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Femoral Neck Stress Fracture

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541. Calcium phosphate crystal distribution in the superficial zone of human femoral head articular cartilage. Full Text available with Trip Pro

Calcium phosphate crystal distribution in the superficial zone of human femoral head articular cartilage. The distribution of cuboid crystals in articular cartilage was examined by image analysis of electron micrographs. The specimens were considered to be functionally normal articular cartilage from femoral heads resected either because of femoral neck fracture or tumour in the distal femur. The study was restricted to the superficial region between 0 and 50 microns depth. Crystals were (...) mechanical stress.

1992 Journal of anatomy

542. A randomized trial of sodium fluoride (60 mg) +/- estrogen in postmenopausal osteoporotic vertebral fractures: increased vertebral fractures and peripheral bone loss with sodium fluoride; concurrent estrogen prevents peripheral loss, but not vertebral fra (Abstract)

-treated groups. Complete nonvertebral fractures did not occur in the two +E groups; there were no differences between groups F CaD and CaD. Baseline BMD (spine and femoral neck) was related to incident vertebral fractures in the control groups (no NaF), but not in the two NaF groups. Our results and a literature review indicate that fluoride salts, if used, should be at low dosage, with pretreatment and co-treatment with a bone resorption inhibitor. (...) . Peripheral bone loss occurred at most sites in the F CaD group at 27 months: tibia/fibula shaft -7.3% (p = 0.005); femoral shaft -7.1% (p = 0.004); distal forearm -4.0% (p=0.004); total hip -4.1% (p = 0.003); and femoral neck -3.5% (p = 0.006). No significant loss occurred in group FE CaD. Differences between the two NaF groups were greatest at the total hip at 27 months but were not significant [p < 0.05; in view of the multiple bone mineral density (BMD) sites, an alpha of 0.01 was employed to denote

2002 Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA Controlled trial quality: uncertain

543. Proximal femoral bone mineral density after resurfacing total hip arthroplasty and after standard stem-type cementless total hip arthroplasty, both having similar neck preservation and the same articulation type. (Abstract)

Proximal femoral bone mineral density after resurfacing total hip arthroplasty and after standard stem-type cementless total hip arthroplasty, both having similar neck preservation and the same articulation type. To examine whether the Freeman cementless total hip arthroplasty (THA), with femoral neck preservation and a large metal head, can prevent stress shielding in a manner similar to resurfacing THA, we compared femoral bone mineral density (BMD) change in 10 resurfacing THA patients (...) , although it may prevent some major complications after resurfacing THA such as neck fracture and avascular necrosis of the femoral head.

2007 Journal of Arthroplasty

544. New QCT analysis approach shows the importance of fall orientation on femoral neck strength. (Abstract)

New QCT analysis approach shows the importance of fall orientation on femoral neck strength. The influence of fall orientation on femur strength has important implications for understanding hip fracture risk. A new image analysis technique showed that the strength of the femoral neck in 37 males varied significantly along the neck axis and that bending strength varied by a factor of up to 2.8 for different loading directions.Osteoporosis is associated with decreased BMD and increased hip (...) fracture risk, but it is unclear whether specific osteoporotic changes in the proximal femur lead to a more vulnerable overall structure. Nonhomogeneous beam theory, which is used to determine the mechanical response of composite structures to applied loads, can be used along with QCT to estimate the resistance of the femoral neck to axial forces and bending moments.The bending moment [My(theta)] sufficient to induce yielding within femoral neck sections was estimated for a range of bending

2005 Journal of Bone and Mineral Research

545. Femoral neck trabecular microstructure in ovariectomized ewes treated with calcitonin: MRI microscopic evaluation. Full Text available with Trip Pro

improved all the Tb structural parameters to the Sham level (p < 0.0001 approximately p = 0.0281), whereas 50 IU significantly increased the Tb number and the mean length of the Tb branches. BV/TV explained 74% of the variation of compressive stress of the trabecular cylinder cores of the femoral neck. Combining all structural parameters in a multivariate regression analysis significantly improved the explanation to 84%, and adding BMD further improved the predictive ability of the model to 92%. We (...) conclude that OVX induces deterioration of the MRI-derived Tb microstructure in the femoral neck of ewes. sCT treatment prevents OVX-induced changes. The femoral neck microarchitecture significantly correlates with its biomechanical properties. Combining microstructural parameters with BMD further improves the prediction of bone biomechanical properties. The effects of sCT on OVX ewes may help explain reduced fracture risk in postmenopausal osteoporotic women treated with sCT.

