Brenneis M, Braun S, van Drongelen S, et al. - In this study, the accuracy and reliability of three-dimensional (hipEOS) and common digital two-dimensional (TraumaCad) templating were compared with special focus on stem morphology. Researchers randomized a total of 51 patients who had undergone THA into two groups. They conducted preoperative planning on 23 patients with hipEOS (3D) and on 28 patients with TraumaCad (2D) planning software. They compared planning results with the implanted component size. They further recorded inter- and intraobserver reliability as well as planning accuracy of both planning methods with a special focus on straight and short stem design. The data imply that 3D templating with hipEOS software has good overall reliability and may have a better planning accuracy of short stem prostheses than digital templating with TraumaCad software. The results of this study demonstrate that assuming that the number of implanted short stem prostheses will further increase in the coming years, more precise planning with the 3D technique can contribute to improve surgical outcomes.