Relevant bibliographies by topics / Femoral neck stress fractures

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Femoral neck stress fractures'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Femoral neck stress fractures"

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Joshi, Amit, B. R. KC, B. C. Shah, P. Chand, B. B. Thapa, and N. Kayastha. "Femoral Neck Stress Fractures in Military Personnel." Journal of Nepal Medical Association 48, no. 174 (April 1, 2009): 99–102. http://dx.doi.org/10.31729/jnma.176.

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Introduction: Stress fractures are common during military training but femoral neck stress fractures are uncommon and sometimes pose diagnostic and therapeutic challenges. An incomplete stress fracture with excellent prognosis, if left unprotected, can lead to displaced femoral neck fracture with almost 63% complication rate even with best of the treatment. The aim of this study was to analyze various aspects of the femoral neck stress fracture so that early diagnosis can be made to prevent devastating complications like osteonecrosis and non-union. Methods: The four year army hospital record of 16 patients with femoral neck stress fracture were studied. Their demographic profi le, type of fracture, presentation delay, on set of clinical symptoms and complication of femoral neck stress fracture were critically analyzed. Results: The mean age of the patient was 19.94 years. Total 74% of them developed fi rst symptoms of stress fracture between four to seven weeks of training. There was 3.4 weeks delay from the clinical onset of symptoms to the diagnosis of stress fracture. The type of femoral neck stress fracture were compression (31.25%), tension (18.75%) and displaced (50%). Out of eight displaced type of fractures, 5 (62.5%) had developed complications (3 osteonecrosis and 2 nonunion).Conclusions: Femoral neck stress fracture occurs in initial four to seven weeks of training. The high index of suspicion in initial period of training can help to detect and decreases significant morbidity.Key Words: displaced stress fractures, non-union, osteonecrosis, recruits
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Fullerton, LeRoy R. "Femoral Neck Stress Fractures." Sports Medicine 9, no. 3 (March 1990): 192–97. http://dx.doi.org/10.2165/00007256-199009030-00006.

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Cloutier, Dagan. "Femoral Neck Stress Fractures." JBJS Journal of Orthopaedics for Physician Assistants 2, no. 1 (2014): 24–27. http://dx.doi.org/10.2106/jbjs.jopa.15.00032.

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Maffulli, Nicola, Umile Giuseppe Longo, and Vincenzo Denaro. "Femoral Neck Stress Fractures." Operative Techniques in Sports Medicine 17, no. 2 (April 2009): 90–93. http://dx.doi.org/10.1053/j.otsm.2009.06.001.

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Harris, Joshua David, and Jaskarndip Chahal. "Femoral Neck Stress Fractures." Operative Techniques in Sports Medicine 23, no. 3 (September 2015): 241–47. http://dx.doi.org/10.1053/j.otsm.2015.07.001.

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Steele, Clarence E., Grant Cochran, Christopher Renninger, Bradley Deafenbaugh, and Kevin M. Kuhn. "Femoral Neck Stress Fractures." Journal of Bone and Joint Surgery 100, no. 17 (September 2018): 1496–502. http://dx.doi.org/10.2106/jbjs.17.01593.

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Fullerton, LeRoy R., and Harry A. Snowdy. "Femoral neck stress fractures." American Journal of Sports Medicine 16, no. 4 (July 1988): 365–77. http://dx.doi.org/10.1177/036354658801600411.

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Morinaga, Sei, Kenichi Ueshima, Yoshinobu Maruhashi, Noriyuki Hashimoto, Shoji Watanabe, and Takuya Nakamura. "Bilateral Stress Fractures of the Femoral Neck after Total Knee Arthroplasty: Importance of Early Diagnosis." Case Reports in Orthopedics 2020 (February 6, 2020): 1–4. http://dx.doi.org/10.1155/2020/3091693.

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Unilateral stress fracture of the femoral neck following total knee arthroplasty (TKA) is a rare complication; only 21 cases are described in English literature so far. Bilateral stress fractures of the femoral neck occurring simultaneously following a bilateral TKA have been seen in only 2 cases till now. We report a patient suffering from rheumatoid arthritis of both knees, who was treated with bilateral TKA. She developed spontaneous fractures of the femoral neck on both sides 12 months following the TKA. She was treated with bilateral total hip arthroplasty (THA). Stress fracture of the femoral neck should be suspected in patients complaining of hip pain who have undergone TKA.
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Sledge, John B. "Management of Femoral Neck Stress Fractures." Operative Techniques in Sports Medicine 14, no. 4 (October 2006): 265–69. http://dx.doi.org/10.1053/j.otsm.2006.10.002.

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Long, Margaret M., and Deborah M. Stetts. "Stress Fractures of the Femoral Neck." Orthopaedic Nursing 4, no. 3 (May 1985): 69–71. http://dx.doi.org/10.1097/00006416-198505000-00014.

