Hipbone prosthesis

A hipbone prosthesis, comprising:

• a prosthesis main body, the prosthesis main body being of an arched structure, the prosthesis main body comprising a first end portion and a second end portion, and the first end portion is configured to contact and match with a sacrum (1);
• and
• an acetabular cup (20) and a connecting device (30), the acetabular cup (20) being connected with the second end portion in a position adjustable manner via the connecting device (30), the hipbone prosthesis further comprises a screw-rod structure;
• the screw-rod structure comprises a connecting seat (62) and a rod body (63);
• the connecting seat (62) is connected with the prosthesis main body (10);
• the rod body (63) is fixed on the connecting seat (62);
• a screw hole (111) is formed in the first end portion (11);
• a screw seat is arranged in the screw hole (111);
• anti-dropping mechanism (70) is arranged on the prosthesis main body (10);
• the anti-dropping mechanism (70) is arranged between the prosthesis main body (10) and the connecting seat (62) in a clamping manner;
• and the anti-dropping mechanism (70) comprises a first anti-dropping tentacle (71) matched with a screw accommodated in the screw hole (111);
• the anti-dropping mechanism (70) further comprises an anti-dropping main body (72);
• the anti-dropping main body (72) is arranged between the prosthesis main body (10) and the connecting seat (62) in a clamping manner;
• the anti-dropping mechanism (70) further comprises a second anti-dropping tentacle (73);
• the first anti-dropping tentacle (71) and the second anti-dropping tentacle (73) are connected with the anti-dropping main body (72) and are extended outward;
• and a limiting sleeve (74) matched with the rod body (63) is arranged on the second anti-dropping tentacle (73).