CN102232863A - Intramedullary nail device - Google Patents
Intramedullary nail device Download PDFInfo
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- CN102232863A CN102232863A CN2010101535867A CN201010153586A CN102232863A CN 102232863 A CN102232863 A CN 102232863A CN 2010101535867 A CN2010101535867 A CN 2010101535867A CN 201010153586 A CN201010153586 A CN 201010153586A CN 102232863 A CN102232863 A CN 102232863A
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- screw
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- intramedullary pin
- lag screw
- lag
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Abstract
The invention discloses an intramedullary nail device, which comprises an intramedullary nail device and a lag screw, wherein the far end and near end of the intramedullary nail are not in the same straight line, the intramedullary nail has a long through hole in axial direction, and the near end of the intramedullary nail has an oblique pull hole; when used, the lag screw cooperates with the pull force of an intramedullary nail rod, the lag screw comprises a threaded lag screw and a pressurizing and anti-rotation screw, which are matched with each other; the front end of the threaded lag screw is provided with external threads; an arc-shaped groove is formed on the side face of the threaded lag screw; the rear end of the arc-shaped groove is provided with a plurality of racks which are vertical to the arc-shaped groove and are uniformly spaced; a positioning groove is formed on the tail end of the threaded lag screw; the radian measure of the surface of the pressurizing and anti-rotation screw is the same as that of the arc-shaped groove of the threaded lag screw; the pressurizing and anti-rotation screw consists of a screw positioned on at a front end and a cylinder positioned at the rear end; the diameter of the cylinder is a little bit greater than that of the screw; and the threads on the screw are connected with the jack threads of the threaded lag screw. The intramedullary nail device has a simple structure and can effectively prevent the lag screw from rotating, and after being fixed, the lag screw is stable and reliable.
Description
Technical field
The present invention relates to the orthopedic fixation device tool, particularly a kind of intramedullary pin.
Background technology
When fracture takes place in human skeleton, can use intramedullary pin to connect knochenbruch usually, intramedullary pin generally means the long steel nail that is placed in the medullary cavity.Such as the femur and the tibia of lower limb, after an end of bone is opened wound and put into intramedullary pin, lag screw and staple are installed respectively at the near-end and the far-end of intramedullary pin, can prevent the rotation and the shortening of bone.Usually the hole of the lag screw of installing on the intramedullary pin is designed to circle, and after columniform lag screw installation was mixed in circular pulling force hole, the rubbish screw rotated easily, brings incompatible sense to the wounded, even pain.In the surgical operation of treatment fracture; usually can use intramedullary pin and fix fracture site; intramedullary pin needs lag screw to be fixed on the human skeleton; when physical activity; capital movement tendency is to want to shake off out hanging tight of lag screw; be that lag screw has the trend that withdraws from the femoral head; the anti-power of cutting out of the lag screw of screw-type structure is less; the pressure that in squeezing into the process of skeleton skeleton is formed is less, so the lag screw of screw-type structure is loosening easily after installation.
Summary of the invention
The object of the present invention is to provide a kind of intramedullary pin, simple in structure, can prevent effectively that lag screw from rotating, the fixing back of lag screw is reliable and stable.
The technical scheme that realizes the object of the invention is: intramedullary pin comprises intramedullary pin and lag screw; Intramedullary pin far-end and near-end and are axially arranged with long through-hole not on same straight line, near-end is provided with oblique pulling force hole; When lag screw uses and the pulling force hole of intramedullary pin bar closely cooperates, comprise the screw thread lag screw and the anti-screw that revolves of pressurization that cooperatively interact, the front end of screw thread lag screw is provided with external screw thread, the side is provided with arcuate groove, the rear end of arcuate groove is provided with many vertical with it and uniform tooth bars of being separated by, and the afterbody of screw thread lag screw is provided with locating slot; Pressurization is anti-, and to revolve the radian on screw surface identical with the radian of the arcuate groove of screw thread lag screw, the anti-screw that revolves of pressurization is made up of screw that is positioned at front end and the cylinder that is positioned at the rear end, the diameter of cylinder is a bit larger tham the diameter of screw, and the screw thread of screw can be threaded with the tooth bar of screw thread lag screw.
