1,117 results match your criteria Femoral Neck Stress Fracture


How to choose the suitable FNS specification in young patients with femoral neck fracture: A finite element analysis.

Injury 2021 May 29. Epub 2021 May 29.

The Second Affiliated Hospital of Guangzhou University of Traditional Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510006, China.

Background: Consensus regarding the optimal approach for the treatment of femoral neck fractures remains lacking. A new internal fixation femoral neck system (FNS) was developed and used in clinical practice. We aimed to investigate the biomechanical outcomes of different types of FNS in the treatment of unstable femoral neck fractures. Read More

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Tension-Sided Femoral Neck Stress Fracture in an Adolescent with Vitamin D Deficiency and Osteomalacia: A Case Report.

JBJS Case Connect 2021 06 15;11(2). Epub 2021 Jun 15.

Department of Pediatric Orthopaedics, Phoenix Children's Hospital, Phoenix, Arizona.

Case: An adolescent girl presented with groin pain without any history of trauma. Imaging showed a tension-sided stress fracture of the femoral neck. Vitamin D deficiency (VDD), and raised alkaline phosphatase and parathyroid hormone levels were found. Read More

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Finite element analysis of fixation effect for femoral neck fracture under different fixation configurations.

Comput Methods Biomech Biomed Engin 2021 Jun 7:1-8. Epub 2021 Jun 7.

Department of Orthopaedic Surgery, Yangpu District Shidong Hospital of Shanghai, Shanghai, China.

In this study, the biomechanical differences among three internal fixation configurations for treatment of Pauwels type II and III femoral neck fractures were analyzed. Using finite element analysis, the femur displacement and stress distributions of the internal fixation device and fracture section were obtained for different patients and movement conditions. The results show that patients with osteoporosis are more prone to femoral varus and femoral neck shortening, and the fracture probability of the device for these patients is higher than that for patients with normal bone. Read More

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Peri-implant atypical femoral fracture after nail or plate osteosynthesis.

J Orthop Sci 2021 May 27. Epub 2021 May 27.

Department of Orthopaedic Surgery, School of Medicine, Kyungpook National University, Kyungpook National University Hospital, 130 Dongduk-ro, Jung-gu, Daegu, 41944, Republic of Korea.

Background: A lack of scientific information regarding the risk factors and diagnosis of peri-implant atypical femoral fracture (PI-AFF) exists. We report a case series of developed PI-AFF with a nail or plate construct wherein prior femoral fractures were already healed after osteosynthesis. This study aimed to identify the cause and risk factors of PI-AFF and to devise a preventive method based on this. Read More

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Stress fracture of femoral stem of hip resurfacing a cause of sudden onset hip pain- A case report and review of literature.

J Clin Orthop Trauma 2021 Aug 13;19:50-52. Epub 2021 May 13.

Department of Orthopaedics, Pilgrim Hospital, United Lincolnshire Hospital NHS Trust, UK.

Resurfacing arthroplasty of the hip has had a difficult last decade. Fracture of the femoral neck has been a known complication of resurfaced hip replacement; however, fracture of the metal peg within the femoral component has only been reported twice. We encountered and treated a patient with a unique type of metal failure. Read More

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Strategies for managing the destruction of calcar femorale.

BMC Musculoskelet Disord 2021 May 19;22(1):460. Epub 2021 May 19.

Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, 610072, Sichuan Province, China.

Background: The calcar femorale was identified long ago. However, our current understanding of the calcar is insufficient, and its related concepts are sometimes confused. The calcar femoral is an important anatomical structure of the proximal femur, and its function can be overlooked. Read More

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Podosome-Driven Defect Development in Lamellar Bone under the Conditions of Senile Osteoporosis Observed at the Nanometer Scale.

ACS Biomater Sci Eng 2021 06 3;7(6):2255-2267. Epub 2021 May 3.

Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Str. 40, 01187 Dresden, Germany.

The degradation mechanism of human trabecular bone harvested from the central part of the femoral head of a patient with a fragility fracture of the femoral neck under conditions of senile osteoporosis was investigated by high-resolution electron microscopy. As evidenced by light microscopy, there is a disturbance of bone metabolism leading to severe and irreparable damages to the bone structure. These defects are evoked by osteoclasts and thus podosome activity. Read More

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Finite element analysis of femoral neck strains during stair ascent and descent.

