Screw assembly for bone fixation and bone fixing device

A technology for bone fixation and screw assembly, applied in the field of medical devices, can solve the problems of easy deformation and fracture, insufficient mechanical properties of implants, etc., and achieve the effects of stable mechanical properties, good bone healing and remodeling effects, and low cost.

Inactive Publication Date: 2020-07-14
ZOLTRIX MATERIAL INT LTD
View PDF16 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the mechanical properties of implants made of biodegradable absorbing materials (such as magnesium and magnesium alloys) are still insufficient. Since the elastic modulus of magnesium is lower th

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Screw assembly for bone fixation and bone fixing device
  • Screw assembly for bone fixation and bone fixing device
  • Screw assembly for bone fixation and bone fixing device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] see figure 1 As shown, the present embodiment provides a screw assembly 100 for bone fixation. The screw assembly 100 for bone fixation includes a non-degradable nut 110 and a degradable and absorbable screw body 120 , the nut 110 is detachably connected to one end of the screw body 120 , and the outer peripheral surface of the screw body 120 has external threads. The nut 110 can be made of non-degradable materials with strong mechanical properties such as stainless steel and titanium alloy.

[0047] The screw assembly 100 for bone fixation also includes a connector 130 . The nut 110 is detachably connected to the screw body 120 through a connecting piece 130 .

[0048] see image 3 As shown, the connecting piece 130 is integrally connected with the nut 110 , the connecting piece 130 has an external thread, the end surface of the screw body 120 mated with the nut 110 has a matching groove with an internal thread, and the connecting piece 130 is screwed into the match...

Embodiment 2

[0059] This embodiment provides a bone fixation device 10 .

[0060] A bone fixation device 10 includes a bone plate 200 and the screw assembly 100 for bone fixation described in Embodiment 1. see Figure 4 As shown, the bone plate 200 is penetrated with several fixing through holes 210 along its thickness direction, and the screw body 120 is used to cooperate with the fixing through holes 210 . After the screw main body 120 of the screw assembly 100 passes through the fixing through hole 210 and cooperates with it, the end of the screw main body 120 away from the nut 110 protrudes from the bone plate 200, so that the screw main body 120 can be inserted into the bone 20 after passing through the bone plate 200 . Preferably, the length of the screw body 120 is greater than the thickness of the bone plate 200 .

[0061] Preferably, the inner diameter of the fixing through hole 210 is smaller than the maximum outer diameter of the head of the nut 110 .

[0062] The bone fixat...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a screw assembly for bone fixation and a bone fixing device. The screw assembly for bone fixation comprises a non-degradable nut and a degradable absorption screw main body, wherein the nut is detachably connected with one end of the screw main body, and the outer peripheral surface of the screw main body is provided with external threads. The bone fixing device comprises abone fracture plate and the screw assembly, wherein the bone fracture plate is penetrated by a plurality of fixing through holes along the thickness direction of the bone fracture plate; and after ascrew main body of the screw assembly is matched with one fixing through hole, one end, far away from the nut, of the screw main body protrudes out of the bone fracture plate. The inventive screw assembly can be used for bone fixation, has stable mechanical property and low cost, is used for matching with a bone fracture plate to realize bone fixation, and can promote fracture healing and accelerate callus remodeling or remodeling, so that delayed healing or nonhealing of fracture is avoided.

Description

technical field [0001] The invention relates to the field of medical instruments, in particular to a screw assembly and a bone fixation device for bone fixation. Background technique [0002] At present, most of the medical metals used clinically are non-degradable biocompatible materials such as stainless steel and titanium alloys. After the fracture fixation function of the implant in the human body is completed, in most cases it needs to be surgically removed again, which will increase the economic and physical and mental burden of the patient. [0003] Implants made of traditional medical metal materials have good mechanical properties and can achieve early rigid fixation (Rigid fixation), especially for fractures of load-bearing bones (such as femur and tibia). However, because the mechanical properties (such as density and elastic modulus) of traditional medical metals do not match those of human bones, and the mechanical properties of the entire fixation system canno...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): A61B17/86A61B17/80
CPCA61B17/866A61B17/8685A61B17/8057A61B2017/00004A61B17/8625
Inventor 秦岭周泳豪廖志雄周昊翘
Owner ZOLTRIX MATERIAL INT LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap