Antibiotic bone cement intramedullary nail provided with steel wire woven core as well as manufacturing method and manufacturing die of antibiotic bone cement intramedullary nail

Abstract

The invention discloses an antibiotic bone cement intramedullary nail provided with a steel wire woven core as well as a manufacturing method and a manufacturing die to the antibiotic bone cement intramedullary nail. The core of the bone cement intramedullary nail is formed by weaving three steel wires and is manufactured by virtue of the die through integral molding. With the adoption of the special die and by using a bone cement import technology under negative pressure, the standard manufacturing of the antibiotic bone cement nail can be further achieved. Nails, which are different in diameter, can be manufactured, and moreover, since the inner wall of the die is smooth and the bone cement is free from adhesion with teflon, the bone cement intramedullary nail, which is provided with a smooth surface, can be easily taken out of the die, so that the bone cement intramedullary nail is quite convenient to use.

Description

technical field [0001] The invention belongs to the field of medical equipment, in particular to a braided steel wire inner core antibiotic bone cement intramedullary nail, a preparation method thereof and a mold for making the same. Background technique [0002] The result of infection after tubular intramedullary nailing of the lower extremities is catastrophic, which can cause infection of the whole medullary cavity of the femur or tibia, and is extremely difficult to treat. At present, the more effective method is to insert bone cement beads containing antibiotics into the medullary cavity, and use the antibacterial drug carrier to control infection. However, external fixation is often required due to infectious nonunion, and the nursing is extremely inconvenient. Some authors inserted a single Kirschner wire wrapped with bone cement into the infected medullary cavity, hoping to play the role of anti-infection and stabilizing the fracture end at the same time. However, ...

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Problems solved by technology

However, there are problems with this method: 1. The surface of the Kirschner wire is smooth, the bonding interface with the bone cement is small, and the combination is not tight. When the bone cement is taken out, it is easy to separate from the Kirschner wire, and the bone cement is broken, resulting in the remaining bone in the medullary cavity. Cement debris; 2. The surface of the hand-made antibiotic intramedullary nail is rough, and the friction with the inner surface of the medullary cavity is large, so it is difficult to insert and pull out the intramedullary nail; Tight fit, too large gap makes the concentration of locally released antibiotics drop sharply, hindering its antibacterial effect; 4. The properties of handmade antibiotic intramedullary nails are not uniform, and biomechanical research cannot be carried out, which affects further research on this technology

[0005] However, the existing bone cement molding molds can only be used once, or need to be extruded, which is relatively complicated and not convenient enough

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