A kind of internal fixation system and using method thereof

Abstract

The invention relates to an internal fixation system and a use method thereof. The internal fixation system comprises a bone fracture plate of an inert biological material and a bone fracture screw ofone or more capable of degrading a magnesium alloy, and may further comprise an internal fixation extraction forceps in actual use. The invention also discloses a use method of the aforementioned internal fixation system. The internal fixation system and the use method have the advantages of a traditional internal fixation system, and utilize the feature that the position that the bone fracture plate is in contact with the bone fracture screw easily generates galvanic corrosion so that corrosion residual screws can be simply and quickly cut off when taking out the bone fracture plate, and screw rod parts of the remaining bone fracture screws can remain in a human body, thereby reducing the hospitalization rate and hospitalization time of patients, and improving the surgical satisfaction of the patients.

Description

technical field [0001] The present invention relates to an orthopedic medical device, in particular to an internal fixation system and its usage. Background technique [0002] In orthopedic treatment, long bone fracture of extremities is a common and frequently-occurring disease clinically. With the extensive development of orthopedic minimally invasive surgery, the superiority of minimally invasive surgery is becoming more and more obvious. In the treatment of limb long bone fractures, open reduction and internal fixation and closed reduction and internal fixation are mostly used clinically. The internal fixation system used is bone plate, marrow Internal nails and so on. The metal materials used in these implants are mostly stainless steel, pure titanium or titanium alloy, which have good strength and toughness, and can form a strong fixation effect on the fracture. Although stainless steel and titanium alloys are biologically inert materials, they may react with the com...

AI Technical Summary

Problems solved by technology

Based on the advantages of magnesium alloys, the corresponding magnesium alloy bone plate, but when magnesium alloy materials are used alone as an internal fixation system for long bone fractures, the biggest problem is low strength. As the degradation progresses, the mechanical properties decay rapidly, and there are fixation failures. risks of

[0004] Those skilled in the art have been trying to use magnesium alloy intramedullary nails. However, due to the galvanic corrosion effect, there is a problem of accelerated corrosion at the contact between the bioinert material bone plate and the magnesium alloy intramedullary nail, and the expected fixation effect cannot be achieved. This defect has made the internal fixation system unable to be practically applied, so there is still room for further improvement

Images