The far-end of described intramedullary pin is provided with elongated slot and locking hole successively, and elongated slot is divided into two with the termination of far-end; The pulling force hole is divided into the big hole that cooperates with the screw thread lag screw and revolves the small sircle hole of screw fit with pressurization is anti-, and the axis of big hole and small sircle hole is parallel, and big hole and small sircle hole are overlapped;
The rear of the long through-hole of described intramedullary pin is followed successively by the sealing cap screw and compresses screw, and the sealing cap screw is used to connect sealing cap.
The elongated slot of described intramedullary pin is divided into symmetric two with the termination of intramedullary pin far-end.
The diameter of the small sircle hole upper end in the pulling force hole of described intramedullary pin is less than the diameter of lower end.
The afterbody of the near-end of described intramedullary pin also is provided with groove.
The screw thread lag screw of described lag screw be axially arranged with through hole, the rear end of through hole is an internal thread hole.
The pressurization of described lag screw is anti-revolve screw cylinder axially be provided with screwed hole and hexagon ring from the inside to the outside successively.
Intramedullary pin also comprises housing screw; Described housing screw is assemblied in compressing in the screw of intramedullary pin bar.
The present invention has following beneficial effect: (1) pulling force of the present invention hole is divided into big hole and small sircle hole, the axis of big hole and small sircle hole is parallel, and big hole and small sircle hole are overlapped, after this structure makes and squeezes into corresponding lag screw in the pulling force hole, lag screw can not rotate, and is more stable after lag screw is fixing.Pressurization is anti-, and to revolve the radian on screw surface identical with the radian of the arcuate groove of screw thread lag screw, and this structure makes the anti-screw that revolves of pressurization can effectively prevent the rotation of screw thread lag screw, makes the fixing-stable of screw thread lag screw reliable.
(2) rear of long through-hole of the present invention is followed successively by the sealing cap screw and compresses screw, this structure make compress in the screw clamp nut is installed after, clamp nut can compress lag screw, makes lag screw be not easy to produce and slides.
(3) elongated slot of the present invention is divided into symmetric two with the termination of intramedullary pin far-end, and this structure makes the termination of intramedullary pin far-end have the effect of decompression.
(4) diameter of the small sircle hole in pulling force of the present invention hole upper end is less than the diameter of lower end, and this structure can provide localized effect to lag screw.
(5) afterbody of near-end of the present invention is provided with groove, and this structure can be assisted the installation of intramedullary pin.
(6) screw thread lag screw of the present invention be axially arranged with through hole, the rear end of through hole is an internal thread hole, this structure makes the rear end of screw thread lag screw that pressure cap can be installed, and through hole can play decompressing effect, the effective blood that increases bone supplies.
(7) the anti-cylinder that revolves screw of pressurization of the present invention axially be provided with screwed hole and hexagon ring from the inside to the outside successively, this structure makes the anti-screw that revolves of pressurization to screw in easily in the circular hole between screw thread lag screw and the intramedullary pin by supporting instrument.
Description of drawings
For the easier quilt of content of the present invention is clearly understood, according to specific embodiment also in conjunction with the accompanying drawings, the present invention is further detailed explanation, wherein below
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the structural representation of intramedullary pin.
Fig. 3 is the structural representation of the far-end of intramedullary pin.
Fig. 4 is the structural representation in the pulling force hole of intramedullary pin.
Fig. 5 is the structural representation of afterbody of the near-end of intramedullary pin.
Fig. 6 is a structural representation of the present invention.
Fig. 7 is the upward view of Fig. 6.
Fig. 8 is the structural representation of screw thread lag screw.
Fig. 9 is the structural representation of the front end of screw thread lag screw.
Figure 10 is the upward view of Fig. 8.
Figure 11 is the anti-structural representation that revolves screw of pressurization.
Figure 12 is the upward view of Figure 11.
Label is in the accompanying drawing:
Long through-hole 1, sealing cap screw 11, compress screw 12, elongated slot 2, locking hole 3, pulling force hole 4, big hole 41, small sircle hole 42, groove 5, screw thread lag screw 6, external screw thread 61, arcuate groove 62, tooth bar 63, locating slot 64, through hole 65, anti-screw 7, screw 71, cylinder 72, screwed hole 72-1, hexagon ring 72-2, the housing screw 8 of revolving of pressurization.
