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Osteoporotic fracture of neck of femur — Clinical Guidelines

Overview

Osteoporotic fractures of the neck of femur are common debilitating injuries primarily affecting elderly individuals due to advanced age-related bone loss and fragility. These fractures significantly impact mobility, quality of life, and often lead to increased mortality rates. Patients aged 60 and above, particularly those with comorbidities such as osteoporosis, are most at risk. Effective management is crucial in day-to-day practice to mitigate complications, restore function, and improve survival rates 1 7 11.

Pathophysiology

The pathophysiology of osteoporotic femoral neck fractures involves a complex interplay of factors including severe bone mineral density reduction, microarchitectural deterioration of bone tissue, and mechanical stress exceeding the compromised bone strength. Low-energy trauma, such as falls from standing height, can precipitate fractures in these weakened areas. At a cellular level, decreased osteoblast activity and increased osteoclast function contribute to bone resorption, further weakening the femoral neck. Additionally, vascular insufficiency can exacerbate avascular necrosis in the femoral head, complicating healing and increasing the risk of nonunion and avascular complications 1 16.

Epidemiology

Femoral neck fractures predominantly affect individuals over 65 years of age, with incidence rates increasing significantly with advancing age. The prevalence is higher in women due to greater bone loss associated with menopause. Geographic variations exist, influenced by lifestyle factors, healthcare access, and population demographics. Globally, the incidence is projected to rise due to aging populations, making it a growing public health concern 7 18. Trends show an increasing number of elderly patients presenting with these fractures, necessitating optimized treatment strategies 1 11.

Clinical Presentation

Patients typically present with severe pain in the groin, hip, or knee, often following a minor fall. Symptoms can include inability to bear weight on the affected limb, shortening and external rotation of the limb (Trendelenburg sign), and limited range of motion. Red-flag features include signs of neurovascular compromise, significant swelling, or inability to reduce the fracture manually. Prompt recognition is critical to avoid complications such as deep vein thrombosis (DVT) and pulmonary embolism 1 19.

Diagnosis

The diagnostic approach involves a thorough clinical evaluation followed by imaging studies. Specific Criteria and Tests:

Plain Radiographs: Essential for initial assessment; Garden classification helps stage the fracture (I: impacted, II: slight displacement, III: moderate displacement, IV: severe displacement).

CT/MRI: Useful for detailed assessment of fracture comminution, soft tissue injury, and potential avascular necrosis.

Laboratory Tests: Complete blood count (CBC), coagulation profile, and biochemical markers of bone turnover (e.g., serum calcium, ALP, CTX) to assess overall health and fracture healing potential.

Differential Diagnosis:

- Avascular Necrosis: Differentiates based on imaging showing bone collapse and MRI findings. - Hip Dislocation: Radiographic signs of femoral head displacement beyond the acetabulum. - Subtrochanteric Fracture: Location and pattern distinct from femoral neck fractures on radiographs 1 19 20.

Management

Initial Management

Pain Control: Analgesics (e.g., NSAIDs, opioids) to manage acute pain.

Immobilization: Use of skeletal traction or a hip spica cast to stabilize the fracture temporarily.

Preoperative Optimization: Address comorbidities, manage DVT prophylaxis, and optimize nutritional status.

Surgical Interventions

#### Internal Fixation (IF)

Technique: Cannulated screws, dynamic hip screw, or sliding hip screw systems.

Indications: Younger patients with good bone quality, lower surgical risk.

Contraindications: Severe osteoporosis, significant comorbidities, high risk of fixation failure.

Monitoring: Regular follow-up radiographs to assess healing and implant stability 1 10.

#### Arthroplasty

Hemiarthroplasty: Austin Moore, Thompson, or bipolar prostheses.

Total Hip Arthroplasty (THA): Preferred in elderly patients with poor bone quality or multiple comorbidities.

Fixation Method: Cemented vs. cementless fixation; cemented fixation may reduce early complications but has its own risks (e.g., fat embolism).

Indications: Elderly patients with displaced femoral neck fractures, poor bone quality, or high risk of nonunion.

Monitoring: Postoperative rehabilitation, regular follow-up for implant function and patient mobility 1 8 15.

Postoperative Care

Rehabilitation: Early mobilization, physical therapy to regain strength and mobility.

Infection Surveillance: Regular monitoring for signs of infection.

