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femoral neck stress fracture

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https://www.readbyqxmd.com/read/29658534/the-influence-of-osteoporotic-bone-structures-of-the-pelvic-hip-complex-on-stress-distribution-under-impact-load
#1
Katarzyna Arkusz, Tomasz Klekiel, Niezgoda Niezgoda, Romuald Będziński
PURPOSE: The aim of this study was to determine the effect of bone mineral density (BMD) on the stress distribution in pelvic-hip complex (PHC) model which included bone structures and soft tissues. Bone mass changes in osteoporosis and osteopenia were considered in this analysis. In addition, the relations between force direction and stress distribution causing PHC fractures were determined. METHODS: This paper presents the development and validation of a detailed 3D finite element model with high anatomical fidelity of the PHC and BMD changes in trabecular and cortical bones, modelled based on CT scans...
2018: Acta of Bioengineering and Biomechanics
https://www.readbyqxmd.com/read/29607767/femoral-neck-stress-fracture-in-a-female-runner
#2
Meghan A Lamothe, James M Elliott, Alison H Chang
A 23-year-old woman was referred to physical therapy by her primary care physician for a 4-week history of right groin pain that had progressively worsened while training for a half-marathon. Before the physical therapy referral, the primary care physician ordered radiography of the right hip, which was unremarkable for fracture. Following examination, the physical therapist suspected osseous or soft tissue abnormality and requested that the primary care physician order magnetic resonance imaging without contrast, which revealed a femoral neck stress fracture...
April 2018: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/29576639/total-hip-arthroplasty-by-the-direct-anterior-approach-using-a-neck-preserving-stem-safety-efficacy-and-learning-curve
#3
Aditya Khemka, Omar Mograby, Sarah J Lord, Zelda Doyle, Munjed Al Muderis
Background: The concept of femoral neck preservation in total hip replacement (THR) was introduced in 1993. It is postulated that retaining cortical bone of the femoral neck offers triplanar stability, uniform stress distribution, and accommodates physiological anteversion. However, data on safety, efficacy and learning curve are lacking. Materials and Methods: We prospectively assessed all patients who were operated for a THR with a short neck preserving stem (MiniHip) between 2012 and 2014...
March 2018: Indian Journal of Orthopaedics
https://www.readbyqxmd.com/read/29564374/early-fracture-of-the-modular-neck-of-a-modulus-femoral-stem
#4
Katsufumi Uchiyama, Takeaki Yamamoto, Mitsutoshi Moriya, Kensuke Fukushima, Yojiro Minegishi, Naonobu Takahira, Masashi Takaso
We present the case of a 46-year-old woman who underwent revision surgery approximately 4 years after total hip arthroplasty because of a fracture of the modular neck of a MODULUS femoral stem. The fractured surfaces of the retrieved implant were inspected using optical and scanning electron microscopy. Three-dimensional finite element analysis was also performed to identify the stresses that might have caused the failure. We concluded that active, obese patients who are implanted with a high-offset, small-sized modular component could experience stress-induced fractures of the modular neck, with proper fixation and osseointegration of the distal stem, especially if residual bone or tissue is present on the inner surface of the neck that could contribute to micromovement and decreased proximal fixation...
June 2017: Arthroplasty Today
https://www.readbyqxmd.com/read/29548016/overuse-injuries-among-female-combat-warriors-in-the-israeli-defense-forces-a-cross-sectional-study
#5
Oren Schwartz, Itzik Malka, Cara H Olsen, Israel Dudkiewicz, Tarif Bader
Introduction: Integration of females in combat units poses a unique challenge for army commanders around the world. The purpose of this study is to provide a detailed up-to-date situation report regarding overuse injuries among combat female warriors in the IDF (Israeli Defense Forces) in order to enable evidence-based decision-making, prevention policy, and further research of this highly significant military public health issue. Methods: A cross-sectional descriptive study was conducted including 2,519 females recruited to combat duties during the year of 2013...