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Dissertations / Theses on the topic "Femoral neck stress fractures"

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Korvala, J. (Johanna). "In quest of genetic susceptibility to disorders manifesting in fractures:assessing the significance of genetic factors in femoral neck stress fractures and childhood non-OI primary osteoporosis." Doctoral thesis, Oulun yliopisto, 2012. http://urn.fi/urn:isbn:9789514298295.

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Abstract Osteoporosis is a bone disorder that leads to a reduction in bone volume, deterioration of bone microarchitecture and therefore increased fracture risk. Bone disorders such as osteoporosis commonly have both genetic and environmental components. Family and twin studies have shown the importance of genetics in bone formation and health, but most of the genetic factors contributing to bone formation are still largely unknown. The aim of this thesis was to search for and identify genetic factors that predispose to two different bone disorders manifesting in fractures, namely femoral neck stress fractures and childhood primary osteoporosis without features of OI (i.e. non-OI primary osteoporosis). Furthermore, in vitro studies were performed to elucidate the importance and mechanism of action of identified genetic factors in non-OI primary osteoporosis. By using candidate gene analyses we identified predisposing alleles, haplotypes and their interactions that increased the risk for femoral neck stress fractures in young male military conscripts. The conscripts lacking the CTR C allele and/or VDR C-A haplotype had a three-fold increased risk for femoral neck stress fractures compared to the carriers of both. Furthermore, conscripts carrying the LRP5 A-G-G-C haplotype had a three-fold increased risk for femoral neck stress fractures and in combination with VDR C-A haplotype a four-fold increased risk for stress fractures. These associations were mediated by low body weight and BMI. In the search for genetic factors of non-OI primary osteoporosis in children and adolescent, two novel mutations in LRP5 and two more variants in WNT3A and DKK1 were found in patients. The variants were also observed in the affected family members, but not in the control group. The effects of these variants were examined in in vitro studies and the results showed that some LRP5 mutations and the WNT3A variant might reduce bone formation by decreasing the canonical Wnt signalling activity
Tiivistelmä Osteoporoosi on luustosairaus, joka alentaa luuntiheyttä ja heikentää luun rakennetta ja siten lisää murtumien riskiä. Osteoporoosin kaltaiset luusairaudet ovat usein monitekijäisiä tauteja, joiden syntyyn vaikuttavat sekä perinnölliset että ympäristölliset tekijät. Perhe- ja kaksostutkimukset ovat osoittaneet perinnöllisten tekijöiden olevan tärkeitä luun muodostuksessa ja terveydessä, mutta nämä tekijät ovat kuitenkin vielä suurelta osin tuntemattomia. Tutkimustyön tavoitteena oli etsiä ja tunnistaa perinnöllisiä tekijöitä, jotka altistavat kahdelle luunmurtumina ilmenevälle sairaudelle: reisiluunkaulan rasitusmurtumille ja lasten primaariselle osteoporoosille. Lisäksi primaariselle osteoporoosille altistavien perinnöllisten tekijöiden merkitystä ja vaikutusmekanismeja tutkittiin in vitro- kokeilla. Reisiluunkaulan rasitusmurtumille altistavien alleelien, haplotyyppien ja näiden vuorovaikutusten tunnistamiseen käytettiin ehdokasgeenianalyysiä nuorten alokkaiden aineistossa. Potilailla, joilta CTR-geenin C-alleeli ja/tai VDR-geenin C-A haplotyyppi puuttuivat, oli kolminkertainen riski rasitusmurtumien syntyyn molempien geenimuotojen kantajiin verrattuna. Myös LRP5-geenin A-G-G-C haplotyypin kantajilla oli kolminkertainen riski rasitusmurtumiin ja VDR-geenin C-A haplotyyppi ja A-G-G-C yhdessä lähes nelinkertaistivat rasitusmurtumien riskin alokkailla. Näiden assosiaatioiden todettiin välittyvän alhaisen painon ja painoindeksin välityksellä. Lapsuudessa tai varhaisnuoruudessa puhkeavan primaarisen osteoporoosin perinnöllisten tekijöiden etsinnässä löydettiin kaksi uutta mutaatiota LRP5-geenistä ja yhteensä kaksi uutta muutosta WNT3A- ja DKK1-geeneistä. Uusien ehdokasgeenilöydösten osuutta primaarisen osteoporoosin syntyyn tukee se, että muutokset löydettiin potilaiden lisäksi heidän sairailta sukulaisiltaan eikä muutoksia havaittu kontrolliaineistoissa. Uusien mutaatioiden mahdollisia vaikutuksia tutkittiin in vitro-kokein, jotka osoittivat, että eräät LRP5-geenin mutaatiot ja WNT3A-geenin muutos alentavat kanonisen Wnt-signalointireitin aktiivisuutta ja voivat siten vähentää luunmuodostusta
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Tidermark, Jan. "Quality of life and femoral neck fractures /." Stockholm, 2002. http://diss.kib.ki.se/2002/91-7349-322-8/.

