Fractures of long bones can be successfully treated with plates, external fixators or a combination of these. In some cases, complications may occur. One of these is the plate breaking or losing its fixation power. As a result, the patient has to undergo surgery again. The study was carried out due to the problem that the plates used in long bone fractures may break or the screw loosening from the bone, because of the patient's heavy weight and movement before union. A replica of the bone is produced from the patient's computer tomography image, and a plate is applied on it, as in surgery. The implant was produced on the plated bone replica and printed from biocompatible material using a 3D printer. It has been proven by force tests that the strength of the plate with our implant is increased compared to only the plate applied bone replica. The implant can be designed according to the surgeon’s choice with his hands. The invention has been registered by the Turkish Patent Office and the evaluation of the PCT (European) application continues.