Sci Rep 2021 Apr 28;11(1):9183. Epub 2021 Apr 28.

Department of Kinesiology, Iowa State University, Ames, IA, 50010, USA.

For older population, a better understanding of the hip joint loading environment is needed for the prevention of hip pain, and the reduction of the stress fractures and fall risks. Using the motion analysis and inverse dynamics methods, combined with musculoskeletal modelling, static optimization, and finite element (FE) femur model, the difference of femoral neck strains between stair ascent vs. descent, young vs. Read More

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Subcapital Femoral Neck Tension Stress Fracture - A Rare Injury in A Child: A Case Report.

Malays Orthop J 2021 Mar;15(1):132-134

Department of Orthopaedics and Traumatology, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia.

Femoral neck stress fractures are rare in children. To the best of our knowledge, the tension type stress fracture has been reported only twice in the English language literature. We report on a five years follow-up of a 10-year-old boy with this injury which was initially missed. Read More

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Bone mineral density and hip structure changes over one-year in collegiate distance runners and non-athlete controls.

Bone Rep 2021 Jun 23;14:101056. Epub 2021 Mar 23.

Human Performance Laboratory, Department of Health and Human Sciences, 1 LMU Drive, MS 8888, Los Angeles, CA 90045, USA.

Modification of bone is continuous throughout life and influenced by many factors, including physical activity. This study investigated changes in areal bone mineral density (aBMD) and hip structure among male and female collegiate distance runners and non-athlete controls over 12 months. Using dual-energy x-ray absorptiometry (DXA) and hip structure analysis (HSA) software, aBMD at the posterior-anterior (PA) and lateral spine, femoral neck, total hip (TH), whole body (WB), and bone geometry at the narrow neck (NN) of the femur was measured three times over 12 months. Read More

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Bilateral subtrochanteric stress riser fractures following percutaneous screw fixation of femoral neck stress fractures: a literature review and case report.

Eur J Orthop Surg Traumatol 2021 Mar 30. Epub 2021 Mar 30.

Department of Orthopaedics, Denver Health Medical Center, University of Colorado School of Medicine, 777 Bannock St, MC 0188, Denver, Colorado, 80204, USA.

Hip and groin pain in patients at-risk for femoral neck stress fracture demand a careful workup including advanced imaging in the setting of normal radiographs. A delay in diagnosis can lead to fracture displacement, which negatively impacts outcomes. Non-displaced tension-sided fractures and displaced fractures warrant operative fixation, while non-displaced compression-side fractures can be managed conservatively. Read More

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Femoral Neck Stress Fracture of a Male, Healthy Marathon Runner - Case Report and Literature Review.

Z Orthop Unfall 2021 Mar 29. Epub 2021 Mar 29.

Centrum für Muskuloskeletale Chirurgie, Charité University Hospital Berlin, Germany.

In the present report, a case of a healthy, 38-year-old male recreational marathon runner who presented in the emergency department is discussed. He was diagnosed with a stress fracture of the femoral neck and treated surgically using a dynamic hip screw (DHS). One year after surgery, the patient was able to return to most of his previous sports activities. Read More

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Finite Element Analysis of Femoral Neck Fracture Treated with Bidirectional Compression-Limited Sliding Screw.

Med Sci Monit 2021 Mar 30;27:e929163. Epub 2021 Mar 30.

Department of Anatomy, School of Basic Medical Science, Southern Medical University and Guangdong Provincial Key Laboratory of Medical Biomechanics and Academy of Orthopedics of Guangdong Province, Guangzhou, Guangdong, China (mainland).

BACKGROUND The rate of femoral neck shortening after internal fixation for femoral neck fracture is high and this complication reduces the function of the affected lower limb. The aim of this study was to design a bidirectional compression-limited sliding screw (BCLSC) that can achieve a full balance between retaining the sliding pressure of the ends of and maintaining the length of the femoral neck. MATERIAL AND METHODS We constructed a 3-dimensional model of a Pauwels III femoral neck fracture and models of 3 internal fixation methods (3 cannulated screws [3CS], dynamic hip screw [DHS]+CS, and BCLSC) by finite element analysis (FEA). Read More

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Miller Edwin Preston (1879-1928); pioneer of fracture biomechanics-a biographical vignette.

Int Orthop 2021 Mar 28. Epub 2021 Mar 28.

Department of Orthopaedics, First Faculty of Medicine, Charles University and Central Military Hospital Prague, Prague, Czech Republic.

Miller Edwin Preston (1879-1928) is cited in the literature in connection with the first angled implant for the fixation of fractures of the femoral neck. Further research has shown that this surgeon emphasised the principles of internal fixation and is the author of several extraordinary and still-valid concepts: "There is no branch of surgery in which nature is more exacting than bone work. To be successful in this field, the cases must be carefully selected, the most rigid asepsis should be observed, the surgeon must possess a good working knowledge of anatomy and fully appreciate the laws of stress, strain and leverage. Read More

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Positive or negative anteromedial cortical support of unstable pertrochanteric femoral fractures: A finite element analysis study.

Biomed Pharmacother 2021 Jun 25;138:111473. Epub 2021 Mar 25.

Department of Orthopaedics, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai 200072, China. Electronic address:

Objective: To explore the mechanical stability of unstable pertrochanteric fractures with proximal femoral nail anti-rotation (PFNA-Ⅱ) fixation under different anteromedial cortical support reduction patterns.

Methods: A 65-year-old healthy male volunteer with no history of hip or systemic disease was recruited. High-resolution computed tomography images with a slice thickness of 0. Read More

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A comparative mechanical study of two types of femur bone implant using the finite element method.

Int J Numer Method Biomed Eng 2021 Jun 12;37(6):e3459. Epub 2021 Apr 12.

Bone and Joint Diseases Research Center, Shiraz University of Medical Sciences, Shiraz, Iran.

The femoral bone fracture is one of the most common fractures that orthopedic surgeons deal with. These fractures are associated with a significant percentage of death due to non-orthopedic complications. For this reason, it is necessary that the surgeon be well-aware of the condition of the patient and also of the biomechanical conditions of the bone and implant before surgery, in order to use the best surgical technique. Read More

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Femoral Neck Stress Fractures in South Korean Male Military Recruits.

Clin Orthop Surg 2021 Mar 11;13(1):24-29. Epub 2020 Dec 11.

Department of Orthopaedic Surgery, Seoul Paik Hospital, Inje University College of Medicine, Seoul, Korea.

Backgroud: Femoral neck stress fractures (FNSFs) are rare but potentially disabling injuries if the diagnosis is missed or delayed and proper treatment is not provided. The aim of this study was to investigate and describe the characteristics and clinical course of FNSFs in South Korean male military recruits.

Methods: Between May 2015 and October 2019, 16 fractures in 12 young male military recruits were reviewed. Read More

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Comparison of time to healing and major complications after surgical fixation of nondisplaced femoral neck stress fractures: A systematic review.

Injury 2021 Apr 18;52(4):647-652. Epub 2021 Feb 18.

University Hospitals Cleveland Medical Center, Case Western Reserve University School of Medicine Department of Orthopaedic Trauma Surgery. 11100 Euclid Ave Cleveland, OH 44106. USA. Electronic address:

Introduction: There is no recent literature review comparing outcomes of fixation methods for nondisplaced stress fractures of the femoral neck.

Methods: A systematic review of the literature on operative fixation of femoral neck stress fractures was performed. Inclusion criteria consisted of diagnosis of nondisplaced femoral neck stress fractures, implants used for fixation, articles in English language or available English translation, all ages, and Level 1-5 evidence, documented time to healing, and incidence of complications. Read More

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[Comparison of effectiveness of two cannulated screw configurations in the treatment of femoral neck fractures in young adults].

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi 2021 Mar;35(3):318-322

Department of Orthopaedics, the First Affiliated Hospital of Bengbu Medical College, Anhui Key Laboratory of Tissue Transplantation, Bengbu Medical College, Bengbu Anhui, 233000, P.R.China.

