CN102772240B - Intra-osseous self-restoring high-efficiency bone fracture resetting and fixing device - Google Patents

Abstract

The invention discloses an intra-osseous self-restoring high-efficiency bone fracture resetting and fixing device, comprising a body and expansion forks, wherein the expansion forks are respectively arranged on two sides of the body and are made of a memory alloy material. The bone fracture resetting and fixing device disclosed by the invention is made of a nickel titanium memory alloy material, is based on the characteristic that the material generates memory deformation in a temperature range of 0-40 DEG C, and is optimally designed in combination with ergonomics. When in use, the bone fracture resetting and fixing device is put in brine ice of 0-5 DEG C, the two expansion forks are closed, the device is put into a scaphoid bone from the bone fracture node after drilling, hot brine of 40 DEG C is wetly dressed on the fixing device, and dynamic stress is generated due to the martensitic effect of the nickel titanium memory alloy plate, so that the stress is natural and soft, the device and the bone are combined steadily and reliably, and the device is favorable to stress resetting and bone fracture fixation. The intra-osseous self-restoring high-efficiency bone fracture resetting and fixing device is wide in application and especially suitable for resetting and fixation of fracture of scaphoid, external fixation is not required after internal fixation, the operation is simple, postoperative infection is avoidable, and postoperative early movement and recovery of wrist functions of a patient are facilitated.

Description

A kind of bone is interior from the efficient reduction of the fracture of complex and fixture

Technical field

The invention belongs to technical field of medical instruments, further belong to orthopedic instrument technical field, be specifically related to one and merge and fix for fracturing, be particularly suitable for fracture of scaphoid bone of wrist and reset interior from the efficient reduction of the fracture of complex and fixture with fixing bone.

Background technology

Fracture is the human body frequent situation that sustains an injury, and the reduction of the fracture is fixedly the most frequently used medical procedure.Wrist is mankind's functional parts the most flexibly, and carpal bone is to be combined into by the bone piece of polylith different structure, and structure is very complicated.Once come to harm, it resets fixing larger than the reduction of the fracture difficulty at other positions.The reset of prior art generally adopts Kirschner wire, fixation steel plate etc. to reset and fixes fracture of the carpal bone position, because these apparatuses are fixing, intercarpal joints position is not had to pressurization, postoperative the outer fixing of long period that need, to patient's postoperative function to recover to affect, and recovers slower.And steel plate screw is fixing will hole on less carpal bone, complicated operation, increases operation wound, affect function of joint, especially for the fixing of wrist nut bone, postoperatively may occur the complication such as pain and wound infection, totally unfavorable to carpal post-operative recovery.Therefore, research and develop a kind of recovery that is conducive to early ambulant and wrist joint function after operation in patients, easy and simple to handle, the bone fracture internal fixing device that can avoid infection is again extremely important, is the best mode that overcomes prior art defect.

Summary of the invention

The object of the present invention is to provide a kind of simple in structurely, operation technique is easy, is conducive to the recovery of early ambulant and wrist joint function after operation in patients, in the bone that can avoid infection again from the efficient reduction of the fracture of complex and fixture.

The object of the present invention is achieved like this, comprises body, expansion fork, and described body both sides arrange respectively expansion fork, and make with memory alloy material.

The present invention adopts Ultimum Ti material to make, and produces the characteristic of memory deformation according to material within the scope of 0 ℃ ~ 40 ℃, and in conjunction with human engineering optimal design.When use, the present invention is in the brine ice of 0 ℃ ~ 5 ℃, make two expansion fork closed, after boring, dispose nut bone from fracture tuberosity, in fixture, utilize Ultimum Ti sheet material Ma Shi effect to produce dynamic pressurized power with the hot salt brine soak of 40 ℃, pressurization nature, soft, device, bone are combined together, solid and reliable, be conducive to pressurization and reset and fracture fixation.The present invention is simple in structure, and cost of manufacture is cheap.Applied widely, the reset that is particularly suitable for fracture of scaphoid bone is with fixing, interior fixing after without outer fixing, easy and simple to handle, can avoid again postoperative infection, be conducive to the recovery of early ambulant and wrist joint function after operation in patients.

Accompanying drawing explanation

Fig. 1 is overall structure schematic diagram of the present invention;

Fig. 2 is another embodiment structural representation of the present invention;

Fig. 3 is third embodiment of the invention structural representation;

Fig. 4 is four embodiment of the invention structural representation;

Fig. 5 is fifth embodiment of the invention structural representation;

Fig. 6 is sixth embodiment of the invention structural representation.

In figure: 1-body, 2-expands fork, the hook-shaped structure of 21-, 22-tooth-shape structure, 211-zigzag structure, 3-fixed teeth, the secondary expansion fork of 4-.

The specific embodiment

Below in conjunction with accompanying drawing, invention is described further, but never in any form the present invention is limited, any conversion of doing based on training centre of the present invention, all falls into protection scope of the present invention.

As shown in Figure 1:novel body 1, theexpansion fork 2 of comprising of this use, describedbody 1 both sides arrange respectivelyexpansion fork 2, and make with memory alloy material.

Describedexpansion fork 2 is symmetrical structure, and between antitrope, circular arc transition connects.

Fig. 2 illustrates the structure of another embodiment of the present invention, and the hook-shaped structure 21 of 2 front end arranged outside is pitched in described expansion.

Fig. 3 illustrates the structure of the third embodiment of the present invention, and described expansion is pitched 2 exterior front tooth-shape structure 22 is set.

Fig. 4 illustrates the structure of the 4th kind of embodiment of the present invention, and described expansion is pitched 2 rear portions, outsidesecondary expansion fork 4 is set.Secondary expansion fork 4 contributes to coordinate main expansion to fork better fixation.

Fig. 5 illustrates the structure of the 5th kind of embodiment of the present invention, and described expansion is pitched 2 rear portions, outside,near body 1 place, fixedteeth 3 is set.Which contributes to mate-assist expansion to fork fixation

Fig. 6 illustrates the structure of the 6th kind of embodiment of the present invention, in described hook-shaped structure 21,zigzag structure 211 is set.Be conducive to hook-shaped structure division and better play support fixation, avoid occurring skidding.

The thickness of describedbody 1 is 2 ~ 5mm.

Describedbody 1 middle part is engraved structure, and weight reduction effectively, is conducive to again plastic deformation, is suitable for the use situation of the large expansive force of aperture.

The opening angle of describedexpansion fork 2 is 10 ° ~ 25 °, is optimized for 15 °.

The thickness of describedexpansion fork 2 is 1 ~ 5mm.

Describedbody 1 middle part width beexpansion fork 2 while launching completelywidth 1/3 ~ 2/3.

The present invention adopts Ultimum Ti material to make, and other memory alloy materials with complex characteristic can be realized object of the present invention equally.

Be fixed as example explanation with fracture of scaphoid bone of wrist belowoperation principle of the present invention and work process:

In 0 ° C to 40 ° C temperature range, produce the characteristic of memory deformation according to material, utilize the dynamic pressurized power producing in change procedure to reset, fixing carpal bone, avoids patient's traumatic infection, is beneficial to the carpal functional rehabilitation of patient.The design that the present invention expands fork, hook and special angle thereof is more conducive to the reduction of the fracture with fixing, is conducive to early ambulant after operation in patients.

Use time of the present invention, first be placed in 0 ° makes inner fixing device of the present invention softening to the brine ice of 5 ° of C, the expansion fork of inner fixing device is drawn in closed, insert in the fixing hole of accomplishing fluently at tubercle of scaphoid bone place to facilitate, after inner fixing device is implanted in nut bone, with the hot salt brine soak inner fixing device of 40 ℃, sclerite is aggregated into one by the restoring force producing in inner fixing device form recovery process nature.Hook on expansion fork separates pressurization or displacement to prevent two fracture ends.Without being fixed by external force or external parts as prior art fixture, avoid fracture site to cause secondary damage and cause infection, affect patient's rehabilitation.

Claims (3)

1. bone is interior from the efficient reduction of the fracture of complex carpal joint and a fixture, comprises body (1), expansion fork (2), it is characterized in that: described body (1) both sides arrange respectively expansion fork (2), and make with memory alloy material; Described expansion fork (2) is symmetrical structure, and between antitrope, circular arc transition connects; The expansion fork hook-shaped structure of (2) front end arranged outside (21), rear portion, expansion fork (2) outside arranges secondary expansion fork (4).

2. bone according to claim 1 is interior from the efficient reduction of the fracture of complex carpal joint and fixture, it is characterized in that: described expansion fork (2) exterior front arranges tooth-shape structure (22).

3. bone according to claim 1 is interior from the efficient reduction of the fracture of complex carpal joint and fixture, it is characterized in that: in described hook-shaped structure (21), zigzag structure (211) is set.

Images