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https://www.readbyqxmd.com/read/28918594/the-association-of-knee-structural-pathology-with-pain-at-the-knee-is-modified-by-pain-at-other-sites-in-those-with-knee-osteoarthritis
#1
Feng Pan, Jing Tian, Dawn Aitken, Flavia Cicuttini, Tania Winzenberg, Graeme Jones
The objective of this study was to investigate the associations of knee structural abnormalities with different patterns of pain. A total of 891 participants (average age 63 years; range 50 to 80 years) participated in this study. Presence of pain at the neck, back, hands, shoulders, hips, knees, and feet was assessed by questionnaire. Participants were categorized as having no pain at any site (no pain), pain only at the knee (KP), pain at other sites but not the knee (OP), and pain at the knee and other sites (KOP)...
September 16, 2017: Clinical Rheumatology
https://www.readbyqxmd.com/read/28918356/what-is-the-price-for-the-duchenne-gait-pattern-in-patients-with-cerebral-palsy
#2
Firooz Salami, Mirjam Niklasch, Britta K Krautwurst, Thomas Dreher, Sebastian I Wolf
Duchenne gait is characterized by trunk lean towards the affected stance limb with the pelvis stable or elevated on the swinging limb side during single limb stance phase. We assessed the relationship between hip abduction moments and trunk kinetics in patients with cerebral palsy showing excessive lateral trunk motion. Data of 18 subjects with bilateral spastic cerebral palsy (CP) and 20 aged matched typically developing subjects (TD) were collected retrospectively. Criteria for patient selection were barefoot walking without aid presenting with excessive lateral trunk motion...
September 7, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28918008/a-finite-element-study-on-the-mechanical-response-of-the-head-neck-interface-of-hip-implants-under-realistic-forces-and-moments-of-daily-activities-part-2
#3
Khosro Fallahnezhad, Hamidreza Farhoudi, Reza H Oskouei, Mark Taylor
A finite element model was developed to investigate the effect of loading regimes caused by various daily activities on the mechanical behaviour of the head-neck taper junction in modular hip replacements. The activities included stair up, stair down, sit to stand, stand to sit, one leg standing and knee bending. To present the real mechanical environment of the junction, in addition to the force components, the frictional moments produced by the frictional sliding of the head and cup were applied to a CoCr/CoCr junction having a 12/14 taper with a proximal mismatch angle of 0...
September 7, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28913407/early-intraprosthetic-dislocation-in-dual-mobility-implants-a%C3%A2-systematic-review
#4
Ivan De Martino, Rocco D'Apolito, Bradford S Waddell, Alexander S McLawhorn, Peter K Sculco, Thomas P Sculco
BACKGROUND: Dual mobility implants are subject to a specific implant-related complication, intraprosthetic dislocation (IPD), in which the polyethylene liner dissociates from the femoral head. For older generation designs, IPD was attributable to late polyethylene wear and subsequent failure of the head capture mechanism. However, early IPDs have been reportedly affecting contemporary designs. METHODS: A systematic review of the literature according to the preferred reporting items for systematic reviews and meta-analyses guidelines was performed...
September 2017: Arthroplasty Today
https://www.readbyqxmd.com/read/28903900/genetics-association-study-and-functional-analysis-on-osteoporosis-susceptibility-gene-bdnf
#5
Man Yang, Bing-Jie Lu, Yuan-Yuan Duan, Xiao-Feng Chen, Jian-Gang Ma, Yan Guo
To explore the relationship between brain-derived neurotrophic factor (BDNF) gene and bone mineral density (BMD) in Chinese Han population, we performed association analysis of 14 tag SNPs on BDNF gene with hip/spine BMD in 1300 Han Chinese samples from Shaanxi Province. We found that 8 of the 14 SNPs were significantly associated with hip or spine BMD (P < 0.05). Moreover, the SNP rs16917237 was significantly associated with both hip and spine BMD, with significant Bonferroni correlation (P value 0.05/14 = 0...
