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Biomechanics of hip joint

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https://www.readbyqxmd.com/read/28195975/the-high-bar-and-low-bar-back-squats-a-biomechanical-analysis
#1
Daniel J Glassbrook, Scott R Brown, Eric R Helms, J Scott Duncan, Adam G Storey
No prior study has compared the joint angle and ground reaction force (Fv) differences between the high-bar back-squat (HBBS) and low-bar back-squat (LBBS) above 90% 1RM. Six male powerlifters (height: 179.2 ± 7.8 cm; bodyweight: 87.1 ± 8.0 kg; age: 27.3 ± 4.2 years) of international level, six male Olympic weightlifters (height: 176.7 ± 7.7 cm; bodyweight: 83.1 ± 13 kg; age: 25.3 ± 3.1 years) of national level, and six recreationally trained male athletes (height: 181.9 ± 8.7 cm; bodyweight: 87.9 ± 15...
February 8, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28164052/treatment-of-stiff-elbow-in-young-patients-with-interpositional-arthroplasty-for-mobility-case-series
#2
R Sivakumar, V SomaSheker, Prahalad Kumar Shingi, T Vinoth, M Chidambaram
INTRODUCTION: The elbow is a complex joint involving many articulations and complex biomechanics come into play. Elbow motion is crucial to upper limb movement that loss of 50% of elbow function equals to loss of 80% of upper extremity global function. Restoring movement and stability is challenging to the surgeon while treating a stiff elbow. Unlike other arthroplasties of hip and knee, total elbow arthroplasty (TEA) may not be a primary treatment. Interpositional arthroplasty (IPA) can be considered a viable option in posttraumatic arthritis of elbow in young patients...
September 2016: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/28160929/editorial-commentary-anatomical-vandalism-of-the-hip-hip-capsular-repair-seems-a-sound-adjunct-to-hip-arthroscopic-surgery
#3
EDITORIAL
Richard J van Arkel, Jonathan R T Jeffers, Andrew A Amis
The study "Contribution of the Pubofemoral Ligament to Hip Stability: A Biomechanical Study" by Martin, Khoury, Schröder, Johnson, Gómez-Hoyos, Campos, and Palmer found that cutting the hip capsular ligament allowed a large increase in femoral internal rotation, particularly in the flexed hip, causing subluxation to occur. In addition to providing new data on the role of the pubofemoral ligament, it raises the question of whether hip joint surgeons should repair the capsule-what are the likely consequences?-and whether any beneficial effects persist in long-term clinical follow-ups...
February 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/28157077/altered-hip-mechanics-and-patellofemoral-pain-a-review-of-literature
#4
Gholamhassan Mirzaie, Mehrnaz Kajbafvala, Abbas Rahimi, Farideh Dehghan Manshadi, Khosro Khademi Kalantari
Patellofemoral pain (PFP) is a common knee disorder in orthopedic clinics. In the last decade, several investigations have considered the role of proximal factors in addition to local and distal factors in development of PFP. There is a hypothesis which suggests that impaired neuromuscular control and altered hip joint kinematic affect tibiofemoral and patellofemoral biomechanics. Hence, PFP may develop as a result. This article reviews studies assessing the relationship between altered hip mechanics and PFP...
May 5, 2016: Ortopedia, Traumatologia, Rehabilitacja
https://www.readbyqxmd.com/read/28155591/impact-of-an-implanted-neuroprosthesis-on-community-ambulation-in-incomplete-sci
#5
Lisa M Lombardo, Rudolf Kobetic, Gilles Pinault, Kevin M Foglyano, Stephanie N Bailey, Stephen Selkirk, Ronald J Triolo
OBJECTIVE: Test the effect of a multi-joint control with implanted electrical stimulation on walking after spinal cord injury (SCI). DESIGN: Single subject research design with repeated measures Setting: Hospital-based biomechanics laboratory and user assessment of community use. PARTICIPANTS: Female with C6 AIS C SCI 30 years post injury. INTERVENTIONS: Lower extremity muscle activation with an implanted pulse generator and gait training...