The specific embodiment
(embodiment 1)
See Fig. 1 to Figure 12, the intramedullary pin of present embodiment comprises intramedullary pin and lag screw.
The far-end of intramedullary pin and near-end and are axially arranged with long through-hole 1 not on same straight line, the rear of long through-hole 1 is followed successively by sealing cap screw 11 and compresses screw 12, and sealing cap screw 11 is used to connect sealing cap.The far-end of intramedullary pin is provided with elongated slot 2 and locking hole 3 successively, and elongated slot 2 is divided into symmetric two with the termination of intramedullary pin far-end.The near-end of intramedullary pin is provided with oblique pulling force hole 4, and pulling force hole 4 is divided into big hole 41 and small sircle hole 42, and big hole 41 is parallel with the axis of small sircle hole 42, and big hole 41 and small sircle hole 42 overlap, and the diameter of small sircle hole 42 upper ends is less than the diameter of lower end.The afterbody of the near-end of intramedullary pin also is provided with groove 5.
The anti-screw 7 that revolves of screw thread lag screw 6 and pressurization.The front end of screw thread lag screw 6 is provided with external screw thread 61, the side is provided with arcuate groove 62, the rear end of arcuate groove 62 is provided with many vertical with it and uniform tooth bars 63 of being separated by, the afterbody of screw thread lag screw 6 is provided with locating slot 64, screw thread lag screw 6 be axially arranged with through hole 65, the rear end of through hole 65 is an internal thread hole.Pressurization is anti-, and to revolve the radian on screw 7 surfaces identical with the radian of the arcuate groove 62 of screw thread lag screw 6, see figure and Fig. 7, the anti-screw 7 that revolves of pressurization is made up of screw 71 that is positioned at front end and the cylinder 72 that is positioned at the rear end, the diameter of cylinder 72 is a bit larger tham the diameter of screw 71, the screw thread of screw 71 can be threaded with the tooth bar 63 of screw thread lag screw 6, cylinder 72 axially be provided with screwed hole 72-1 and hexagon ring 72-2 from the inside to the outside successively.
Housing screw 8 is assemblied in compressing in the screw 11-2 of intramedullary pin bar 1.
Should be appreciated that specific embodiment described above only is used to explain the present invention, and be not used in qualification the present invention.Conspicuous variation of being extended out by spirit of the present invention or change still are among protection scope of the present invention.
Claims (9)
1. an intramedullary pin comprises intramedullary pin and lag screw; It is characterized in that: intramedullary pin far-end and near-end and are axially arranged with long through-hole (1) not on same straight line, near-end is provided with oblique pulling force hole (4); When lag screw uses and the pulling force hole (4) of intramedullary pin bar closely cooperates, comprise the screw thread lag screw (6) and the anti-screw (7) that revolves of pressurization that cooperatively interact, the front end of screw thread lag screw (6) is provided with external screw thread (61), the side is provided with arcuate groove (62), the rear end of arcuate groove (62) is provided with many vertical with it and uniform tooth bars (63) of being separated by, and the afterbody of screw thread lag screw (6) is provided with locating slot (64); It is identical with the radian of the arcuate groove (62) of screw thread lag screw (6) that pressurization prevents revolving the surperficial radian of screw (7), pressurization is anti-revolves screw (7) and is made up of screw that is positioned at front end (71) and the cylinder (72) that is positioned at the rear end, the diameter of cylinder (72) is a bit larger tham the diameter of screw (71), and the screw thread of screw (71) can be threaded with the tooth bar (63) of screw thread lag screw (6).
2. intramedullary pin according to claim 1 is characterized in that: the far-end of described intramedullary pin is provided with elongated slot (2) and locking hole (3) successively, and elongated slot (2) is divided into two with the termination of far-end; Pulling force hole (4) is divided into the big hole (41) that cooperates with screw thread lag screw (6) and revolves the small sircle hole (42) that screw (7) cooperates with pressurization is anti-, and big hole (41) is parallel with the axis of small sircle hole (42), and big hole (41) and small sircle hole (42) are overlapped.
