Direct Anterior Hip Replacement
Patient information — Dr Christopher Spelman, Orthopaedic Surgeon
Overview
A hip replacement can be performed through several different approaches — different routes through the muscles and soft tissues to reach the joint. The implant that goes in is generally the same. What differs is how the surgeon gets there.
The direct anterior approach (DAA) reaches the hip from the front, working between muscles rather than cutting through them. The posterior approach reaches it from behind, and is the most widely used technique worldwide.
Dr Spelman performs direct anterior hip replacement and will discuss whether it is the right choice for you. That decision depends on your anatomy, your build, any previous surgery, and the specific problem being treated — not on a general belief that one approach is better than another.
What the operation involves
Through an incision at the front of the hip, the surgeon works in the natural interval between two muscle groups. The worn femoral head is removed and replaced with a metal or ceramic ball on a stem inserted into the femur, and the socket is resurfaced with a metal shell and a bearing liner.
The approach is usually performed with the patient on their back, which allows X-ray imaging during the operation to check component position and leg length.
What the evidence actually shows
This is an area where marketing has run somewhat ahead of the data, so it is worth being precise.
Early recovery is modestly better. A meta-analysis restricted to randomised controlled trials — 24 studies, 2,010 patients — found the direct anterior approach produced significantly better Harris Hip Scores at six weeks compared with the posterior approach, and a shorter hospital stay by around a third of a day (Ang et al., 2023). A separate meta-analysis of randomised trials found less early post-operative pain and earlier discontinuation of walking aids (Yang et al., 2020).
That advantage does not persist. By later follow-up, functional scores converge. A 2025 meta-analysis of 27 studies including 44,477 patients found no significant difference in Harris Hip Score between the approaches (Ghandour et al., 2025).
Major complication rates are broadly similar. That same large analysis found no significant difference in all-cause revision, dislocation, intraoperative fracture or periprosthetic fracture (Ghandour et al., 2025). Ang et al. likewise found no difference in dislocation, periprosthetic fracture or venous thromboembolism (Ang et al., 2023).
Not every study agrees. A stratified meta-analysis of 30 trials including 11,562 patients reported higher overall complication rates, higher revision rates and more wound complications with the anterior approach, and concluded the posterior approach may be the safer option (Awad et al., 2022). This finding sits against the majority of the recent literature, but it is a legitimate result from a large dataset and you should know it exists.
One difference is consistent and worth understanding: numbness at the front of the thigh. The lateral femoral cutaneous nerve runs close to the anterior approach and is more often irritated or injured. One meta-analysis of randomised trials put the relative risk at around 39 times higher than the posterior approach (Yang et al., 2020). It is usually a patch of altered sensation rather than weakness, it does not affect how the hip works, and it often improves — but it can be permanent.
Component positioning may be more accurate. More acetabular components fell within the accepted safe zone with the anterior approach in the same analysis (Yang et al., 2020).
The operation usually takes longer, by around 17 minutes on average (Ang et al., 2023).
The honest summary
The direct anterior approach offers a real but modest advantage in the first weeks — less early pain, walking aids discarded sooner, a slightly shorter hospital stay — and equivalent results by a year. It carries a higher rate of thigh numbness. Serious complication rates appear comparable, though not every study agrees.
The most reliable conclusion in this literature is the one the authors themselves reach: the choice of approach should be guided by surgeon experience and patient factors, not by the approach itself (Ang et al., 2023). A surgeon who performs a technique regularly and well will produce better results with it than a surgeon who does not, whichever technique that is.
Risks
The direct anterior approach carries the risks common to all hip replacement — infection, dislocation, blood clots, leg length difference, periprosthetic fracture, loosening over time, and the need for revision — plus:
• Lateral femoral cutaneous nerve injury — numbness over the outer or front thigh, more common than with posterior approaches, sometimes permanent
• Wound healing problems — the incision sits in a skin crease, which can be a factor for some patients
• Intraoperative femoral fracture — the femur is more difficult to access from the front
Who it suits
In general terms, anterior hips are better suited to slim individuals with smaller thigh muscle bulk and less severe deformities.
References
Retrieved from PubMed.
1. Ang JJM, Onggo JR, Stokes CM, Ambikaipalan A. Comparing direct anterior approach versus posterior approach or lateral approach in total hip arthroplasty: a systematic review and meta-analysis. Eur J Orthop Surg Traumatol. 2023;33(7):2773–2792. DOI
2. Ghandour M, et al. Direct anterior approach versus posterior approach in total hip arthroplasty: A systematic review and meta-analysis. J Orthop. 2025;65:233–250. DOI
3. Yang XT, Huang HF, Sun L, Yang Z, Deng CY, Tian XB. Direct anterior approach versus posterolateral approach in total hip arthroplasty: a systematic review and meta-analysis of randomized controlled studies. Orthop Surg. 2020;12(4):1065–1073. DOI
4. Awad ME, Farley BJ, Mostafa G, Darwiche HF, Saleh KJ. The risk of hospital readmission, revision, and intra- and postoperative complications between direct anterior versus posterior approaches in primary total hip arthroplasty. Hip Int. 2023;33(3):442–462. DOI