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hip biomechanics

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https://www.readbyqxmd.com/read/29439949/lower-limb-biomechanics-in-femoroacetabular-impingement-syndrome-a-systematic-review-and-meta-analysis
#1
REVIEW
Matthew G King, Peter R Lawrenson, Adam I Semciw, Kane J Middleton, Kay M Crossley
OBJECTIVE: (1) Identify differences in hip and pelvic biomechanics in patients with femoroacetabular impingement syndrome (FAIS) compared with controls during everyday activities (eg, walking, squatting); and (2) evaluate the effects of interventions on hip and pelvic biomechanics during everyday activities. DESIGN: Systematic review. DATA SOURCES: Medline, CINAHL, EMBASE, Scopus and SPORTDiscus until February 2017. METHODS: Primary aim: studies that investigated hip or pelvic kinematics and/or joint torques of everyday activities in patients with FAIS compared with the asymptomatic contralateral limb or a control group...
February 13, 2018: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/29424452/evidence-and-mechanism-by-which-upper-partial-fibulectomy-improves-knee-biomechanics-and-decreases-knee-pain-of-osteoarthritis
#2
Yong Nie, ZeYu Huang, Bin Xu, Bin Shen, Virginia Byers Kraus, FuXing Pei
To investigate the change in short-term clinical outcomes and biomechanical properties of the knee in response to upper partial fibulectomy and to probe into the biomechanical mechanism underlying the clinical benefits of upper partial fibulectomy for medial compartment knee osteoarthritis (KOA). 29 patients with medial compartment KOA underwent upper partial fibulectomy. Visual analog scale (VAS) pain, the hospital for special surgery knee score (HSS), hip-knee-ankle (HKA) angle (measured in the frontal plane), and flexion/extension range of motion of the knee were assessed before and up to 6 months after surgery...
February 9, 2018: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29423946/is-stiffness-related-to-athletic-groin-pain
#3
S Gore, A Franklyn-Miller, C Richter, E C Falvey, E King, K Moran
Athletic groin pain (AGP) is a common injury prevalent in field sports. One biomechanical measure that may be of importance for injury risk is stiffness. To date however, stiffness has not been examined in AGP. The primary aim was to determine if AGP affects vertical and joint stiffness and if so, whether successful rehabilitation is associated with a change in stiffness. Sixty-five male patients with AGP and fifty male controls were recruited to this study. Assessment included a biomechanical examination of stiffness during a lateral hurdle hop test...
February 9, 2018: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29423246/the-role-of-the-ligamentum-teres-in-the-adult-hip-redundant-or-relevant-a-review
#4
REVIEW
John M O'Donnell, Brian M Devitt, Manit Arora
The ligamentum teres (LT) has traditionally been described as a redundant structure with no contribution to hip biomechanics or function. There has been renewed interest in the LT as a source of hip pathology due to the high prevalence of LT pathology observed at the time of hip arthroscopy. The LT acts a secondary stabilizer to supplement the work of the capsular ligaments and works in a sling-like manner to prevent subluxation of the hip at the extremes of motion. The presence of free nerve endings within the LT indicates a definite role in pain generation, with the LT undergoing various mechanical and histological adaptations to hip pathology...
January 2018: Journal of Hip Preservation Surgery
https://www.readbyqxmd.com/read/29419321/the-potential-role-of-variations-in-juvenile-hip-geometry-on-the-development-of-legg-calv%C3%A3-perthes-disease-a-biomechanical-investigation
#5
Manuel da Silva Pinheiro, Catherine Dobson, Nicholas M Clarke, Michael Fagan
Legg-Calvé-Perthes disease (LCP) is one of the most poorly understood diseases in paediatric orthopaedics. One common trait of LCP is the marked morphological difference between healthy and pathological hips, early deviations of which (i.e. prior to disease onset) have been suggested to lead to the overload and collapse of the epiphysis. Here, the impact of common variations in geometry is investigated with a finite element model of a juvenile femur under single leg standing and landing. Here, the impact of typical variations in geometry is investigated with a finite element model of a juvenile femur under single leg standing and landing...