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Frihagen, Frede. "On the diagnosis and treatment of femoral neck fractures /." [London] : Informa Healthcare, 2009. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=017694718&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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Enocson, Anders. "Dislocation of hip arthroplasty in patients with femoral neck fractures." Stockholm, 2009. http://diss.kib.ki.se/2009/978-91-7409-642-2/.

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Neander, Gustaf. "Displaced femoral neck fractures : studies on osteosynthesis and total hip arthroplasty /." Stockholm, 2000. http://diss.kib.ki.se/2000/91-628-4167-X/.

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Spangler, Leslie. "Biomechanical factors and failure of transcervical hip fracture repair /." Thesis, Connect to this title online; UW restricted, 1999. http://hdl.handle.net/1773/10858.

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Johansson, Torsten. "Displaced Femoral Neck Fractures : A prospective randomized study of clinical outcome, nutrition and costs." Doctoral thesis, Linköping : Univ, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-5233.

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Blomfeldt, Richard. "Surgical treatment of patients with displaced femoral neck fractures : aspects on outcome and selection criteria /." Stockholm, 2006. http://diss.kib.ki.se/2006/91-7140-801-0/.

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Mukka, Sebastian. "Aspects on treatment of femoral neck fractures : studies on treatment methods, surgical approach and external validity." Doctoral thesis, Umeå universitet, Ortopedi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-108269.