August 20, 2017: Yi Chuan, Hereditas
https://www.readbyqxmd.com/read/28900562/a-biomechanical-comparison-among-three-kinds-of-rebound-type-jumps-in-female-collegiate-athletes
#6
Miki Nariai, Naruto Yoshida, Atsushi Imai, Kazumichi Ae, Ryo Ogaki, Hirokazu Suhara, Hitoshi Shiraki
BACKGROUND: Single-legged drop jumps (SDJ), single-legged repetitive jumps (SRJ), and single-legged side hops (SSH) are often used as plyometric training and functional performance tests. Differences in the kinetics and kinematic characteristics of lower extremity joints during these jumps are unclear. HYPOTHESIS/PURPOSE: The purpose of this study was to investigate the joint motion and mechanical work of the takeoff leg from foot contact to foot-off during SDJ, SRJ, and SSH in the sagittal and frontal planes in female athletes...
August 2017: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/28893491/micro-finite-element-method-to-assess-elastic-properties-of-trabecular-bone-at-micro-and-macroscopic-level
#7
R Rieger, J C Auregan, T Hoc
OBJECTIVE OF THE STUDY: The objective of the present study is to assess the mechanical behavior of trabecular bone based on microCT imaging and micro-finite-element analysis. In this way two methods are detailed: (i) direct determination of macroscopic elastic property of trabecular bone; (ii) inverse approach to assess mechanical properties of trabecular bone tissue. PATIENTS: Thirty-five females and seven males (forty-two subjects) mean aged (±SD) 80±11.7 years from hospitals of Assistance publique-Hôpitaux de Paris (AP-HP) diagnosed with osteoporosis following a femoral neck fracture due to a fall from standing were included in this study...
September 8, 2017: Morphologie: Bulletin de L'Association des Anatomistes
https://www.readbyqxmd.com/read/28889010/pain-in-osteoarthritis-implications-for-optimal-management
#8
Anne-Priscille Trouvin, Serge Perrot
Pain is an ubiquitous symptom in osteoarticular diseases, occurring much more commonly than stiffness or disability. OA of the knee, hand, or hip affects around 20% of adults in various populations and is dramatically increasing in many countries, mostly related to age and obesity, leading to an increased number of people having OA pain, and creating a huge burden related to disability and health care costs. OA-related pain, has been classically considered to be a nociceptive pain condition. Clinicians have considered pain to be an alarm signal, correlated to the intensity of joint degradation...
September 6, 2017: Joint, Bone, Spine: Revue du Rhumatisme
https://www.readbyqxmd.com/read/28888789/modal-analysis-for-the-assessment-of-cementless-hip-stem-primary-stability-in-preoperative-tha-planning
#9
Andres Rondon, Elhadi Sariali, Quentin Vallet, Quentin Grimal
This numerical vibration finite element (FE) study introduces resonance three-dimensional planning (RP3D) to assess preoperatively the primary stability of a cementless stem for total hip arthroplasty. Based on a patient's CT-scan and a numerical model of a stem, RP3D aims at providing mechanical criteria indicative of the achievable primary stability. We investigate variations of the modal response of the stem to changes of area and apparent stiffness of the bone-implant interface. The model is computationally cheap as it does not include a mesh of the bone...
September 6, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28887488/the-chemical-form-of-metal-species-released-from-corroded-taper-junctions-of-hip-implants-synchrotron-analysis-of-patient-tissue
#10
Anna Di Laura, Paul D Quinn, Vasiliki C Panagiotopoulou, Harry S Hothi, Johann Henckel, Jonathan J Powell, Fitim Berisha, Fernanda Amary, J Fred W Mosselmans, John A Skinner, Alister J Hart
The mechanisms of metal release from the articulation at the head cup bearing and the tapered junctions of orthopaedic hip implants are known to differ and the debris generated varies in size, shape and volume. Significantly less metal is lost from the taper junction between Cobalt-Chromium-Molybdenum (CoCrMo) and Titanium (Ti) components (fretting-corrosion dominant mechanism), when compared to the CoCrMo bearing surfaces (wear-corrosion dominant mechanism). Corrosion particles from the taper junction can lead to Adverse Reactions to Metal Debris (ARMD) similar to those seen with CoCrMo bearings...
