CN205359602U - Sub - screw and adopt bone screw of this sub - screw - Google Patents
Sub - screw and adopt bone screw of this sub - screw Download PDFInfo
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- CN205359602U CN205359602U CN201521043844.0U CN201521043844U CN205359602U CN 205359602 U CN205359602 U CN 205359602U CN 201521043844 U CN201521043844 U CN 201521043844U CN 205359602 U CN205359602 U CN 205359602U
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Abstract
The utility model relates to the technical field of medical equipment, concretely relates to sub - screw and adopt bone screw of this sub - screw, sub - screw, the canned paragraph that has the section of strutting that is used for the offside bone cortex of support ribs book department and cooperate and make sub - screw quilt fix with female screw, female screw setting is on the nearside bone cortex of fracture department, the terminal surface of the section of strutting is the burnishing surface, and the group screw is during by female fix with screw, the terminal surface of the section of strutting is supporting offside bone cortex in the axial direction of the section of strutting. In the above -mentioned scheme of this application, because the terminal surface of the section of strutting is the burnishing surface, can support in the axial direction of the section of strutting and maintain the offside bone cortex after reseing with the terminal surface of the section of strutting, so make, the bone screw of this application can be applicable to compression fracture, this type of complicated fracture of the fracture of sining, and cracked bone piece is difficult to obtain well supporting and the sustaining condition through traditional bone screw.
Description
Technical field
This utility model relates to technical field of medical instruments, is specifically related to a seed screw and adopts the bone screw of this sub-screw.
Background technology
The seriality that fracture is bone structure ruptures wholly or in part, for its reason, mainly has following several situation: direct violence: violence directly acts on a certain position of skeleton and causes this position fracture, often accompanies soft tissue injury in various degree；Indirect violence: make to fracture at a distance by longitudinally conduction, leverage or twisting action during indirect violence effect；The strain of accumulation property: for a long time, repeatedly, slight directly or indirectly damage can cause a certain specific part fracture of limbs, also known as fatigue fracture.
The treatment of fracture is generally adopted replacement and fixation, after the reduction of the fracture, because of instability, it is easy to occur to shift, it is therefore desirable to be fixed, make fracture site heal gradually again.At present, conventional fixing means has extenal fixation method: adopt the devices such as clamping plate, plaster bandage, exterior fixation bracket, traction braking to be fixed；Inner fixed law: by surgical incision fracture site, adopts steel plate, draw point, intramedullary needle, bone screw etc. that fracture site is fixed.
Current bone screw, its structure usually includes rivet nut, and one end of rivet nut is sharp end, the other end is tail end, and rivet nut is provided with screw thread, by its tail end precession rivet nut, make rivet nut sequentially pass through nearside cortical bone and the offside cortical bone of fracture both sides, and then realize the connection to fracture site and fixing.
Along with going deep into of research, inventors herein have recognized that, the bone screw of said structure also exists the problem that can not avoid, and is embodied in: fracture various informative, for Fracture Simple, adopts the bone screw of said structure can play good fixing and connection effect.
But, for complicated fractures such as compression fracture, collapsed fracture and syntripsises, but no longer applicable, reason is in that following several respects:
On the one hand: after compression fracture, this kind of complicated fracture of collapsed fracture occur, sclerotin is fragmented into polylith, if still adopting traditional bone screw to be attached fixing, it is necessary to adopt multiple bone screw to coordinate fixing, make operation technique complicated, occur that iatrogenic injury risk is also very big；And for smaller fragmentation bone piece, in bone screw is difficult to puncture into, and then good connection fixed effect can not be played；
On the other hand: for compression fracture and collapsed fracture, compression fracture forms compression bone piece after occurring, collapsed fracture forms, after occurring, bone piece of subsiding, after compression bone piece or bone piece of subsiding reset, owing to the part entering offside cortical bone of bone screw is sharp end, this sharp end is on the direction along bone screw axis, it is difficult to compression bone piece or bone piece of subsiding play pressure and maintenance effect, and then is difficult to play direct supporting role to compression bone piece or bone piece of subsiding on the direction along bone screw axis；
Another further aspect: owing to compression bone piece or bone piece of subsiding can not be played direct excellent support effect on the direction along bone screw axis, so, after bone screw is fixing, compression bone piece or the bone piece of subsiding at bone screw sharp end place are susceptible to the problems such as position of bone loss, bring considerable distress to patient.
So, based on above-mentioned deficiency, need one at present badly and be applicable not only to conventional Fracture Simple, but also be applicable to compression fracture and collapsed fracture, it is possible to the bone screw structure compressing bone piece or bone piece excellent support of subsiding on the direction along bone screw axis.