February 3, 2017: Journal of Spinal Cord Medicine
https://www.readbyqxmd.com/read/28149408/maximal-power-of-the-lower-limbs-of-youth-gymnasts-and-biomechanical-indicators-of-the-forward-handspring-vault-versus-the-sports-result
#6
Andrzej Kochanowicz, Kazimierz Kochanowicz, Bartłomiej Niespodziúski, Jan Mieszkowski, Piotr Aschenbrenner, Grzegorz Bielec, Mirosława Szark-Eckardt
The aim of the study was to define the relationship between maximal power of lower limbs, the biomechanics of the forward handspring vault and the score received during a gymnastics competition. The research involved 42 gymnasts aged 9-11 years competing in the Poland's Junior Championships. The study consisted of three stages: first -estimating the level of indicators of maximal power of lower limbs tested on a force plate during the countermovement jump; second - estimating the level of biomechanical indicators of the front handspring vault...
December 1, 2016: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28135662/trunk-and-lower-limb-biomechanics-during-stair-climbing-in-people-with-and-without-symptomatic-femoroacetabular-impingement
#7
Connor A Hammond, Gillian L Hatfield, Michael K Gilbart, S Jayne Garland, Michael A Hunt
BACKGROUND: Femoroacetabular impingement is a pathomechanical hip condition leading to pain and impaired physical function. It has been shown that those with femoroacetabular impingement exhibit altered gait characteristics during level walking and stair climbing, and decreased muscle force production during isometric muscle contractions. However, no studies to-date have looked at trunk kinematics or muscle activation during dynamic movements such as stair climbing in this patient population...
January 21, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28129277/differences-in-muscle-activation-and-kinematics-between-cable-based-and-selectorized-weight-training
#8
Joseph F Signorile, Nicole K Rendos, Hector H Heredia Vargas, Taislaine C Alipio, Rebecca C Regis, Moataz M Eltoukhy, Renu S Nargund, Matthew A Romero
Signorile, JF, Rendos, NK, Heredia Vargas, HH, Alipio, TC, Regis, RC, Eltoukhy, MM, Nargund, RS, and Romero, MA. Differences in muscle activation and kinematics between cable-based and selectorized weight training. J Strength Cond Res 31(2): 313-322, 2017-Cable resistance training machines are showing resurgent popularity and allow greater number of degrees of freedom than typical selectorized equipment. Given that specific kinetic chains are used during distinct activities of daily living (ADL), cable machines may provide more effective interventions for some ADL, whereas others may be best addressed using selectorized equipment...
February 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28075436/gait-kinematic-deviations-in-patients-with-developmental-dysplasia-of-the-hip-treated-with-total-hip-arthroplasty
#9
Yong Nie, Ning Ning, Fuxing Pei, Bin Shen, Zongke Zhou, Zongming Li
Comprehensive gait analysis of patients with Crowe type II and III developmental dysplasia of the hip (DDH) after successful total hip arthroplasty (THA) is lacking in the literature. This study evaluated gait function in joint kinematics after unilateral and bilateral THA in patients with DDH. In addition, the effect of high cup position on gait function was investigated. A total of 16 unilateral and 15 bilateral cementless THA patients due to DDH and 10 healthy participants comprised the study population...
January 11, 2017: Orthopedics
https://www.readbyqxmd.com/read/28066731/imaging-of-the-hip-a-systematic-approach-to-the-young-adult-hip
#10
Sara Muñoz Chiamil, Claudia Astudillo Abarca
BACKGROUND: Great advances in knowledge and understanding of the biomechanics of the hip, both in arthroscopic procedures and imaging techniques, have expanded and improved the diagnosis of pathologies of the young adult hip. The anatomy of the hip joint is complex due to its morphology and orientation. The inter-pretation of the images requires deep knowledge of the osseous and soft tissue anatomy: muscles, tendons, ligaments, vessels and nerves. There are multiple imaging tools. Diagnostic techniques have different utilities and often are complementary...
