Nickel-titanium shape memory alloy patellar concentrator

Abstract

The invention discloses a nickel-titanium shape memory alloy patellar concentrator which comprises an annular patellar concentrator body, one or two bottom patellar claws and two or three sharp patellar claws, wherein each bottom patellar claw is arranged at the upper end of the patellar concentrator body and integrated with the same, each sharp patellar claw is arranged at the lower end of the patellar concentrator body and integrated with the same, and a sharp hook pointing at the patellar concentrator body is arranged at the free end of each of the bottom patellar claws and the sharp patellar claws. The patellar concentrator bulges and deforms towards the left and the right after restoring to an original shape, and cutaneous necrosis caused by gaps reserved between the patella and the skin resulting from upward bulging and deformation of the waist in the existing design is avoided; and fixation area can be expanded by the annular patellar concentrator body, the annular waist can press bone blocks prone to displacement in the condition of patellar surface fracture, reduction of fracture is facilitated, and strength of the patellar concentrator body is enhanced.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a nickel-titanium shape memory alloy patella concentrator. Background technique [0002] see Figure 1a and Figure 1b , the figure shows the currently commonly used patella collector 1, usually using nickel-titanium shape memory alloy material, the patella collector 1 includes a patella collector main body 12, the upper end of the patella collector main body 12 is provided with an integral molding One or two patella bottom claws 11, the lower end of the patella concentrator main body 12 is provided with two or three patella claws 13 integrally formed with it, and the free ends of the patella bottom claws 11 and patella claws 13 are provided with There is a sharp hook pointing to the main body 12 of the patella collector, and the existing patella collector 1 is divided into three specifications: large, medium and small. [0003] However, it is still found in clinical ap...

AI Technical Summary

Problems solved by technology

[0004] 1) if figure 2 As shown, in the existing patella concentrator 1, after the fracture of the patella is aggregated, the main body 12 of the patella concentrator bulges, so that the skin is completely separated from the patella, which is likely to cause skin necrosis

[0005] 2) For cases where the middle and lower parts of the patella are comminuted, it is difficult to aggregate and reduce

[0006] 3) Use a small patella concentrator 1, although it can make the patella concentrator and the patella fit better, but the mechanics are not emphasized enough, and the fracture end may be displaced when the knee joint is flexed or extended

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