Summary of the invention
The purpose of this utility model is in that exist in above-mentioned deficiency for current bone screw, one is provided to be applicable not only to conventional Fracture Simple, but also it is applicable to compression fracture and collapsed fracture, it is possible to the bone screw structure compressing bone piece or bone piece excellent support of subsiding on the direction along bone screw axis.
In order to realize foregoing invention purpose, this utility model provides techniques below scheme:
One seed screw, there is the section of strutting for supporting fracture offside cortical bone, and the canned paragraph making sub-screw be fixed that matches with female screw, described female screw is arranged in the nearside cortical bone of fracture, the end face of the described section of strutting is burnishing surface, group screw by female screw fixing time, described in the end face of the section of strutting in the section of strutting axially direction, supporting offside cortical bone.
In the such scheme of the application, owing to the end face of the section of strutting is burnishing surface, can support in the section of strutting axially direction with the end face of the section of strutting and maintain the offside cortical bone after resetting, so that, the bone screw of the application goes for compression fracture, this kind of complicated fracture of collapsed fracture, and fragmentation bone piece is difficult to be obtained the situation of excellent support and maintenance by tradition bone screw.
In actual use, first the nearside cortical bone of fracture is got out the hole matched with female screw, mother's screw is arranged in nearside cortical bone, then more sub-screw is arranged on female screw, sub-screw is made to stretch into fracture gradually, the end face of the section of strutting is pressed in offside cortical bone gradually, and then realize the support of offside cortical bone, owing to the contact jaw of the section of strutting Yu offside cortical bone is burnishing surface, the sharp end of more traditional bone screw, the application is more firm and reliable along the section of strutting support axially, and then greatly reduces the risk that the position of bone is lost；
Another further aspect, the end face being also due in the application the section of strutting is burnishing surface, for compression fracture, this kind of complicated fracture of collapsed fracture, stretch in this process gradually at sub-screw, excellent support due to the end face of the section of strutting, the section of strutting is made can actively to strut compression bone piece, bone piece of subsiding and overlapping bone piece, to compression bone piece, bone piece of subsiding and overlapping bone piece reset, that is, the sub-screw of the application is in the process stretching into fracture and carrying out fracture fixation, the effect of reseting fracture can also be played, and then simplify the operative treatment of fracture, especially for compression fracture, the operative treatment of this kind of complicated fracture of collapsed fracture, therapeutic process obtains great convenience；
Also need to further illustrate: the sub-screw in the application stretches into fracture and is supported in this process, owing to the end face of the section of strutting is burnishing surface, so, sharp end compared to tradition bone screw, the sub-screw of the application also reduces the risk scratching the iatrogenic injuries such as surrounding tissue in stretching into process, alleviate the misery of patient, also improve the curative effect of operation；
As the preferred version of the application, described in the end face edge of the section of strutting be provided with chamfering or fillet.
In such scheme, the end face edge of the section of strutting is provided with chamfering or fillet, under the premise not affecting the section of strutting end support reliability, it is to avoid the section of strutting has sharp edges, and then further the sub-screw of reduction scratches the risk of the iatrogenic injuries such as surrounding tissue in stretching into fracture process；Meanwhile, also reduce the section of strutting end face and drive reset bone piece around to move and dislocation or the risk of position of bone loss occur, further ensure that the curative effect of operation.
As preferably, described in the sidewall of the section of strutting smooth.
In the such scheme of the application, the sidewall of the section of strutting is set to smooth side wall, further reduces sub-screw in stretching into fracture process, scratch the risk of the iatrogenic injuries such as surrounding tissue；Meanwhile, also reduce the section of strutting and drive reset bone piece around to move and dislocation or the risk of position of bone loss occur, further ensure that the curative effect of operation；
Another further aspect, when adopting tradition bone screw, owing to having screw thread on transmission bone screw sidewall, so it is attached and supports surrounding tissue more or less all has in this process the iatrogenic injuries such as scuffing at entrance fracture；
What is more important, adopts traditional bone screw, owing to it to puncture entrance offside cortical bone, so, when fracture site is fixed, inherently fracture can be caused further damage；And the sub-screw of the application, can't puncture in entrance offside cortical bone, so itself also avoiding this further damage；
It addition, when bone screw removed by needs, exactly because also tradition bone screw needs to puncture entrance offside cortical bone, so its demolishing process difficulty is very big, the risk of medicine accident existed is also very big；And the sub-screw of the application is removed convenient, pull down from female screw, surrounding tissue will not be damaged.
As preferably, described in the section of strutting be cylindric.
