Evidence guide
Anterior vs posterior hip replacement
The anterior approach is often marketed as less invasive. Here's what randomized trials actually show when it's compared with the posterior and lateral approaches.
The short answer
- Dislocation and revision rates are similar between the anterior and posterior approaches.14,16
- The anterior approach tends to mean less pain in the first days and better function in the first weeks, but the difference fades by about three months.14,15
- It takes about 15 minutes longer and has a higher risk of nerve injury.15
- Your surgeon's experience with an approach matters more than which one it is.
The approaches
- Posterior (back): the most widely used approach worldwide. Some muscles at the back of the hip are detached and repaired.
- Lateral (side): reaches the hip through muscles on the outer side.
- Direct anterior (front): works between muscles at the front of the hip, often with the patient on a special table and with X-ray guidance.
What the trials show
| Outcome | Anterior compared with posterior or lateral |
|---|---|
| Early pain | Lower on day 115 |
| Early function | Better at 1 to 6 weeks; no difference by 3 months14,15 |
| Hospital stay | About a third of a day shorter vs posterior14,16 |
| Operating time | About 15 to 17 minutes longer14,15 |
| Nerve injury | Higher risk15 |
| Dislocation, revision, fracture | No clear difference14,16 |
What this means for you
All three approaches give good long-term results. Choose a surgeon you trust, ask which approach they use most and why, and ask whether you'll have hip precautions afterward.
Clinical detail
- Ang 2023 (24 RCTs, 2,010 patients): DAA operative time +17.4 min, LOS −0.33 days vs PA; HHS +8.0 at 6 weeks vs PA.14
- Liu 2025 (17 RCTs, 1,575 patients): nerve injury RR 7.37 (95% CI 2.52 to 21.51); no difference at 3 months in HHS.15
- Ghandour 2025 (27 studies, 44,477 patients): revision RR 0.90, dislocation RR 0.78, both not significant; incision about 34 mm shorter with DAA.16
Sources
- Ang JJM, et al. 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:10.1007/s00590-023-03528-8
- Liu R, et al. Comparative efficacy of direct anterior approach versus conventional surgical approaches in total hip arthroplasty: a systematic review and meta-analysis of randomized clinical trials. J Orthop Surg Res. 2025;20(1):837. doi:10.1186/s13018-025-06227-8
- 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:10.1016/j.jor.2025.06.007