March 14, 2018: Military Medicine
https://www.readbyqxmd.com/read/29526781/comparison-of-femoral-strength-and-fracture-risk-index-derived-from-dxa-based-finite-element-analysis-for-stratifying-hip-fracture-risk-a-cross-sectional-study
#6
Shuman Yang, Yunhua Luo, Lang Yang, Enrico Dall'Ara, Richard Eastell, Andrew L Goertzen, Eugene V McCloskey, William D Leslie, Lisa M Lix
BACKGROUND: Dual-energy X-ray absorptiometry (DXA)-based finite element analysis (FEA) has been studied for assessment of hip fracture risk. Femoral strength (FS) is the maximum force that the femur can sustain before its weakest region reaches the yielding limit. Fracture risk index (FRI), which also considers subject-specific impact force, is defined as the ratio of von Mises stress induced by a sideways fall to the bone yield stress over the proximal femur. We compared risk stratification for prior hip fracture using FS and FRI derived from DXA-based FEA...
March 8, 2018: Bone
https://www.readbyqxmd.com/read/29515648/analysis-of-the-impact-of-configuration-of-the-stabilisation-system-for-femoral-diaphyseal-fractures-on-the-state-of-stresses-and-displacements
#7
Jakub J Słowiński, Konrad Kudłacik
Introduction: The treatment of femoral diaphyseal fractures by intramedullary nailing has become a common procedure in orthopaedic surgery. The purpose of this numerical simulation was to present how the changes in configuration of the stabilisation system can affect the stress and displacement state in the bone tissue and implanted device. Material and Methods: The numerical comparison of the stabilisation variants for the type 32-A2 femoral diaphyseal fracture (according to the AO classification) performed by using the Charfix2 (ChM®) anatomical nail locked in a number of chosen ways...
2018: Applied Bionics and Biomechanics
https://www.readbyqxmd.com/read/29509266/effects-of-ulinastatin-on-inflammatory-response-and-cognitive-function-after-hip-arthroplasty-for-the-elderly-patients-with-femoral-neck-fracture
#8
K-W Ren, N Shen, J-L Tang, L-M Nong, Y-Q Gu
OBJECTIVE: To investigate the effects of ulinastatin on inflammatory response and cognitive function after hip arthroplasty for the elderly patients with femoral neck fracture. PATIENTS AND METHODS: A total of 80 patients with femoral neck fracture receiving hip arthroplasty in our hospital from August 2016 to February 2017 were selected and divided into observation group (n=40) and control group (n=40) using a random number table. The control group was treated with hip arthroplasty and symptomatic and supportive treatment after operation, while the observation group was treated with ulinastatin based on the treatment means of control group...
February 2018: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/29457411/-effect-of-hip-fracture-at-different-sites-in-elderly-patients-on-prognosis
#9
Cheng Peng, Xiao-Wei Wang, Shao-Guang Li, Zhi Liu, Tian-Sheng Sun, Jian-Zheng Zhang
OBJECTIVE: To determine the effect of site of fracture on the prognosis for patients of elderly hip fracture. METHODS: From January 2012 to December 2014, 667 patients with hip fractures were divided into femoral neck fracture group and intertrochanteric fracture group according to the site of fracture. There were 304 cases of intertrochanteric fracture, including 96 males and 208 females, with an average age of (80.33±7.94) years old. There were 217 cases of femoral neck fracture, including 74 males and 143 females, with an average age of (79...
October 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29336599/femoral-neck-stress-injuries-analysis-of-156-cases-in-a-u-s-military-population-and-proposal-of-a-new-mri-classification-system
#10
Iván R Rohena-Quinquilla, Fabian J Rohena-Quinquilla, William F Scully, J Richard Lee Evanson
OBJECTIVE: The objective of this study is to formulate a new MRI classification system for fatigue-type femoral neck stress injuries (FNSIs) that is based on patient management and return-to-duty (RTD) time. MATERIALS AND METHODS: A retrospective review of 156 consecutive FNSIs in 127 U.S. Army soldiers over a 24-month period was performed. The width of marrow edema for low-grade FNSIs and the measurement of macroscopic fracture as a percentage of femoral neck width for high-grade FNSIs were recorded...