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Femoral neck fracture (FNF) is a great challenge for today´s health care and is associated with high mortality and morbidity in the elderly.  In the short term several studies in the literature have demonstrated improved hip function, quality of life and fewer re-operations in elderly patients treated with total hip arthroplasty (THA) instead of internal fixation (IF). There are few reports on the long-term outcome comparing IF and THA. The vast majority of orthopaedic departments in Sweden use the direct lateral (DL) or posteriolateral (PL) approaches for hip arthroplasty. The PL approach has been linked to an increased risk of dislocation of the prosthesis and a higher rate of revision surgery in comparison to the DL approach. There are few reports focusing on radiological risk factors for prosthetic dislocation and patient reported hip function comparing the two surgical approaches for hip arthroplasty in FNF. The randomized controlled trial (RCT) is the gold standard for evaluating medical or surgical interventions. An RCT of high quality has to be internally and externally valid. Internal validity refers to a correct study design to avoid bias skewing the results. External validity (EV) refers to whether the results will be clinically relevant to a definable group of patients and can be extrapolated to the general health care situation. There are only a few reports in the orthopaedic literature focusing on the EV of published studies and none in the field of hip fractures. Study I: This is a RCT of 100 patients with a displaced FNF comparing THA and IF. Follow-up evaluations were performed at three months and 1, 2, 4, 11 and 17 years. It was found that the Harris hip score (HHS) was higher and the rate of reoperations lower for patients treated with THA. Study II: This is a prospective cohort study of 185 hips, comparing the DL and the PL approaches in patients treated with a hemiarthroplasty (HA) for a displaced FNF. Follow-up was after 1 year. There was no difference in patient reported outcome between the groups measured with the HHS and WOMAC index. The PL approach resulted in a higher re-operation rate while the DL approach in a higher incidence of limping. Study III: This is a retrospective cohort study of 373 patients with a cemented bipolar HA using a PL approach for a FNF with a follow-up ranging from 6 months to 7 years. Radiographs and all surgical records were reviewed regarding femoral offset (FO), leg length discrepancy (LLD) and Wiberg angle. Patients with recurrent dislocations had a decreased postoperative FO, LLD and shallower acetabulum on the operated side compared with their controls. Study IV: This is a prospective cohort study of 840 hips comparing patients included in a RCT with those that did not give their informed consent (NC) or did not fulfill the criteria for participating in the trial (MS). Patients in the NC and MS groups had an increased mortality rate in comparison to those included in the study. We did not find any differences in hip function between these groups. The main conclusions of this thesis are: Healthy and lucid elderly patients with good hip function preoperatively, should be treated with THA for a displaced FNF. The DL approach is favourable in treating displaced FNF with HA due to its decreased risk of reoperation but with an identical hip function outcome as the PL approach. Care should be taken to restore the LLD and FO otherwise this may increase the risk of recurrent dislocation of a HA. Our findings suggest that trial participants had a lower mortality rate than non-participants but the functional outcome of non-participants appeared to be satisfactory. This is important to take into consideration when extrapolating study results to a health care system.
Lårbenshalsfrakturer (FNF) är en utmaning för dagens sjukvård och förknippad med hög mortalitet i den äldre befolkningen. FNF orsakas främst av lågenergitrauma efter fall i samma plan hos patienter med benskörhet. Total höftledsprotes (THA) har visat sig ge en bättre höftfunktion, livskvalitet med färre omoperationer hos äldre patienter än sluten reposition samt fixering med skruvar (IF) under de första två-fyra åren efter operation. Få studier har publicerats med långtidsuppföljning av THA jämfört med IF. Vid behandling av felställd FNF med halv höftledsplastik (HA) eller THA finns olika kirurgiska metoder (snittföring) för implantation av protesen. Majoriteten av ortopedkliniker i Sverige använder direkt lateral (DL) eller posteriolateral (PL) snittföring. PL har kopplats till en ökad risk för luxation av protesen (urledsvridning), vilket i sin tur genererat en högre risk för omoperation jämfört med DL. Få studier har utvärderat höftfunktion med avseende på snittföring. Detsamma gäller vilka radiologiska faktorer som påverkar risken förprotesluxation. Det finns olika typer av studiedesigner för utvärdering av medicinska och kirurgiska behandlingsmetoder. Studiedesignen med högst bevisvärde anses vara den randomiserade kontrollerade studien (RCT). För att en RCT skall hålla hög kvalitet krävs intern och extern validitet. Intern validitet syftar på ett korrekt studieupplägg som mäter det som avses och undviker påverkan av icke önskvärda faktorer. Extern validitet (EV) innebär att erhållna resultat från studien är generaliserbara och kan extrapoleras till andra grupper än den studerade. Det inga rapporter i ortopediska litteraturen med fokus på EV med patienter som drabbats av FNF. Studie I: Prospektiv randomiserad studie av 100 patienter med en felställd FNF jämförs THA med IF med avseende på höftfunktion och reoperationer. Uppföljning gjordes efter tre månader samt 1, 2, 4, 11 och 17 år. HHS som mått på höftfunktion var högre och andelen reoperationer lägre för patienter som behandlades med THA. Studie II: Prospektiv kohortstudie med 183 patienter med felställd FNF behandlade med HA och antingen DL eller PL. Vi fann ingen skillnad i patientrapporterad höftfunktion utvärderat med HHS och WOMAC efter 1 år men en ökad förekomst av hälta vid DL. Studie III: Retrospektiv kohortstudie av 373 patienter opererade med en cementerad bipolär HA och PL. Postoperativa röntgenbilder granskades avseende femoral offset (FO), postoperativ benlägdsskillnad (LLD) samt acetabulär Wibergvinkel och relaterades till återkommande protesluxationer. Detta relaterades till återkommande luxationer. Uppföljningstiden varierade mellan 6 månader och 7 år. Patienter med återkommande luxationer hade en minskad postoperativ global FO, förkortad LLD och grundare acetabulum på den opererade sidan jämfört med kontroller. Studie IV: Prospektiv kohortstudie av 840 patienter med felställd FNF där patienter som ingick i en RCT jämförs med de som inte gav sitt samtycke för deltagande eller ej inkluderats i screeningprocessen. De patienterna som inte gav sitt samtycke hade ökad dödlighet, men ingen skillnad i höftfunktion jämfört med deltagare. Slutsatser • Friska och kognitivt vitala äldre patienter med god höftfunktion innan en felställd lårbenshalsfraktur bör behandlas med total höftledsprotes. • DLsnittföring ger ett lika bra patientrapporterad höftfunktion men en ökad förekomst av hälta jämfört med PL snitt vid behandling med halvprotes på grund av en felställd lårbenshalsfraktur. • Ansträngning bör göras för att återställa benlängdsskillnad samtfemoral offset och därigenom minska risken för återkommande luxation. • Våra resultat tyder på att patienter som deltar i en randomiserad studie har lägre dödlighet än patienter som avböjt att delta samt de som missats i screeningprocessen. Det är viktigt att ta hänsyn till när extrapolerar studieresultat till ett hälso-och sjukvårdssystem. Detta bör vägas in i värderingen av studieresultatens externa validitet.
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Lundström, Maria. "Delirium in old patients with femoral neck fracture : risk factors, outcome, prevention and treatment /." Umeå : Univ, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-379.

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Books on the topic "Femoral neck stress fractures"

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Manninger, Jenő, Ulrich Bosch, Péter Cserháti, Károly Fekete, and György Kazár, eds. Internal fixation of femoral neck fractures. Vienna: Springer Vienna, 2007. http://dx.doi.org/10.1007/978-3-211-68585-3.

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Onslow, Liz. Prevention and management of hip fractures. London: Whurr, 2005.

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Henry, M. Stress fractures. Oxford University Press, 2011. http://dx.doi.org/10.1093/med/9780199550647.003.012017.

