RANDOMIZED CONTROLLED TRIAL
Bret Contreras, Andrew D Vigotsky, Brad J Schoenfeld, Chris Beardsley, Daniel T McMaster, Jan H T Reyneke, John B Cronin
Contreras, B, Vigotsky, AD, Schoenfeld, BJ, Beardsley, C, McMaster, DT, Reyneke, JHT, and Cronin, JB. Effects of a six-week hip thrust vs. front squat resistance training program on performance in adolescent males: A randomized controlled trial. J Strength Cond Res 31(4): 999-1008, 2017-The barbell hip thrust may be an effective exercise for increasing horizontal force production and may thereby enhance performance in athletic movements requiring a horizontal force vector, such as horizontal jumping and sprint running...
April 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/26994647/the-thrust-plate-hip-prosthesis-a-follow-up-of-15-20-years-with-102-implants
#8
Maja Kaegi, Martin L Buergi, Hilaire A C Jacob, Heinz H Bereiter
BACKGROUND: Between November 1992 and January 1999, a cohort of 102 thrust plate hip prostheses was implanted. METHODS: We now clinically and radiologically evaluate the remaining 73 prostheses with a mean follow-up of 17.2 years. RESULTS: The Harris Hip Score increased from 51.4 points preoperatively to 94.3 points at the time of this follow-up. No further changes in the radiologic findings occurred since the first follow-up, published in 2005, conducted 2-8 years after implantation...
May 2016: Journal of Arthroplasty
https://www.readbyqxmd.com/read/26695353/a-comparison-of-gluteus-maximus-biceps-femoris-and-vastus-lateralis-electromyography-amplitude-for-the-barbell-band-and-american-hip-thrust-variations
#9
COMPARATIVE STUDY
Bret Contreras, Andrew D Vigotsky, Brad J Schoenfeld, Chris Beardsley, John Cronin
Bridging exercise variations are well researched and commonly employed for both rehabilitation and sport performance. However, resisted bridge exercise variations have not yet been compared in a controlled experimental study. Therefore, the purpose of this study was to compare the differences in upper and lower gluteus maximus, biceps femoris, and vastus lateralis electromyography (EMG) amplitude for the barbell, band, and American hip thrust variations. Thirteen healthy female subjects (age = 28.9 y; height = 164...
June 2016: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/26214739/a-comparison-of-gluteus-maximus-biceps-femoris-and-vastus-lateralis-electromyographic-activity-in-the-back-squat-and-barbell-hip-thrust-exercises
#10
Bret Contreras, Andrew D Vigotsky, Brad J Schoenfeld, Chris Beardsley, John Cronin
The back squat and barbell hip thrust are both popular exercises used to target the lower body musculature; however, these exercises have yet to be compared. Therefore, the purpose of this study was to compare the surface electromyographic (EMG) activity of the upper and lower gluteus maximus, biceps femoris, and vastus lateralis between the back squat and barbell hip thrust. Thirteen trained women (n = 13; age = 28.9 years; height = 164 cm; mass = 58.2 kg) performed estimated 10-repetition maximums (RM) in the back squat and barbell hip thrust...
December 2015: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/25883873/the-use-of-dry-needling-for-a-subject-with-chronic-lateral-hip-and-thigh-pain-a-case-report
#11
Ron Pavkovich
BACKGROUND AND PURPOSE: Lateral thigh pain, commonly referred to as greater trochanteric pain syndrome (GTPS) and/ or iliotibial band syndrome (ITBS) is commonly treated by the physical therapist. Lateral thigh pain is commonly treated by the physical therapist. The sources of lateral thigh pain are commonly attributed to GTPS and/ or ITBS though various pathologies may contribute to this pain, of which trigger points (TrPs) may be an etiology. Dry needling (DN) is an intervention utilized by physical therapists where a monofilament needle is inserted into soft tissue in order to reduce pain to improve range of motion/ motor control dysfunction...
April 2015: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/25511165/kinematic-and-kinetic-evidence-for-functional-lateralization-in-a-symmetrical-motor-task-the-water-polo-eggbeater-kick
#12
Nuno Oliveira, Ross H Sanders
Bilaterality and motor lateralization have been associated with neural lateralization, suggesting that the dominant and non-dominant systems might have different specializations. The study of symmetrical motor tasks can provide evidence relating to this hypothesis. The water polo eggbeater kick is a skill comprising anti-phase and directionally opposite rotations of the right and left lower limbs to provide upward thrust to elevate the body. Effectiveness of the skill depends on moving the feet in predominantly horizontal directions with an orientation that produces lift throughout as much of the cycle as possible...
March 2015: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/24948138/compensations-during-unsteady-locomotion
#13
Mu Qiao, Devin L Jindrich
Locomotion in a complex environment is often not steady, but the mechanisms used by animals to power and control unsteady locomotion (stability and maneuverability) are not well understood. We use behavioral, morphological, and impulsive perturbations to determine the compensations used during unsteady locomotion. At the level both of the whole-body and of joints, quasi-stiffness models are useful for describing adjustments to the functioning of legs and joints during maneuvers. However, alterations to the mechanics of legs and joints often are distinct for different phases of the step cycle or for specific joints...