July 2016: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/28053268/implant-options-for-the-treatment-of-intertrochanteric-fractures-of-the-hip-rationale-evidence-and-recommendations
#11
REVIEW
A R Socci, N E Casemyr, M P Leslie, M R Baumgaertner
AIMS: The aim of this paper is to review the evidence relating to the anatomy of the proximal femur, the geometry of the fracture and the characteristics of implants and methods of fixation of intertrochanteric fractures of the hip. MATERIALS AND METHODS: Relevant papers were identified from appropriate clinical databases and a narrative review was undertaken. RESULTS: Stable, unstable, and subtrochanteric intertrochanteric fractures vary widely in their anatomical and biomechanical characteristics, as do the implants used for their fixation...
January 2017: Bone & Joint Journal
https://www.readbyqxmd.com/read/28052440/positive-outcomes-following-gait-therapy-intervention-for-hip-osteoarthritis-a-longitudinal-study
#12
Deborah Solomonow-Avnon, Amir Herman, Daniel Levin, Nimrod Rozen, Eli Peled, Alon Wolf
: Footwear-generated biomechanical manipulation of lower-limb joints was shown to beneficially impact gait and quality of life in knee osteoarthritis patients, but has not been tested in hip osteoarthritis patients. We examined a customized gait treatment program using a biomechanical device shown in previous investigations to be capable of manipulating hip biomechanics via foot center of pressure (COP) modulation. The objective of this study was to assess the treatment program for hip osteoarthritis patients, enrolled in a 1-year prospective investigation, by means of objective gait and spatiotemporal parameters, and subjective quality of life measures...
January 4, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28042119/periprosthetic-femoral-fractures-and-trying-to-avoid-them-what-is-the-contribution-of-femoral-component-design-to-the-increased-risk-of-periprosthetic-femoral-fracture
#13
REVIEW
A V Carli, J J Negus, F S Haddad
AIMS: Periprosthetic femoral fractures (PFF) following total hip arthroplasty (THA) are devastating complications that are associated with functional limitations and increased overall mortality. Although cementless implants have been associated with an increased risk of PFF, the precise contribution of implant geometry and design on the risk of both intra-operative and post-operative PFF remains poorly investigated. A systematic review was performed to aggregate all of the PFF literature with specific attention to the femoral implant used...
January 2017: Bone & Joint Journal
https://www.readbyqxmd.com/read/28012635/the-effect-of-capsulotomy-and-capsular-repair-on-hip-distraction-a-cadaveric-investigation
#14
M Michael Khair, Jeffrey S Grzybowski, Benjamin D Kuhns, Thomas H Wuerz, Elizabeth Shewman, Shane J Nho
PURPOSE: To quantify how increasing interportal capsulotomy size affects the force required to distract the hip and to biomechanically compare simple side-to-side suture repair to acetabular-based suture anchors as capsular repair techniques. METHODS: Twelve fresh-frozen cadaveric hip specimens were dissected to the capsuloligamentous complex of the hip joint and fixed in a material testing system, such that a pure axial distraction of the iliofemoral ligament could be achieved...
December 22, 2016: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/28006109/joint-loading-in-the-sagittal-plane-during-gait-is-associated-with-hip-joint-abnormalities-in-patients-with-femoroacetabular-impingement
#15
Michael A Samaan, Benedikt J Schwaiger, Matthew C Gallo, Kiyoshi Sada, Thomas M Link, Alan L Zhang, Sharmila Majumdar, Richard B Souza
BACKGROUND: Femoroacetabular impingement (FAI) is a morphological abnormality of the hip joint that results in functional impairments during various activities of daily living (ADL) such as walking. Purpose/Hypothesis: The purpose of this study was to determine if lower extremity joint loading differed between patients with FAI and controls and to determine whether these altered biomechanical parameters were associated with intra-articular abnormalities. It was hypothesized that patients with FAI would exhibit altered lower extremity joint loading during walking when compared with healthy controls and that these altered joint loading patterns would be associated with intra-articular abnormalities...
