Tehran University of Medical Sciences Journal of Orthopedic and Spine Trauma 2538-2330 9 4 2023 12 30 160 3 Mazaher Ebrahimian Tehran University of Medical Sciences Mir Mansour Moazen Jamshidi Zanjan University of Medical Sciences Behzad Enayati Arak University of Medical Sciences Amir Reza Mafi Tehran University of Medical Sciences Amir Hosein Mafi Joint Reconstruction Research Center, Tehran University of Medical Sciences Alireza Moharrami Joint Reconstruction Research Center, Tehran University of Medical Sciences 2022 08 16 2023 12 30 Kienbock disease (KD) was described by Robert Kienbock in 1910 as osteomalacia of the lunate. A century has passed since the first description of KD, and numerous theories, classifications, and treatments have been published for achieving the best outcomes for this disease, but the treatments remain controversial among surgeons. Various classifications have been proposed for KD based on radiography, magnetic resonance imaging (MRI), arthroscopy, and morphology from 1947 to 2017. Recently, the pioneers of KD (Lichtman and Bain) proposed a new classification based on all the previous classifications (radiography, MRI, and arthroscopy). This classification seems to be the best evaluation and treatment method for KD. We recommend using this new classification for the assessment of KD. https://jost.tums.ac.ir/index.php/jost/article/view/416 https://jost.tums.ac.ir/index.php/jost/article/download/416/336