Vigdorchik JM, Sharma AK, Elbuluk AM, et al. - This research was attempted to assess dislocation rates after primary total hip arthroplasty (THA) applying standard vs high offset femoral components and to determine how differences in offset affect an impingement-free range of motion in a stiff spine cohort using a novel impingement model. Between 2016 and 2018, researchers retrospectively examined a total of 12,365 patients undergoing THA to ascertain dislocation rates and utilization of standard versus high offset stems. A CT-based computer software impingement modeling system evaluated bony or prosthetic impingement during the simulated range of motion for 50 consecutive patients with spinal stiffness. The data highlighted that high offset stems facilitated greater ROM before bony impingement and resulted in lower dislocation rates in the impingement model. The surgeons should consider the use of high-offset stems and pay attention to offset restoration in the setting of high-risk THA due to spinal stiffness.