In the such scheme of the application, the section of strutting is set to cylindric, the sub-screw processing and manufacturing making the application is simple, while ensureing that the section of strutting sidewall is smooth, also be the end face of the section of strutting it is circular cross-section, and then when the employing section of strutting end face is supported, eliminates gyrator screw and make the section of strutting end surface shape and supported the step that bone piece adapts.
As preferably, described canned paragraph is adjustable with the cooperation position of female screw, and the amount of stretching into that the section of strutting described in making stretches into fracture is adjustable.
In the such scheme of the application, canned paragraph is adjustable with the cooperation position of female screw, make, the section of strutting end face with by support bone piece contact time, the cooperation position regulating canned paragraph with female screw can be passed through, and then adjust the amount of stretching into of the section of strutting, and then the end face of the adjustment section of strutting is to being supported the force size of bone piece, make to be supported while bone piece obtains secure support and maintenance, avoid again what supported bone piece to be caused malpractice by excessive pressure, and then ensure that the reliability that the sub-screw of the application uses.
As preferably, for threadeding between described canned paragraph with female screw.
In the such scheme of the application, for threadeding between canned paragraph with female screw, first it is so that canned paragraph is adjustable with the cooperation position of female screw, simultaneously, after the section of strutting supports to place, can also prevent sub-screw from slip axially occurring, further ensure the safety and reliability of the sub-screw support of the application.
As preferably, the end of described canned paragraph is provided with disassembly and assembly structure, is realized loading and the taking-up of antithetical phrase screw by described disassembly and assembly structure.
In the such scheme of the application, disassembly and assembly structure is set in the end of canned paragraph, external auxiliary instrument by with described disassembly and assembly structure coordinate the installation and removal realizing antithetical phrase screw, facilitate the installation and removal of the sub-screw of the application.
As preferably, described disassembly and assembly structure is: changes the word cutter groove that cutter matches with a word and changes the combination of one or more in the square toes that the hexagonal indentations that the cross-shaped knife groove that cutter matches matches with inner hexagon spanner matches with box spanner with cross.
In the such scheme of the application, adopt conventional aid can realize the installation and removal of the sub-screw of the application, further facilitated the use of the sub-screw of the application.
Disclosed herein as well is a kind of bone screw that have employed above-mentioned sub-screw,
A kind of bone screw, including above-mentioned sub-screw, also include the female screw coordinated with nearside Cortex Lycii, be connected for dismountable between described female screw and described sub-screw, when female screw and sub-screw are installed and are put in place, described in the end face of the section of strutting in the section of strutting axially direction, supporting offside cortical bone.
The bone screw of the application is owing to have employed above-mentioned sub-screw, so it has the technique effect that above-mentioned sub-screw can reach, the application is creationary is set to knockdown structure by bone screw, sub-screw is adopted to realize the support to offside cortical bone and active distraction reduction, female screw is adopted to realize the anti-skidding of bone screw with sub-screw fit, the bone screw making the application can be applied not only to the support to subside bone piece and the complicated fractures such as bone piece of subsiding, can also actively strut compression bone piece, bone piece of subsiding and overlapping bone piece, to compression bone piece, bone piece of subsiding and overlapping bone piece reset, simplify operation process, reduce operation risk, improve surgical quality, but also it is prevented from the slip of bone screw, improve the safety and reliability of the application bone screw further, ensure curative effect；
On the other hand, due to the application bone screw, it is possible to the good quality being applicable to complicated fracture, reduce fracture constricted zone and implant autologous or allograph bone necessity, decrease patient's expenditure, alleviate the misery of patient.
As preferably, described female screw includes installation portion and guide part, and described installation portion is for being connected with nearside cortical bone, and described guide part guides described sub-screw to extend into the offside cortical bone place of fracture.
In the application such scheme, female screw includes installation portion and guide part, connection by installation portion Yu nearside cortical bone, realize the fixing of the application bone screw, by arranging guide part, guide sub-screw to stretch into fracture and offside cortical bone is supported, it is ensured that sub-screw does not offset in stretching into process, accurately offside cortical bone can be supported, and then ensure that the safety and reliability of the application bone screw.
As preferably, described female screw has the through hole running through described installation portion and guide part, is provided with the screw thread that described sub-screw matches in described through hole, and the section of strutting of described sub-screw extend into fracture through described through hole.