Secondary Prevention: DVT prophylaxis, fall prevention strategies, and osteoporosis management.

Complications

Acute Complications: Periprosthetic infection, deep vein thrombosis, pulmonary embolism, avascular necrosis.

Long-term Complications: Prosthetic loosening, wear debris-induced osteolysis, revision surgery needs.

Management Triggers: Persistent pain, swelling, fever, or radiographic signs of loosening or infection warrant immediate referral to orthopedic specialists 1 12 19.

Prognosis & Follow-up

Prognosis varies based on patient age, comorbidities, and treatment modality. Key prognostic indicators include initial fracture displacement, surgical technique success, and postoperative rehabilitation adherence. Recommended follow-up intervals include:

Immediate Postoperative: Weekly for the first month.

Subsequent: Every 3 months for the first year, then annually to monitor implant stability, functional recovery, and bone health 1 11.

Special Populations

Elderly Patients

Considerations: Higher risk of complications, need for careful preoperative risk stratification, and tailored rehabilitation plans.

Management: Prioritize THA over IF due to lower complication rates and better functional outcomes 1 7.

Comorbidities

Osteoporosis: Aggressive management with bisphosphonates or teriparatide post-fracture.

Cardiovascular Disease: Close monitoring for perioperative cardiac events and optimized anticoagulation strategies 1 14.

Key Recommendations

Primary Surgical Intervention: For displaced femoral neck fractures in patients aged 60-80, arthroplasty (THA or hemiarthroplasty) is recommended over internal fixation due to lower complication rates and better functional outcomes 1 7 (Evidence: Strong).

Patient Selection for THA vs. Hemiarthroplasty: Consider patient age, bone quality, and comorbidities; THA may be preferred in elderly patients with poor bone quality 8 (Evidence: Moderate).

Cemented vs. Cementless Fixation: In THA, cemented fixation may offer advantages in reducing early complications but should be balanced against potential long-term risks 8 (Evidence: Moderate).

Early Mobilization: Initiate early postoperative mobilization and physical therapy to enhance recovery and reduce complications 1 15 (Evidence: Strong).

DVT and Infection Prophylaxis: Implement rigorous DVT prophylaxis and monitor for signs of infection postoperatively 1 19 (Evidence: Strong).

Osteoporosis Management: Initiate or optimize osteoporosis treatment post-fracture to prevent future fractures 1 14 (Evidence: Moderate).

Regular Follow-up: Schedule regular follow-up visits to monitor implant stability and functional outcomes, particularly in the first year post-surgery 1 11 (Evidence: Strong).

Risk Stratification: Preoperative assessment should include comprehensive risk stratification to guide surgical choice 1 20 (Evidence: Moderate).

Rehabilitation Tailoring: Tailor rehabilitation programs to individual patient needs, focusing on functional independence 1 12 (Evidence: Moderate).

Cost-Effectiveness Analysis: Consider cost-effectiveness in resource-limited settings, favoring hemiarthroplasty over THA when appropriate 13 (Evidence: Moderate).

References

1 Mitsutake R, Tanino H, Sato G, Ito H. Internal fixation versus total hip arthroplasty for displaced femoral neck fractures in patients aged 60 to 80 years: Patient-reported outcomes and complications. PloS one 2025. link 2 Stołtny T, Dugiełło B, Pyda M, Pasek J, Rokicka D, Wróbel M et al.. Cementless femoral neck endoprosthesis SPIRON in men in aspects of clinical status and quality of life in an average 7-year follow-up. BMC musculoskeletal disorders 2022. link 3 Cui S, Wang D, Wang X, Li Z, Guo W. The choice of screw internal fixation and hemiarthroplasty in the treatment of femoral neck fractures in the elderly: a meta-analysis. Journal of orthopaedic surgery and research 2020. link 4 Gao H, Liu Z, Xing D, Gong M. Which is the best alternative for displaced femoral neck fractures in the elderly?: A meta-analysis. Clinical orthopaedics and related research 2012. link 5 Al Mwuad'a MHH. Functional outcome of cemented austin moor hemiarthroplasty for treatment of neck femur fracture in elderly. European journal of orthopaedic surgery & traumatology : orthopedie traumatologie 2025. link 6 Passini-Sánchez J, Gómez-Palomo JM, Martínez-Crespo A, Zamora-Navas P. Factors associated with in-hospital and 12-month mortality in patients undergoing hip arthroplasty for femoral neck fracture. Medicina clinica 2025. link 7 Demirel M, Birinci M, Hakyemez ÖS, Azboy N, Bingöl İ, Ata N et al.. Epidemiology, treatment, and mortality of femoral neck fractures in patients over the age of 65 years: a nationwide retrospective cohort study of 83,789 cases in Turkey. Hip international : the journal of clinical and experimental research on hip pathology and therapy 2025. link 8 Hameed D, McCormick BP, Sequeira SB, Dubin JA, Bains SS, Mont MA et al.. Cemented Versus Cementless Femoral Fixation for Total Hip Arthroplasty Following Femoral Neck Fracture in Patients Aged 65 and Older. The Journal of arthroplasty 2024. link 9 Liu K, Sheng J, Zhang H, Liu L, Tang Y, Zhu Z et al.. Risk Factors for Mortality After Uncemented Bipolar Hemiarthroplasty for Geriatric Displaced Femoral Neck Fracture. Orthopedics 2021. link 10 Honkanen JS, Ekman EM, Huovinen VK, Mäkelä KT, Koivisto M, Karvonen MP et al.. Preoperative Posterior Tilt Increases the Risk of Later Conversion to Arthroplasty After Osteosynthesis for Femoral Neck Fracture. The Journal of arthroplasty 2021. link 11 Campenfeldt P, Ekström W, Al-Ani AN, Weibust E, Greve K, Hedström M. Health related quality of life and mortality 10 years after a femoral neck fracture in patients younger than 70 years. Injury 2020. link 12 DeRogatis MJ, Piatek AZ, Jacob R, Kelly SC, Issack PS. Hemiarthroplasty for Femoral Neck Fractures in the Elderly: A Comparison of Cemented and Uncemented Femoral Stems. JBJS reviews 2020. link 13 Liu H, Li N, Zhang X, He L, Li D, Li Y et al.. Internal fixation versus hemiarthroplasty for displaced femoral neck fractures in the elderly: A cost-effectiveness analysis. Injury 2020. link 14 Ravi B, Pincus D, Khan H, Wasserstein D, Jenkinson R, Kreder HJ. Comparing Complications and Costs of Total Hip Arthroplasty and Hemiarthroplasty for Femoral Neck Fractures: A Propensity Score-Matched, Population-Based Study. The Journal of bone and joint surgery. American volume 2019. link 15 Barenius B, Inngul C, Alagic Z, Enocson A. A randomized controlled trial of cemented versus cementless arthroplasty in patients with a displaced femoral neck fracture: a four-year follow-up. The bone & joint journal 2018. link 16 Rogmark C, Leonardsson O. Hip arthroplasty for the treatment of displaced fractures of the femoral neck in elderly patients. The bone & joint journal 2016. link 17 Lin CC, Huang SC, Ou YK, Liu YC, Tsai CM, Chan HH et al.. Survival of patients aged over 80 years after Austin-Moore hemiarthroplasty and bipolar hemiarthroplasty for femoral neck fractures. Asian journal of surgery 2012. link 18 Hepgüler S, Cetin A, Değer C, Erkent U. Osteoporotic hip fracture costs in the elderly Turkish population. Acta orthopaedica et traumatologica turcica 2011. link 19 Melvin JS, Matuszewski PE, Scolaro J, Baldwin K, Mehta S. The role of computed tomography in the diagnosis and management of femoral neck fractures in the geriatric patient. Orthopedics 2011. link 20 Valavičienė R, Smailys A, Macijauskienė J, Hommel A. Factors affecting health-related quality of life in patients after femoral neck fracture. Medicina (Kaunas, Lithuania) 2010. link 21 Cicvarić T, Bencević-Striehl H, Juretić I, Marinović M, Grzalja N, Ostrić M. Hip fractures in elderly--ten years analysis. Collegium antropologicum 2010. link 22 York JD, Allen PG, Smith BP, Jinnah RH. Prosthetic treatment of hip fractures in the elderly patient. Journal of surgical orthopaedic advances 2010. link 23 Aleem IS, Karanicolas PJ, Bhandari M. Arthroplasty versus internal fixation of femoral neck fractures: a clinical decision analysis. Ortopedia, traumatologia, rehabilitacja 2009. link

Osteoporotic fracture of neck of femur