CN203885598U - Gamma intramedullary nail - Google Patents
Gamma intramedullary nail Download PDFInfo
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- CN203885598U CN203885598U CN201420306164.2U CN201420306164U CN203885598U CN 203885598 U CN203885598 U CN 203885598U CN 201420306164 U CN201420306164 U CN 201420306164U CN 203885598 U CN203885598 U CN 203885598U
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- intramedullary pin
- gamma
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- connecting bolt
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Abstract
The utility model relates to a gamma intramedullary nail composed of an intramedullary nail body, a lag screw and a fixing screw. The intramedullary nail body is formed by a long-strip cylindrical nail rod and a tail cap arranged at the tail portion. A plurality of long-strip grooves evenly distributed in the axial direction are formed in the outer wall of the front end of the nail rod, a front transverse through hole matched with the fixing screw is formed in the front portion of the nail rod, and a rear transverse through hole matched with the lag screw is formed in the tail portion of the nail rod. The lag screw is composed of a spiral cutter head, a connection bolt, a screwing-prevention sleeve pipe and an anti-screwing nut. According to the gamma intramedullary nail, self-locking of the lag screw of the gamma intramedullary nail can be achieved, so that the loosening phenomenon is avoided during use, and potential safety hazards are avoided.
Description
Technical field
This utility model relates to plastic surgery's member, specially refers to a kind of gamma intramedullary pin.
Background technology
Intramedullary pin is combined by intramedullary pin main body, lag screw and hold-down screw conventionally.
Intramedullary pin can be for the fracture of location and the fixing long bone such as femur.In the femur of fracture, can intramedullary pin main body be inserted in the pulp cavity of femur and be placed to along the fracture line of femur and extend.Then, hold-down screw or other fixtures can be inserted on the opposite side of the femur that is passed in fracture and be formed on the hole in intramedullary pin main body, be fixed together with relative section of the femur of guaranteeing fracture.
If head and/or the neck of the head of long bone and/or for example femur of neck rupture, lag screw can be inserted in the transverse holes (transverse bore) being formed in intramedullary pin main body.This hole is arranged such that lag screw extends through the neck of long bone and to the head of long bone and through fracture line, this makes lag screw can reduce the head of long bone and/or the fracture of neck.
Intramedullary pin in use, realize axially and the locking of hoop, but lag screw can not be realized self-locking, has potential safety hazard by hold-down screw.
Utility model content
Technical problem to be solved in the utility model is: a kind of gamma intramedullary pin is provided, and its lag screw can be realized self-locking.
For addressing the above problem, the technical solution adopted in the utility model is: gamma intramedullary pin, combined by intramedullary pin main body, lag screw and hold-down screw, described intramedullary pin main body is made up of rectangular columned nail bar and the tail cap that is arranged on afterbody, the front end outer wall of nail bar is provided with equally distributed many rectangular grooves vertically, the front portion of nail bar is provided with the front horizontal through hole matching with hold-down screw, and the afterbody of nail bar is provided with the rear horizontal through hole matching with lag screw; Described lag screw is made up of spiral cutter head, connecting bolt, anti-rotation set pipe and anti-spin nut, the anterior outer wall of spiral cutter head is provided with spirillum, rear portion is cylindrical structure, and the afterbody of spiral cutter head is provided with draw-in groove, and on face, is provided with the first dentate stripe in its back-end; The front portion of connecting bolt is provided with the annulus plush copper matching with draw-in groove, and the rear portion outer setting of connecting bolt has external screw thread; Anti-rotation set pipe is tubular structure, and it is sleeved on the outside of rear portion, connecting bolt and the anti-spin nut of spiral cutter head; The inwall of anti-spin nut is provided with the female thread matching with the rear external thread of connecting bolt, is provided with the second dentate stripe matching with the first dentate stripe arranging on the rear end face of spiral cutter head on the front end face of anti-spin nut.
