Oishi K, Inoue R, Yamamoto Y, et al. - This study was intended to correlate radiographic and digital tomosynthesis assessments of early biological fixation of a cementless stem in primary total hip arthroplasty (THA) and to evaluate the factors correlated with early biological fixation. Researchers included a total of 73 individuals who had undergone THA using cementless short tapered-wedge stems. They conducted both radiography and digital tomosynthesis at 6 weeks and 3, 6, 12, and 24 months after surgery. At each postoperative period, the presence of spot welds was investigated to assess biological fixation between the stem and the femur. The results of this study exhibited that digital tomosynthesis detected biological fixation between the stem and femur earlier than radiography; biological fixation may seem within 3 months following surgery.