Objective: To investigate and analyze the effectiveness of internal fixation with the two different cannulated screw implanting methods of rhomboid and inverted triangle in the treatment of femoral neck fracture in young adults.

Methods: The clinical data of 38 young adults with femoral neck fracture who met the selection criteria between January 2018 and August 2019 were retrospectively analyzed. According to the different methods of cannulated screw implanting, the patients were divided into two groups, 19 cases in each group. Read More

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Biomechanical study of different internal fixations in Pauwels type III femoral neck fracture - A finite elements analysis.

J Clin Orthop Trauma 2021 Mar 9;14:145-150. Epub 2020 Jun 9.

Hospital Regional do Gama, Brasília, Distrito Federal, Brazil.

Objective: To evaluate biomechanical behavior of different internal fixation methods for the treatment of Pauwels Type III femoral neck fractures.

Methods: Three internal fixators were developed to treat Pauwels Type III femoral neck fracture using finite elements: dynamic hip screw (DHS); DHS combined with anti-rotation screw; three cannulated screws in an inverted triangular configuration (ASNIS). Under the same conditions, vertical fracture displacement, and maximum and minimum principal, and Von Mises stresses were evaluated. Read More

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Atraumatic fractures of the femur.

Br J Radiol 2021 May 18;94(1121):20201457. Epub 2021 Mar 18.

Department of Musculoskeletal Radiology, Leeds Teaching Hospitals, Leeds, UK.

Atraumatic fractures of femur, although not as common as traumatic fractures, are frequently encountered in the clinical practice. They present with non-specific symptoms and can be occult on initial imaging making their diagnosis difficult, sometimes resulting in complications. Overlapping terminologies used to describe these fractures may hamper effective communication between the radiologist and the clinician. Read More

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Hip Injuries in the Adolescent Athlete.

Clin Sports Med 2021 Apr 5;40(2):385-398. Epub 2021 Feb 5.

Department of Orthopaedics, San Antonio Military Medical Center, 3851 Roger Brooke Drive, Fort Sam Houston, TX 78234, USA. Electronic address:

This article provides concise and up-to-date information on the most common hip pathologies that affect adolescent athletes. We cover the evaluation and treatment of avulsion injuries, stress fractures, slipped capital femoral epiphysis (SCFE), femoroacetabular impingement, developmental dysplasia of the hip, Legg-Calve-Perthes disease, and coxa saltans focusing on minimizing advanced imaging and using conservative therapy when applicable. Although this is not an all-encompassing list of disorders, it is key to understand these hip pathologies because these injuries occur commonly and can also have detrimental complications if not diagnosed and addressed early, especially SCFE and femoral neck stress fractures. Read More

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Stress Fractures of the Hip and Pelvis.

Authors:
Rebecca A Dutton

Clin Sports Med 2021 Apr 19;40(2):363-374. Epub 2021 Jan 19.

Department of Orthopaedics and Rehabilitation, University of New Mexico, MSC 10-5600, 1 University of New Mexico, Albuquerque, NM 87131, USA. Electronic address:

Stress fractures refer to overuse injuries of bone resulting from repetitive mechanical stress. Stress fractures of the hip and pelvic region, while relatively uncommon, have become increasingly recognized in certain populations, particularly long-distance runners and military recruits. The diagnosis of such injuries can be challenging, often hampered by a nonspecific physical examination and limited sensitivity of plain radiography. Read More

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Low Energy Availability Interferes With Exercise-Associated Bone Effects in Female Long-Distance Triathletes as Detected by HR-pQCT.

J Clin Densitom 2021 Jan 30. Epub 2021 Jan 30.

Division of Endocrinology, Clementino Fraga Filho University Hospital, Federal University of Rio de Janeiro (HUCFF-UFRJ), Rio de Janeiro, Rio de Janeiro, Brasil.

Female Athlete Triad, initially described as the association of disordered eating, amenorrhea and osteoporosis, was further redefined to focus on low energy availability (EA), which has a central role in development of hypoestrogenism and low bone mineral density (BMD). However, the contribution of each variable, that is, low EA and hypoestrogenism, for bone derangements is still an open question. To evaluate body composition and bone status in long-distance triathletes without hypoestrogenism, as compared to non-athletes, using DXA and HR-pQCT, and the influence of EA. Read More

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January 2021

Alterations in femoral neck strength following pelvic irradiation. A finite element analysis of simulated eccentric forces using bone density data derived from CT.