Between described nail bar and tail cap, be connected by screw thread.
In the rear end face of described connecting bolt, be provided with interior hexagonal groove.
The leading portion inwall of described anti-rotation set pipe is the cylindrical structural matching with the rear portion of spiral cutter head, and the back segment inwall of anti-rotation set pipe is flat hole, and the outer wall of described anti-spin nut is the shape matching with flat hole.
The outer wall both sides of described anti-spin nut are provided with Elastic buckle.
The outer wall of described anti-rotation set pipe is provided with two protuberances.
The afterbody of described hold-down screw is greater than the width of front horizontal through hole.
Described rear horizontal through hole is and the axial oblique slotted eye at an angle of following closely bar.
The beneficial effects of the utility model are: above-mentioned gamma intramedullary pin, its lag screw can be realized self-locking, thereby can prevent from occurring in use loosening phenomenon, has avoided potential safety hazard.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is using state figure of the present utility model;
Fig. 3 is the perspective view of lag screw in Fig. 1;
Fig. 4 is the assembly structure schematic diagram of the lag screw of Fig. 2;
Fig. 5 is the structural representation of spiral cutter head in Fig. 3;
Fig. 6 is the structural representation of anti-rotation set pipe in Fig. 3;
Fig. 7 is the left TV structure schematic diagram of anti-rotation set pipe in Fig. 6;
Fig. 8 is the structural representation of connecting bolt in Fig. 3;
Fig. 9 is another line of vision structural representation of connecting bolt in Fig. 3;
Figure 10 is the structural representation of anti-spin nut in Fig. 3;
Figure 11 is another line of vision structural representation of anti-spin nut in Fig. 3;
Figure 12 is the structural representation of tail cap in Fig. 1;
Figure 13 is the structural representation of hold-down screw in Fig. 1;
Figure 14 is the structural representation of following closely bar in Fig. 1;
Figure 15 is the structural representation of following closely another line of vision of bar in Fig. 1;
Figure 16 is the structural representation of following closely another line of vision of bar in Fig. 1;
Figure 17 is the plan view of hold-down screw part in Fig. 1;
In figure: 1, nail bar, 2, tail cap, 3, rectangular groove, 4, hold-down screw, 5, front horizontal through hole, 6, rear horizontal through hole, 7, spiral cutter head, 8, connecting bolt, 9, anti-rotation set pipe, 10, anti-spin nut, 11, draw-in groove, 12, the first dentate stripe, 13, annulus plush copper, 14, external screw thread, 15, interior hexagonal groove, 16, female thread, 17, the second dentate stripe, 18, Elastic buckle, 19, flat hole.
Detailed description of the invention
Below by specific embodiment, gamma intramedullary pin described in the utility model is described in further detail.
As Fig. 1, shown in Fig. 2, gamma intramedullary pin, by intramedullary pin main body, lag screw and hold-down screw 4 combine, the structure of hold-down screw 4 as shown in figure 13, described intramedullary pin main body is made up of with the tail cap 2 that is arranged on afterbody rectangular columned nail bar 1, the structure of tail cap 2 as shown in figure 12, between nail bar 1 and tail cap 2, be connected by screw thread, as Figure 14, Figure 15, shown in Figure 16, the front end outer wall of nail bar 1 is provided with equally distributed many rectangular grooves 3 vertically, the front portion of nail bar 1 is provided with the front horizontal through hole 5 matching with hold-down screw 4, the afterbody of nail bar 1 is provided with the rear horizontal through hole 6 matching with lag screw, as shown in Figure 3, Figure 4, described lag screw is made up of spiral cutter head 7, connecting bolt 8, anti-rotation set pipe 9 and anti-spin nut 10, as shown in Figure 5, the anterior outer wall of spiral cutter head 7 is provided with spirillum, rear portion is cylindrical structure, the afterbody of spiral cutter head 7 is provided with draw-in groove 11, and on face, is provided with the first dentate stripe 12 in its back-end, as shown in Figure 8, Figure 9, the front portion of connecting bolt 8 is provided with the annulus plush copper 13 matching with draw-in groove 11, and the rear portion outer setting of connecting bolt 8 has external screw thread 14, is provided with interior hexagonal groove 15 in the rear end face of connecting bolt 8, as shown in Figure 6, Figure 7, anti-rotation set pipe 9 is tubular structure, and it is sleeved on the outside of rear portion, connecting bolt 8 and the anti-spin nut 10 of spiral cutter head 7, as shown in Figure 10, Figure 11, the inwall of anti-spin nut 10 is provided with the female thread 16 matching with the rear external thread 14 of connecting bolt 8, is provided with the second dentate stripe 17 matching with the first dentate stripe 12 arranging on the rear end face of spiral cutter head 7 on the front end face of anti-spin nut 10.
