CN212522087U

CN212522087U - Adjustable self-stress stimulation bone titanium mesh

Info

Publication number: CN212522087U
Application number: CN202020715570.XU
Authority: CN
Inventors: 马立泰; 杨毅; 刘浩
Original assignee: West China Hospital of Sichuan University
Current assignee: West China Hospital of Sichuan University
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2021-02-12
Anticipated expiration: 2030-04-30

Abstract

The utility model discloses an adjustable nodal pattern is from amazing bone titanium net of stress, including the outer sleeve, inner skleeve and adjustable elastic support mechanism, the outer sleeve, the inner skleeve both ends are opened, inner skleeve part suit is in the outer sleeve, the inner skleeve is through adjustable elastic support mechanism connection, adjustable elastic support mechanism connects at inner skleeve lower extreme and outer sleeve inner wall, adjustable elastic support mechanism is along the outer sleeve, the axial length of inner skleeve is adjustable, adjustable elastic support mechanism is along the outer sleeve, the radial of inner skleeve can strut, the outer sleeve, the inner skleeve is cylindrical. The utility model discloses can strut automatically, can also provide axial stress and radial stress, be favorable to the growth and the fusion of skeleton to also can provide stress stimulation when the patient lies flat.

Description

Adjustable self-stress stimulation bone titanium mesh

Technical Field

The utility model relates to the field of medical equipment, especially, relate to an adjustable nodal pattern is from amazing bone titanium net of stress.

Background

The titanium net in the prior art can not be automatically unfolded and can not adjust stress, and particularly, the stress stimulation is lacked at the bone grafting part of the operation due to the lack of the self gravity pressurization function when the patient lies down horizontally after the operation, so that the titanium net needs to be cut to meet various height sizes, and the sinking risk is high.

The stress stimulation, the growth and development of human bone tissues and the rehabilitation process of bone diseases are continuously modeled and rebuilt to adapt to the surrounding environment. The bone structure can be continuously reconstructed and shaped to adapt to the change of external environment only in the mechanical environment which is continuously adapted to bear stress stimulation generated by external force.

Stress adaptability of bones is also called functional adaptability of bones, and is characterized in that when bone needs to be increased, bone formation increases the capacity of the bones to complete the functions; when reduction is desired, there is bone resorption, reducing their ability to perform their function, and it is seen that changes in bone growth, development, atrophy and regression are closely related to the stresses to which they are subjected. The process of bone remodeling is the continuous growth, strengthening and resorption of living bone. The goal of bone reconstruction is always to adapt the internal structure and external morphology to changes in their loading environment, which can be divided into two categories: surface reconstruction and internal reconstruction. Resurfacing, which refers to the resorption or deposition of bone material on the bone surface, is a long slow process that typically lasts for months or years; the internal reconstruction refers to the change of the volume density and the quality of the bone tissue caused by the change of the mineral content and the porosity in the bone tissue, and can be completed in a short time. In humans, bone injury is remodeled in a short period of time, on the order of several weeks.

One study in russia and the united states showed that flying in space for more than 10 months resulted in total bone loss, with a 12% and 8.2% decrease in pelvis and femur, respectively, but the skull had no significant decrease in bone mass due to increased flow to the head as blood was redistributed under weightless conditions and blood flow stress was stimulated to compensate for head bone mass.

Stress shielding effect in bone biomechanics, and stress shielding phenomenon is important embodiment of bone reconstruction effect. In bone, osteoblasts and osteoclasts in bone tissue regulate the growth or resorption of bone by sensing mechanical stimuli. When the strain of the bone is lower than 50-100 micro strain and the stress is lower than 1-2MPa, the bone tissue absorbs; when the strain of the bone is higher than 1000-1500 micro strain and the stress is higher than about 20MPa, the bone tissue grows; when the strain of the bone is further higher than about 3000 microstrain and the stress is higher than about 60MPa, the bone tissue is damaged.

When stress shielding occurs in bone tissues, the stress level on bones is often in a low level for a long time, so that the bone tissues are gradually absorbed, osteoporosis of fracture parts is caused, and the bone tissues become an important cause of postoperative re-fracture.