September 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28882166/social-determinants-of-common-metabolic-risk-factors-high-blood-pressure-high-blood-sugar-high-body-mass-index-and-high-waist-hip-ratio-of-major-non-communicable-diseases-in-south-asia-region-a-systematic-review-protocol
#11
Sudesh Raj Sharma, Shiva Raj Mishra, Kusum Wagle, Rachel Page, Anna Matheson, Danielle Lambrick, James Faulkner, David Lounsbury, Abhinav Vaidya
BACKGROUND: Prevalence of non-communicable diseases has been increasing at a greater pace in developing countries and, in particular, the South Asia region. Various behavioral, social and environmental factors present in this region perpetuate common metabolic risk factors of non-communicable diseases. This study will identify social determinants of common metabolic risk factors of major non-communicable diseases in the context of the South Asian region and map their causal pathway. METHODS: A systematic review of selected articles will be carried out following Cochrane guidelines...
September 7, 2017: Systematic Reviews
https://www.readbyqxmd.com/read/28879474/pregnancy-related-fractures-a-retrospective-study-of-a-french-cohort-of-52-patients-and-review-of-the-literature
#12
M Laroche, M Talibart, C Cormier, C Roux, P Guggenbuhl, Y Degboe
A retrospective, multicentre study involving 52 patients was carried out to define the causes and characteristics of pregnancy-related osteoporosis. The mean number of vertebral fractures occurring during the last trimester of pregnancy or at the time of delivery was 3.8. This is often promoted by risk factors before or during pregnancy. INTRODUCTION: In order to define the causes or predisposing factors of pregnancy-related osteoporosis and its clinical, radiological and bone density characteristics, laboratory findings, course and outcome, we carried out a retrospective multicentre study...
September 6, 2017: Osteoporosis International
https://www.readbyqxmd.com/read/28878533/the-importance-of-pelvic-ring-stabilization-as-a-life-saving-measure-in-pre-hospital-a-case-report-commented-by-autopsy
#13
Carlos Durão, Magda Alves, André Barros, Frederico Pedrosa
Hip fractures with unstable pelvic ring have great morbidity and mortality rates. These fractures result from high energy trauma such as falls from heights, road accidents and collapsing structures or other similar mechanisms of action. We report the case of a 63 years old man, construction worker, who stood inside a ditch during a wall construction when he was surprised by this collapse, which resulted in direct trauma to the right thigh and pelvis. The autopsy revealed diaphysis fracture of the right femur with an open book pelvic fracture with severe hemorrhagic infiltration and hematoma of the pelvic muscles without arterial injury...
August 2017: Journal of Clinical Orthopaedics and Trauma
https://www.readbyqxmd.com/read/28878517/comparison-of-metal-ion-levels-in-patients-with-hip-resurfacing-versus-total-hip-arthroplasty
#14
Craig W Forsthoefel, Nicholas M Brown, Mark L Barba
Mechanical wear at the articular surface and corrosive processes at modular junctions, such as the trunnion, are responsible for metal ions production. We retrospectively reviewed 64 patients who underwent THA with a metal on metal bearing surface and 34 patients with hip Resurfacing. Metal ion measurements, six-week post-op radiographs, and functional scores were included in the analysis. Cobalt ion levels were significantly elevated in THA patients, 2.95 μg/L as compared to resurfacing patients, (2.95 versus 1...
December 2017: Journal of Orthopaedics
https://www.readbyqxmd.com/read/28875313/hip-fracture-risk-in-patients-with-burn-injury-a-retrospective-cohort-study-in-taiwan
#15
O Kaewboonchoo, F C Sung, C L Lin, H C Hsu, C T Kuo
This work aimed to evaluate the hip fracture risk for patients with burn injury. A total of 16,430 patients with burn injury had an adjusted hazard ratio of 1.54 to encounter a hip fracture, compared with controls without the injury. These results encourage future studies focusing on mechanisms leading to fracture associated with burn injury. INTRODUCTION: The relationship between burn injury and hip fracture risk is unclear. We conducted a retrospective cohort study to investigate this relationship...
