The present invention relates to a plate configuration for use in deformities that cause mechanical axis distortion caused by the knee joint in the medical field. In particular, the invention relates to a plate construction comprising a plate inclined in particular according to the designed form, holes drilled in it transversely, and supporting blocks, in particular triangular shaped, lying on the surface to which the bone is applied. The utility model file on the subject has been shared. With the clinical and biomechanical studies on the subject, it has been shown that sufficient stability is achieved with wedged plate application for fixation after proximal tibia medial open wedge osteotomy.