In the such scheme of the application, by arranging through hole, sub-screw extend into fracture again after through hole, installation portion and guide part is run through due to through hole, there is longer length, it is provided with the screw thread matched with sub-screw in through hole, is first improve the reliability being connected between sub-screw with female screw；Meanwhile, through hole, while playing connexon screw and female screw, also also acts as antithetical phrase screw guide effect, so, also it is further ensured that sub-screw can stretch into fracture accurately；Another further aspect, owing to the length of through hole increases, its interior screw thread also increases, and then further increases sub-screw and stretch into the scalable amount of fracture built-in length, further increases the use scope of the application bone screw；On the other hand, when mother's screw is connected with nearside cortical bone, first holes in nearside cortical bone, then again mother's screw is arranged in nearside cortical bone, during connection, guide part is introduced in the boring of nearside cortical bone, so, the wire portion of mother's the application screw, not only act as the guide effect of antithetical phrase screw, also in installation process, female screw is played guide effect, it is ensured that female screw and being smoothed out that nearside cortical bone is connected simultaneously, further facilitate the use of the application bone screw.
As preferably, it is smooth surface outside described guide part.
In the such scheme of the application, it is smooth surface outside guide part, is first to ensure that and avoids guide part lateral surface to scratch surrounding tissue, be also convenient in the boring that guide part enters into nearside cortical bone smoothly meanwhile.
As preferably, the installation portion of described female screw being provided with screw thread, described installation portion is threadeded with the nearside cortical bone of fracture.
In the such scheme of the application, the installation portion of female screw is threaded, female screw is threadeded with the nearside cortical bone of fracture, it is ensured that the reliability being connected between female screw and nearside cortical bone, and then avoids the bone screw of the application to occur slip can not reliably fix the risk of offside cortical bone；Simultaneously as threadeding between female screw and nearside cortical bone, facilitate the application bone screw and connection between nearside cortical bone and dismounting；On the one hand, female screw is also made to stretch into the adjustable length of nearside cortical bone, so can coordinate mutually with the built-in length of sub-screw, control the application bone screw and support the pressure dynamics of offside cortical bone, and then, further increase the range of accommodation of the application bone screw amount of stretching into, also improve the use scope of the application bone screw.
As preferably, described female screw being provided with disassembly and assembly structure, being realized the connection to female screw and nearside cortical bone and dismounting by described disassembly and assembly structure, the disassembly and assembly structure on female screw is identical with the disassembly and assembly structure on sub-screw.While convenient female screw installing/dismounting, it is possible to adopt same set of instrument antithetical phrase screw and female screw to mount and dismount, further facilitated the use of the application bone screw.
Compared with prior art, the beneficial effect of this utility model bone screw:
1, the bone screw of the application goes for compression fracture, this kind of complicated fracture of collapsed fracture, and fragmentation bone piece is difficult to be obtained the situation of excellent support and maintenance by tradition bone screw；
2, the contact jaw having the application sub-screw section of strutting and offside cortical bone is burnishing surface, the sharp end of more traditional bone screw, and the sub-screw of the application, more firm and reliable along the section of strutting support axially, greatly reduces the risk of position of bone loss；
3, the sub-screw of the application is in the process stretching into fracture and carrying out fracture fixation, the effect of reseting fracture can also be played, and then simplify the operative treatment of fracture, especially for compression fracture, this kind of complicated fracture of collapsed fracture operative treatment, therapeutic process obtains great convenience；
4, stretch into fracture at the sub-screw of the application and be supported in this process, owing to the end face of the section of strutting is burnishing surface, so, sharp end compared to tradition bone screw, the sub-screw of the application also reduces the risk scratching the iatrogenic injuries such as surrounding tissue in stretching into process, alleviate the misery of patient, also improve the curative effect of operation.
5, due to the application bone screw, it is possible to the good quality being applicable to complicated fracture, reduce fracture constricted zone and implant autologous or allograph bone necessity, decrease patient's expenditure, alleviate the misery of patient.
The beneficial effect of other embodiments of the application:
1, the sidewall of the section of strutting is set to smooth side wall, further reduces sub-screw and scratches the risk of the iatrogenic injuries such as surrounding tissue in stretching into fracture process；
2, the sidewall of the section of strutting is set to smooth side wall, also reduces the section of strutting and drives reset bone piece around to move and dislocation or the risk of position of bone loss occur, further ensure that the curative effect of operation；
3, the sub-screw of the application, can't puncture in entrance offside cortical bone, so itself also avoiding fracture is further damaged；
4, the sub-screw of the application is removed convenient, pulls down, will not damage surrounding tissue from female screw；
5, by regulating the cooperation position of canned paragraph and female screw, and then adjust the amount of stretching into of the section of strutting, and then the end face of the adjustment section of strutting is to being supported the force size of bone piece, make to be supported while bone piece obtains secure support and maintenance, avoid again what supported bone piece to be caused malpractice by excessive pressure, and then ensure that the reliability that the sub-screw of the application uses.
