Hip Dislocation Surgery

What Is Traumatic Hip Dislocation?

Traumatic hip dislocation is the complete separation of the femoral head from the acetabulum. There are two main types, based on the direction of the dislocation:

1. Posterior (Backward) Dislocation: The most common type (85-90%). It typically occurs when the knee and hip are in a flexed position and a strong force strikes the knee from the front (e.g., hitting the dashboard in a traffic accident), driving the femoral head backward. The leg is usually seen shortened, internally rotated, and flexed toward the other knee (adduction and flexion). The risk of sciatic nerve injury is higher with this type of dislocation.
2. Anterior (Forward) Dislocation: Less common. It usually occurs when the hip is forced while in an outward, open position (abduction and external rotation). The leg may appear rotated outward and spread to the side. It can carry a risk of femoral vessel and nerve injury.

Traumatic hip dislocation is a serious injury requiring emergency intervention, not only because it damages the joint itself, but also because it disrupts blood flow to the femoral head, raising the risk of Avascular Necrosis (AVN), and can compress important nerves such as the sciatic nerve, leading to permanent damage.

What Causes Traumatic Hip Dislocation?

It usually results from high-energy trauma:

• Motor Vehicle Accidents: Particularly dashboard injuries.
• Falls from Height: Construction workers, climbers, etc.
• Workplace Accidents: Being trapped under heavy objects, etc.
• Severe Sports Injuries: Contact sports such as American football and rugby.

Because bone quality weakens with age, fractures accompanying hip dislocation can sometimes occur in elderly patients even from lower-energy trauma (simple falls).

Symptoms and Emergency Management

The symptoms of traumatic hip dislocation are usually very clear:

• Very Severe Hip and Groin Pain.
• Inability to Move the Leg.
• Visible Leg Deformity: The leg lying in an abnormal position (shortened, rotated inward or outward).

Emergency Management:

• The Patient Must Not Be Moved Under Any Circumstances.
• 112 Emergency Services should be called immediately, and transfer to the nearest well-equipped hospital’s emergency department arranged.
• IN THE EMERGENCY DEPARTMENT:
  
  • The patient’s general condition and any additional injuries are assessed.
  • A careful neurovascular examination (nerve and vascular status) is performed.
  • X-rays are taken to confirm the dislocation and check for any accompanying fracture.
  • Closed Reduction: Once the diagnosis is made, the hip joint is manipulated back into place by the physician (closed reduction) as soon as possible (ideally within the first 6-8 hours), usually under anesthesia or deep sedation in an operating room setting. Early reduction reduces the risk of disruption to blood flow to the femoral head (AVN) and the risk of nerve damage.
  • After reduction, another X-ray is taken to confirm the joint is back in place and to check the status of any accompanying fractures.

Diagnostic Methods (After the Dislocation Is Reduced)

Once the hip joint has been successfully reduced, the truly important task is to identify any accompanying damage. The following methods are used at this stage:

• X-ray (After Reduction): Taken to check whether the joint is fully seated, whether the joint space is normal, and whether an additional fracture occurred during reduction. It can particularly reveal fractures of the femoral head or acetabulum.
• Computed Tomography (CT): The most important test that should almost always be performed after closed reduction. CT shows, far more clearly than X-ray, small bone fractures that can be missed on X-ray (particularly femoral head – Pipkin fractures – and acetabular wall fractures) and, even more importantly, small bone or cartilage fragments that may have fallen into the joint (loose bodies). CT findings directly influence the decision on whether surgery is needed.
• Magnetic Resonance Imaging (MRI): Usually not required in the emergency setting. It may be requested later to evaluate soft tissue (labrum, cartilage) damage or to screen for Avascular Necrosis (AVN) risk, which can develop months later.

When Is Surgery Needed After a Hip Dislocation?

Although closed reduction is the first step, surgical intervention may be necessary after a traumatic hip dislocation in many situations:

1. Irreducible Dislocation: The hip cannot be reduced by closed methods. This is usually due to soft tissue (labrum, capsule, muscle) or a bone/cartilage fragment trapped within the joint. In this case, open reduction (surgically opening the joint and putting it back in place) is required.
2. Accompanying Acetabular (Socket) Fractures: If there are displaced fractures in the wall or columns of the hip socket that disrupt joint stability or create a step-off in the joint surface, they must be surgically repaired (ORIF) to restore joint congruity and prevent future osteoarthritis.
3. Accompanying Femoral Head Fractures (Pipkin Fractures): If there are displaced fracture fragments in the femoral head, they may need to be fixed in place (ORIF) or, in some cases, removed. In severely comminuted femoral head fractures that cannot be repaired, a hip replacement (hemiarthroplasty or total hip replacement) may be required.
4. Loose Bodies Within the Joint: If bone or cartilage fragments are seen within the joint on post-reduction CT, they must be removed via arthroscopic (closed) or open surgery to prevent further damage to the joint surfaces.
5. Instability After Reduction: If the hip remains unstable after reduction and dislocates easily again (usually due to a large acetabular fracture or severe ligament damage), surgery may be needed to restore stability.
6. Delayed Presentation: If a long time has passed since the dislocation (days), closed reduction becomes difficult or impossible and open reduction may be required. The risk of AVN also increases.
7. Late Complications: In situations such as Avascular Necrosis (AVN) or Post-traumatic Osteoarthritis that develop months or years after the injury, total hip replacement surgery may be required.

