A patient-specific surgical guide for performing a total prosthetic knee revision, comprising: a femoral component configured to exclusively couple with the distal end of a femur bearing a femoral prosthesis attached to a femoral bone part; wherein the femoral component has: a distal portion configured to face the distal end of the femur, bearing at least two distal positioning holes (28, 29) configured to face a distal region of the femoral prosthesis when the femoral component is coupled with the distal end of the femur; a frontal portion extending on the continuation of the distal portion and displaying a first abutment area configured to act in abutment against the femur bone part in a cortical frontal region of the femur, and a second area configured to face a frontal region of the femoral prosthesis, when the femoral component is coupled with the distal end of the femur; wherein the frontal portion has: at least two guide holes, extending parallel to each other through the frontal portion at the first abutment area; at least two frontal positioning holes extending through the frontal portion at the second area. a femoral component configured to exclusively couple with the distal end of a femur bearing a femoral prosthesis attached to a femoral bone part; wherein the femoral component has: a distal portion configured to face the distal end of the femur, bearing at least two distal positioning holes (28, 29) configured to face a distal region of the femoral prosthesis when the femoral component is coupled with the distal end of the femur; a frontal portion extending on the continuation of the distal portion and displaying a first abutment area configured to act in abutment against the femur bone part in a cortical frontal region of the femur, and a second area configured to face a frontal region of the femoral prosthesis, when the femoral component is coupled with the distal end of the femur; wherein the frontal portion has: at least two guide holes, extending parallel to each other through the frontal portion at the first abutment area; at least two frontal positioning holes extending through the frontal portion at the second area. a distal portion configured to face the distal end of the femur, bearing at least two distal positioning holes (28, 29) configured to face a distal region of the femoral prosthesis when the femoral component is coupled with the distal end of the femur; a frontal portion extending on the continuation of the distal portion and displaying a first abutment area configured to act in abutment against the femur bone part in a cortical frontal region of the femur, and a second area configured to face a frontal region of the femoral prosthesis, when the femoral component is coupled with the distal end of the femur; wherein the frontal portion has: at least two guide holes, extending parallel to each other through the frontal portion at the first abutment area; at least two frontal positioning holes extending through the frontal portion at the second area. at least two guide holes, extending parallel to each other through the frontal portion at the first abutment area; at least two frontal positioning holes extending through the frontal portion at the second area.