CN2820114Y - Cross locked intramedullary nail with spring dynamic cross locking holes - Google Patents
Cross locked intramedullary nail with spring dynamic cross locking holes Download PDFInfo
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- CN2820114Y CN2820114Y CN 200520017310 CN200520017310U CN2820114Y CN 2820114 Y CN2820114 Y CN 2820114Y CN 200520017310 CN200520017310 CN 200520017310 CN 200520017310 U CN200520017310 U CN 200520017310U CN 2820114 Y CN2820114 Y CN 2820114Y
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- interlocking
- hole
- nail
- elastic
- intramedullary nail
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Abstract
The utility model relates to an interlocking marrow inner nail, particularly an interlocking marrow inner nail with a spring dynamic interlocking hole, which belongs to the field of medical equipment. A nail body (10) of the interlocking marrow inner nail with a spring dynamic interlocking hole is provided with the spring dynamic interlocking hole (1), a static interlocking hole (3), a dynamic interlocking hole (4) and a tail overflow (5). The interlocking marrow inner nail with a spring dynamic interlocking hole preserves the original function and the integrity of the marrow inner nail and increases the spring dynamic function. A static force nail is not needed to be taken out for promoting the heal of the fracture in the process of the treatment, and the spring stress of a spring device in the spring dynamic interlocking hole can stimulate the generation of callus and accelerate the heal of the fracture. Through clinical tests, the interlocking marrow inner nail with a spring dynamic interlocking hole is used for scores of examples of the leg-bone fracture.
Description
(1) technical field
This utility model relates to a kind of interlocking intramedullary nail, especially a kind of interlocking intramedullary nail with elastic dynamic interlocking pin hole.Belong to medical instruments field.
(2) background technology
In the prior art, interlocking intramedullary nail is a kind of medical apparatus and instruments at the treatment of fracture back commonly used in medical instruments field.The kind of intramedullary pin is a lot, as Ender nail, self-locking intramedullary nail, rectangle nail, interlocking intramedullary nail etc.Wherein, the advantage of Ender nail, self-locking intramedullary nail, rectangle nail is the flexible fastening advantage of performance intramedullary pin, and non-stress shielding promotes fracture heals in early days; Shortcoming is anti-rotation and nonshrink short ability, and the operative indication limitation is unsuitable for early functional exercise, and the case that has needs auxiliary external fixation in early days.The advantage of interlocking intramedullary nail is fixation, and anti-rotation and nonshrink short ability are strong, and operative indication is extensive, but the postoperative early functional exercise need not the external fixation auxiliary treatment; Shortcoming is that fracture end exists stress shielding, prolongs healing time.At present the most frequently used clinically is interlocking intramedullary nail.Present most interlocking intramedullary nail still need take out static(al) and follow closely and promote union of fracture in therapeutic process after using at patient, this has increased very big misery to patient, at this shortcoming, have a lot of improved technical schemes, promptly on original interlocking intramedullary nail, increase elastic construction, produce elasticity, help the healing of fracture and stimulate callus to generate, for example, Chinese patent CN256273Y and Chinese patent CN1491617A disclose the interlocking intramedullary nail with elastic construction.But, the defective of above-mentioned patent also is fairly obvious, its elastic construction that has is to connect with elastic construction between two joint nail bodies, shortcoming is the integraty that has changed interlocking intramedullary nail, the intensity of interlocking intramedullary nail is reduced, because the effect of elastic device, have that two bodies are isolating may to be occurred, cause suffering to patient; The disclosed in addition interlocking intramedullary nail with elastic construction all can't keep the function that has conventional interlocking intramedullary nail now.
(3) utility model content
[problem that will solve]
The purpose of this utility model provides a kind of novel elastic stress interlocking intramedullary nail, the integraty and the function that keep existing conventional interlocking intramedullary nail, the high strength and the original function that had both kept whole nail do not change, utilize controlled elastic stress again, producing fine motion at fracture site stimulates callus to generate, accelerating union of bone fracture need not in therapeutic process to take out static(al) and follows closely and promote union of fracture, thereby alleviates the patient suffering.
[technical scheme]
There is the stress shield, problems such as healing time prolongation in order to solve existing conventional interlocking intramedullary nail fracture site in clinical practice.This utility model makes the fracture site shield that eliminates stress, and produces elasticity axial pressure and stimulation under the constant situation of the shape of existing conventional interlocking intramedullary nail and function.Stimulate callus to generate the accelerating union of bone fracture purpose thereby can reach.