Bone 2021 Apr 26;145:115865. Epub 2021 Jan 26.

Dept. of Radiation Oncology, Complejo Hospitalario Universitario de Albacete, Spain. Electronic address:

Background And Purpose: Radiotherapy is known to produce long-term skeletal complications. We aim to evaluate the biomechanical effect on femoral neck bone from hypothetical eccentric loads on pre- and post-radiotherapy CT-images for patients treated for rectal cancer.

Material And Methods: Pre- and post-radiotherapy CT-images of rectal cancer from 10 patients were selected randomly. Read More

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Measuring femoral neck loads in healthy young and older adults during stair ascent and descent.

PLoS One 2021 26;16(1):e0245658. Epub 2021 Jan 26.

Department of Kinesiology, Iowa State University, Ames, IA, United States of America.

Understanding the hip loading environment for daily activities is useful for hip fracture prevention, rehabilitation, and the design of osteogenic exercises. Seventeen older adults (50-70 yrs) and twenty young adults (18-30 yrs) were recruited. A rigid body model combined with a musculoskeletal model was used to estimate lower extremity loading. Read More

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Synovial Inclusion Cyst Mimicking a Femoral Neck Stress Fracture in an Active Duty Servicemember: A Case Report.

JBJS Case Connect 2021 Jan 14;11(1):e20.00571. Epub 2021 Jan 14.

Department of Orthopedics, Brooke Army Medical Center, San Antonio, Texas.

Case: A 19-year-old female servicemember with history of ischiopubic rami stress fractures was referred to orthopaedic surgery for magnetic resonance imaging findings concerning for a tension-sided femoral neck stress fracture. However, her history and symptoms were discordant with the diagnosis of stress fracture. The patient was managed with protected weight-bearing for 6 weeks with gradual return to physical activity. Read More

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January 2021

Bilateral Atypical Tension-sided Femoral Neck Stress Fractures in a Military Recruit.

Mil Med 2021 Jan 12. Epub 2021 Jan 12.

Department of Orthopaedic Surgery, Naval Medical Center San Diego, San Diego, CA 92134, USA.

A case report of a Marine Recruit with bilateral atypical tensile-sided femoral neck stress fracture. The patient was treated nonoperatively with protected weightbearing following an established protocol that included close observation with serial exams and advanced imaging. He recovered uneventfully and was able to return to running. Read More

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January 2021

Outcomes for Pauwels' Osteotomy in Nonunions of Displaced Femoral Neck Stress Fractures: A Case Series.

J Surg Orthop Adv 2020 ;29(4):234-239

Department of Orthopaedic Surgery, Naval Medical Center San Diego, San Diego, California.

Femoral neck stress fractures (FNSF) are rare injuries and have shown poor results after displacement, including nonunion and osteonecrosis (ON). The goal of this study was to retrospectively evaluate a series of patients who underwent a valgus producing intertrochanteric osteotomy for FNSF nonunion and assess the degree of Pauwels' correction, ON rate, and return to duty. Current functional outcomes were prospectively obtained via a telephone script. Read More

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January 2021

New fixation method for Pauwels type III femoral neck fracture: a finite element analysis of sliding hip screw, L-shaped, and L-shaped with medial plate.

Eur J Orthop Surg Traumatol 2021 Jan 3. Epub 2021 Jan 3.

Orthopedics and Traumatology Service, Nova Monteiro - Miguel Couto Municipal Hospital, Rio de Janeiro, Brazil.

Objective: In this study, we aimed to evaluate the biomechanical behavior of three fixations for Pauwels type III fractures (sliding hip screw (SHS), L-shaped, and L-shaped with medial plate), by finite element analysis (FEM).

Methods: Three internal fixators were developed to treat Pauwels type III fracture by finite elements: SHS; L-shaped; and L-shaped with medial plate. Under the same conditions, localized and total vertical fracture displacement, maximum and minimum principal and von Mises stresses were evaluated. Read More

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January 2021