The utility model relates to the technical field of
medical instruments, and discloses a 3D printing
humerus prosthesis retaining a
shoulder joint, which comprises a
prosthesis body, the proximal end of the
prosthesis body is used for being connected with the
humerus head of the
shoulder joint, the proximal end of the prosthesis body is in a
bulb shape, the top of the proximal end of the prosthesis body is provided with a connecting area, and the connecting area is provided with a plurality of nail-shaped protrusions; a through nail hole is further formed in the near end of the prosthesis body, and the nail hole is perpendicular to the connecting area. The near end of the prosthesis body is in the ball
head shape, is provided with the connecting area and is connected with the
humerus head of the
shoulder joint, the shoulder joint can be reserved, the natural movement range and functions of a patient can be maintained, damage to surrounding tissue is reduced,
recovery of more natural movement and daily activities is facilitated, and postoperative functions are improved; the contact area of the
bulb-shaped connection is large, and the nail-shaped bulge structure is arranged in the near-end connection area of the prosthesis body, so that the contact area can be further increased, and the connection is more stable; and the initial and long-term stability of
prosthesis implantation is facilitated.