Anterior Approach Hip Replacement

There are several ways to successfully “approach” the hip joint to allow for successful hip replacement surgery. The most common are the anterior and posterior approaches. Direct anterior hip replacement surgery involves making an incision in the front of the hip (just inside of where a pocket might be on your pants). This approach is a muscle sparing approach and is performed with the patient lying on their back facing up. The two muscles beneath the skin are then separated, but not cut and then stretched slightly with special instruments (retractors) to see the hip joint. The hip joint can then be fully accessed to perform the actual replacement. Preoperative digital templating can be utilized with an anterior approach surgery. Either a live x-ray (fluoro scanner) or other technology (robotics/VR technology) can be utilized with this approach during the procedure to allow for additional accuracy and precision in placement of the implants. Advantages of an anterior approach can include: less time needed to use assistive devices (walker/cane) after the surgery, improved early functional abilities, and enhanced early postoperative stability.

Anterior Hip Replacement Advantages:

  • Less invasive and muscle sparing
  • Decreased dislocation potential
  • Live x-ray can enhance accuracy in placement of components

Less Invasive and Muscle Sparing

The anterior approach is a single incision, muscle sparing total hip replacement approach. With the anterior approach, your surgeon can work between your muscles and tissues without detaching them from the hip or thigh bones.

Decreased Dislocation Potential

Generally speaking, an anterior approach is inherently more stable than a posterior approach. A recent study in the Journal of Bone and Joint Surgery reported that the most common reason for revision (redo) of a hip replacement is for dislocation (where the ball pops out of the socket requiring a physician to put it back in place). The majority of dislocations are in a posterior direction. Although experienced hip surgeons may have a very low dislocation rate with a posterior approach, an anterior approach avoids violating the posterior structures altogether. This potentially allows for a lower dislocation risk. In fact, our patients are not given any “hip precautions” (restrictions of certain positions) following an anterior approach allowing for a more straightforward and potentially faster recovery.

Live Xray (Flouroscopy)

The anterior technique allows for use of a live mobile x-ray (fluoroscope) during the procedure. This device enables your surgeon to not only visualize the components by direct vision, but also visualize the hip replacement with an x-ray to ensure that appropriate sizing and position of all components has been achieved.

The fluoroscope also allows your surgeon to compare one hip to the other with increased ability to measure for correct limb lengths. One of the most common problems we encounter in hip replacement is limb length inequality. Although not foolproof, an intraoperative live xray comparison before the surgery is completed can enhance the accuracy of this measurement.

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