Surgical Methods Used After Hip Dislocation

The main surgical methods applied, depending on need, are as follows:

• Open Reduction: Surgically opening the joint to put it back in place.
• ORIF (Open Reduction Internal Fixation): Repositioning fracture fragments and fixing them with metal implants such as plates and screws (for acetabular or femoral head fractures).
• Arthroscopic Surgery: Entering the joint through small incisions with a camera to remove loose bodies and treat accompanying labral or cartilage damage.
• Hip Replacement (Total or Hemiarthroplasty): Applied in acute cases where the femoral head is too damaged to repair, or for AVN or osteoarthritis that develops later on.

Prof. Dr. Murat Bozkurt is experienced in these complex hip traumas and the reconstructive surgeries (ORIF, replacement) that may be needed afterward.

Risks, Benefits, and Recovery Process

• Benefits (Timely Intervention +/- Surgery): Restoring joint congruity, relieving nerve compression, reducing AVN risk (through early reduction), stabilizing fractures, and enabling functional recovery.
• Risks:
  
  • Additional injuries caused by the trauma itself.
  • Risk of additional bone damage during reduction (rare).
  • General risks related to surgery (infection, bleeding, DVT/PE, anesthesia).
  • Specific Risks:
    
    • Avascular Necrosis (AVN): The most important late complication after hip dislocation. It is the death and collapse of bone resulting from disrupted blood flow to the femoral head. The risk increases with the duration and severity of the dislocation. Symptoms may appear months or years later.
    • Post-traumatic Osteoarthritis: Cartilage damage occurring at the time of injury can lead to osteoarthritis of the hip joint in later years.
    • Sciatic Nerve Damage: More commonly seen with posterior dislocations; usually a temporary injury due to stretching, but it can be permanent.
    • Recurrent Instability (rare).
    • Heterotopic Ossification (abnormal bone formation around the joint).
• Recovery Process: Highly variable, and largely dependent on the presence of accompanying fractures and the surgery performed.
  
  • If Only Closed Reduction Was Performed: Function is usually regained with protected weight-bearing on crutches for a few weeks, followed by physical therapy. However, long-term follow-up is required due to the risk of AVN.
  • If Surgery (ORIF, Replacement, etc.) Was Performed: The recovery process follows the protocol of the surgery performed. After fracture fixation, a prolonged period of non-weight-bearing (6-12 weeks or more) is usually required. Earlier weight-bearing may be allowed after hip replacement. In every case, comprehensive, long-term physical therapy is essential. Full recovery and return to activity takes months.

Surgical Treatment After Hip Dislocation in Ankara and Prof. Dr. Murat Bozkurt’s Approach

Traumatic hip dislocations are serious injuries requiring emergency intervention and specialized orthopedic follow-up afterward. In Ankara, Prof. Dr. Murat Bozkurt places importance on the following steps in his approach to such cases:

• Awareness of Urgency: He is aware that hip dislocation is an emergency and that reduction as soon as possible is important.
• Detailed Post-Reduction Evaluation: He recognizes the critical role of CT scanning after reduction in detecting accompanying fractures and loose bodies, and evaluates accordingly.
• Correct Surgical Indication and Timing: He accurately identifies situations requiring surgery (irreducible dislocation, displaced fractures, loose bodies) and plans surgical intervention at the appropriate time.
• Expert Surgical Technique: When necessary, he performs open reduction, fixation of acetabular or femoral head fractures (ORIF), arthroscopic procedures, or hip replacement surgery using modern techniques.
• Long-Term Follow-Up: He emphasizes the importance of following patients over the long term, particularly for late complications such as AVN and post-traumatic osteoarthritis.

Traumatic hip dislocation is a serious injury requiring emergency intervention and careful follow-up. Although functional recovery is possible with early and correct treatment, regular medical follow-up is important due to long-term risks such as AVN and osteoarthritis. In Ankara, you can benefit from the expertise of Prof. Dr. Murat Bozkurt for hip dislocation or its complications.

For detailed information and an appointment, you can contact Prof. Dr. Murat Bozkurt at 0312 502 70 74.