CN202761414U

CN202761414U - Carpal scaphoid fracture fixation device

Info

Publication number: CN202761414U
Application number: CN 201220341467
Authority: CN
Inventors: 徐永清; 李川; 朱跃良
Original assignee: Individual
Current assignee: 920th Hospital of the Joint Logistics Support Force of PLA
Priority date: 2012-07-16
Filing date: 2012-07-16
Publication date: 2013-03-06
Anticipated expiration: 2022-07-16

Abstract

The utility model discloses a carpal scaphoid fracture fixation device which comprises a back of a bow and nail feet. The back of the bow and the nail feet are in an integrated structure and the back of the bow is connected with the nail feet through a fixed arc. Carpal scaphoid fracture fixation device is made from nickel-titanium memory alloy materials. According to a character of the nickel-titanium memory alloy materials that the nickel-titanium memory alloy materials produce memory reshape at the temperature of from 0 DGE C to 40 DEG C, a special structure form of the nickel-titanium memory alloy materials is designed on the basis of fracture fixation engineering science structure requirement. The fixation device is placed in ice salt water at the temperature of from 0 DGE C to 5 DGE C, two nail feet of the fixation device are unfolded and are directly arranged on two broken ends of a carpal scaphoid fracture bone, wet compress with hot salt water at the temperature of 40 DGE C is applied on the fixation device, dynamic compressive force is produced by use of nickel-titanium memory alloy panel martensite effect to naturally and softly compress and the fixation device and the bone are combined to a stable and reliable whole. With the fixed arc and a special angle design, the carpal scaphoid fracture fixation device has the advantages of being favorable for bone grafting, compression reset and fixation and easy to operate because a fusion cage is directly arranged under the skin and without extra fixation, avoiding infection and benefiting early motions of a patient after a surgery and recovery of carpal function.

Description

A kind of fracture of scaphoid bone of wrist holder

Technical field

This utility model belongs to technical field of medical instruments, further belongs to the orthopedic instrument technical field, is specifically related to a kind of the fusion for fracture and fixes, and is particularly suitable for the holder that fracture of scaphoid bone of wrist resets.

Background technology

Fracture is the human body frequent situation that sustains an injury, and the reduction of the fracture fixedly is the most frequently used medical means.Wrist is flexibly functional part of human beings, and carpal bone is that the bone agllutination by the polylith different structure closes and forms, and is complex structure.In case come to harm, its reset fixing reduction of the fracture difficulty than other positions will many.The general fixedly fracture of the carpal bone positions that reset such as Kirschner wire, fixation steel plate of adopting that reset of prior art, because these apparatuses are fixing the intercarpal joints position there is not pressurization, postoperative needs the outer fixing of long period, exerts a certain influence for patient's functional rehabilitation, namely can recover slow.And steel plate screw is fixing need to punch at less carpal bone, and complicated operation increases operation wound, affects function of joint.Fixing for the wrist nut bone particularly, the complication such as pain and infection may appear in postoperative, and are totally unfavorable to carpal recovery.Therefore, developing and a kind ofly be conducive to the wrist nut bone to merge stationary device very necessary, is the best way that overcomes the prior art defective.

The utility model content

It is a kind of simple to operate, fixed that the purpose of this utility model is to provide, and can effectively avoid infection, flexible, is conducive to fixedly fusion device of fracture of scaphoid bone of wrist that patient's wrist joint function recovers.

The purpose of this utility model be achieved in that described fracture of scaphoid bone of wrist fixedly fusion device comprise the back of a bow and nail foot, the described back of a bow is the integral type structure with the nail foot, the back of a bow is connected with following closely between the foot by fixing arc.

This utility model adopts the Ultimum Ti material to make, in 0 ℃ to 40 ℃ temperature range, produce the characteristic of memory deformation according to material, design special construction form of the present utility model by fracture fixation engineering structural requirement, holder is in 0 to 5 degree centigrade brine ice, two nail feet of holder are launched, after directly inserting fracture of scaphoid bone of wrist two broken ends of fractured bone, with 40 degrees centigrade hot salt brine soaks on holder, utilize Ultimum Ti sheet material Ma Shi effect to produce dynamic pressurized power, pressurization nature, soft, device, bone are held be integrated, solid and reliable.Fixedly the design of arc and special angle thereof more is conducive to bone grafting to this utility model, pressurization resets and fixing, and fusion device directly places subcutaneous, need not outer fixingly, both easy and simple to handle, has avoided again infection, is conducive to the recovery of early ambulant and wrist joint function behind the operation in patients.

Description of drawings

Fig. 1 is that this utility model overall structure master looks schematic diagram;

Fig. 2 is that the AA of Fig. 1 is to view;

Fig. 3 is the left view of Fig. 1;

Fig. 4 is the another kind of embodiment structural representation of this utility model.

Among the figure: the 1-back of a bow, 2-follows closely foot, the 3-nail tip, 4-is arc fixedly.

The specific embodiment

The utility model is described in further detail below in conjunction with accompanying drawing, but never in any form this utility model is limited, and any conversion based on this utility model training centre is done all falls into this utility model protection domain.

As Figure 1-3, this utility model comprises the back of a bow 1 and nail foot 2, described hunchbacked 1 with nail foot 2 be the integral type structure, the back of a bow 1 is connected with following closely between the foot 2 by fixing arc 4.

Described hunchbacked 1 can make of the Ultimum Ti material with nail foot 2, and other memory alloy materials can be realized the purpose of this utility model equally.

Described nail foot 2 lower ends arrange nail tip 3.

Described nail tip 3 tilts to the back of a bow 1 inboard, and axially is 15 ~ 35 ° of angles with nail foot 2.Fig. 4 shows except another embodiment of this utility model, and described nail tip 3 at least one side direction back of a bow 1 outside tilts, and axially is 15 ~ 25 ° of angles with nail foot 2.Abduction formula nail tip can produce different gathering fixed effects from the nail tip of interior receipts formula, can be according to the different situations choice for use, to reach the fixed effect that resets that adds most.

The radius of described fixedly arc 4 is 8 ~ 25cm.

Described hunchbacked 1 and nail be 60 ~ 80 ° of angles between the foot 2, be optimized for 70 ° of angles.

The length of described nail foot 2 is 5 ~ 15 mm, is optimized for 6 mm, 8 mm, 10 mm.

Described hunchbacked 1 cross-sectional width is 1 ~ 3 mm, and thickness is 0.8 ~ 2.0mm.

Described nail tip 3 front ends are provided with the blunt point of circular arc, and radius is 1 ~ 3mm.

Operation principle of the present utility model and work process:

Special construction of the present utility model produces the good reduction of the fracture, fixed effect.Can adopt the shape restorer such as Ultimum Ti to make, use easylier, need not the special-purpose setting tool of exerting pressure, naturally recover in the form process realization and fix, be difficult for causing secondary damage.

The Ultimum Ti material produces the characteristic of memory deformation in 0 ℃ to 40 ℃ temperature range, utilize the dynamic pressurized power that produces in the change procedure fixedly carpal bone that resets, and avoids patient's traumatic infection, is beneficial to the carpal functional rehabilitation of patient.This utility model fixedly design of arc and special angle thereof is conducive to more that bone grafting resets and is fixing, is conducive to early ambulant behind the operation in patients.

When using this utility model, the brine ice of at first putting into 0 to 5 ℃ makes this utility model holder softening, nail foot abduction with holder, insert in the fixing hole of accomplishing fluently on the bone piece with convenient, behind the holder implantable bone piece, use 40 degrees centigrade of hot salt brine hot compress holders, the restoring force that produces in holder form recovery process nature aggregates into one with the bone piece again.Need not as the prior art holder, need to be locked by external force or external parts, avoid osseous part is caused secondary damage and causes infection, affect patient's rehabilitation.

Characteristics of the present utility model:

1, simple in structure, cost of manufacture is cheap.

2, easy and simple to handle, utilize the shape restoring force of material itself to carry out the reduction of the fracture and fixing, the application of force is natural, soft.

3, the scope of application is wide, is particularly suitable for resetting of the fritter bone such as wrist nut bone fracture fixing.Also can a plurality of combined crosswise use, reach polygonal fixing purpose.

Claims

1. fracture of scaphoid bone of wrist holder comprises the back of a bow (1) and nail foot (2), it is characterized in that the described back of a bow (1) and nail foot (2) are the integral type structure, and the back of a bow (1) is connected with following closely between the foot (2) by fixing arc (4).

2. a fracture of scaphoid bone of wrist holder claimed in claim 1 is characterized in that described nail foot (2) lower end arranges nail tip (3).

3. a fracture of scaphoid bone of wrist holder claimed in claim 2 is characterized in that at least one side direction back of a bow of described nail tip (3) (1) and/or outside inclination, and axially is 15 ~ 35 ° of angles with nail foot (2).

4. fracture of scaphoid bone of wrist holder claimed in claim 1, the radius that it is characterized in that described fixedly arc (4) is 8 ~ 25cm.

5. a fracture of scaphoid bone of wrist holder claimed in claim 1 is characterized in that being 60 ~ 80 ° of angles between the described back of a bow (1) and the nail foot (2).

6. a claim 1 or 2 described fracture of scaphoid bone of wrist holders, the length that it is characterized in that described nail foot (2) is 5 ~ 15 mm.

7. a claim 1 or 5 described fracture of scaphoid bone of wrist holders, the cross-sectional width that it is characterized in that the described back of a bow (1) is 1 ~ 3 mm, thickness is 0.8 ~ 2.0mm.

8. a fracture of scaphoid bone of wrist holder claimed in claim 2 is characterized in that described nail tip (3) front end is provided with the blunt point of circular arc, and radius is 1 ~ 3mm.

9. a claim 1 or 5 described fracture of scaphoid bone of wrist holders is characterized in that being 70 ° of angles between the described back of a bow (1) and the nail foot (2).

10. a claim 1 or 2 described fracture of scaphoid bone of wrist holders, the length that it is characterized in that described nail foot (2) is 6 ~ 10 mm.