Cementless Tapered Wedge Femoral Stems Decrease Subsidence in Obese Patients Compared to Traditional Fit-and-Fill Stems

摘要: Abstract Background Femoral component stability and resistance to subsidence is critical for osseointegration clinical success in cementless total hip arthroplasty. The purpose of this study was radiographically evaluate the anatomic fit 2 different proximally tapered, porous-coated modern femoral designs. Methods A retrospective cohort 126 consecutive arthroplasties performed. Traditional fit-and-fill stems were implanted first 61 hips with remaining 65 receiving morphometric tapered wedge stems. Preoperative bone morphology assessed by canal flare index. Canal fill coronal plane, subsidence, sagittal alignment measured digitally on immediate 1-month postoperative radiographs. Results Demographics indices similar between groups. percentage greater compared stem ( P  = .001). There significantly less design (0.3 mm) (1.1 Subsidence increased as body mass index (BMI) stems, a finding not observed .013). Conclusion An anatomically designed demonstrated axial decreased increasing BMI than traditional stem. irrespective BMI, likely due inherent may be optimal obese patients.