December 2014: Integrative and Comparative Biology
https://www.readbyqxmd.com/read/24387803/effect-of-compensatory-trunk-movements-on-knee-and-hip-joint-loading-during-gait-in-children-with-different-orthopedic-pathologies
#14
Felix Stief, Harald Böhm, Carsten Ebert, Leonhard Döderlein, Andrea Meurer
Ipsilateral trunk lean toward the affected stance limb has been identified as a compensatory mechanism to unload the hip joint. However, this altered gait pattern increases the lever arm around the knee joint by shifting the ground reaction vector more lateral to the knee joint center, which could be sufficient to deform the lateral compartment of the knee. The purpose of the present study was to show the effect of ipsilateral trunk lean on hip and knee joint moments in the frontal plane in 132 young patients with different orthopedic diagnosis...
March 2014: Gait & Posture
https://www.readbyqxmd.com/read/24195217/-improved-multiple-acupuncture-and-lifting-thrusting-methods-for-59-cases-of-hip-epithelum-neuritis
#15
Xiang-Dong Xi
No abstract text is available yet for this article.
August 2013: Zhongguo Zhen Jiu, Chinese Acupuncture & Moxibustion
https://www.readbyqxmd.com/read/23957331/differences-in-v1-and-v2-ski-skating-techniques-described-by-accelerometers
#16
H Myklebust, T Losnegard, J Hallén
The aims of the study were to describe the differences between the ski skating techniques V1 and V2 and evaluate reproducibility in complex cyclic hip movements measured by accelerometers. Fourteen elite senior male cross-country skiers rollerskied twice for 1 min (V1 and V2) at 4° inclination and 3 m/s. Tests were repeated after 20 min and again 4 months later. Five triaxial accelerometers were attached to the subject's hip (os sacrum), poles, and ski boots. Post-processing included transforming to an approximately global coordinate system, normalization for cycle time, double integration for displacement, and revealing temporal patterns...
December 2014: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/23926732/the-thrust-plate-prosthesis-long-term-clinical-and-radiological-results
#17
Leon W Diederix, Peter J T S Van Winterswijk, Sander B Schouten, Pieter A G M Bakx, Jaap Huij
The Thrust Plate Prosthesis is a femoral implant designed for total hip arthroplasty, based on the principles of physiologic loading of the metaphysis of the proximal femur, and preserving the bone stock. This study presents the long-term clinical and radiological results of 34 patients with 36 Thrust Plate Prostheses. In a retrospective analysis, we investigated the reoperation-free survival as well as the clinical and radiological results. Mean age at operation was 51 +/- 6.4 years. Mean follow-up length was 11...
June 2013: Acta Orthopaedica Belgica
https://www.readbyqxmd.com/read/23487473/the-reliability-validity-and-applicability-of-two-sport-specific-power-tests-in-synchronized-swimming
#18
Mia Peric, Natasa Zenic, Gordana Furjan Mandic, Damir Sekulic, Dorica Sajber
Sport-specific tests are rarely investigated in synchronized swimming (synchro). The aim of this research was to study the reliability and the validity of two sport-specific tests that are based on synchro elements, namely, the Barracuda thrust ("Barracuda") and the Boost. The Barracuda is a move in which the swimmer begins in the back pike position (head down with the legs perpendicular to the surface of the water) and then moves the legs and hips rapidly upward, unrolling the body to obtain a maximal vertical position above the surface of the water...
May 2012: Journal of Human Kinetics
https://www.readbyqxmd.com/read/22892627/multilevel-guided-growth-for-hip-and-knee-varus-secondary-to-chondrodysplasia
#19
Peter M Stevens, Eduardo N Novais
BACKGROUND: Young children with chondrodysplasia may develop multilevel varus deformities that compromise comfort and gait. The classic treatment of performing corrective, staged osteotomies, at each level of deformity, is a daunting prospect that is fraught with potential complications. To avoid this scenario, we have adopted single-event, multilevel surgery, using guided growth to simultaneously address bilateral varus deformities of the knee and hip, with good results. METHODS: Three cousins with Schmid-type metaphyseal dysplasia, presented for treatment of progressive varus deformities...
September 2012: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/22272446/a-clinical-radiological-and-computational-analysis-of-the-thrust-plate-prosthesis-in-young-patients
#20
T G Gerich, P Wilmes, U Nackenhorst, T Gösling, M Ziefle, C Krettek
BACKGROUND AND PURPOSE: A thrust plate prosthesis can be used as an alternative to a conventional stem prosthesis, preserving the diaphyseal bone stock. Recent findings however predict a higher rate of aseptic loosening than with intramedullary devices. The purpose of our investigation was to compare the clinical outcome and radiological findings with a finite element analysis of bone remodeling. The hypothesis was that aseptic loosening after thrust plate prosthesis of the hip is inherent to the design...
2011: Bulletin de la Société des Sciences Médicales du Grand-Duché de Luxembourg
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