Early Outcomes following Minimally Invasive Total Hip Arthroplasty Using a two-Incision Approach versus a Mini-Posterior Approach

We evaluated early clinical results and radiographic findings of MIS THA using 2-incsion approach and mini-posterior approach. A consecutive series of 35 patients (40 hips) with 2-incision THA and a consecutive series of 35 patients (36 hips) with mini-posterior THA performed in the same period were evaluated. The patient groups were not randomised. At the mean follow-up of 20.2 months (range, 12–36 months), the 2-incision group had significantly earlier ambulation, driving ability and return to work. However, it had significantly more operative time, blood loss, blood transfusion and complications. Regarding radiographic findings of 2-incision group and mini-posterior group, the mean radiographic acetabular abduction of was 46.7 degrees (89% was within 35–55°) and 44.8 degrees (84% was within 35–55°), respectively. The femoral stem was in neutral position in 80% and 83%, respectively. There was no statistical difference of the implant position between groups. Although MIS 2-incison THA provided faster, early ambulation than the mini-posterior THA, surgeons have to weigh the advantages and disadvantages of this technique including, increased operative time, blood loss and their familiarity with similar standard incisions and landmarks.