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♦ Stress fractures are fractures occurring as the result of repetitive, submaximal loads, in the absence of a specific precipitating traumatic event.♦ These fractures can be subdivided into two groups on the basis of aetiology. Whereas ‘fatigue fractures’ result from the excessive repetitive (i.e. abnormal) loading of normal bone, ‘insufficiency fractures’ are fractures resulting from normal forces acting on abnormal bone.♦ Early diagnosis allows the initiation of effective treatment that can prevent prolonged pain and disability, as well as avoiding the progression to displacement or a non-union.♦ While management decisions are generally focused on activity modification, protection of weight bearing, and immobilization, there is a subset of fractures at high risk for progression to complete fracture, non-union, or delayed union. These high-risk stress fractures, including tension-side femoral neck fractures and anterior tibial cortex fractures, require aggressive treatment to prevent the sequelae of poor healing.
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Parker, Martyn J. Femoral neck fractures. Oxford University Press, 2011. http://dx.doi.org/10.1093/med/9780199550647.003.012051.

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♦ Intracapsular fractures are classified by division into those fractures that are essentially undisplaced and those that are displaced♦ Undisplaced fractures are generally treated by reduction and internal fixation♦ Displaced fractures may be treated by reduction and internal fixation but this incurs the potential complications of re-displacement of the fracture, non-union, and avascular necrosis♦ Displaced fractures in the elderly are generally treated with a replacement arthroplasty.
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Ulrich, Bosch Jen Manninger Peter Cserh Ti. Internal Fixation of Femoral Neck Fractures. Springer, 2008.

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Filipov, Orlin. Surgical Treatment of Femoral Neck Fractures. Nova Science Publishers, Incorporated, 2019.

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Wolman, Roger. Sports injuries in the pelvic region. Oxford University Press, 2011. http://dx.doi.org/10.1093/med/9780199550647.003.007015.

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♦ The pelvis acts as a fulcrum for the forces transmitted between the lower limb and trunk especially on twisting and turning movements while running, and in the reverse direction when kicking. Sports injuries around the pelvis are therefore common in weight-bearing sports, such as running, football, rugby, and basketball♦ Injury can occur to the various structures around the pelvis. Bone stress injuries affect the symphysis pubis, pubic rami, femoral neck, and sacrum. Stress fractures are more common in women and may occur as part of the female athlete triad (Box 7.15.1) where there is hypo-oestrogenaemia and low bone density♦ Tendon injuries, including enthesopathies, most commonly affect the adductors, lower abdominals, glutei and hamstrings. Hip injuries can occur as a result of labral tears and femoroacetabular impingement. Sacroiliac joint instability may also cause symptoms especially in the buttock region. Synovitis of either joint may suggest an inflammatory arthritis♦ Pain is the most common symptom. However it may be referred from elsewhere, especially the lumbar spine. Pain may also originate from other systems including the reproductive organs and the gastrointestinal and urinary tracts.
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Internal fixation of femoral neck fractures: An Atlas. Springer, 2007.

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Bosch, Ulrich, Jenó Manninger, Peter Cserháti, Károly Fekete, and György Kazár. Internal fixation of femoral neck fractures: An Atlas. Springer, 2016.

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(Editor), Jenó Manninger, Ulrich Bosch (Editor), Peter Cserháti (Editor), Károly Fekete (Editor), and György Kazár (Editor), eds. Internal fixation of femoral neck fractures: An Atlas. Springer, 2007.

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Book chapters on the topic "Femoral neck stress fractures"

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Williams, Joel C., Felipe S. Bessa, and E. Bailey Terhune. "Surgical Technique: Surgical Fixation of Nondisplaced Femoral Neck Stress Fracture." In Hip Arthroscopy and Hip Joint Preservation Surgery, 1–8. New York, NY: Springer New York, 2021. http://dx.doi.org/10.1007/978-1-4614-7321-3_180-1.

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Koval, Kenneth J., and Joseph D. Zuckerman. "Femoral Neck Fractures." In Hip Fractures, 49–127. New York, NY: Springer New York, 2000. http://dx.doi.org/10.1007/978-1-4757-4052-3_5.

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Lasanianos, Nick G., and Nikolaos K. Kanakaris. "Femoral Neck Fractures." In Trauma and Orthopaedic Classifications, 305–8. London: Springer London, 2014. http://dx.doi.org/10.1007/978-1-4471-6572-9_68.

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Engelhardt, Peter W. "Femoral Neck Fractures." In Children's Orthopaedics and Fractures, 759–64. London: Springer London, 2009. http://dx.doi.org/10.1007/978-1-84882-611-3_47.

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Vécsei, Vilmos. "Femoral Neck Fractures." In Bone and Joint Injuries, 233–50. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-38388-5_19.

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Makhni, Melvin C., Eric C. Makhni, Eric F. Swart, and Charles S. Day. "Femoral Neck Fractures." In Orthopedic Emergencies, 283–87. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-31524-9_62.

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Chauhan, Govind S., Mehool Acharya, and Tim J. S. Chesser. "Femoral Neck Fractures." In Fracture Management Joint by Joint, 139–53. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-18838-2_12.