Wolff's law: the function of the skeleton, which is to withstand the mechanical strain of the bone tissue during activity, has been recognized a century ago as the phenomenon known as Wolff's law (wulff's law). Bone forces aim to achieve an optimal structure, i.e. the morphology and material of the bone is regulated by the activity level of the individual, so that it is sufficient to bear the mechanical load, but not to increase the burden of metabolic transport.

Bones are living organisms and have their own laws of change. Wolff's law states that: bone growth is affected by mechanical stimuli to change its structure. The use is strong, and the waste is weak.

At present, various elastic deformation technologies utilize elastic materials and mechanical design, and utilize self gravity, deformation can be generated under the conditions of standing and loading and during standing activities, so that compression micro deformation can be generated, and the fractured ends or the bone grafting parts of vertebrae can bear more stress stimulation, thereby achieving the effects of stress promotion of bone formation, fracture healing and intervertebral fusion. The patient can not generate compression micro-deformation when lying or lying in bed, the average sleep time of the adult can be about 8 hours, and the time for lying in bed of the patient can reach 15 hours or more because the postoperative patient can not bear load for a long time and has pain, so the time for lying in bed of the patient after operation is longer, and the stress stimulation is lacked to improve the design of the internal implant.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an adjustable nodal pattern is from amazing bone titanium net of stress can strut automatically, can also provide axial stress and radial stress, is favorable to the growth and the integration of skeleton, and it is amazing that key solution patient provides suitable stress when the postoperative bed recumbent position promotes to plant the bone and fuses.

In order to achieve the purpose, the utility model adopts the following technical proposal to realize:

the utility model discloses an adjustable nodal pattern is from amazing bone titanium net of stress, including outer sleeve, inner skleeve and adjustable elastic support mechanism, outer sleeve, inner skleeve both ends are opened, and inner skleeve part suit is in the outer sleeve, and outer sleeve, inner skleeve are connected through adjustable elastic support mechanism, adjustable elastic support mechanism connects at inner skleeve lower extreme and outer sleeve inner wall, and adjustable elastic support mechanism is adjustable along the axial length of outer sleeve, inner skleeve, and adjustable elastic support mechanism can strut along the radial of outer sleeve, inner skleeve, and outer sleeve, inner skleeve are cylindrical titanium net.

Furthermore, the outer sleeve and the inner sleeve are in sliding fit, and the outer sleeve and the inner sleeve are supported through an adjustable supporting structure.

Preferably, the adjustable support structure comprises an expansion body and a screw, the expansion body is provided with an axial hole, the diameter of the screw is larger than that of the axial hole, the expansion body is positioned in a gap between the outer sleeve and the inner sleeve, and the expansion body is attached to the side wall of the outer sleeve or the inner sleeve.

As another preference, the adjustable support structure includes a lead screw threaded adjustment mechanism.

Preferably, the adjustable resilient support means comprises a spring.

As another preferred, the adjustable elastic support mechanism comprises crossed spring plates.

Furthermore, the opposite ends of the outer sleeve and the inner sleeve are respectively provided with ear wings, and the ear wings are provided with through holes.

The utility model has the advantages as follows:

1. the adjustable elastic supporting mechanism can adjust the axial stress of the adjustable self-stress stimulation bone titanium mesh of the operation section, so that the stress is in an ideal range.

2. The adjustable supporting structure can provide radial stress for the adjustable self-stress stimulation bone titanium mesh, so that axial stress can be generated and maintained in a horizontal position after adjustment, bone grafting fusion is promoted, and recovery of a patient is accelerated. When standing upright, the stress is aggravated by the self-gravity, and the stress transmitted by the bone rises.

3. The adjustable elastic supporting mechanism can adjust the length of the adjustable self-stress stimulation bone titanium mesh without cutting, thereby reducing the operation time and facilitating the use.

4. The utility model discloses but accurate adjustment elasticity titanium net has been proposed for the first time, can strut automatically.

Drawings

FIG. 1 is a sectional view of example 1.

Fig. 2 is a front view of embodiment 1.

FIG. 3 is an enlarged partial view of a portion of the adjustable support structure.

Figure 4 is a cross-sectional view of embodiment 2,

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings.

