Abstract: A customized alignment system of the instruments used in total knee arthroplasty. The alignment system includes a fixed femoral guide and a tibial guide configured to adapt to the femur and the tibia, resting on these bones without invading the cartilage of the articular surfaces. The tibial guide and two joinable femoral guides that can be coupled to the fixed femoral guide allow performing bone perforations adequately arranged to allow subsequent placement of cutting guides for the placement of a conventional total knee prosthesis. The guides are designed from a preoperative bone model. The system provides a more precise alignment compared to other conventional techniques, avoids the use of intramedullary alignment and simplifies surgery for the placement of a total knee prosthesis.

Abstract: Customized alignment system of the instruments used in total knee arthroplasty. The alignment system comprises a fixed femoral guide (1) and a tibial guide (4) configured to adapt to the femur and the tibia, resting on these bones without invading the cartilage of the articular surfaces. The tibial guide (4) and two joinable femoral guides (2, 3) that can be coupled to the fixed femoral guide (1) allow performing bone perforations adequately arranged to allow subsequent placement of cutting guides for the placement of a conventional total knee prosthesis. The guides (1, 2, 3, 4) are designed from a preoperative bone model. The system of the invention provides a more precise alignment compared to other conventional techniques, avoids the use of intramedullary alignment and simplifies surgery for the placement of a total knee prosthesis.