The invention discloses a
porous tantalum metal hollow screw which comprises a screw rod and a
screw cap. The screw rod and the
screw cap are integrally formed. A thread is arranged on the outer surface of the front end of the screw rod, and the length ratio of the thread and the screw rod is 1:1.7-2.3. The
screw cap is a conical screw cap with a cylindrical
screw head, an included angle between the
conical surface of the conical screw cap and the
central line of the screw rod ranges from 44 degrees to 46 degrees, grooves symmetric about the
central line of the screw rod are formed in the outer surfaces of the two sides of the cylindrical
screw head, the included angle between the two inclined faces of each groove is 60 degrees, a through hole is formed in the central axis of the screw rod, and a smooth sliding rod is arranged between the thread and the screw cap. By means of the structure of the hollow screw, screwing-in and firm fixation of the hollow screw are facilitated, secondary displacement at a
bone fracture part is avoided, the defect that the
tail part of the screw is deformed when the screw is screwed in is overcome, force can reach the front end uniformly, and the possibility of deformation and
cracking of the screw is reduced.