2005 Journal of Bone and Mineral Research

546. Subchondral fatigue fracture of the femoral head in military recruits. (Abstract)

Subchondral fatigue fracture of the femoral head in military recruits. Subchondral stress fracture of the femoral head is a rare condition that usually occurs as an insufficiency fracture in people with poor bone quality. We evaluated the clinical characteristics of subchondral fatigue fractures of the femoral head that occurred in young, healthy military recruits.Between January 1998 and November 2001, seven subchondral fatigue fractures of the femoral head were treated in five patients (...) , and all of them showed increased radionuclide uptake in the femoral head. In all affected hips, magnetic resonance images demonstrated a localized or diffuse bone-marrow-edema pattern in the femoral head and/or neck. A subchondral fracture line (a magnetic resonance crescent sign) was identified in all hips. In the patients who did not have collapse of the femoral head, the pain decreased gradually and disappeared completely within six months, with correspondingly improved findings on sequential

2004 The Journal of Bone and Joint Surgery. American Volume

547. Femoral Fractures

Guidelines. You may find the article more useful, or one of our other . In this article In This Article Femoral Fractures In this article Fractures of the femur are common. They may affect the neck, shaft or distal (supracondylar) femur. They include: Fractures of the femoral neck - far more common in the elderly. Fractures of the femoral shaft and supracondylar fractures - usually caused by violent trauma and most often occur in adolescents and young adults. Femoral stress fractures - partial-thickness (...) fractures, most commonly affecting the femoral neck. They are chronic overuse injuries and tend to be seen in those who take part in physical activity. They may progress to full fractures. They are covered more fully in the separate article. Hip fractures A hip fracture means a fracture of the proximal femur (proximal to 5 cm below the lesser trochanter). Hip fractures are the most common reason for admission to an orthopaedic trauma ward. [ ] Intracapsular fractures Involve the femoral neck between

2008 Mentor

548. Management and return to play of stress fractures. (Abstract)

. High-risk stress fractures occur in the superolateral femoral neck, anterior tibial shaft, tarsal navicular, proximal fifth metatarsal, and talar neck. Low-risk stress fractures occur in the lateral malleolus, calcaneus, 2nd through 4th metatarsals, and the femoral shaft.The undertreatment of high-risk stress fractures can lead to catastrophic bone failure and/or prolonged loss of playing time. Overtreatment of low-risk stress fractures can result in unnecessary deconditioning and unneeded loss (...) Management and return to play of stress fractures. The purpose of this article is to provide the clinician an evidence/experience-based algorithm for the management of stress fractures.Medline search of peer reviewed publications regarding stress fracture etiology, classification, treatment, and natural history.The algorithm was developed from a review of retrospective case series, a few evidence-based papers, and the clinical experience of 4 sports medicine team physicians with a combined

2005 Clinical Journal of Sport Medicine

549. Relation between age, femoral neck cortical stability, and hip fracture risk. (Abstract)

to transmit much mechanical load to this region. We aimed to measure whether elastic instability increases greatly with age since it might trigger hip fracture in a sideways fall.We measured with computed tomography the distribution of bone in the mid-femoral neck of 77 proximal femurs from people who died suddenly aged 20-95 years. We then calculated the critical stress, from the geometric properties and density of the cortical zone most highly loaded in a sideways fall, as a threshold for elastic (...) Relation between age, femoral neck cortical stability, and hip fracture risk. Hip fracture risk rises 100 to 1000-fold over 60 years of ageing. Loss of resistance to bending is not a major feature of normal ageing of the femoral neck. Another cause of fragility is local buckling or elastic instability. Bones adapt to their local experience of mechanical loading. The suggestion that bipedalism allows thinning of the underloaded superolateral femoral neck cortex arises from the failure of walking

2005 Lancet

550. Exercise and oral contraceptive use suppress the normal age-related increase in bone mass and strength of the femoral neck in women 18-31 years of age. (Abstract)

Exercise and oral contraceptive use suppress the normal age-related increase in bone mass and strength of the femoral neck in women 18-31 years of age. Women who exercise during their second and third decades may increase their peak bone mass and lower their eventual risk for postmenopausal fracture. However, the effects of exercise in younger women can be modulated by the use of oral contraceptives, which may prevent the normal accretion of bone mass that would otherwise occur. We hypothesized (...) sessions/week of aerobic and nonaerobic exercises, and continued for 2 years. Each 6 months, the femoral neck of each subject was scanned using a Lunar dual-energy X-ray absorptiometry (DEXA) scanner, and bone mineral content, density and geometric information were used to calculate estimated stresses and bending rigidity at the hip. Percent changes from baseline were analyzed using two-way analysis of variance (ANOVA) at 6, 12, 18, and 24 months. Women who neither exercised nor took oral

2000 Bone Controlled trial quality: uncertain

551. Stress fractures of the femoral shaft in women's college lacrosse: a report of seven cases and a review of the literature. Full Text available with Trip Pro