March 2018: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/29283748/femoral-neck-stress-in-older-adults-during-stair-ascent-and-descent
#11
Chen Deng, Jason C Gillette, Timothy R Derrick
A detailed understanding of the hip loading environment is needed to help prevent hip fractures, minimize hip pain, rehabilitate hip injuries and design osteogenic exercises for the hip. The purpose of this study was to compare femoral neck stress during stair ascent and descent and to identify the contribution of muscles and reaction forces to the stress environment in mature adult subjects (n=17; age: 50-65 years). Motion analysis and inverse dynamics were combined with musculoskeletal modelling and optimization, then used as input to an elliptical femoral neck cross-section model to estimate femoral neck stress...
December 28, 2017: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/29277713/clinical-hip-fracture-is-accompanied-by-compression-induced-failure-in-the-superior-cortex-of-the-femoral-neck
#12
Tengteng Tang, Peter A Cripton, Pierre Guy, Heather A McKay, Rizhi Wang
Hip fractures pose a major health problem throughout the world due to their devastating impact. Current theories for why these injuries are so prevalent in the elderly point to an increased propensity to fall and decreases in bone mass with ageing. However, the fracture mechanisms, particularly the stress and strain conditions leading to bone failure at the hip remain unclear. Here, we directly examined the cortical bone from clinical intra-capsular hip fractures at a microscopic level, and found strong evidence of compression induced failure in the superior cortex...
March 2018: Bone
https://www.readbyqxmd.com/read/29244693/bilateral-simultaneous-femoral-neck-stress-fracture-despite-clinical-recovery-from-anorexia-nervosa-a-case-report
#13
Jacques Hernigou, Simon Koulischer, Renaud Maes
CASE: A 38-year-old woman who had returned to sports activity (running) after having clinically recovered from anorexia nervosa presented with a bilateral femoral neck stress fracture that was treated with bilateral hip osteosynthesis. CONCLUSION: Although exercise is usually considered to be beneficial for health, heavy exercise (such as running) after recovery from anorexia nervosa may be associated with an increased risk of fracture.
January 2017: JBJS Case Connector
https://www.readbyqxmd.com/read/29223594/femoral-neck-fractures-after-removal-of-hardware-in-healed-trochanteric-fractures
#14
REVIEW
Antonio Barquet, Peter V Giannoudis, Andrés Gelink
INTRODUCTION: Hardware removal in healed trochanteric fractures (TF) in the absence of infection or significant mechanical complications is rarely indicated. However, in patients with persistent pain, prominent material and discomfort in the activities of daily living, the implant is eventually removed. Publications of ipsilateral femoral neck fracture after removal of implants from healed trochanteric fractures (FNFARIHTF) just because of pain or discomfort are rare. The purpose of this systematic review of the literature is to report on the eventual risk factors, the mechanisms, the clinical presentation, and frequency, and to pay special emphasis in their prevention...
December 2017: Injury
https://www.readbyqxmd.com/read/29181361/insufficiency-fractures-at-unusual-sites-a-case-series
#15
Raju Vaishya, Amit Kumar Agarwal, Paras Kumar Banka, Vipul Vijay, Abhishek Vaish
Introduction: Insufficiency fractures (IFs) are a subtype of stress fractures commonly associated with osteoporosis and Vitamin D deficiency. These nontraumatic fractures often occur in the pelvis and spine, but the involvement of other unusual sites is also not very uncommon. Plain radiographs and magnetic resonance imaging scan are the most commonly used imaging modalities for the diagnosis of IF. Case Report: We are presenting a series of five cases of IFs at unusual sites, along with a detailed literature review on this individual...