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Engelhardt, Peter W. "Femoral Neck Fractures." In Children’s Upper and Lower Limb Fractures, 105–10. London: Springer London, 2011. http://dx.doi.org/10.1007/978-0-85729-555-2_10.

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Kojima, Kodi E., and Jorge S. Silva. "Intracapsular Femoral Neck Fractures." In Fracture Reduction and Fixation Techniques, 193–204. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-24608-2_14.

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Murphy, Joshua S., Lisa K. O’Brien, and Sally Corey. "Proximal Femoral Stress Fractures." In Pediatric Orthopedic Trauma Case Atlas, 1–6. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-28226-8_92-1.

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Conference papers on the topic "Femoral neck stress fractures"

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Nakatsuchi, Hiroki, Naoyuki Watanabe, Yukio Nakatsuchi, Shigeru Tadano, Tetsuji Moriizumi, Shinichiro Mori, and Masahiro Endo. "Biomechanical Role of Trabecula Networks in the Human Proximal Femur Under Static Loading." In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-60100.

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Finite element models of human femur were constructed from micro structural data measured by a three-dimensional cone beam CT with the resolution of a 0.35mm cube as a voxel size. The results of static analysis on the assumption with one-legged support standing revealed that the tensile stress in the lateral cortex of the femoral neck and the compressive stress in the medical cortex remarkably increased after removing the trabecula networks. The change of stress distribution means that the trabecula networks would make a contribution to dissipating the concentration of tensile and compressive stress in the region of femoral neck. Therefore, the stress concentration even in static condition will increase the fracture risk of femoral neck as osteoporosis advances.
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Atwood, Sara A., Eli W. Patten, Kevin J. Bozic, Lisa A. Pruitt, and Michael D. Ries. "Double-Modular Hip Device Design Susceptible to Stress Corrosion Failure." In ASME 2009 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2009. http://dx.doi.org/10.1115/sbc2009-204734.

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Total hip replacements restore pain-free mobility to approximately 200,000 patients in the U.S. each year [1]. A typical hip system comprises a metal alloy stem, a femoral head (ceramic or metal alloy), and a polyethylene acetabular cup fit into a metal alloy backing. A modular press-fit Morse taper is commonly used to attach the femoral head to the stem. There are also more recent designs that incorporate a second interface at the neck-stem junction (Figure 1). Increased modularity in total hip replacement design allows the surgeon to intraoperatively preserve patient anatomy such as leg length and femoral anteversion and better balance the surrounding soft tissue for optimal biomechanics. However, modularity also increases the number of mechanical junctions and interfaces in the device which may lead to complications such as corrosion, wear, and fracture.
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Cristofolini, Luca, Francesco Pallini, Enrico Schileo, Mateusz Juszczyk, Elena Varini, Saulo Martelli, and Fulvia Taddei. "Biomechanical Testing of the Proximal Femoral Epiphysis: Intact and Implanted Condition." In ASME 8th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2006. http://dx.doi.org/10.1115/esda2006-95187.

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There is renewed interest in resurfacing hip prostheses. While stemmed prostheses have been extensively studied in the past, little is known about the biomechanics of epiphyseal prostheses. Our aim was to develop a combined experimental-numerical tool to study the intact and operated epiphysis. Bone and implant stress, relative micromotion and failure mode in the intact and implanted bone were investigated. Twelve pairs of cadaver human femurs were studied intact, to fully characterize the proximal epiphysis. Four were then implanted with a commercial resurfacing prosthesis. They were tested in the elastic range, while strains were measured with 15 rosettes. Implant micromotions were measured in the operated condition. A total of 7 loading scenarios were simulated to cover the range of typical motor tasks. Additionally, Finite Element (FE) models were built using a validated procedure for assigning inhomogeneous material properties based on CT data. To allow extensive validation of the FE model, additional measurements were taken in vitro: bone deflection in various points, indirect measurement of load application point, digitizing of the bone surface and gauge locations. The FE models were also used to identify the most critical load scenario to recreate in vitro spontaneous head-neck fractures. Strain measurements were successfully obtained in intact and implanted femurs, providing the natural strain pattern, and indicating moderate stress-shielding in the operated condition. Results on the 6 femurs that were modeled showed that FE can predict overall displacements with an accuracy of 0.4mm, and principal stress with an accuracy of 10% (Root Mean Squared, RMSE). In vitro failure tests were successful: all specimens fractured, with a variety of failures ranging from sub-capital to trans-trochanteric. This confirms the suitability of this test model to replicate spontaneous fractures in elderly subjects. In conclusion, an experimentally validated FE method was developed, that run in parallel with an optimized in vitro simulation. These tools can successfully predict the stress distribution and the failure mode in the proximal femur both in its natural condition and with a resurfacing prosthesis.
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Nakamura, Yukiko, Kazuhiko Adachi, Nungna Wi, and Mitsuaki Noda. "A Novel Dynamic Bone Stress Evaluation Method of Postoperative Proximal Femur During Gait by Using Elastic Multi Body Analysis Based on Finite Element Analysis." In ASME 2017 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/imece2017-71042.

