Femoral head necrosis, also called avascular necrosis of the femoral head, is a serious condition in which the bone tissue in the femoral head dies due to inadequate blood supply. This leads to significant pain and mobility restrictions, which may ultimately require a hip replacement. A modern and promising solution for patients with femoral head necrosis is the use of short-stem prostheses. In this blog, we will thoroughly explore the benefits and suitability of short-stem prostheses in the treatment of femoral head necrosis.

What is a short stem prosthesis?

Short stem prostheses are special hip implants that are characterized by their shortened stem. In contrast to conventional hip prostheses, which have a long stem, short stem prostheses are less invasive and require less bone substance for anchoring. This offers several advantages, especially for younger and more active patients.

Benefits of short-stem prosthesis in femoral head necrosis

Bone conservation

A significant advantage of the short stem prosthesis is the significant bone preservation. Since the prosthesis has only a short stem, less bone material is removed in the thigh. This is particularly beneficial for younger patients or those who may require revision in the future. The preservation of bone material can facilitate future surgeries and improve overall outcomes.

More natural movement pattern

The shorter stem length and the design of the short stem prostheses contribute to enabling a more natural movement pattern. This leads to improved proprioception and mobility. Patients often report a more natural feeling in the hip joint and a faster return to normal activities.

Minimal Invasiveness

Short-stem prostheses can often be implanted using minimally invasive surgical techniques. This reduces the trauma for the patient, leads to shorter operation times and faster recovery phases. The lower tissue damage also means less postoperative pain and faster rehabilitation.

Lower risk of complications

By using short-stem prostheses, the risk of complications such as periprosthetic fracture can be reduced. These fractures occur more frequently with conventional long-stem prostheses, especially in older patients or those with poor bone substance. Short-stem prostheses provide a more stable anchorage and a more even load distribution.

Suitability of short-stem prosthesis for different patient groups

Younger Patients

Younger patients with avascular necrosis of the femoral head particularly benefit from short-stem prostheses. The ability to preserve bone material is invaluable for future revisions. Additionally, faster rehabilitation enables a quick return to an active lifestyle.

Older Patients

Even older patients can benefit from the advantages of short-stem prostheses. The minimally invasive technique and reduced surgical trauma lead to faster recovery and fewer postoperative complications. This can significantly improve overall quality of life.

Patients with poor bone substance

Patients whose bone substance is already impaired should receive a cemented implant in case of doubt. Cemented short stems or standard stems are available for this purpose.

Case studies and clinical trials

Numerous clinical studies and case studies have confirmed the effectiveness and safety of short-stem prostheses in avascular necrosis of the femoral head. One study reports a high satisfaction rate among patients who have undergone short-stem prosthesis implantation. Most patients were able to return to their normal activities within a few weeks after surgery.

Another example is a long-term study that showed that short-stem prostheses not only allow for rapid recovery but also represent a long-lasting solution. The 10-year survival rate of the prostheses was comparable to that of conventional straight-stem prostheses, but with significantly fewer complications and revisions.



Preparation and follow-up care

A successful operation with a short-stem prosthesis begins with thorough preparation. Patients should be comprehensively informed about the procedure, the expected results, and the necessary postoperative measures. Targeted prehabilitation, strengthening of the musculature, and optimization of the general physical condition can positively influence the healing process.

After surgery, structured rehabilitation is crucial. Physiotherapy helps improve mobility and strengthen muscles. Regular follow-up examinations ensure that the prosthesis functions correctly and any potential complications are detected early.

Conclusion

Short stem prostheses can be an excellent choice for patients with femoral head necrosis. Their advantages in terms of bone preservation, natural movement pattern, minimal invasiveness, and lower risk of complications make them an attractive option for both younger and older patients. With proper preparation and follow-up care, patients can expect a significant improvement in their quality of life and a quick return to normal activities. The surgeon's experience with short stem prostheses is the decisive factor for success.