A dynamic locking screw and dynamic locking bone plate system

A locking screw and bone plate technology, applied in the direction of outer plate, fixator, internal bone synthesis, etc., can solve the problems of complex production process of dynamic locking screw, and achieve the effect of easy callus formation, promotion of callus formation, and simple production process.

Active Publication Date: 2017-12-19
江苏百易得医疗科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For this reason, the technical problem to be solved by the present invention lies in the complicated production process of the existing dynamic locking screw, thus proposing a dynamic locking screw with simple production

Method used

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  • A dynamic locking screw and dynamic locking bone plate system
  • A dynamic locking screw and dynamic locking bone plate system
  • A dynamic locking screw and dynamic locking bone plate system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] like Figure 1-Figure 3 As shown, this embodiment provides a dynamic locking screw, including a nail shaft 11 , a shaft sleeve 12 and a fixing pin 2 .

[0039] The screw shaft 11 includes a threaded portion 111, which is used to fix the dynamic locking screw on the bone plate through screw fit, and the threaded portion 111 can be in the shape of a dynamic locking screw in the prior art And structure, in this embodiment, the threaded part 111 is in the shape of an inverted truncated cone, and the thread on the threaded part 111 is a tapered thread; at the same time, the said threaded part 11 is connected with a shaft 112, There are many ways to connect the threaded part 111 and the shaft 112, such as threaded screw fixing, welding, etc. In this embodiment, the two are integrally formed; The end portion of 111 is provided with a first pin hole 113 .

[0040] The shaft sleeve 12, the shaft sleeve 12 includes a shaft sleeve body, the outer body of the shaft sleeve body is...

Embodiment 2

[0046] like Figure 4-6 As shown, this embodiment provides a dynamic locking screw, which is a modification on Embodiment 1, and the modification is as follows:

[0047] The end of the shaft 112 away from the threaded portion 111 is provided with a fixing block 114, and the first pin hole 113 is arranged on the fixing block 114; the bottom end of the blind hole 122 is provided with a fixing groove 125 , and the second pin hole 124 is set on the groove wall of the fixing groove 125; One pin hole 113 and the second pin hole 124 fix the nail shaft 11 and the bushing 12 together; in this embodiment, the fixing block 114 is a square block, and the fixing Groove 125 matches with described fixed block 114, and its shape, size are consistent with described fixed block 114, can guarantee best fixing effect like this; In addition, in the present embodiment, as Image 6 As shown, the fixing pin 2 is a conical body with a circular cross section.

Embodiment 3

[0049] like Figure 7 As shown, this embodiment provides a dynamic locking bone plate system, including a bone plate 3, and the dynamic locking screw 1 of the present invention, the bone plate is any existing bone plate that can use dynamic locking screws, on which An internally threaded hole matched with the threaded part 111 is provided, which is suitable for installing and fixing the dynamic locking screw 1 to the fracture site. The number of the internally threaded holes can be determined according to the actual situation. In this embodiment, The number is 8, and the internal threaded hole is an internal taper threaded hole.

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Abstract

The invention relates to a dynamic locking screw; a screw shaft is provided with a first pin hole, a shaft sleeve is provided with a second pin hole, and a fixing pin penetrates the first and second pin holes so as to fix the screw shaft with the shaft sleeve; a whole making process is simple and convenient. In the prior art, a screw shaft and a shaft sleeve are fixed in a welding mode, the gap between the screw shaft and the shaft sleeve is very narrow, so the manufacture is very difficult; the novel dynamic locking screw can solve the said technical problems; in addition, a gap is formed between a shaft rod and a blind hole; after the dynamic locking screw fixes the bone plate, in a human body recovery process, the gap between the shaft rod and the blind hole allows the bone plate and the bone can slightly move in certain scope along with human body activities, thus providing light stable stimulation effects on bone fractures, promoting porosis formation, and accelerating fracture healing.

Description

technical field [0001] The invention relates to a dynamic locking screw and a dynamic locking bone plate system using the dynamic locking screw, belonging to the field of internal fixators for bone setting in surgical instruments. Background technique [0002] The traditional method of fracture treatment is to fix the steel plate on the fracture, so that the two ends of the fracture can re-grow, and try to restore the original appearance and performance of the bone under the protection of the steel plate. However, the traditional steel plate mainly relies on the friction force of the interface between the bone and the steel plate to realize the pressure of the steel plate on the bone. As the axial dynamic load cycle increases, the screw begins to loosen and the friction force decreases, and the steel plate finally fixed at the fracture site is thus loose. If this loosening occurs before the fracture has healed, instability will occur at the fracture site, which may eventual...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B17/86A61B17/80
CPCA61B17/8014A61B17/8625A61B17/8635A61B2017/564A61B2017/8655
Inventor 丁建忠
Owner 江苏百易得医疗科技有限公司
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