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Self-breaking type pressing bolt assembly

A bolt assembly, self-disconnecting technology, applied in the direction of fastening devices, internal fixators, internal bone synthesis, etc., to achieve good promotion and use, avoid complications, and reliable results

Active Publication Date: 2018-11-30
THE THIRD HOSPITAL OF HEBEI MEDICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This problem has not been solved satisfactorily so far, so it is necessary to adopt innovative new instruments and bolts for fixing

Method used

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  • Self-breaking type pressing bolt assembly
  • Self-breaking type pressing bolt assembly
  • Self-breaking type pressing bolt assembly

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] The self-breaking pressure bolt assembly of the present invention is composed of a pressure bolt 1 , a pressure nut 2 and a twist screwdriver 10 .

[0016] figure 1 , 2 It shows that the screw rod of the pressurizing bolt 1 is an unequal diameter screw rod, the diameter of the rear part of the screw rod is smaller than the diameter of the front part of the screw rod, and the junction of the large diameter section 3 and the small diameter section 4 of the screw rod is an inclined annular connecting section 5, the screw rod The small-diameter section 4, the annular connecting section 5 and the large-diameter section 3 close to the annular connecting section 5 are respectively threaded for screwing in the pressurized nut 2.

[0017] figure 1 , 2 It shows that there is an inner hole 6 in the rear part of the screw of the pressure bolt 1, and the inner hole 6 extends from the end surface of the screw to the annular connecting section 5 beyond the junction of the large-dia...

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Abstract

The invention provides a self-breaking type pressing bolt assembly, and belongs to the technical field of orthopedics medical apparatus and instruments. The self-breaking type pressing bolt assembly is used for pressing and resetting from the outer side when fracture of tibial plateau occurs. According the technical scheme, the diameter of the back portion of a threaded rod of the pressure bolt isless than that of front portion of the threaded rod, the joint part of a large diameter segment and a small diameter segment of the threaded rod is an inclined circular connecting segment, an inner hole is formed in a rod body of the back portion of the threaded rod, the inner hole of a pressing nut is an unequal diameter screw hole, a screw thread of the screw hole with large diameter of the front portion of the pressing nut is matched with the screw thread of the large diameter segment of the threaded rod of the pressing bolt, the screw thread of the screw hole with small diameter of the back portion of the pressing nut is matched with the screw thread of the small diameter segment of the threaded rod of the pressing bolt, the connecting position of the screw hole with the large diameter of the front portion of the pressing nut and the screw hole with the small diameter of the back portion of the pressing nut is a perpendicular circular plane. The self-breaking type pressing bolt assembly has a simple structure, convenient operation and reliable effect, eliminates the situation that pain and limitation of movement occur under the local soft tissue stimulation caused by the excessive length which is left at the tail end of the pressing bolt, avoids the occurrence of various complications, and achieves a satisfactory restoration effect.

Description

technical field [0001] The invention relates to a device for performing pressurized reduction from the outside when treating tibial plateau fractures, and belongs to the technical field of orthopedic medical devices. Background technique [0002] The advantage of minimally invasive surgery for tibial plateau fractures is that it can reduce surgical trauma and effectively reduce the incidence of intraoperative and postoperative complications. The key to its success is to achieve closed fracture reduction. The radiographic manifestations of tibial plateau fractures are often split fractures of the tibial plateau, accompanied by articular surface collapse, and even metaphyseal comminution in severe cases. The operation is difficult and requires high surgical skills. Therefore, the treatment of tibial plateau fractures has always been a difficult point in trauma orthopedics. At present, minimally invasive reduction techniques for tibial plateau fractures are mainly for jacking ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/68A61B17/86
CPCA61B17/683A61B17/8605
Inventor 郑占乐张英泽于贤
Owner THE THIRD HOSPITAL OF HEBEI MEDICAL UNIV
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