February 8, 2018: Computer Methods in Biomechanics and Biomedical Engineering
https://www.readbyqxmd.com/read/29416969/-in-round-labral-repair-after-acetabular-recession-using-intermittent-traction
#6
Nathan W Skelley, William K Conaway, Scott D Martin
The prevalence of hip arthroscopy has increased exponentially with the advent of arthroscopic labral repair techniques for femoroacetabular impingement. The goal of arthroscopic labral repair is to re-create the anatomic suction seal of the labrum against the femoral head. This important anatomic relationship has been demonstrated in several biomechanical studies. Performing the acetabular recession and evaluating the congruity of labral repairs during surgery is difficult with the application of traction distracting the femoral head from the chondrolabral junction...
October 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/29413788/biomechanical-characteristics-of-lower-limb-gait-waveforms-associations-with-body-fat-in-children
#7
Ryan Mahaffey, Stewart C Morrison, Paul Bassett, Wendy I Drechsler, Mary C Cramp
BACKGROUND: Childhood obesity is associated with musculoskeletal dysfunction and altered lower limb biomechanics during gait. Few previous studies have explored relationships between childhood obesity measured by body fat and lower limb joint waveform kinematics and kinetics. RESEARCH QUESTION: What is the association between body fat and hip, knee and ankle joint angles and moments during gait and in 7 to 11 year-old boys? METHODS: Fifty-five boys participated in the study...
February 2, 2018: Gait & Posture
https://www.readbyqxmd.com/read/29407863/biomechanics-of-a-cemented-short-stem-standard-vs-line-to-line-cementation-techniques-a-biomechanical-in-vitro-study-involving-six-osteoporotic-pairs-of-human-cadaver-femurs
#8
Karl Philipp Kutzner, Tobias Freitag, Ralf Bieger, Heiko Reichel, Joachim Pfeil, Anita Ignatius, Lutz Dürselen
BACKGROUND: Short-stem total hip arthroplasty (THA) potentially offers advantages compared to conventional THA, including sparing bone and soft tissue and being a facilitated and less traumatic implantation. However, the indication is limited to patients with sufficient bone quality. Cemented short-stem THA might provide an alternative to conventional cemented THA. To date, no cemented short stem is available on the market. METHODS: In the present in vitro study, primary stability of a new cemented short stem was evaluated, comparing standard (undersized stem) versus line-to-line (same-sized stem) cementing techniques, using six pairs of human cadaver femurs...
January 24, 2018: Clinical Biomechanics
https://www.readbyqxmd.com/read/29405367/the-influence-of-evolution-on-cam-deformity-and-its-impact-on-biomechanics-of-the-human-hip-joint
#9
REVIEW
Helen Anwander, Martin Beck, Lorenz Büchler
Anatomy and biomechanics of the human hip joint are a consequence of the evolution of permanent bipedal gait. Habitat and behaviour have an impact on hip morphology and significant differences are present even within the same biological family. The forces acting upon the hip joint are mainly a function of gravitation and strength of the muscles. Acetabular and femoral anatomy ensure an inherently stable hip with a wide range of motion. The femoral head in first human ancestors with upright gait was spherical (coxa rotunda)...
February 5, 2018: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29396468/alterations-of-pregnant-gait-during-pregnancy-and-post-partum
#10
Qichang Mei, Yaodong Gu, Justin Fernandez
Physique changes during pregnancy lead to gait characteristic variations. This study aimed to analyse gait of pregnant individuals throughout pregnancy and post-partum. Sixteen healthy pregnant women volunteered as participants and had their lower limb kinematics analysed through a VICON three-dimensional motion system and plantar pressure measured with a Novel EMED force plate. Significant changes were observed in pelvic anterior motion, hip and ankle joint kinematics. Mean pressure distribution and COP trajectory deviation altered accordingly with increased pregnancy time, compared with post-partum...
February 2, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29395227/the-relationships-between-physical-capacity-and-biomechanical-plasticity-in-old-adults-during-level-and-incline-walking
#11
Daniel Kuhman, John Willson, J C Mizelle, Paul DeVita
Old compared to young adults exhibit increased hip and decreased ankle mechanical output during walking - a phenomenon known as biomechanical plasticity. Previous comparison studies suggest that low compared to high capacity old adults exhibit larger magnitudes of this plasticity, however the precise relationship between capacity and plasticity magnitude remains unclear. The purpose of this study was to quantify the relationships between physical capacity and biomechanical plasticity magnitude during level and incline walking...
January 17, 2018: Journal of Biomechanics
https://www.readbyqxmd.com/read/29377951/radiographic-cup-position-following-posterior-and-lateral-approach-to-total-hip-arthroplasty-an-explorative-randomized-controlled-trial
#12
Christine Kruse, Signe Rosenlund, Leif Broeng, Søren Overgaard
The two most common surgical approaches to total hip arthroplasty are the posterior approach and lateral approach. The surgical approach may influence cup positioning and restoration of the offset, which may affect the biomechanical properties of the hip joint. The primary aim was to compare cup position between posterior approach and lateral approach. Secondary aims were to compare femoral offset, abductor moment arm and leg length discrepancy between the two approaches. Eighty patients with primary hip osteoarthritis were included in a randomized controlled trial and assigned to total hip arthroplasty using posterior approach or lateral approach...
2018: PloS One
https://www.readbyqxmd.com/read/29374491/prosthetic-energy-return-during-walking-increases-after-3%C3%A2-weeks-of-adaptation-to-a-new-device
#13
Samuel F Ray, Shane R Wurdeman, Kota Z Takahashi
BACKGROUND: There are many studies that have investigated biomechanical differences among prosthetic feet, but not changes due to adaptation over time. There is a need for objective measures to quantify the process of adaptation for individuals with a transtibial amputation. Mechanical power and work profiles are a primary focus for modern energy-storage-and-return type prostheses, which strive to increase energy return from the prosthesis. The amount of energy a prosthesis stores and returns (i...
January 27, 2018: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/29362256/the-experience-of-living-with-patellofemoral-pain-loss-confusion-and-fear-avoidance-a-uk-qualitative-study
#14
Benjamin E Smith, Fiona Moffatt, Paul Hendrick, Marcus Bateman, Michael Skovdal Rathleff, James Selfe, Toby O Smith, Pip Logan
OBJECTIVES: To investigate the experience of living with patellofemoral pain (PFP). DESIGN: Qualitative study design using semistructured interviews and analysed thematically using the guidelines set out by Braun and Clarke. SETTING: A National Health Service physiotherapy clinic within a large UK teaching hospital. PARTICIPANTS: A convenience sample of 10 participants, aged between 18 and 40 years, with a diagnosis of PFP and on a physiotherapy waiting list, prior to starting physiotherapy...
January 23, 2018: BMJ Open
https://www.readbyqxmd.com/read/29354968/-kinetic-mechanism-of-electroacupuncture-for-stair-climbing-in-knee-osteoarthritis-patients
#15
Xiangbin Wang, Xuerong Xie, Meijin Hou, Xiaoling Wang, Jian Chen, Jiao Yu, Xiang Li
OBJECTIVE: To observe the kinetic change that reflects joint loading in different planes during stair climbing in knee osteoarthritis (KOA) after electroacupuncture (EA) by three-dimensional motion analysis, so as to provide reference for its biomechanical mechanism treated with acupuncture. METHODS: Forty KOA patients, in accordance with the random number table, were assigned into an observation group and a control group, 20 cases in each one and finally 18 cases completed...