As shown in Figure 6, Figure 7, the leading portion inwall of described anti-rotation set pipe 9 is the cylindrical structural matching with the rear portion of spiral cutter head 7, the back segment inwall of anti-rotation set pipe 9 is flat hole 19, as shown in Figure 10, Figure 11, the outer wall of described anti-spin nut 10 is the shape matching with flat hole 19, and the outer wall both sides of anti-spin nut 10 are provided with Elastic buckle 18.Realize the hoop locking between anti-spin nut 10 and anti-rotation set pipe 9 by flat hole 19.
As shown in Figure 6, Figure 7, the outer wall of described anti-rotation set pipe 9 is provided with two protuberances.By protuberance is set, the outer wall that makes anti-rotation set pipe 9 is non-cylinder, after implantation skeleton, is difficult for turn.
As shown in Figure 2, above-mentioned gamma intramedullary pin, in use, use special apparatus that intramedullary pin main body is implanted in skeleton, hold-down screw 4 is penetrated in front horizontal through hole 5, as shown in figure 17, the afterbody of hold-down screw 4 is greater than the width of front horizontal through hole 5, it is spacing that thereby the afterbody of hold-down screw 4 is realized, lag screw is penetrated in rear horizontal through hole 6, rear laterally through hole 6 is and the axial oblique slotted eye at an angle of following closely bar 1, lag screw is in insertion afterwards laterally when through hole 6, the afterbody of lag screw is greater than the width of rear horizontal through hole 6 equally, it is spacing that thereby the afterbody of lag screw is realized, thereby realize the locking of the axial and hoop of intramedullary pin main body, after installation, whole intramedullary pin is the shape of Greek alphabet gamma, so be called gamma intramedullary pin.In the time that lag screw is installed, first spiral cutter head 7 is passed to rear horizontal through hole 6, implant bones, the anterior annulus plush copper 13 of connecting bolt 8 is stuck in the draw-in groove 11 of spiral cutter head 7, then casing pipe sleeve is contained in to its outside, to resist spin nut 10 to be arranged in anti-rotation set pipe 9, by flat hole 19 and Elastic buckle 18, realize the hoop locking between anti-spin nut 10 and anti-rotation set pipe 9, adopt turret head instrument, turn connecting bolt 8, the female thread 16 of anti-spin nut 10 and the external screw thread 14 of connecting bolt 8 are meshed, now anti-spin nut 10 spiral that is progressively connected is close, and till the dentate stripe phase interlock on the dentate stripe in anti-spin nut 10 front end faces and spiral cutter head 7 rear end faces, mutual interlock by dentate stripe realizes locking.
The above embodiments are principle and effect thereof of illustrative the invention only, and the embodiment of part utilization, but not for limiting this utility model; It should be pointed out that for the person of ordinary skill of the art, not departing under the prerequisite of this utility model creation design, can also make some distortion and improvement, these all belong to protection domain of the present utility model.