July 2017: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/29167969/association-of-incident-hip-fracture-with-the-estimated-femoral-strength-by-finite-element-analysis-of-dxa-scans-in-the-osteoporotic-fractures-in-men-mros-study
#16
L Yang, N Parimi, E S Orwoll, D M Black, J T Schousboe, R Eastell
Finite element model can estimate bone strength better than BMD. This study used such a model to determine its association with hip fracture risk and found that the strength estimate provided limited improvement over the hip BMDs in predicting femoral neck (FN) fracture risk only. INTRODUCTION: Bone fractures occur only when it is loaded beyond its ultimate strength. The goal of this study was to determine the association of femoral strength, as estimated by finite element (FE) analysis of DXA scans, with incident hip fracture as a single condition or with femoral neck (FN) and trochanter (TR) fractures separately in older men...
November 22, 2017: Osteoporosis International
https://www.readbyqxmd.com/read/29083360/management-and-treatment-of-femoral-neck-stress-fractures-in-recreational-runners-a-report-of-four-cases-and-review-of-the-literature
#17
Carlo Biz, Antonio Berizzi, Alberto Crimì, Chiara Marcato, Giulia Trovarelli, Pietro Ruggieri
Femoral neck stress fractures (FNSFs) in healthy young subjects are uncommon and most prevalent among long-distance runners and military recruits. Women seem to be at higher risk of developing stress fractures because of possible eating disorders followed by amenorrhea and osteoporosis. This case report describes four young and middle-aged, active female recreational runners who developed stress fractures of the femoral neck. In three of them, with a clinical history of persistent pain in the groin region, which worsened during training, early diagnosis by MRI was considered essential in detecting the fractures...
October 18, 2017: Acta Bio-medica: Atenei Parmensis
https://www.readbyqxmd.com/read/29038836/automated-dxa-based-finite-element-analysis-for-hip-fracture-risk-stratification-a-cross-sectional-study
#18
S Yang, W D Leslie, Y Luo, A L Goertzen, S Ahmed, L M Ward, I Delubac, L M Lix
Fracture risk indices (FRIs) generated from DXA-based finite element analysis were associated with hip fracture independent of FRAX score computed with femoral neck bone mineral density (BMD). Prospective studies are warranted to determine whether FRIs represent an improvement over BMD for predicting incident hip fractures. INTRODUCTION: The study aims to examine the association between prior hip fracture and FRIs derived from automated finite element analysis (FEA) of DXA hip scans. Femoral neck, intertrochanteric, and subtrochanteric FRIs were calculated as the von Mises stress induced by a sideways fall divided by the bone yield stress over the specified region of interest (ROI)...
January 2018: Osteoporosis International
https://www.readbyqxmd.com/read/28982480/location-of-atypical-femoral-fracture-can-be-determined-by-tensile-stress-distribution-influenced-by-femoral-bowing-and-neck-shaft-angle-a-ct-based-nonlinear-finite-element-analysis-model-for-the-assessment-of-femoral-shaft-loading-stress
#19
Yoto Oh, Koji Fujita, Yoshiaki Wakabayashi, Yoshiro Kurosa, Atsushi Okawa
INTRODUCTION: Loading stress due to individual variations in femoral morphology is thought to be strongly associated with the pathogenesis of atypical femoral fracture (AFF). In Japan, studies on AFF regarding pathogenesis in the mid-shaft are well-documented and a key factor in the injury is thought to be femoral shaft bowing deformity. Thus, we developed a CT-based finite element analysis (CT/FEA) model to assess distribution of loading stress in the femoral shaft. PATIENTS AND METHODS: A multicenter prospective study was performed at 12 hospitals in Japan from August 2015 to February 2017...
December 2017: Injury
https://www.readbyqxmd.com/read/28893491/micro-finite-element-method-to-assess-elastic-properties-of-trabecular-bone-at-micro-and-macroscopic-level
#20
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
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