September 5, 2017: Osteoporosis International
https://www.readbyqxmd.com/read/28874974/evaluation-of-sagittal-spine-pelvis-lower-limb-alignment-in-elderly-women-with-pelvic-retroversion-while-standing-and-walking-using-a-three-dimensional-musculoskeletal-model
#16
Ken Sasaki, Michio Hongo, Naohisa Miyakoshi, Toshiki Matsunaga, Shin Yamada, Hiroaki Kijima, Yoichi Shimada
STUDY DESIGN: In vivo biomechanical study using a three-dimensional (3D) musculoskeletal model for elderly individuals with or without pelvic retroversion. PURPOSE: To evaluate the effect of pelvic retroversion on the sagittal alignment of the spine, pelvis, and lower limb in elderly females while standing and walking. OVERVIEW OF LITERATURE: Patients with hip-spine syndrome have concurrent hip-joint and spine diseases. However, the dynamic sagittal alignment between the hip joint and spine has rarely been investigated...
August 2017: Asian Spine Journal
https://www.readbyqxmd.com/read/28873093/machine-learning-techniques-for-the-optimization-of-joint-replacements-application-to-a-short-stem-hip-implant
#17
Myriam Cilla, Edoardo Borgiani, Javier Martínez, Georg N Duda, Sara Checa
Today, different implant designs exist in the market; however, there is not a clear understanding of which are the best implant design parameters to achieve mechanical optimal conditions. Therefore, the aim of this project was to investigate if the geometry of a commercial short stem hip prosthesis can be further optimized to reduce stress shielding effects and achieve better short-stemmed implant performance. To reach this aim, the potential of machine learning techniques combined with parametric Finite Element analysis was used...
2017: PloS One
https://www.readbyqxmd.com/read/28872111/method-and-instrumented-fixture-for-femoral-fracture-testing-in-a-sideways-fall-on-the-hip-position
#18
Dan Dragomir-Daescu, Asghar Rezaei, Timothy Rossman, Susheil Uthamaraj, Rachel Entwistle, Sean McEligot, Vincent Lambert, Hugo Giambini, Iwona Jasiuk, Michael J Yaszemski, Lichun Lu
Mechanical testing of femora brings valuable insights into understanding the contribution of clinically-measureable variables such as bone mineral density distribution and geometry on the femoral mechanical properties. Currently, there is no standard protocol for mechanical testing of such geometrically complex bones to measure strength, and stiffness. To address this gap we have developed a protocol to test cadaveric femora to fracture and to measure their biomechanical parameters. This protocol describes a set of adaptable fixtures to accommodate the various load magnitudes and directions accounting for possible bone orientations in a fall on the hip configuration, test speed, bone size, and left leg-right leg variations...
August 17, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28869812/the-effects-of-prosthetic-foot-stiffness-on-transtibial-amputee-walking-mechanics-and-balance-control-during-turning
#19
Courtney E Shell, Ava D Segal, Glenn K Klute, Richard R Neptune
BACKGROUND: Little evidence exists regarding how prosthesis design characteristics affect performance in tasks that challenge mediolateral balance such as turning. This study assesses the influence of prosthetic foot stiffness on amputee walking mechanics and balance control during a continuous turning task. METHODS: Three-dimensional kinematic and kinetic data were collected from eight unilateral transtibial amputees as they walked overground at self-selected speed clockwise and counterclockwise around a 1-meter circle and along a straight line...
August 15, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28869620/the-influence-of-the-cumulated-deformation-energy-in-the-measurement-by-the-dsi-method-on-the-selected-mechanical-properties-of-bone-tissues
#20
Anna M Makuch, Konstanty R Skalski, Marek Pawlikowski
PURPOSE: The goal of the study was to determine the influence of DSI test conditions, i.e., loading/unloading rates, hold time, and the value of the maximum loading force on selected mechanical properties of trabecular bone tissue. METHODS: The test samples were resected from a femoral head of a patient qualified for a hip replacement surgery. During the DSI tests hardness (HV, HM, HIT) and elastic modulus (EIT) of trabecular bone tissue were measured using the Micro Hardness Tester (MHT, CSEM)...
2017: Acta of Bioengineering and Biomechanics
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