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A proximal femur fracture due to osteoporosis is one of serious health care problems in aging societies. Osteosynthesis with pin or screw type of implants, such as Hansson pin (HP), Dual SC Screw (DSCS), is widely used for femoral neck fracture treatment in Japan. Unfortunately, some complications such as secondary fractures, especially peri-prosthetic fractures, may occur during postoperative rehabilitation period. In order to reveal the potential cause of the postoperative fracture from the viewpoint of the biomechanics, authors had already performed the dynamic stress analysis of the treated proximal femur based on finite element (FE) analysis. The final goal of our project is to establish the reliable postoperative bone fracture risk assessment method in response to the daily activity including mainly walking. The aim of this study is to propose a novel elastic multi body analysis method based on FE analysis for proximal femur biomechanics. Patient-specific 3D left hip joint FE model was constructed from an elderly female volunteer’s CT images. The model consists of the pelvis, proximal femur, cartilage and DSCS, as multi bodies. The dynamic loading and boundary conditions were applied to the model for simulating a gait motion. Direction and magnitude of the loads varies in response to the gait motion. The time dependent loading forces; hip contact, gluteus medius, gluteus maximus, tensor fasciae latae and adductor, acting around the hip joint was obtained by inverse dynamic analysis of a human gait using in-house lower-limb musculoskeletal model. These loading and boundary conditions for simulating the gait motion are the major technical advantages of the proposed multi body analysis comparing with the conventional static FE analysis. Time varying stress distribution during the gait was evaluated by using dynamic explicit method via ABAQUS. In order to visually demonstrate dynamic stress distribution, we examined the time varying von Mises stresses at the representative points located on the cortical surface of the proximal femur; femoral head, fracture surface and around the lateral insertion holes. The results indicate significant increase of the stresses around the proximal lateral insertion holes for DSCS treatment. Maximum stress values are good agreement with the previous static FE analysis, on the other hand, these biomechanical discussions based on the stress time histories are only obtained from the proposed method. It is indicated that the proposed method is feasible to support the better pre- and postoperative clinical decisions, which is the main contribution of this study.
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Yutzy, Joseph D., and Erik R. Bardy. "Average Periosteal Stress of the Proximal Femur Before and After Cementless Total Hip Arthroplasty." In ASME 2009 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2009. http://dx.doi.org/10.1115/sbc2009-203800.

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Cementless Total Hip Arthroplasty (THA) is a standard surgical technique for the treatment of several types of joint diseases and damages including, but not limited to, osteoarthritis and femoral neck fracture [1]. An estimated one half to one million total hip replacements are performed each year [2]. Two drawbacks to THA are (1): micromotions as a result of improper implant fit in the bone cavity [1], and (2): stress shielding due to unnatural stress concentrations near the implant [3]. The latter causes bone resorption in other areas found in the bone-implant interface [1]. Therefore, the geometry and size of the implant is a major factor in determining cortical stress distributions and stress shielding [4].
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Stratan, DN, M. Popa, O. Alexa, and L. Stratan. "OP0128 Femoral neck fractures in osteoporotic patients." In Annual European Congress of Rheumatology, Annals of the rheumatic diseases ARD July 2001. BMJ Publishing Group Ltd and European League Against Rheumatism, 2001. http://dx.doi.org/10.1136/annrheumdis-2001.507.

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Konvalinka, J. "EFFECT OF FEMORAL NECK AXIS ANGLES ON STRESS AND STRAIN IN PROLONGED FEMUR: FE STUDY." In Engineering Mechanics 2020. Institute of Thermomechanics of the Czech Academy of Sciences, Prague, 2020. http://dx.doi.org/10.21495/5896-3-286.

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"An Informative Machine-Learning Tool for Diagnosis of Osteoporosis using Routine Femoral Neck Radiographs." In InSITE 2019: Informing Science + IT Education Conferences: Jerusalem. Informing Science Institute, 2019. http://dx.doi.org/10.28945/4350.