Stress fractures of the femoral shaft in women's college lacrosse: a report of seven cases and a review of the literature. Stress fractures do not often occur in the shaft of the femur. They are more common in the femoral neck, the tibial shaft, the metatarsals, and other bones of the foot. In female athletes, stress fractures classically afflict the distance runner, the ballerina, the gymnast, and the figure skater.To describe the clinical presentation, diagnosis, treatment, and outcome (...) of seven college female lacrosse players with femoral shaft stress fractures, and review the literature.The unusual results of this study support the principle that clinical suspicion should be high when treating any female athlete regardless of the sport. In this case series, an abrupt change in the quality of the running surface during the competitive training season was the only underlying common thread among the athletes.The findings suggest that risk factors for the female athlete are variable

2005 British Journal of Sports Medicine

552. Stress fracture of the femoral neck as a complication of total knee arthroplasty. (Abstract)

Stress fracture of the femoral neck as a complication of total knee arthroplasty. Stress fracture of the hip is a rare complication of total knee arthroplasty that occurs most often in patients in whom a significant deformity of the knee has been corrected, particularly those with poor mobility before surgery. We report 4 cases of ipsilateral fracture of the femoral neck after total knee arthroplasty.

2005 Journal of Arthroplasty

553. Musculoskeletal images. Bilateral insufficiency fracture of the femoral neck Full Text available with Trip Pro

0372715 0008-428X IM Femoral Neck Fractures diagnosis Fractures, Stress diagnosis Humans Magnetic Resonance Imaging Male Middle Aged 2001 2 28 10 0 2001 3 27 10 1 2001 2 28 10 0 ppublish 11220790 PMC3695174 (...) Musculoskeletal images. Bilateral insufficiency fracture of the femoral neck 11220790 2001 03 22 2013 07 10 0008-428X 44 1 2001 Feb Canadian journal of surgery. Journal canadien de chirurgie Can J Surg Musculoskeletal images. Bilateral insufficiency fracture of the femoral neck. 11-2 Pearce D H DH Joint Department of Medical Imaging, Mount Sinai Hospital and the University Health Network, University of Toronto, Ont. White L M LM Bell R S RS eng Case Reports Journal Article Canada Can J Surg

2001 Canadian Journal of Surgery

554. A pathological fracture of the femoral neck associated with osteonecrosis of the femoral head and a stress fracture of the contralateral femoral neck. (Abstract)

A pathological fracture of the femoral neck associated with osteonecrosis of the femoral head and a stress fracture of the contralateral femoral neck. A pathological fracture of the right femoral neck associated with osteonecrosis of the right femoral head and a stress fracture of the contralateral femoral neck occurred in a 47-year-old man. Osteonecrosis was noted in almost the entire femoral head, and the pathological fracture occurred at the subcapital area. Six months later, a stress (...) fracture was detected in the contralateral femoral neck. The stress fracture of the left femoral neck might have been caused by the incremental repetitive mechanical loading in the left hip as a result of the pathological fracture in the right hip. Therefore, it might be necessary to conduct a careful examination, using either a magnetic resonance imaging scan or a bone scan, of patients with extensive osteonecrosis of the femoral head because of the risk of osteonecrosis in the contralateral femoral

2005 Journal of Arthroplasty

555. Displaced stress fracture of the femoral neck in an active amenorrhoeic adolescent. Full Text available with Trip Pro

Displaced stress fracture of the femoral neck in an active amenorrhoeic adolescent. Female athletes in endurance sports are at risk of osteoporosis which predisposes them to femoral neck stress fractures. These require early diagnosis and treatment to avoid catastrophic consequences.

1997 British Journal of Sports Medicine

556. Femoral neck stress fracture: the importance of clinical suspicion and early review Full Text available with Trip Pro

Femoral neck stress fracture: the importance of clinical suspicion and early review Stress fracture of the femoral neck is rare and often initially missed. A high index of clinical suspicion is required in athletes presenting with a history of insidious onset, exertional groin pain and pain at the extremes of hip motion on examination. Regular review is recommended to prevent progression of the stress fracture to a displaced fracture, as this significantly worsens long term outcome.

2002 British Journal of Sports Medicine

557. Stress fracture of the femoral neck in a marathon runner. Full Text available with Trip Pro

Stress fracture of the femoral neck in a marathon runner. 6722426 1984 07 17 2018 11 13 0306-3674 18 1 1984 Mar British journal of sports medicine Br J Sports Med Stress fracture of the femoral neck in a marathon runner. 42-3 Baer S S Shakespeare D D eng Case Reports Journal Article England Br J Sports Med 0432520 0306-3674 IM Adult Femoral Neck Fractures diagnostic imaging etiology surgery Fracture Fixation, Internal Humans Male Radiography Running Stress, Physiological complications 1984 3 1

1984 British Journal of Sports Medicine

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