October 12, 2017: Zhongguo Zhen Jiu, Chinese Acupuncture & Moxibustion
https://www.readbyqxmd.com/read/29353742/trunk-pelvis-and-hip-biomechanics-in-individuals-with-femoroacetabular-impingement-syndrome-strategies-for-step-ascent
#16
Laura E Diamond, Kim L Bennell, Tim V Wrigley, Rana S Hinman, Michelle Hall, John O'Donnell, Paul W Hodges
BACKGROUND: Femoroacetabular impingment (FAI) syndrome is common among young active adults and a proposed risk factor for the future development of hip osteoarthritis. Pain is dominant and drives clinical decision-making. Evidence for altered hip joint function in this patient population is inconsistent, making the identification of treatment targets challenging. A broader assessment, considering adjacent body segments (i.e. pelvis, trunk) and individual movement strategies, may better inform treatment programs...
January 11, 2018: Gait & Posture
https://www.readbyqxmd.com/read/29349029/puncture-capsulotomy-during-hip-arthroscopy-for-femoroacetabular-impingement-preserving-anatomy-and-biomechanics
#17
William K Conaway, Scott D Martin
We describe an arthroscopic technique for the treatment of labral pathology and femoroacetabular impingement that provides excellent access to the central and peripheral compartments while preserving the biomechanically crucial components of hip joint stability. The hip capsule and the ligaments within it have been shown to be integral to hip biomechanical stability. Other popular techniques such as interportal and T-capsulotomy inherently damage the capsuloligamentous complex of the hip and can be associated with postoperative gross instability, micro-instability, heterotopic ossification, and seroma...
December 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/29342060/creep-and-wear-in-vitamin-e-infused-highly-cross-linked-polyethylene-cups-for-total-hip-arthroplasty-a-prospective-randomized-controlled-trial
#18
G Rochcongar, G Buia, E Bourroux, J Dunet, V Chapus, C Hulet
BACKGROUND: Aseptic loosening, the most common indication for revision surgery in total hip arthroplasty, can result from osteolysis caused by polyethylene (PE) wear particles. PE wear is increased by age-related oxidation of PE and free radicals emerging during irradiation cross-linking. Diffusion of vitamin E into PE stabilizes free radicals to maintain the biomechanical properties of PE. The purpose of this study was to determine whether vitamin E-infused highly cross-linked PE cups could reduce wear rates...
January 17, 2018: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/29339984/functional-vs-traditional-analysis-in-biomechanical-gait-data-an-alternative-statistical-approach
#19
Jihong Park, Matthew K Seeley, Devin Francom, C Shane Reese, J Ty Hopkins
In human motion studies, discrete points such as peak or average kinematic values are commonly selected to test hypotheses. The purpose of this study was to describe a functional data analysis and describe the advantages of using functional data analyses when compared with a traditional analysis of variance (ANOVA) approach. Nineteen healthy participants (age: 22 ± 2 yrs, body height: 1.7 ± 0.1 m, body mass: 73 ± 16 kg) walked under two different conditions: control and pain+effusion. Pain+effusion was induced by injection of sterile saline into the joint capsule and hypertonic saline into the infrapatellar fat pad...
December 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29339174/the-impact-of-strabismus-surgery-on-gait-pattern-in-patients-with-congenital-or-starting-within-one-year-of-age-strabismus
#20
Enrica Sipio, Anna Dickmann, Irene Aprile, Marco Germanotta, Chiara Simbolotti, Annabella Salerni, Gustavo Savino, Luca Padua
Strabismus is a common visual disorder that negatively affects walking and balance. Therapeutic interventions for strabismus include strabismus surgery. Few studies investigated the relationship between strabismus surgery and postural control while, to the best of our knowledge, none has been conducted to assess the influence of strabismus surgery on gait. Therefore, the aim of this study was to evaluate the locomotion characteristics over patients with congenital or starting within one year of age strabismus, one month and three months after strabismus surgery...
January 12, 2018: Neuroscience Letters
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