Less periprosthetic bone loss following the anterolateral approach to the hip compared with the direct lateral approach.

Less periprosthetic bone loss following the anterolateral approach to the hip compared with the direct lateral approach. Acta Orthop. 2017 Oct 17;:1-6 Authors: Ugland TO, Haugeberg G, Svenningsen S, Ugland SH, Berg ØH, Hugo Pripp A, Nordsletten L Abstract Background and purpose - The loss of bone mineral in the proximal femur following hip arthroplasty may increase the fracture risk around uncemented stems. We hypothesized that the surgical approach to the hip might influence bone mineral changes around the femoral stem in patients with a femoral neck fracture (FNF). Patients and methods - This was a pre-specified subgroup analysis (n = 51) of an ongoing randomized trial (n = 120) in patients with FNF. Participants were allocated to an uncemented hemiarthroplasty inserted through a direct lateral (Hardinge) approach or an anterolateral (modified Watson-Jones) approach. The 51 patients (mean age 83 (70-90) years, 33 women) were measured by dual-energy X-ray absorptiometry (DXA) to assess changes in periprosthetic bone mineral density (BMD). Results - The mean change in total BMD differed between groups at 12 months in favor of the anterolateral group (4.8%, 95% CI 0.0-9.6; p = 0.05). DXA at 3 months displayed BMD loss in the proximal Gruen zones in the lateral group compared with the anterolateral group. Zone 1 (-5.0% vs. 2.7%), zone 2 (-4.3% vs. 4.1%), zone 6 (-6.5% vs. 0.0%) and zone 7 (-11% vs. -2.4%, all p < 0.05). Interpretat...
Source: Acta Orthopaedica - Category: Orthopaedics Authors: Tags: Acta Orthop Source Type: research