Patella star-type steel plate

Abstract

The invention discloses a patella star-type steel plate which comprises mutually connected screw hole rings in star-type arrangement. The screw hole rings include two first screw hole rings arranged into a triangular structure, the two first screw hole rings are arranged on the left side and the right side and include two second screw hole rings and third screw hole rings lower than the second screw hole rings, the third screw hole rings and the second screw hole rings on the same side are connected through a straight rod, the left and right corresponding second screw hole rings are connectedby an inward bent arc-shaped rod, a fourth screw hole ring is arranged on the inner side of the arc-shaped rod and connected with the arc-shaped rod through a second outward arched arc-shaped connecting rod, a first fixed jaw is arranged on an outer straight rod, and a second fixed jaw is arranged on the arc-shaped rod. The characteristics of patella are combined, various advantages of a kirschnerwire tension band, a hollow screw and a patella collector are integrated, mechanics principles are more effectively met, the principle of the tension band is met, and a more effective method is provided for treating patella fracture.

Description

technical field [0001] The invention relates to a steel plate, in particular to a patella star-shaped steel plate. Background technique [0002] Patella fractures account for 0.5%-1.5% of fractures in all parts of the body. Patella fractures are intra-articular fractures. Improper treatment will seriously affect the function of the knee joint. Patella fractures with a displacement of more than 2 mm should be actively treated with surgery. Surgery should strive for anatomical reduction, strong internal fixation, and early functional exercise to restore knee joint function and reduce traumatic arthritis. Recognized treatment principles for patella fractures: (1) Retain the patella. (2) Anatomical reduction to ensure smooth articular surface. (3) Strong fixation, so that the fracture end can promote bone growth in a stable environment; (4) Early exercise, to maximize the recovery of knee joint function. If the effect of surgical reduction and fixation is not good, the articu...

AI Technical Summary

Problems solved by technology

It is limited to non-displaced fractures, and because plaster or braces are generally fixed for 4-6 weeks, the knee joint on the affected side will cause stiffness and stiffness, which will seriously affect the function of the knee joint

[0005] There are many problems in traditional surgery for patella fractures: traditional internal fixation is difficult to meet the biomechanical requirements; the fixation used in traditional internal fixation has a large volume, which is easy to damage the soft tissue near the knee fracture; Surface stress shielding can easily lead to poor fracture healing or long-term osteoporosis; traditional internal fixation can easily cause bursitis, local pain, skin and soft tissue damage, etc.

Moreover, if the two titanium cables cannot be tightened at the same time, the tightening force of the two titanium cables will be unbalanced and the purpose of compressing and fixing the fracture fragment will not be achieved. At the same time, the two titanium cables should not be tightened too much, especially for comminuted fractures. , which can lead to excessive compression of the fracture fragments, resulting in the formation of steps on the articular surface or displacement of the fracture fragments, resulting in traumatic arthritis

[0010] Based on the above shortcomings, and there is no patella plate in clinical orthopedic work at present, there is an urgent need for a patella plate that combines the advantages of the above methods and can avoid its shortcomings.

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