The beneficial effect of this utility model bone screw:
1, the bone screw of the application is owing to have employed above-mentioned sub-screw, so it has the technique effect that above-mentioned sub-screw can reach；
2, the application is creationary is set to knockdown structure by bone screw, sub-screw is adopted to realize the support to offside cortical bone and active distraction reduction, female screw is adopted to realize the anti-skidding of bone screw with sub-screw fit, the bone screw making the application can be applied not only to the support to subside bone piece and the complicated fractures such as bone piece of subsiding, can also actively strut compression bone piece, bone piece of subsiding and overlapping bone piece, to compression bone piece, bone piece of subsiding and overlapping bone piece reset, simplify operation process, reduce operation risk, improve surgical quality, but also it is prevented from the slip of bone screw, improve the safety and reliability of the application bone screw further, ensure curative effect.
Accompanying drawing illustrates:
Fig. 1 is the structural representation of the application bone screw；
Fig. 2 is the structural representation of the sub-screw of the application；
Fig. 3 is the structural representation of mother's the application screw,
Labelling in figure:
1-screw, mother's 2-screw, the 3-section of strutting, 4-canned paragraph, 5-disassembly and assembly structure, 6-installation portion, 7-guide part, 8-through hole.
Detailed description of the invention
Below in conjunction with test example and detailed description of the invention, this utility model is described in further detail.But this should not being interpreted as, the scope of the above-mentioned theme of this utility model is only limitted to below example, and all technology realized based on this utility model content belong to scope of the present utility model.
Embodiment 1,
As shown in Figure 1,2 and 3, one seed screw, there is the section of strutting 3 for supporting fracture offside cortical bone, and the canned paragraph 4 making sub-screw 1 be fixed that matches with female screw 2, described female screw 2 is arranged in the nearside cortical bone of fracture, the end face of the described section of strutting 3 is burnishing surface, when group screw 1 is fixed by female screw 2, described in the end face of the section of strutting 3 in the section of strutting 3 axially direction, supporting offside cortical bone.
In the such scheme of the present embodiment, owing to the end face of the section of strutting 3 is burnishing surface, can support in the section of strutting 3 axially direction with the end face of the section of strutting 3 and maintain the offside cortical bone after resetting, so that, the bone screw of the present embodiment goes for compression fracture, this kind of complicated fracture of collapsed fracture, and fragmentation bone piece is difficult to be obtained the situation of excellent support and maintenance by tradition bone screw.
In actual use, first the nearside cortical bone of fracture is got out the hole matched with female screw 2, mother's screw 2 is arranged in nearside cortical bone, then more sub-screw 1 is arranged on female screw 2, sub-screw 1 is made to stretch into fracture gradually, the end face of the section of strutting 3 is pressed in offside cortical bone gradually, and then realize the support of offside cortical bone, owing to the contact jaw of the section of strutting 3 with offside cortical bone is burnishing surface, the sharp end of more traditional bone screw, the present embodiment is more firm and reliable along the section of strutting 3 support axially, and then greatly reduce the risk that the position of bone is lost；
Another further aspect, the end face being also due in the present embodiment the section of strutting 3 is burnishing surface, for compression fracture, this kind of complicated fracture of collapsed fracture, stretch in this process gradually at sub-screw 1, excellent support due to the end face of the section of strutting 3, the section of strutting 3 is made can actively to strut compression bone piece, bone piece of subsiding and overlapping bone piece, to compression bone piece, bone piece of subsiding and overlapping bone piece reset, that is, the sub-screw 1 of the present embodiment is in the process stretching into fracture and carrying out fracture fixation, the effect of reseting fracture can also be played, and then simplify the operative treatment of fracture, especially for compression fracture, the operative treatment of this kind of complicated fracture of collapsed fracture, therapeutic process obtains great convenience；
Also need to further illustrate: the sub-screw 1 at the present embodiment stretches into fracture and is supported in this process, owing to the end face of the section of strutting 3 is burnishing surface, so, sharp end compared to tradition bone screw, the sub-screw 1 of the present embodiment also reduces the risk scratching the iatrogenic injuries such as surrounding tissue in stretching into process, alleviate the misery of patient, also improve the curative effect of operation；
Embodiment 2:
As shown in Figure 1,2 and 3, sub-screw 1 as described in Example 1, described in the end face edge of the section of strutting 3 be provided with chamfering or fillet, described in the sidewall of the section of strutting 3 smooth, described in the section of strutting 3 be cylindric.
In such scheme, the end face edge of the section of strutting 3 is provided with chamfering or fillet, under the premise not affecting the section of strutting 3 end support reliability, avoid the section of strutting 3 to have sharp edges, and then further the sub-screw 1 of reduction scratches the risk of the iatrogenic injuries such as surrounding tissue in stretching into fracture process；Meanwhile, also reduce the section of strutting 3 end face and drive reset bone piece around to move and dislocation or the risk of position of bone loss occur, further ensure that the curative effect of operation；
In the such scheme of the present embodiment, the sidewall of the section of strutting 3 is set to smooth side wall, further reduces sub-screw 1 in stretching into fracture process, scratch the risk of the iatrogenic injuries such as surrounding tissue；Meanwhile, also reduce the section of strutting 3 and drive reset bone piece around to move and dislocation or the risk of position of bone loss occur, further ensure that the curative effect of operation；
Another further aspect, when adopting tradition bone screw, owing to having screw thread on transmission bone screw sidewall, so it is attached and supports surrounding tissue more or less all has in this process the iatrogenic injuries such as scuffing at entrance fracture；
What is more important, adopts traditional bone screw, owing to it to puncture entrance offside cortical bone, so, when fracture site is fixed, inherently fracture can be caused further damage；And the sub-screw 1 of the present embodiment, can't puncture in entrance offside cortical bone, so itself also avoiding this further damage；
It addition, when bone screw removed by needs, exactly because also tradition bone screw needs to puncture entrance offside cortical bone, so its demolishing process difficulty is very big, the risk of medicine accident existed is also very big；And the sub-screw 1 of the present embodiment is removed convenient, pull down from female screw 2, surrounding tissue will not be damaged；
In the such scheme of the present embodiment, the section of strutting 3 is set to cylindric, sub-screw 1 processing and manufacturing making the present embodiment is simple, while ensureing that the section of strutting 3 sidewall is smooth, also be the end face of the section of strutting 3 it is circular cross-section, and then when the employing section of strutting 3 end face is supported, eliminates gyrator screw 1 and make the section of strutting 3 end surface shape and supported the step that bone piece adapts.
Embodiment 3:
Such as Fig. 1, shown in 2 and 3, sub-screw 1 as described in embodiment 1 or 2, described canned paragraph 4 is adjustable with the cooperation position of female screw 2, the amount of stretching into that the section of strutting 3 described in making stretches into fracture is adjustable, for threadeding between described canned paragraph 4 with female screw 2, the end of described canned paragraph 4 is provided with disassembly and assembly structure 5, loading and the taking-up of antithetical phrase screw 1 is realized by described disassembly and assembly structure 5, described disassembly and assembly structure 5 is: change the word cutter groove that cutter matches with a word, the cross-shaped knife groove that cutter matches is changed with cross, the hexagonal indentations matched with inner hexagon spanner, the combination of one or more in the square toes matched with box spanner.
In the such scheme of the present embodiment, canned paragraph 4 is adjustable with the cooperation position of female screw 2, make, the section of strutting 3 end face with by support bone piece contact time, the cooperation position regulating canned paragraph 4 with female screw 2 can be passed through, and then adjust the amount of stretching into of the section of strutting 3, and then the end face of the adjustment section of strutting 3 is to being supported the force size of bone piece, make to be supported while bone piece obtains secure support and maintenance, avoid again what supported bone piece to be caused malpractice by excessive pressure, and then ensure that the reliability that the sub-screw 1 of the present embodiment uses.
In the such scheme of the present embodiment, for threadeding between canned paragraph 4 with female screw 2, first it is so that canned paragraph 4 is adjustable with the cooperation position of female screw 2, simultaneously, after the section of strutting 3 supports to place, can also prevent sub-screw 1 from slip axially occurring, further ensure the safety and reliability that the sub-screw 1 of the present embodiment supports.
In the such scheme of the present embodiment, disassembly and assembly structure 5 is set in the end of canned paragraph 4, external auxiliary instrument by with described disassembly and assembly structure 5 coordinate the installation and removal realizing antithetical phrase screw 1, facilitate the installation and removal of the sub-screw 1 of the present embodiment.
In the such scheme of the present embodiment, adopt conventional aid can realize the installation and removal of the sub-screw 1 of the present embodiment, further facilitated the use of the sub-screw 1 of the present embodiment.
Embodiment 4,
As shown in Figure 1,2 and 3, a kind of bone screw, including the sub-screw 1 described in embodiment 1-3 any one, also include the female screw 2 coordinated with nearside Cortex Lycii, it is connected for dismountable between described female screw 2 and described sub-screw 1, when female screw 2 and sub-screw 1 are installed and are put in place, described in the end face of the section of strutting 3 in the section of strutting 3 axially direction, supporting offside cortical bone.
