The femoral neck fracture is one of the most common fractures in older people and poses a significant challenge for orthopaedic surgery. This type of fracture affects the area of the femur that lies directly below the hip joint and often requires surgical intervention. In this article, the different types of hip prostheses for femoral neck fractures, including their advantages and disadvantages, are explained in detail. Particular attention is paid to short-stem prostheses, which have gained popularity in recent years. The aim is to provide patients with informed decision-making support to help them choose the appropriate prosthesis.

What is a femoral neck fracture?

A femoral neck fracture is a break of the femoral neck, the part of the thigh bone that extends into the hip joint. This injury occurs frequently in older people, especially in women after menopause, due to reduced bone density (osteoporosis).

Causes

• Falls: The most common cause of a femoral neck fracture is a fall.
• Accidents: Traffic accidents or other serious accidents can also lead to a femoral neck fracture.
• Osteoporosis: Reduced bone density increases the risk of fractures with minimal trauma.

Symptoms

• Pain: Severe pain in the hip or groin.
• Limited mobility: Difficulty moving or lifting the leg.
• Inability to walk: In most cases, walking is impossible.

Treatment Options for Femoral Neck Fracture

The treatment of a femoral neck fracture can be conservative or surgical, with surgical treatment being the most frequently chosen option.

Conservative treatment

• Bed rest: Immobilization in bed, which is associated with significant risks such as thrombosis and pneumonia.
• Attempt at Full Weight-Bearing in Impacted Fractures
• Physiotherapy: To maintain muscle strength and mobility.

Surgical Treatment

Surgical treatment involves various types of hip prostheses, selected based on patient age, activity level, and bone health.

Types of hip prostheses for femoral neck fractures

There are several types of hip prostheses that can be used in a femoral neck fracture. The choice of the right prosthesis depends on various factors, including the patient's age, activity level, and bone quality.

Cemented Prostheses

Benefits

• Stability: Provides immediate stability, which is particularly beneficial for older patients.
• Costs: Generally more cost-effective than non-cemented prostheses.

Disadvantages

• Loosening: Can become loose over time.
• Difficult revision: The removal and replacement of a cemented prosthesis can be more complicated.

Uncemented prostheses

Benefits

• Longer durability: Less risk of loosening compared to cemented prostheses.
• Easier Revision: Easier to replace than cemented prostheses.

Disadvantages

• Costs: Generally more expensive than cemented prostheses.
• Integration: Requires a longer time for integration and initial stability may be lower.

Hybrid Prostheses

These combine a cemented stem with an uncemented cup to utilize the advantages of both systems.

Benefits

• Stability and durability: Offers the immediate stability of a cemented stem and the durability of a non-cemented cup.

Disadvantages

• Complexity: Can increase the complexity and cost of the operation.

Short-stem prostheses for femoral neck fractures

The short stem prosthesis is a newer development in endoprosthetics and offers some unique advantages, particularly for younger and more active patients.

Benefits of the short stem prosthesis

• Preservation of bone: Less bone is removed, making future revisions easier.
• Anatomical: Better adapted to the natural anatomy of the femur.
• Less trauma: Minimizes surgical trauma and enables faster recovery.

Disadvantages of the short stem prosthesis

• Surgeon's experience: Requires an experienced surgeon to achieve optimal results.
• Long-term data: Long-term studies are still limited, although early results are promising.

Indications for short stem prostheses

• Younger patients: Particularly suitable for younger, active patients.
• Good Bone Health: Patients with good bone quality benefit the most.

Decision support for patients

Deciding on the right hip prosthesis can be complex and should be made in close collaboration with an experienced orthopedic surgeon. Here are some considerations:

Questions you should ask your surgeon

• Which prosthesis do you recommend for my situation and why?
• How long does recovery take?
• What risks and complications are associated with the chosen prosthesis?
• How many such operations have you performed so far?

Personal considerations

• Lifestyle: Consider your lifestyle and activity levels.
• Health status: Your overall health and bone density play an important role.
• Future plans: Consider future revisions and how easily they can be performed.



Conclusion

Choosing the right hip prosthesis for a femoral neck fracture is crucial for the patient's long-term mobility and quality of life. Short-stem prostheses offer many benefits, especially for younger and more active patients, but require an experienced surgeon and careful planning. Through a thorough discussion with your orthopedic surgeon and a comprehensive assessment of your individual needs, you can make the best possible decision.