Hoch A, Jud L, Roth T, et al. - The present study was performed to explore a real 3D measurement technique for the tibial slope: differentiation between different articular surfaces and comparison to radiographic slope measurement. Researchers enrolled CT scans of 54 knees in 51 patients (41 males and 10 females) with a mean age of 46 years (range 22–67 years). They used a novel 3D measurement technique by two readers to assess the tibial slope of medial and lateral tibial plateau and rim. They performed a statistical analysis to ascertain the intraclass correlation coefficient for the new technique and compare it to a standard radiographic measurement. The results of this study indicate that the proposed novel measurement technique exhibits a high intraclass agreement and offers an applicable opportunity to evaluate the tibial slope three-dimensionally. Moreover, it was demonstrated that the medial and lateral articular surfaces can be assessed separately and one can differentiate the slope from the plateau and from the rim. The measurement technique might deliver a beneficial supplement to the standard radiographic assessment in slope related knee surgery, as three-dimensional planning becomes successively more important.