Claims (8)
1. gamma intramedullary pin, combined by intramedullary pin main body, lag screw and hold-down screw, it is characterized in that: described intramedullary pin main body is made up of rectangular columned nail bar and the tail cap that is arranged on afterbody, the front end outer wall of nail bar is provided with equally distributed many rectangular grooves vertically, the front portion of nail bar is provided with the front horizontal through hole matching with hold-down screw, and the afterbody of nail bar is provided with the rear horizontal through hole matching with lag screw;
Described lag screw is made up of spiral cutter head, connecting bolt, anti-rotation set pipe and anti-spin nut, the anterior outer wall of spiral cutter head is provided with spirillum, rear portion is cylindrical structure, and the afterbody of spiral cutter head is provided with draw-in groove, and on face, is provided with the first dentate stripe in its back-end; The front portion of connecting bolt is provided with the annulus plush copper matching with draw-in groove, and the rear portion outer setting of connecting bolt has external screw thread; Anti-rotation set pipe is tubular structure, and it is sleeved on the outside of rear portion, connecting bolt and the anti-spin nut of spiral cutter head; The inwall of anti-spin nut is provided with the female thread matching with the rear external thread of connecting bolt, is provided with the second dentate stripe matching with the first dentate stripe arranging on the rear end face of spiral cutter head on the front end face of anti-spin nut.
2. gamma intramedullary pin according to claim 1, is characterized in that: between described nail bar and tail cap, be connected by screw thread.
3. gamma intramedullary pin according to claim 1, is characterized in that: in the rear end face of described connecting bolt, be provided with interior hexagonal groove.
4. gamma intramedullary pin according to claim 1, it is characterized in that: the leading portion inwall of described anti-rotation set pipe is the cylindrical structural matching with the rear portion of spiral cutter head, the back segment inwall of anti-rotation set pipe is flat hole, and the outer wall of described anti-spin nut is the shape matching with flat hole.
5. gamma intramedullary pin according to claim 4, is characterized in that: the outer wall both sides of described anti-spin nut are provided with Elastic buckle.
6. gamma intramedullary pin according to claim 1, is characterized in that: the outer wall of described anti-rotation set pipe is provided with two protuberances.
7. gamma intramedullary pin according to claim 1, is characterized in that: the afterbody of described hold-down screw is greater than the width of front horizontal through hole.
8. gamma intramedullary pin according to claim 1, is characterized in that: described rear horizontal through hole is and the axial oblique slotted eye at an angle of following closely bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420306164.2U CN203885598U (en) | 2014-06-10 | 2014-06-10 | Gamma intramedullary nail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420306164.2U CN203885598U (en) | 2014-06-10 | 2014-06-10 | Gamma intramedullary nail |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203885598U true CN203885598U (en) | 2014-10-22 |
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ID=51712054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420306164.2U Active CN203885598U (en) | 2014-06-10 | 2014-06-10 | Gamma intramedullary nail |
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| CN (1) | CN203885598U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104000647A (en) * | 2014-06-10 | 2014-08-27 | 江苏百易得医疗科技有限公司 | Gamma intramedullary nail |
| CN105395244A (en) * | 2015-11-23 | 2016-03-16 | 赵文 | Femoral intramedullary nail device |
| CN110478023A (en) * | 2019-09-10 | 2019-11-22 | 苏州爱得科技发展股份有限公司 | A kind of dynamic coxa locking bone fracture plate of adjustable-angle |
-
2014
- 2014-06-10 CN CN201420306164.2U patent/CN203885598U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104000647A (en) * | 2014-06-10 | 2014-08-27 | 江苏百易得医疗科技有限公司 | Gamma intramedullary nail |
| CN105395244A (en) * | 2015-11-23 | 2016-03-16 | 赵文 | Femoral intramedullary nail device |
| CN110478023A (en) * | 2019-09-10 | 2019-11-22 | 苏州爱得科技发展股份有限公司 | A kind of dynamic coxa locking bone fracture plate of adjustable-angle |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |