Below, you’ll learn who is a good candidate for hip surface replacement, how the surgery is performed, what advantages the method offers, and what aspects to consider during postoperative care.
What is a hip surface replacement?
Hip surface replacement is a modern orthopedic procedure used to treat advanced hip osteoarthritis. Unlike traditional total hip replacement (THR), this procedure does not involve removing the entire femoral head. Instead, the damaged joint surface of the femoral head is precisely prepared and covered with a custom-fit cap. At the same time, the acetabulum is replaced with an artificial acetabular cup.
This procedure is also known as hip resurfacing, a cap prosthesis, or a McMinn prosthesis. The greatest advantage lies in the preservation of a large portion of the natural bone substance, which largely preserves the original anatomy and biomechanics of the hip joint. Surface replacement was developed specifically for active patients who have high functional demands on their mobility and load-bearing capacity.
When is hip surface replacement recommended?
Hip surface replacement is particularly suitable for patients suffering from advanced osteoarthritis who continue to experience significant symptoms despite conservative treatments such as physical therapy, pain management, or injections.
Typical indications include:
- Advanced hip osteoarthritis (coxarthrosis)
- Avascular necrosis of the femoral head in selected stages
- Post-traumatic joint damage
- Certain forms of hip misalignment
- Degenerative joint changes in younger patients
Particularly suitable are:
- physically active patients
- People with good bone quality
- Patients with high physical demands due to sports or their profession
- often patients under 65 years of age
Sufficient stability of the femoral head and neck is a prerequisite for the successful implantation of a surface replacement.
When is a total hip replacement (THR) the better choice?
Not every patient is a suitable candidate for a surface replacement. In certain situations, a traditional hip replacement offers greater safety and long-term stability.
The most important exclusion criteria include:
- Severe osteoporosis
- Poor bone quality
- Severe deformities of the femoral head
- Extensive bone cysts
- Certain forms of femoral head necrosis
- Metal allergies to metal-containing implants
Before any surgery, a comprehensive diagnostic evaluation is therefore performed, including a clinical examination and modern imaging, to determine the optimal treatment strategy.
How is the surgery performed?
The procedure is performed at specialized centers for hip surgery and joint replacement.
Preparation
The following tests are performed before surgery:
- Detailed orthopedic examination
- X-rays of the hip
- MRI or CT scan, if necessary
- Bone quality analysis
- Planning of implant size
Surgical Procedure
During the surgery, the damaged articular cartilage of the femoral head is removed. The surgeon then precisely shapes the femoral head so that a custom-fit cap can be placed over it. The diseased acetabulum is also replaced and fitted with an artificial joint surface.
Since the femoral head and femoral neck are largely preserved, significantly less bone is removed than in a traditional total hip replacement. This makes the procedure particularly gentle on the bone.
What are the advantages of hip surface replacement?
Surface replacement offers numerous advantages, particularly for younger and active patients:
Bone Preservation
Most of the femur is preserved. This makes any potential future revision surgeries easier.
Natural Movement Patterns
By preserving the original anatomy, the natural gait is often better restored.
High joint stability
The large femoral head reduces the risk of joint dislocation.
Physical activity
Many patients can resume athletic activities and engage in more demanding forms of exercise after successful rehabilitation.
Anatomical reconstruction
The joint mechanics more closely resemble those of the natural hip joint than those of some conventional prosthetic systems.
What are the potential risks and complications?
Like any surgical procedure, hip surface replacement is associated with risks.
Possible complications include:
- Infections
- Wound healing disorders
- Thrombosis or embolism
- Loosening of the implant
- Femoral neck fractures
- Material wear
- Implant wear
The treating hip specialist performs an individualized risk assessment as part of the preoperative planning. Modern implant materials and improved surgical techniques have significantly increased the safety of the procedure in recent years.
Postoperative Care and Rehabilitation
Rehabilitation begins shortly after surgery.
The most important measures include:
Early Mobilization
On the very first day after the procedure, patients begin their first range-of-motion exercises under the guidance of a physical therapist.
Physical Therapy
The goal is to restore:
- Mobility
- Muscle strength
- Coordination
- Gait pattern
Progressive loading
The load is gradually increased. The exact procedure depends on the type of implant, bone quality, and the individual healing process.
Return to Daily Life
Many patients can resume daily activities after just a few weeks. A return to athletic activities is determined on an individual basis following medical clearance. Hip rehabilitation at a specialized facility may be recommended to support the recovery process.
Long-Term Results and Prognosis
Hip surface replacement achieves very good functional results in carefully selected patients. Many patients report a significant reduction in pain, improved mobility, and a high level of satisfaction in daily life as well as during sports.
The following factors are crucial for long-term success:
- Proper patient selection
- A high level of surgical expertise
- Modern implant systems
- Consistent rehabilitation
For active people with good bone quality, hip surface replacement is therefore an attractive alternative to traditional hip replacement.
Which doctor specializes in hip surface replacement?
Hip surface replacement is one of the most challenging procedures in modern hip arthroplasty and should be performed exclusively by experienced hip specialists.
Specialized orthopedic surgeons and joint replacement specialists have extensive experience in preoperative planning, implant selection, and surgical execution. Choosing an experienced center plays a key role in ensuring the safety of the procedure and long-term treatment success.
Patients should therefore consult certified joint replacement centers or recognized experts in hip surgery who regularly perform surface replacement surgeries. A good place to start your search is the German Joint Center in Heidelberg or the Helios Endo-Clinic in Hamburg.
Frequently Asked Questions (FAQ) About Hip Surface Replacement
What is the difference between hip surface replacement and a hip prosthesis?
The main difference lies in the preservation of bone tissue. While in a traditional total hip replacement (THR) the femoral head is completely removed and replaced with a prosthetic stem, in hip surface replacement the natural femoral head is largely preserved. It is simply covered with a special metal cap. This allows the natural anatomy of the hip joint to be better preserved.
Who is a good candidate for a hip surface replacement?
A hip surface replacement is particularly suitable for physically active patients with advanced hip problems and good bone quality. Younger patients under the age of 65 often benefit from this procedure. The treating hip specialist will determine whether the method is suitable in each individual case following a comprehensive examination.
When is a hip surface replacement not an option?
Hip resurfacing is often not recommended in cases of severe osteoporosis, poor bone quality, large bone defects, or certain forms of avascular necrosis of the femoral head. Metal allergies may also preclude the use of certain implant systems.
What are the advantages of a hip surface replacement?
The most important advantages include preservation of bone mass, high joint stability, a natural range of motion, and good conditions for participating in sports. In addition, future revision surgeries are often easier to perform because the bone has been preserved.
How long does the surgery take?
The surgery usually takes between 60 and 120 minutes. The exact duration depends on the patient’s individual anatomy and the complexity of the procedure.
How long will I have to stay in the hospital?
The hospital stay is usually between four and seven days. The exact length of stay depends on the healing process and the patient’s overall health.
When can I walk again after the surgery?
In most cases, patients begin moving around as early as the first day after surgery. Under the guidance of a physical therapist, patients learn to walk again early on and to safely bear weight on the new joint.
How long does rehabilitation take?
Rehabilitation generally takes several weeks. Depending on the patient’s individual baseline condition and activity level, it may take several months to fully regain the ability to bear weight.
Can I play sports again after a hip surface replacement?
Yes. One of the major advantages of hip surface replacement is that many patients can resume sports activities after completing rehabilitation. Sports that are particularly gentle on the joints—such as cycling, hiking, swimming, or golf—are often possible without any problems. Which activities are recommended on an individual basis should be discussed with the treating physician.
How long does a hip surface replacement last?
The lifespan depends on various factors, such as age, activity level, bone quality, and implant type. In suitable patients, modern implants can function reliably for many years or even decades. Regular follow-up visits help monitor the implant’s function over the long term.
Is hip surface replacement painful?
After surgery, temporary wound pain may occur, but this can usually be well controlled with modern pain management. After the healing phase, most patients report a significant reduction or complete elimination of their osteoarthritis-related pain.
What are the risks associated with hip surface replacement?
As with any surgical procedure, there are risks such as infections, blood clots, wound healing complications, or implant loosening. In rare cases, femoral neck fractures or implant-specific complications may occur. Careful patient selection and surgery performed by experienced specialists help minimize these risks.
Is it possible to switch to a hip prosthesis later on?
Yes. If it becomes necessary to replace the implant over the years, the surface replacement can often be converted to a traditional hip prosthesis. Since a significant amount of bone is preserved during the initial procedure, the conditions for a later revision are often more favorable.
Does health insurance cover the costs?
If medically indicated, the costs of hip surface replacement are generally covered by both public and private health insurance plans. Individual eligibility requirements should be clarified with the respective health insurance provider before the procedure.
About the medical author
Sabine Schneider
Editor-in-Chief
Sabine Schneider – medical author: Explore expert articles and medical expertise in the Leading Medicine Guide.
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