Direct Anterior Hip Replacement: Modern Muscle-Sparing Approach
Total hip replacement has evolved significantly over the past several decades. While posterior and lateral approaches remain highly successful, the direct anterior approach (DAA) has become increasingly popular because it allows the surgeon to reach the hip through a natural interval between muscles and facilitates the use of real-time X-ray imaging during surgery.
The anterior approach itself is not new. Its principles have been used for decades, but advances in surgical technique, specialized operating tables, instrumentation, anesthesia, and rapid-recovery protocols have made it increasingly practical for modern hip replacement surgery.
Its adoption has grown substantially. A 2018 survey of 996 members of the American Association of Hip and Knee Surgeons (AAHKS) found that 56.2% of responding surgeons were performing direct anterior hip replacement.[1] More recent AAHKS practice data reported that the direct anterior approach had become the most commonly utilized approach for primary total hip replacement among surveyed surgeons—56% anterior compared with 37% posterior and 7% anterolateral.
Clinical Advantages
One of the principal advantages of the direct anterior approach is that it is muscle-sparing. Rather than routinely cutting through major muscles to reach the hip, the surgeon works through a natural interval between muscle groups.
Research comparing the anterior approach with other approaches has demonstrated potential advantages during the early recovery period, including less early postoperative pain and faster early functional recovery.These early benefits may help patients walk sooner and return to normal activities and work more quickly. However, long-term outcomes are generally excellent with several properly performed hip replacement approaches.
Another potential advantage is a low risk of postoperative hip dislocation. Some studies have reported lower dislocation rates with the anterior approach. However, the evidence is not completely uniform, and recent meta-analysis has not demonstrated a statistically significant difference in dislocation compared with the posterior approach. Therefore, surgical technique, implant positioning, patient factors, and surgeon experience remain extremely important.
How Is Direct Anterior Hip Replacement Performed?
During direct anterior hip replacement, the patient is positioned on their back, or supine. In my practice, I use a specialized operating table called the HANA® table, which is designed to facilitate anterior hip replacement. The table allows controlled positioning and manipulation of the leg, making it easier to safely expose both the hip socket and the femur.
After the skin incision is made, much of the deeper dissection is performed bluntly using the surgeon’s fingers to gently separate the natural interval between muscles rather than cutting through the major muscles surrounding the hip. Specialized retractors and instruments are then used to perform the hip replacement through this muscle-sparing exposure.
One of the most important advantages of performing the procedure in the supine position is the ability to use real-time X-ray, or fluoroscopy, during surgery. Attached intraoperative X-ray imaging shows appropriate implant and assess the size, position and angle of the acetabular cup, alignment of the femoral implant, hip offset, and leg length. Post operative image shows perfect alignment of total hip implant.
For me, the combination of a muscle-sparing surgical approach, supine positioning, specialized HANA table and instruments, and real-time X-ray guidance provides an excellent approach to hip replacement for appropriately selected patients. The goal is not simply to make a smaller incision—it is to perform an accurate hip replacement while minimizing unnecessary soft-tissue trauma and helping patients achieve a safe, comfortable, and rapid recovery.
References
- Patel NN, Shah JA, Erens GA. Current Trends in Clinical Practice for the Direct Anterior Approach Total Hip Arthroplasty. Journal of Arthroplasty. 2019. Survey of 996 AAHKS members; 56.2% of respondents reported performing direct anterior THA.
- Courtney PM, et al. Current Practice Trends in Primary Hip and Knee Arthroplasties Among Members of the American Association of Hip and Knee Surgeons. Journal of Arthroplasty. 2023. Direct anterior approach was reported as the most utilized approach for primary THA among survey respondents (56%).
- Meermans G, Konan S, Das R, Volpin A, Haddad FS. The Direct Anterior Approach in Total Hip Arthroplasty: A Systematic Review of the Literature. Bone & Joint Journal. 2017;99-B(6):732-740.
- Wang Z, Hou JZ, Wu CH, et al. A Systematic Review and Meta-analysis of Direct Anterior Approach Versus Posterior Approach in Total Hip Arthroplasty. Journal of Orthopaedic Surgery and Research. 2018;13:229.
- Putananon C, et al. Comparison of Direct Anterior and Lateral Approaches in Total Hip Arthroplasty: A Systematic Review and Meta-analysis. Medicine (Baltimore). 2015;94(50).
- Direct Anterior Approach Versus Posterior Approach in Total Hip Arthroplasty: A Systematic Review and Meta-analysis. Meta-analysis of 27 studies involving 44,477 patients. The pooled dislocation risk was numerically lower with DAA (RR 0.78) but did not reach statistical significance.
- Post ZD, Orozco F, Diaz-Ledezma C, Hozack WJ, Ong A. Direct Anterior Approach for Total Hip Arthroplasty: Indications, Technique, and Results. Review of surgical technique including supine positioning and use of specialized HANA/fracture tables.
- Slotkin EM, Patel PD, Suarez JC. Accuracy of Fluoroscopic Guided Acetabular Component Positioning During Direct Anterior Total Hip Arthroplasty. 2015. Study of 780 procedures demonstrating the utility of intraoperative fluoroscopy for assessing acetabular component orientation.
- Anatomic Total Hip Component Position Is More Reproducible With the Direct Anterior Approach Using Intraoperative Fluoroscopy. Study evaluating component positioning with supine DAA performed on a HANA table with fluoroscopic guidance.
- Fluoroscopy-Guided Direct Anterior Approach Total Hip Arthroplasty Provides More Accurate Component Positions in the Supine Position Than in the Lateral Position. 2023. Demonstrated greater consistency between intraoperative and postoperative measurements of component orientation, offset, and leg length with supine fluoroscopic DAA.