Fixing device for patella fracture

Abstract

The invention discloses a fixing device for a patella fracture. The fixing device comprises a strap-shaped knitting part and hollow screws. A traction needle is connected to at least one end of the strap-shaped knitting part. The hollow screws are arranged in reserved drill holes in the patella fracture. The strap-shaped knitting part penetrates into center holes of the hollow screws under driving of the traction needles and presses the patella fracture in an intersecting mode. The fixing device has excellent biocompatibility, stimulation on the implanting position from the implantation material is avoided, and the problem that the implantation material needs to be taken out through a secondary operation is solved; the strap-shaped knitting part has low elasticity modulus, the screws have a dynamic pressurizing characteristic, blood supply to the fixed part is effectively protected while efficient fixing is provided, postoperative pain of a patient is relieved, and the rehabilitation period of the patient is shortened; the strap-shaped knitting part provides an effective fixing mode for the slight comminuted patella fracture.

Description

technical field [0001] The invention relates to the technical field of medical device design, in particular to a fixation device for patella fractures. Background technique [0002] The patella is the largest sub-bone of the human body, located in front of the knee joint, and has the function of protecting the knee joint. The articular surface behind the patella is opposite the trochlear surface of the femur. The quadriceps muscle is attached to the upper edge of the patella, and part of the fascia continues through the front of the patella to form the patellar ligament and inserts on the tibial tubercle. The patella plays a vital role in the movement of the human knee. For example, as an intermediate structure of the knee extension device, it transmits the pulling force generated by the quadriceps muscle to the patellar tendon; the patella acts as a lever when extending the knee, which can effectively Increase the leverage arm of the knee extension device to the flexion a...

AI Technical Summary

Problems solved by technology

[0005] However, there are some clinical defects in the hollow nail tension band method: first, the hollow nail stimulates the surrounding soft tissue to cause pain, the hollow nail breaks and becomes loose, and the stimulation of the knotted part of the steel wire after the operation causes discomfort to the patient; The internal fixation is taken out in the second operation; the third is that the contact area between the linear fixation belt and the patella bears a large pressure per unit area, which will lead to soft tissue necrosis, liquefaction, absorption, and fibrosis, which will loosen the tension band steel wire; and the fourth is that it is difficult to fix comminuted fractures

Images