Outcome and Prognosis
Factors in the injury pattern affecting prognosis include the following:
- Force of energy - High- versus low-energy trauma
- Location - Instability allowed with superior roof, posterior wall, and column fractures
- Degree of articular comminution of both the acetabulum and the femoral head
- Degree of initial displacement
- Associated injuries
Treatment factors affecting the prognosis are the quality of the reduction, which ideally restores congruity, and the quality of fixation, which ideally restores stability.
The prognosis can also be affected by complications such as the following:
- Avascular necrosis
- Metal in the joint
- Chondrolysis
- Sepsis
- Heterotopic ossification
- Neurovascular injury
Studies have confirmed the positive association between the accuracy of reduction and a better long-term result.8,60 However, many series have shown that, even when these goals are achieved, posttraumatic arthritis still occurs in up to 30% of patients.6,8,61,62,63 Contributing factors may include an imperfect reduction, osteochondral defects in either the acetabulum or the femoral head, chondrolysis due to articular trauma at the time of injury, and AVN of the femoral head or the acetabulum. Once symptomatic posttraumatic arthritis has developed, options for salvage generally are limited to total hip arthroplasty and arthrodesis.
Future and Controversies
Technique development
As techniques continue to develop and improve, imaging is being used more and more in the treatment of acetabular fractures. Brown et al have reported the use of computer-generated 3-D CT moving images for preoperative planning and screw/pin insertion and use of stereolithography (wax or plastic 3-D model of bony anatomy) to develop a computer-generated "clip on" interpositioning template for accurate placement of plate and screws. These new technologies provide the surgeon with precise information about the fracture patterns and allow effective preoperative planning and accurate fixation of acetabular fractures.64 Citak et al have reported on virtual 3-D planning of acetabular fracture reduction.65
Prophylaxis controversies
The best modality of preoperative DVT prophylaxis remains controversial; multiple options are available, but the current trend is to use sequential compression devices for prophylaxis in the preoperative period.
Similarly, the best form of prophylaxis against heterotopic ossification remains controversial; however, indomethacin appears to be used most frequently at present.
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Further Reading
Related eMedicine topics
Acetabulum, Fractures (Radiology)
Acetabular Wear in Total Hip Arthroplasty
Femoral Osteotomy
Femoral Head Avascular Necrosis
Intertrochanteric Hip Fractures
Subtrochanteric Hip Fractures
Clinical guidelines
ACR Appropriateness Criteria® developmental dysplasia of the hip. American College of Radiology - Medical Specialty Society. 1999 (revised 2005). 8 pages. [NGC Update Pending] NGC:004788
ACR Appropriateness Criteria® imaging after total hip arthroplasty (THA). American College of Radiology - Medical Specialty Society. 1998 (revised 2005). 8 pages. NGC:004649
ACR Appropriateness Criteria® chronic hip pain. American College of Radiology - Medical Specialty Society. 1998 (revised 2003). 6 pages. [NGC Update Pending] NGC:003896
Clinical studies
Role of Vacuum Assisted Closure (VAC) Device in Postoperative Management of Pelvic and Acetabular Fractures
Multi-Center Comparative Trial of the ASR™-XL Acetabular Cup System vs. the Pinnacle™ Metal- on- Metal Total Hip System
Unipolar or Bipolar Hemiarthroplasty in the Treatment of Displaced Femoral Neck Fractures. A Randomized Trial of RSA Measurements of Acetabular Wear
Keywords
acetabulum fractures, acetabulum trauma, acetabular trauma, femur trauma, femoral trauma, fractures of the hip socket, intra-articular fractures of the hip, hip fracture, broken hip, hip pain, Arbeitsgemeinschaft für osteosynthesefragen–Association for the Study of Internal Fixation, AO-ASIF, femoral head fractures, femoral neck fractures, intertrochanteric fractures, trochanteric fractures, subtrochanteric fractures, hip joint, iliofemoral ligament, pubofemoral ligament, ischiofemoral ligament, intracapsular fracture, extracapsular fracture, anterior dislocation, posterior dislocation, single fragment fracture, comminuted fracture, stress fracture, incomplete fracture, impacted fracture, partially displaced fracture, completely displaced fracture, single fracture lines,multiple fracture lines, nondisplaced fracture
Follow-up: Acetabulum Fractures