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Biomechanics of hip joint

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https://www.readbyqxmd.com/read/28075436/gait-kinematic-deviations-in-patients-with-developmental-dysplasia-of-the-hip-treated-with-total-hip-arthroplasty
#1
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
#2
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
#3
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
#4
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
#5
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
#6
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
#7
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
#8
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
#9
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
#10
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
#11
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
#12
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
https://www.readbyqxmd.com/read/27942700/lower-extremity-biomechanical-demands-during-saut-de-chat-leaps
#13
Danielle N Jarvis, Kornelia Kulig
: In dance, high demands are placed on the lower extremity joints during jumping tasks. The purpose of this study was to compare biomechanical demands placed on the lower extremity joints during the takeoff and landing phases of saut de chat leaps. METHODS: Thirty healthy, experienced dancers with 20.8±4.9 yrs of dance training performed 5 saut de chat leaps. A three-dimensional motion analysis system and force plates were used to collect kinematic and kinetic data...
December 2016: Medical Problems of Performing Artists
https://www.readbyqxmd.com/read/27920583/intellijoint-hip-%C3%A2-a-3d-mini-optical-navigation-tool-for-improving-intraoperative-accuracy-during-total-hip-arthroplasty
#14
Wayne G Paprosky, Jeffrey M Muir
Total hip arthroplasty is an increasingly common procedure used to address degenerative changes in the hip joint due to osteoarthritis. Although generally associated with good results, among the challenges associated with hip arthroplasty are accurate measurement of biomechanical parameters such as leg length, offset, and cup position, discrepancies of which can lead to significant long-term consequences such as pain, instability, neurological deficits, dislocation, and revision surgery, as well as patient dissatisfaction and, increasingly, litigation...
2016: Medical Devices: Evidence and Research
https://www.readbyqxmd.com/read/27909663/the-quebec-city-slider-a-technique-for-capsular-closure-and-plication-in-hip-arthroscopy
#15
Travis J Menge, Jorge Chahla, Eduardo Soares, Justin J Mitchell, Marc J Philippon
Biomechanical and clinical studies have shown that the hip joint capsule plays an important role in maintaining stability and hip mechanics, including rotation and translation. The recent literature has shown that capsule closure after hip arthroscopy helps to restore stability. Without restoration of the native anatomy, the hip joint may translate when patients engage in activities that place force across the hip, leading to either microinstability or frank dislocation. The purpose of this note is to describe our preferred technique of capsular closure or plication during hip arthroscopy...
October 2016: Arthroscopy Techniques
https://www.readbyqxmd.com/read/27904791/current-concepts-in-biomechanical-interventions-for-patellofemoral-pain
#16
Richard W Willy, Erik P Meira
: Patellofemoral pain (PFP) has historically been a complex and enigmatic issue. Many of the factors thought to relate to PFP remain after patients' symptoms have resolved making their clinical importance difficult to determine. The tissue homeostasis model proposed by Dye in 2005 can assist with understanding and implementing biomechanical interventions for PFP. Under this model, the goal of interventions for PFP should be to re-establish patellofemoral joint (PFJ) homeostasis through a temporary alteration of load to the offended tissue, followed by incrementally restoring the envelope of function to the baseline level or higher...
December 2016: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/27897410/androgen-deprivation-causes-selective-deficits-in-the-biomechanical-leg-muscle-function-of-men-during-walking-a-prospective-case-control-study
#17
Ada S Cheung, Hans Gray, Anthony G Schache, Rudolf Hoermann, Daryl Lim Joon, Jeffrey D Zajac, Marcus G Pandy, Mathis Grossmann
BACKGROUND: Although muscle mass declines with testosterone deficiency in men, previous studies of muscle function have not demonstrated consistent deficits, likely due to relatively insensitive methodology. Our objective was to determine the effects of testosterone deprivation on the biomechanical function of individual lower-limb muscles. METHODS: We conducted a 12-month prospective, observational case-control study of 34 men newly commencing androgen deprivation treatment (ADT) for prostate cancer and 29 age-matched prostate cancer controls...
August 2, 2016: Journal of Cachexia, Sarcopenia and Muscle
https://www.readbyqxmd.com/read/27882360/static-and-dynamic-predictors-of-foot-progression-angle-in-individuals-with-and-without-diabetes-mellitus-and-peripheral-neuropathy
#18
Ericka N Merriwether, Mary K Hastings, Michael J Mueller, Kathryn L Bohnert, Michael J Strube, Darrah R Snozek, David R Sinacore
INTRODUCTION: Foot progression angle (FPA) is a predictor of elevated regional plantar stresses and loads, which are indicators of dermal injury risk in individuals with diabetes mellitus and peripheral neuropathy (DMPN). FPA accounts for 15-45% of the variance in plantar stresses and loads in adults with DMPN. However, the biomechanical factors underlying an "out-toeing" gait pattern in this clinical population have not been examined. The primary purpose of this study was to identify static and dynamic predictors of foot progression angle magnitude in adults with and without DMPN...
2016: Annals of Gerontology and Geriatric Research
https://www.readbyqxmd.com/read/27865814/obesity-and-the-role-of-bariatric-surgery-in-the-surgical-management-of-osteoarthritis-of-the-hip-and-knee-a-review-of-the-literature
#19
REVIEW
Bryan D Springer, Jonathan T Carter, Alexander S McLawhorn, Keith Scharf, Mitchell Roslin, Kara J Kallies, John M Morton, Shanu N Kothari
Obesity accelerates the development of osteoarthritis of the knee and hip by exerting deleterious effects on joints through both biomechanical and also systemic inflammatory changes. The objective of this review was to evaluate the impact of obesity on lower limb biomechanics and total joint arthroplasty outcomes, as well as weight changes after joint arthroplasty and the role of bariatric surgery among patients requiring joint arthroplasty. The currently published data indicate that weight loss increases swing time, stride length, gait speed, and lower extremity range of motion...
September 14, 2016: Surgery for Obesity and related Diseases: Official Journal of the American Society for Bariatric Surgery
https://www.readbyqxmd.com/read/27834558/comprehensive-gait-analysis-of-healthy-older-adults-who-have-undergone-long-distance-walking
#20
Mustafa M O Elhadi, Christina Z Ma, Duo W C Wong, Anson H P Wan, Winson C C Lee
Many older adults do not adhere to the recommended physical activity levels. This study examines the gait changes upon long-distance walking among healthy older adults. Gait tests of 24 adults aged 65 or more were conducted at the baseline, at the end of 30 and 60 minutes of treadmill walk. Spatial temporal, kinematic and kinetic gait data were computed. Perceived level of exertion was evaluated for each subject. Ten subjects (Group B) perceived higher exertion level than the remaining fourteen subjects (Group A)...
November 11, 2016: Journal of Aging and Physical Activity
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