Example 1

As shown in fig. 1 and 2, the present embodiment includes an outer sleeve 2, an inner sleeve 1 and an adjustable elastic support mechanism 3, two ends of the outer sleeve 2 and the inner sleeve 1 are open, the inner sleeve 1 is partially sleeved in the outer sleeve 2, the outer sleeve 2 and the inner sleeve 1 are connected by the adjustable elastic support mechanism, the adjustable elastic support mechanism is connected to the lower end of the inner sleeve 1 and the inner wall of the outer sleeve 2, the adjustable elastic support mechanism is adjustable in length along the axial direction of the outer sleeve 2 and the inner sleeve 1, the adjustable elastic support mechanism is expandable along the radial direction of the outer sleeve 2 and the inner sleeve 1, and the outer sleeve 2 and the inner sleeve 1 are both. The adjustable elastic supporting mechanism is made of a spring 3.

The outer sleeve 2 and the inner sleeve 1 are in sliding fit, and the outer sleeve 2 and the inner sleeve 1 are supported by an adjustable support structure 10.

As shown in fig. 3, the adjustable supporting structure 10 comprises an expansion body 7 and a screw 9, the expansion body 7 is provided with an axial hole 8, the diameter of the screw 9 is larger than that of the axial hole 8, the expansion body 7 is positioned in the gap between the outer sleeve 2 and the inner sleeve 1, and the expansion body 7 is attached to the side wall of the outer sleeve 2 or the inner sleeve 1; when in use, the screw 9 is inserted into the axial hole 8, and the expansion body 9 is adjusted to expand by screwing in the screw 9.

The adjustable support structure 10 may also be constructed using a lead screw threaded adjustment mechanism such as a jack.

The opposite ends of the outer sleeve 2 and the inner sleeve 1 can be respectively provided with ear wings 5 which are provided with through holes 6, and when the device is used, the device can be fixed by screws but is not locked, and can move slightly, thereby avoiding stress concentration.

Example 2

As shown in fig. 4, the present embodiment is different from embodiment 1 in that:

the adjustable elastic supporting mechanism is a crossed elastic sheet 11. Other parts of this embodiment are the same as embodiment 1, and thus are not described in detail.

Of course, the present invention may have other embodiments, and those skilled in the art may make various corresponding changes and modifications according to the present invention without departing from the spirit and the essence of the present invention, and these corresponding changes and modifications should fall within the protection scope of the appended claims.

Claims

1. An adjustable self-stress stimulation bone titanium mesh is characterized in that: including outer sleeve, inner skleeve and adjustable elastic support mechanism, outer sleeve, inner skleeve both ends are opened, and inner skleeve part suit is in the outer sleeve, and outer sleeve, inner skleeve are connected through adjustable elastic support mechanism, adjustable elastic support mechanism connects at inner skleeve lower extreme and outer sleeve inner wall, and adjustable elastic support mechanism is adjustable along the axial length of outer sleeve, inner skleeve, and adjustable elastic support mechanism can strut along the radial of outer sleeve, inner skleeve, and outer sleeve, inner skleeve are cylindrical titanium net.

2. The adjustable self-stress stimulating osseous titanium mesh of claim 1, wherein: the outer sleeve and the inner sleeve are in sliding fit, and the outer sleeve and the inner sleeve are supported through an adjustable supporting structure.

3. The adjustable self-stress stimulating osseous titanium mesh of claim 2, wherein: the adjustable supporting structure comprises an expansion body and a screw, wherein the expansion body is provided with an axial hole, the diameter of the screw is larger than that of the axial hole, the expansion body is positioned in a gap between the outer sleeve and the inner sleeve, and the expansion body is attached to the side wall of the outer sleeve or the inner sleeve.

4. The adjustable self-stress stimulating osseous titanium mesh of claim 2, wherein: the adjustable support structure comprises a lead screw thread adjustment mechanism.

5. The adjustable self-stress stimulating osseous titanium mesh according to any of claims 1-4, wherein: the adjustable elastic support mechanism comprises a spring.

6. The adjustable self-stress stimulating osseous titanium mesh according to any of claims 1-4, wherein: the adjustable elastic supporting mechanism comprises crossed elastic sheets.

7. The adjustable self-stress stimulating osseous titanium mesh according to any of claims 1-4, wherein: the opposite ends of the outer sleeve and the inner sleeve are respectively provided with ear wings, and through holes are formed in the ear wings.