December 1, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28002921/restoring-the-femoral-offset-prevent-early-migration-of-the-stem-in-total-hip-arthroplasty-an-ebra-fca-study
#16
G Vicenti, G Solarino, A Spinarelli, M Carrozzo, G Picca, R Maddalena, F Rifino, B Moretti
The use of modular stems is still debated and controversial. Some authors have highlighted a number of disadvantages of modular prostheses including high costs, the tendency to fracture, the fretting and corrosion and the increased production of debris. Other authors have emphasized several advantages to adapt the prosthesis to the morphometric differences of patients, to allow better accuracy in restoring the anatomy and biomechanics of hip joint. The advantages of the modular devices appear to be more evident in patients with developmental dysplasia of the hip (DDH)...
October 2016: Journal of Biological Regulators and Homeostatic Agents
https://www.readbyqxmd.com/read/27998170/accuracy-of-femur-reconstruction-from-sparse-geometric-data-using-a-statistical-shape-model
#17
Ju Zhang, Thor F Besier
Sparse geometric information from limited field-of-view medical images is often used to reconstruct the femur in biomechanical models of the hip and knee. However, the full femur geometry is needed to establish boundary conditions such as muscle attachment sites and joint axes which define the orientation of joint loads. Statistical shape models have been used to estimate the geometry of the full femur from varying amounts of sparse geometric information. However, the effect that different amounts of sparse data have on reconstruction accuracy has not been systematically assessed...
December 21, 2016: Computer Methods in Biomechanics and Biomedical Engineering
https://www.readbyqxmd.com/read/27990241/android-platform-for-realtime-gait-tracking-using-inertial-measurement-units
#18
Pablo Aqueveque, Sergio Sobarzo, Francisco Saavedra, Claudio Maldonado, Britam Gómez
One of the most important movements performed by the humans is gait. Biomechanical Gait analysis is usually by optical capture systems. However, such systems are expensive and sensitive to light and obstacles. In order to reduce those costs a system based on Inertial Measurements Units (IMU) is proposed. IMU are a good option to make movement analisys indoor with a low post-processing data, allowing to connect those systems to an Android platform. The design is based on two elements: a) The IMU sensors and the b) Android device...
June 13, 2016: European Journal of Translational Myology
https://www.readbyqxmd.com/read/27982715/the-effect-of-footwear-adapted-with-a-multi-curved-rocker-sole-in-conjunction-with-knee-ankle-foot-orthoses-on-walking-in-poliomyelitis-subjects-a-pilot-study
#19
Ali Mojaver, Mokhtar Arazpour, Gholamreza Aminian, Monireh Ahmadi Bani, Mahmood Bahramizadeh, Guive Sharifi, Arash Sherafatvaziri
BACKGROUND: Knee-ankle-foot orthoses (KAFOs) are used by people with poliomyelitis to ambulate. Whist advances in orthotic knee joint designs for use in KAFOs such the provision of stance control capability have proven efficacy, little attention has been paid to shoe adaptations which may also improve gait. AIM: The aim of this study was to evaluate the alteration to the kinematics and temporal-spatial parameters of gait caused by the use of heel-to-toe rocker-soled footwear when ambulating with KAFOs...
December 16, 2016: Disability and Rehabilitation. Assistive Technology
https://www.readbyqxmd.com/read/27956021/prediction-of-the-drilling-path-to-surgically-pin-the-femoral-neck-from-the-spatial-location-of-pelvic-and-femoral-anatomical-landmarks-a-cadaver-validation-study
#20
V Sholukha, J Panda, P Salvia, B Beyer, M Rooze, S Van Sint Jan
Several clinical applications rely on accurate guiding information when drilling along the femoral neck (e.g., pin insertion in case of neck fracture). Currently, applications rely on real-time X-ray imaging, which results in irradiation issues for the surgeon conducting the operation. The goal of this paper was to develop an X-ray-free method that would allow for a pathway to be drilled between the lateral aspect of the femoral diaphysis (the so-called piercing point), the femoral neck and the head centres...
December 9, 2016: Medical Engineering & Physics
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