3. intramedullary pin according to claim 2 is characterized in that: the rear of the long through-hole of described intramedullary pin (1) is followed successively by sealing cap screw (11) and compresses screw (12), and sealing cap screw (11) is used to connect sealing cap.
4. intramedullary pin according to claim 3 is characterized in that: the elongated slot of described intramedullary pin (2) is divided into symmetric two with the termination of intramedullary pin far-end.
5. intramedullary pin according to claim 4 is characterized in that: the diameter of small sircle hole (42) upper end in the pulling force hole (4) of described intramedullary pin is less than the diameter of lower end.
6. intramedullary pin according to claim 5 is characterized in that: the afterbody of the near-end of described intramedullary pin also is provided with groove (5).
7. intramedullary pin according to claim 6 is characterized in that: the screw thread lag screw (6) of described lag screw be axially arranged with through hole (65), the rear end of through hole (65) is an internal thread hole.
8. intramedullary pin according to claim 7 is characterized in that: the pressurization of described lag screw is anti-revolve screw (7) cylinder (72) axially be provided with screwed hole (72-1) and hexagon ring (72-2) from the inside to the outside successively.
9. according to the described intramedullary pin of one of claim 1 to 8, it is characterized in that: also comprise housing screw (8); Described housing screw (8) is assemblied in compressing in the screw (12) of intramedullary pin bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101535867A CN102232863A (en) | 2010-04-23 | 2010-04-23 | Intramedullary nail device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101535867A CN102232863A (en) | 2010-04-23 | 2010-04-23 | Intramedullary nail device |
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| Publication Number | Publication Date |
|---|---|
| CN102232863A true CN102232863A (en) | 2011-11-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101535867A Pending CN102232863A (en) | 2010-04-23 | 2010-04-23 | Intramedullary nail device |
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| CN (1) | CN102232863A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104688312A (en) * | 2015-03-17 | 2015-06-10 | 苏州瑞华医院有限公司 | Locking plate type intramedullary nail for femoral intertrochanteric fracture treatment |
| CN108210040A (en) * | 2016-12-14 | 2018-06-29 | 常州奥斯迈医疗器械有限公司 | A kind of proximal femoral nail |
| CN112472265A (en) * | 2020-10-30 | 2021-03-12 | 常州奥斯迈医疗器械有限公司 | Intramedullary implant system |
| CN113768599A (en) * | 2021-02-02 | 2021-12-10 | 浙江德康医疗器械有限公司 | Bone cement intramedullary nail fixing system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050149024A1 (en) * | 2003-09-08 | 2005-07-07 | Joseph Ferrante | Orthopaedic implant and screw assembly |
| US20090326534A1 (en) * | 2008-06-30 | 2009-12-31 | Depuy Products, Inc. | Fracture Fixation Apparatus |
| CN201701287U (en) * | 2010-04-23 | 2011-01-12 | 常州奥斯迈医疗器械有限公司 | Intramedullary nail device |
-
2010
- 2010-04-23 CN CN2010101535867A patent/CN102232863A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050149024A1 (en) * | 2003-09-08 | 2005-07-07 | Joseph Ferrante | Orthopaedic implant and screw assembly |
| US20090326534A1 (en) * | 2008-06-30 | 2009-12-31 | Depuy Products, Inc. | Fracture Fixation Apparatus |
| CN201701287U (en) * | 2010-04-23 | 2011-01-12 | 常州奥斯迈医疗器械有限公司 | Intramedullary nail device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104688312A (en) * | 2015-03-17 | 2015-06-10 | 苏州瑞华医院有限公司 | Locking plate type intramedullary nail for femoral intertrochanteric fracture treatment |
| CN108210040A (en) * | 2016-12-14 | 2018-06-29 | 常州奥斯迈医疗器械有限公司 | A kind of proximal femoral nail |
| CN112472265A (en) * | 2020-10-30 | 2021-03-12 | 常州奥斯迈医疗器械有限公司 | Intramedullary implant system |
| CN113768599A (en) * | 2021-02-02 | 2021-12-10 | 浙江德康医疗器械有限公司 | Bone cement intramedullary nail fixing system |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20111109 |