The bone screw of the present embodiment is owing to have employed above-mentioned sub-screw 1, so it has the technique effect that above-mentioned sub-screw 1 can reach, the present embodiment is creationary is set to knockdown structure by bone screw, sub-screw 1 is adopted to realize the support to offside cortical bone and active distraction reduction, adopt female screw 2 to coordinate with sub-screw 1 and realize the anti-skidding of bone screw, the bone screw making the present embodiment can be applied not only to the support to subside bone piece and the complicated fractures such as bone piece of subsiding, can also actively strut compression bone piece, bone piece of subsiding and overlapping bone piece, to compression bone piece, bone piece of subsiding and overlapping bone piece reset, simplify operation process, reduce operation risk, improve surgical quality, but also it is prevented from the slip of bone screw, improve the safety and reliability of the present embodiment bone screw further, ensure curative effect；
On the other hand, due to the present embodiment bone screw, it is possible to the good quality being applicable to complicated fracture, reduce fracture constricted zone and implant autologous or allograph bone necessity, decrease patient's expenditure, alleviate the misery of patient.
Embodiment 5,
Such as Fig. 1, shown in 2 and 3, bone screw as described in Example 4, described female screw 2 includes installation portion 6 and guide part 7, described installation portion 6 is for being connected with nearside cortical bone, described guide part 7 guides described sub-screw 1 to extend into the offside cortical bone place of fracture, described female screw 2 has the through hole 8 running through described installation portion 6 and guide part 7, the screw thread that described sub-screw 1 matches it is provided with in described through hole 8, the section of strutting 3 of described sub-screw 1 extend into fracture through described through hole 8, it is smooth surface outside described guide part 7, the installation portion 6 of described female screw 2 is provided with screw thread, described installation portion 6 is threadeded with the nearside cortical bone of fracture.
In the present embodiment such scheme, female screw 2 includes installation portion 6 and guide part 7, connection by installation portion 6 with nearside cortical bone, realize the fixing of the present embodiment bone screw, by arranging guide part 7, guide sub-screw 1 to stretch into fracture and offside cortical bone is supported, it is ensured that sub-screw 1 does not offset in stretching into process, accurately offside cortical bone can be supported, and then ensure that the safety and reliability of the present embodiment bone screw.
In the such scheme of the present embodiment, by arranging through hole 8, sub-screw 1 extend into fracture again after through hole 8, installation portion 6 and guide part 7 is run through due to through hole 8, there is longer length, it is provided with the screw thread matched with sub-screw 1 in through hole 8, is first improve the reliability being connected between sub-screw 1 with female screw 2；Meanwhile, through hole 8, while playing connexon screw 1 and female screw 2, also also acts as antithetical phrase screw 1 guide effect, so, also it is further ensured that sub-screw 1 can stretch into fracture accurately；Another further aspect, owing to the length of through hole 8 increases, its interior screw thread also increases, and then further increases sub-screw 1 and stretch into the scalable amount of fracture built-in length, further increases the use scope of the present embodiment bone screw；On the other hand, when mother's screw 2 is connected with nearside cortical bone, first hole in nearside cortical bone, then again mother's screw 2 is arranged in nearside cortical bone, during connection, guide part 7 is introduced in the boring of nearside cortical bone, so, the wire portion of the present embodiment mother's screw 2, not only act as the guide effect of antithetical phrase screw 1, also in installation process, female screw 2 is played guide effect, it is ensured that female screw 2 and being smoothed out that nearside cortical bone is connected simultaneously, further facilitate the use of the present embodiment bone screw.
In the such scheme of the present embodiment, it is smooth surface outside guide part 7, is first to ensure that and avoids guide part 7 lateral surface to scratch surrounding tissue, be also convenient in the boring that guide part 7 enters into nearside cortical bone smoothly meanwhile.
In the such scheme of the present embodiment, the installation portion 6 of female screw 2 is threaded, female screw 2 is threadeded with the nearside cortical bone of fracture, ensure the reliability being connected between female screw 2 and nearside cortical bone, and then avoid the bone screw of the present embodiment to occur slip can not reliably fix the risk of offside cortical bone；Simultaneously as threadeding between female screw 2 and nearside cortical bone, facilitate the present embodiment bone screw and connection between nearside cortical bone and dismounting；On the one hand, female screw 2 is also made to stretch into the adjustable length of nearside cortical bone, so can coordinate mutually with the built-in length of sub-screw 1, control the present embodiment bone screw and support the pressure dynamics of offside cortical bone, and then, further increase the range of accommodation of the present embodiment bone screw amount of stretching into, also improve the use scope of the present embodiment bone screw.
Preferably, described female screw 2 being provided with disassembly and assembly structure 5, realized the connection to female screw 2 and nearside cortical bone and dismounting by described disassembly and assembly structure 5, the disassembly and assembly structure 5 on female screw 2 is identical with the disassembly and assembly structure 5 on sub-screw 1.While convenient female screw 2 installing/dismounting, it is possible to adopt same set of instrument antithetical phrase screw 1 and female screw 2 to mount and dismount, further facilitated the use of the application bone screw.
Above example only in order to this utility model is described and and technical scheme described by unrestricted this utility model, although this utility model is had been carried out describing in detail by this specification with reference to each above-mentioned embodiment, but this utility model is not limited to above-mentioned detailed description of the invention, therefore any this utility model modified or equivalent replaces；And all are without departing from the technical scheme of spirit and scope of invention and improvement thereof, it all should be encompassed in the middle of right of the present utility model.
Claims (10)
1. a seed screw, it is characterised in that: there is the section of strutting for supporting fracture offside cortical bone, and the canned paragraph making sub-screw be fixed that matches with female screw, described in the end face of the section of strutting be burnishing surface.
2. sub-screw as claimed in claim 1, it is characterised in that: described in the sidewall of the section of strutting smooth.
3. sub-screw as claimed in claim 1, it is characterised in that: described canned paragraph is adjustable with the cooperation position of female screw, and the amount of stretching into that the section of strutting described in making stretches into fracture is adjustable.
4. sub-screw as claimed in claim 1, it is characterised in that: for threadeding between described canned paragraph with female screw.
5. sub-screw as claimed in claim 1, it is characterised in that: the end of described canned paragraph is provided with disassembly and assembly structure, is realized loading and the taking-up of antithetical phrase screw by described disassembly and assembly structure.
6. sub-screw as claimed in claim 5, it is characterised in that: described disassembly and assembly structure is: changes the word cutter groove that cutter matches with a word and changes the combination of one or more in the square toes that the hexagonal indentations that the cross-shaped knife groove that cutter matches matches with inner hexagon spanner matches with box spanner with cross.
7. a bone screw, it is characterized in that: include the sub-screw described in any one of claim 1-6, also include the female screw coordinated with nearside Cortex Lycii, it is connected for dismountable between described female screw and described sub-screw, when female screw and sub-screw are installed and are put in place, described in the end face of the section of strutting in the section of strutting axially direction, supporting offside cortical bone.
8. bone screw as claimed in claim 7, it is characterised in that: described female screw includes installation portion and guide part, and described installation portion is for being connected with nearside cortical bone, and described guide part guides described sub-screw to extend into the offside cortical bone place of fracture.
9. bone screw as claimed in claim 8, it is characterized in that: described female screw has the through hole running through described installation portion and guide part, being provided with the screw thread that described sub-screw matches in described through hole, the section of strutting of described sub-screw extend into fracture through described through hole.
10. bone screw as claimed in claim 9, it is characterised in that: it is smooth surface outside described guide part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521043844.0U CN205359602U (en) | 2015-12-15 | 2015-12-15 | Sub - screw and adopt bone screw of this sub - screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521043844.0U CN205359602U (en) | 2015-12-15 | 2015-12-15 | Sub - screw and adopt bone screw of this sub - screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205359602U true CN205359602U (en) | 2016-07-06 |
Family
ID=56280612
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521043844.0U Expired - Fee Related CN205359602U (en) | 2015-12-15 | 2015-12-15 | Sub - screw and adopt bone screw of this sub - screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205359602U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105342678A (en) * | 2015-12-15 | 2016-02-24 | 徐强 | Secondary screw and bone screw adopting same |
| CN106618705A (en) * | 2017-01-23 | 2017-05-10 | 南京鼓楼医院 | Flexible connecting vertebral pedicle screw |
-
2015
- 2015-12-15 CN CN201521043844.0U patent/CN205359602U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105342678A (en) * | 2015-12-15 | 2016-02-24 | 徐强 | Secondary screw and bone screw adopting same |
| CN106618705A (en) * | 2017-01-23 | 2017-05-10 | 南京鼓楼医院 | Flexible connecting vertebral pedicle screw |
| CN106618705B (en) * | 2017-01-23 | 2018-09-21 | 南京鼓楼医院 | A kind of flexible connection pedicle screw |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160706 Termination date: 20181215 |