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Aim/Purpose: The aim of the study was to analyze the structure of the bone tissue by using texture analysis of the bone trabeculae, as visualized in a routine radiograph of the proximal femur . This could provide objective information regarding both the mineral content and the spatial structure of bone tissue. Therefore, machine-learning tools were applied to explore the use of texture analysis for obtaining information on the bone strength. Background: One in three women in the world develops osteoporosis, which weakens the bones, causes atraumatic fractures and lowers the quality of life. The damage to the bones can be minimized by early diagnosis of the disease and preventive treatment, including appropriate nutrition, bone-building exercise and medications. Osteoporosis is currently diagnosed primarily by DEXA (Dual Energy X-ray Absorptiometry), which measures the bone mineral density alone. However, bone strength is determined not only by its mineral density but also by the spatial structure of bone trabeculae. In order to obtain valuable information regarding the bone strength, the mineral content and the spatial structure of the bone tissue should be objectively assessed. Methodology: The study includes 17 radiographs of in-vitro femurs without soft tissue and 44 routine proximal femur radiographs (15 subjects with osteoporotic fractures and 29 without a fracture). The critical force required to fracture the in-vitro femurs was measured and the bones were divided into two groups: 11 solid bones with critical fracture force higher than 4.9kN and 6 fragile bones with critical fracture force lower than 4.9kN. All the radiographs included an aluminum step-wedge for calibrating the gray-levels values (See Figure 3). An algorithm was developed to automatically adjust the gray levels in order to yield equal brightness and contrast. Findings: The algorithm characterized the in-vitro bones with as fragile or solid with an accuracy of 88%. For the radiographs of the patients, the algorithm characterized the bones as osteoporotic or non-osteoporotic with an accuracy of 86%. The most prominent features for estimating the bone strength were the mean gray-level, which is related to bone density, and the smoothness, uniformity and entropy, which are related to the spatial distribution of the bone trabeculae. Impact on Society: Analysis of bone tissue structure, using machine-learning tools will provide a significant information on the bone strength, for the early diagnosis of osteoporosis. The structure analysis can be performed on routine radiographs of the proximal femur, with high accuracy. Future Research: The algorithm for automatic structure analysis of bone tissue as visualized on a routine femoral radiograph should be further trained on a larger dataset of routine radiographs in order to improve the accuracy of assessing the bone strength.
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Ondrake, J. E., K. C. Lifer, S. P. Haman, J. E. Marquart, and Hui Shen. "Single Screw vs. Double Screw Device for Use in Treating Femoral Bone Fractures." In ASME 2010 International Mechanical Engineering Congress and Exposition. ASMEDC, 2010. http://dx.doi.org/10.1115/imece2010-38676.

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Proximal femur fractures commonly occur between the head of the femur and the femoral shaft. As the third most common injury encountered in orthopedic clinics, these fractures are typically treated with medical implants creating internal stabilization of the bone. Over 100 different implants are available for this application. Although the optimal choice for the implants is still controversial, traditional devices which include a single cylindrical screw, such as SHS (Sliding Hip Screw) and IMHS – CP (Intramedullary Hip Screw, Clinically Proven), are widely used to repair the bone fracture. However, the application of the single screw device still suffers technical problems. The head of the femur has the potential to rotate about the screw and the fracture surfaces have potential to slide over each other. In addition, force relaxation can occur, leading to inadequate contact between the fracture surfaces. To attack these problems and prevent possible complications, a new device has been developed. The new device consists of one long screw interlocked with one short screw, creating a cross-sectional figure-eight pattern and offering an integrated, interlocking screw option. The objective of the current study is to compare biomechanical characteristics within the bone caused by the new double screw device verses the traditional single screw device. Experiments were preformed to compare the torsional stiffness of the two devices. 2D and 3D finite element analysis methods were carried out to obtain macroscopic and microscopic responses of each device’s interaction with the fractured bone. The modeled results show a significant difference between the two geometries. The single screw geometry has higher maximum total deformation, equivalent strain, equivalent von Mises stress, and maximum principle stress. The improved rotational stability of the new double screw device may reduce the complication rate of instability of the fracture fragments.
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Declercq, P., L. Vanden Broeck, L. Moons, I. Du Bois, D. Scherrenberg, I. Spriet, A. Sermon, and WJ Metsemakers. "4CPS-030 Incidence and risk factors for prosthetic joint infection within 90 days after hemiarthroplasty for femoral neck fractures in the elderly." In 25th EAHP Congress, 25th–27th March 2020, Gothenburg, Sweden. British Medical Journal Publishing Group, 2020. http://dx.doi.org/10.1136/ejhpharm-2020-eahpconf.131.

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Reports on the topic "Femoral neck stress fractures"

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Xiang, Zhou, Zhao Chen, Rong Luo, and Yun Yang. Comparison of femoral neck system and cannulated screw of femoral neck fractures – a meta-analysis and systematic review. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, September 2021. http://dx.doi.org/10.37766/inplasy2021.9.0070.

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Xu, Keteng. Dual mobility total hip arthroplasty versus bipolar hemiarthroplasty in treating patients with displaced femoral neck fractures: A Systematic Review and Meta-Analysis. INPLASY - International Platform of Registered Systematic Review Protocols, April 2020. http://dx.doi.org/10.37766/inplasy2020.4.0085.

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Ji, Qing-hui. Efficacy of four hollow nail rhombic fixation for the treatment of patients with femoral neck fractures: a protocol of systematic review and meta-analysis. INPLASY - International Platform of Registered Systematic Review Protocols, April 2020. http://dx.doi.org/10.37766/inplasy2020.4.0106.

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