Net bag device for treating ACL tibial avulsion fracture

Abstract

The invention provides a net bag device for treating the ACL tibial avulsion fracture. The net bag device comprises a net bag-shaped fixing structure, wherein three groups of traction fixing lines are fixedly connected onto the periphery of the net bag-shaped fixing structure at least; the net bag-shaped fixing structure is used for covering a fracture part; and multiple groups of traction fixing lines extend out from bone tunnels arranged on the tibia and then are fixed together, so that the net bag-shaped fixing structure can tightly press the avulsed ligament on the tibia. According to the net bag device for treating the ACL tibial avulsion fracture, provided by the invention, the net bag device directly covers the ligament avulsion part, so that injuries to the ligament and joints are not caused, and adverse postoperative risks are reduced; and in addition, by adopting the net bag device provided by the invention, the operation difficulty and operation cost are reduced greatly, and a secondary operation for taking out an implant is not required since the net bag device is made of ultrahigh molecular weight polyethylene suture lines.

Description

technical field [0001] The invention relates to the technical field of medical device design, in particular to a net bag device for treating type III and type IV ACL tibial insertion (tibial intercondylar crest) avulsion fractures. Background technique [0002] ACL (anterior cruciate ligament) tibial insertion avulsion fracture is an avulsion fracture at the attachment of the lower end of the ACL. It is a special ACL injury; it usually occurs in children and adolescents aged 8-16, and is often caused by small stress , such as a bicycle fall; because the intercondylar ridge of the tibia is not fully ossified in adolescents and children, it is relatively fragile compared with the ACL, and ACL tibial insertion avulsion fractures also occur in adults, often associated with meniscus and medial collateral ligament injuries. [0003] For example, according to the Meyers-McKeever classification, ACL tibial insertion avulsion fractures are generally divided into three types, namely: ...

AI Technical Summary

Problems solved by technology

[0006] 1. Reference Figure 7 As early as 1991, Van et al. described the use of arthroscopic screws to fix tibial intercondylar fractures. In 1993, Lubowitz et al. used self-tapping screws through the anterior medial high approach. Although the fixation strength of the screws is high, early activities can prevent joint stiffness. However, the disadvantages of this treatment method are: 1) It is only suitable for large bone blocks; 2) Second surgery is required to remove the screw head protrusion; 3) Cartilage may be damaged during the operation, so this treatment method is not suitable for growth and development adolescents and children;

[0007] 2. Reference Figure 5 In 1994, Matthews et al described arthroscopic fixation of tibial intercondylar fractures with non-absorbable sutures, which reduced the difficulty and cost of surgery, but this treatment method has the following defects: 1) It is only suitable for large bone fragments; 2) It may cause the front edge of the bone block to be lifted; 3) The suture will cut the ligament, cause ligament damage, and also cause joint fibrosis, limited joint movement and partial motor function impairment

[0008] 3. Reference Image 6 In 2005, Dietrich et al. described the arthroscopic endobutton fixation operation, which provided more effective fixation strength, but this treatment method is relatively complicated and costly, and the implanted endobutton may collide with other tissues, requiring two Surgery to remove implanted metal objects

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