Acetabular reconstruction prosthesis with piling-cup system

An acetabular reconstruction prosthesis with a piling-cup system, comprising an iliac posterior pile screw (1), an iliac anterior pile screw (2), a pubic pile screw (3), an ischial pile screw (4), abutments (5), a 3D-printed porous titanium mesh acetabular cup (6), locking screws (7), nuts (8), and tail cap screws (9);

• the iliac posterior pile screw (1), the iliac anterior pile screw (2), the pubic pile screw (3), the ischial pile screw (4) are sized and configured to be implanted into an acetabular wall according to anatomical structure of pelvis, wherein the iliac posterior pile screw (1) faces posterior of ilium, the iliac anterior pile screw (2) faces iliac tubercle, the ischial pile screw (4) is sized and configured to run along ischium ramus, and the pubic pile screw (3) is sized and configured to run along pubic ramus;
• a pile seat (12) of the ischial pile screw (4) is inserted into a central screw hole (51) of a respective abutment (5) of the abutments (5) and fixed by a respective nut (8) of the nuts (8), respectively;
• wherein each abutment (5) of the abutments (5) is disc-shaped and is fixed to the pile seat (12) by the respective nut (8), and an upper surface of each abutment (5) completely fits an outside surface of the 3D-printed porous titanium mesh acetabular cup (6);
• wherein a left screw hole (52), a front screw hole (53), a rear screw hole (54) and a right screw hole (55) for fixing the 3D-printed porous titanium mesh acetabular cup (6) by the locking screws (7) are formed around the central screw hole (51) of each abutment (5);
• wherein the 3D-printed porous titanium mesh acetabular cup (6) is fixed to the respective abutment (5) by a respective tail cap screw (9) of the tail cap screws (9), and fixation is reinforced by four locking screws (7) around the respective tail cap screw (9).