Internal-fixed fracture elastic stress interlocking external pin is made up of interlocking intramedullary nail, elastic device, straight pin and steady pin.At intramedullary pin one end in dynamic inter-locking hole is arranged, increase an elastic dynamic interlocking pin hole, and pack in this hole elastic device, straight pin and steady pin.Straight pin is provided with the motion hole, and steady pin is fixed on straight pin in the elastic dynamic interlocking pin hole of intramedullary pin by the motion hole, and straight pin can be following fixing of steady pin, moves in set point with elastic device.
This utility model is the interlocking intramedullary nail with elastic dynamic interlocking pin hole, and it consists of: have following structure and have following accessory on nail body 10: elastic dynamic interlocking pin hole 1, and static interlocking hole 3, dynamic inter-locking hole 4 and tail emit 5;
Consisting of of above-mentioned elastic dynamic interlocking pin hole 1: undercut 7, elastic device 9, straight pin 2 and steady pin 6; Elastic device 9 preferred springs, shell fragment, elastic range is prepared into serial elastic stress interlocking external pin so that be adapted to different crowd according to different stress between 0.5-2mm.
Above-mentioned straight pin 2 and elastic device 9 are positioned in the undercut 7;
Above-mentioned elastic dynamic interlocking pin hole 1, static interlocking hole 3 can be inserted pinning interlocking intramedullary nail is fixed on the bone in the dynamic inter-locking hole 4;
Being shaped as with the pinning shape of above-mentioned straight pin 2 upper ends matches, and itself and pinning closely cooperate;
The installation manufacturing process of the interlocking intramedullary nail in above-mentioned elastic dynamic interlocking pin hole is as follows:
Special device of the present utility model makes the function of interlocking intramedullary nail that very big change take place.At first the Dynamic Elastic function of this interlocking intramedullary nail design makes fracture site the power contact occur, has but kept intramedullary pin original function and integraty.Secondly, this utility model is to have increased the elastic dynamic interlocking pin hole, and as not selecting this hole, its elastic device is invalid, and is equal to existing conventional interlocking intramedullary nail, thereby can and use cognitive custom that selectivity is provided according to the state of an illness.Elastic device can be strengthened the fracture site mobility, fracture site is produced be interrupted controlled stress stimulation, improves union of fracture, shortens the union of fracture cycle, prevents that bone from shortening, and reduces the hardship of patient's pain of injury.
[beneficial effect]
This utility model product has the following advantages:
The first, keep integraty to have identical intensity with existing conventional interlocking intramedullary nail, anti-rotation and nonshrink short ability are strong;
The second, the function of the existing conventional interlocking intramedullary nail of maintenance makes operative indication extensive;
The 3rd, need not in therapeutic process to take out static(al) and follow closely and promote union of fracture;
The 4th, utilize the elastic stress of elastic device in the elastic dynamic interlocking pin hole can stimulate callus to generate accelerating union of bone fracture.
Clinical trial shows, tibia with the fracture Canis familiaris L. is done experiment, the sub-load of about 20kg can cause the axial-periodic sexual activity of fracture end 0.5-1.0mm, compare with the strong external fixer of static state, the result shows: the test group healing rate is very obvious, has proved because oscillating load can be quickened symphysis.
(4) description of drawings
Fig. 1 is the profile of this utility model product;
Fig. 2 is the profile of the another kind of form of this utility model product;
Fig. 3 is the front view of this utility model product;
Fig. 4 is the front view of the another kind of form of this utility model product.
(5) specific embodiment
Following examples are used to illustrate this utility model, but are not used for limiting scope of the present utility model.In order more clearly to describe this utility model, in view of the apparatus that is adopted and element all are that those skilled in the art is known, just no longer each accessory are described in detail at this, its structure is formed, and overall operation and occupation mode explain as follows below in conjunction with embodiment:
At Fig. 1, Fig. 3, be that example describes with Fig. 1.Its structure of the profile of Fig. 1 is: have following structure and have following accessory on nail body 10: elastic dynamic interlocking pin hole 1, and static interlocking hole 3, dynamic inter-locking hole 4 and tail emit 5.
With hollow nail body 10, (bottom of its hollow parts is undercut 7 to put into elastic device 9 within it, entity nail can be from the nail body side surface elastic device 9 of packing into of windowing), place straight pin 2 (on straight pin 2, opening motion hole 8 in advance) thereon, pass motion hole 8 from nail body 10 sides with steady pin 6 and be fixed in the nail body, prevent that straight pin 2 breaks away from and rotation, and the movement locus of restriction straight pin 2.Reserve the space that can place pinning then above straight pin 2, it is identical that it be it seems from the outside with static interlocking hole 3, and other hollow parts can add plug in the nail body, also can keep hollow.When knochenbruch bore a heavy burden, pinning can produce pressure to straight pin 2 tops, and elastic device 9 produces elastic stresses at this moment, disappear when bearing a heavy burden, this moment, elastic device 9 with upwards effect of straight pin 2, so just made fracture site produce certain fine motion again, stimulate callus to generate accelerating union of bone fracture.
At Fig. 2, Fig. 4, be that example describes with Fig. 2.Its structure of the profile of Fig. 2 is: have following structure and have following accessory on nail body 10: elastic dynamic interlocking pin hole 1, and static interlocking hole 3, dynamic inter-locking hole 4 and tail emit 5
With hollow nail body 10, put into elastic device 9 (bottom of its hollow parts is undercut 7 bottoms) within it, place straight pin 2 (opening motion hole 8 and a circular hole 11 that is equal to static interlocking hole size at straight pin 2 in advance) thereon, pass motion hole 8 from nail body 10 sides with steady pin 6 and be fixed in the nail body, prevent that straight pin 2 breaks away from and rotation, the elastic device 9 of above straight pin 2, packing into once more then, and it is fixing that plug is added on undercut 7 tops.When the knochenbruch heavy burden, following elastic device 9 produces elastic stresses, when disappearing when bearing a heavy burden, because the gravity of knochenbruch far-end makes top elastic device 9 produce elastic stress again.
Have simultaneously and the identical intensity of one nail, anti-rotation and nonshrink short ability are strong, and operative indication is extensive; Need not in therapeutic process to take out static(al) follows closely and promotes union of fracture; Utilize the elastic stress of elastic device in the elastic dynamic interlocking pin hole can stimulate callus to generate accelerating union of bone fracture.Through clinical trial, this utility model product uses through the thigh bone fracture of tens examples, and effect is very good.
The explanation of the above specific embodiment and graphic shown in; it only is preferred embodiment of the present utility model; be not to be to restriction of the present utility model; therefore; close, identical person such as structure every and of the present utility model, device, feature all should fall within the protection domain of the present utility model.
Claims (3)
1. have the interlocking intramedullary nail in elastic dynamic interlocking pin hole, it is characterized in that: on nail body (10), have following structure and have following accessory: elastic dynamic interlocking pin hole (1), static interlocking hole (3), dynamic inter-locking hole (4) and tail emit (5).
2. interlocking intramedullary nail as claimed in claim 1 is characterized in that: the The Nomenclature Composition and Structure of Complexes in wherein said elastic dynamic interlocking pin hole (1) is: undercut (7), elastic device (9), straight pin (2) and steady pin (6).
3. interlocking intramedullary nail as claimed in claim 2 is characterized in that: wherein said elastic device (9) and straight pin (2) are positioned in the undercut (7) successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520017310 CN2820114Y (en) | 2005-04-28 | 2005-04-28 | Cross locked intramedullary nail with spring dynamic cross locking holes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520017310 CN2820114Y (en) | 2005-04-28 | 2005-04-28 | Cross locked intramedullary nail with spring dynamic cross locking holes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2820114Y true CN2820114Y (en) | 2006-09-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520017310 Expired - Fee Related CN2820114Y (en) | 2005-04-28 | 2005-04-28 | Cross locked intramedullary nail with spring dynamic cross locking holes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2820114Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011018778A1 (en) | 2009-08-13 | 2011-02-17 | Cork Institute Of Technology | Intramedullary nails for long bone fracture setting |
-
2005
- 2005-04-28 CN CN 200520017310 patent/CN2820114Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011018778A1 (en) | 2009-08-13 | 2011-02-17 | Cork Institute Of Technology | Intramedullary nails for long bone fracture setting |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |