In recent years, the use of 3D technology in the medical field, especially in orthopedic surgery, has increased considerably. This valuable tool can be used both in preoperative planning and during the surgical procedure itself. The application of this technology may be of particular interest in osteotomy surgeries, both to correct rotational malalignment and to treat degenerative joint diseases. Achieving an ideal osteosynthesis that fits perfectly after correction of the bone deformity is very difficult, in spite of the advantage of customized guides. This is due to the deformity of the bone caused by the fracture callus. The use of technology and 3D printing makes it possible to plan the surgery with great precision as well as to design and manufacture personalized surgical material that fits the patient optimally, favoring implantation.