CN206198028U - A kind of near end of thighbone Medullary fixation device - Google Patents
A kind of near end of thighbone Medullary fixation device Download PDFInfo
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- CN206198028U CN206198028U CN201620739110.4U CN201620739110U CN206198028U CN 206198028 U CN206198028 U CN 206198028U CN 201620739110 U CN201620739110 U CN 201620739110U CN 206198028 U CN206198028 U CN 206198028U
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- pinning
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- fixation device
- cutter head
- medullary fixation
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Abstract
The utility model discloses a kind of near end of thighbone Medullary fixation device, including main nail, near-end pinning, os integumentale screw, compression pinning and tail cap in marrow, and main nail has near-end and with cuspidated distal end in marrow, and near-end extends to distal end, and angled setting；Near-end has the first through hole coordinated with near-end pinning, first through hole axis and the angled setting of near-end, and distal end has the second through hole coordinated with os integumentale screw；Master nails on end in marrow has screwed hole, and screwed hole is provided with tail cap and compresses pinning, compresses pinning lower end and compress near-end pinning from top to bottom, and tail cap is threadedly coupled with screwed hole, and compression pinning；Near-end pinning front end is cutter head, and proximal lock is nailed on the step surface coordinated with compression pinning lower end, has stress relief grooves in first through hole, effectively prevents the fracture of near-end pinning and first through hole junction.
Description
Technical field
The utility model is related to medical instruments field, more particularly to a kind of near end of thighbone Medullary fixation device.
Background technology
Chinese patent (CN2011200614876) discloses a kind of near end of thighbone nail rod pinning system, discloses the system
It is made up of main nail, the hollow self-taped type pinning of near-end, distal end self-taped type pinning and main nail tail cap, wherein main nail is in elongated tubular, main nail
Top it is thicker, for coordinating with the hollow self-taped type pinning of near-end, the bottom of main nail is thinner, for matching somebody with somebody with distal end self-taped type pinning
Close.When using, in the pulp cavity that main nail bottom is vertically inserted on femur after, the hollow self-taped type pinning of near-end is screwed in into main nail respectively
Top, distal end self-taped type pinning screws in main nail bottom, and screws in main nail tail cap in the upper end of main nail, so as to reach to fracturing
Femur implement fixed therapeutic effect.
Because the grasping force of the hollow self-taped type pinning of near-end is limited, particularly anti-rotation poor performance is prolonged using possible
The phenomenon that the hollow self-taped type pinning of near-end is exited can occur, surgical effect is influenceed.
In order to solve the above problems, occur substituting the hollow self tapping of near-end using the cutter head with screw blade in the prior art
Type pinning, makes the cutter head of the screw blade coordinate with main nail and screws in femoral trochanteric, prevents it from exiting or penetrating femur bulb.Example
Such as：
A kind of proximal femoral internal fixer that Chinese patent (CN2010203019929) is disclosed, it discloses in main body
One inclined hole is set on the main fixed part of PFN, and the inclined hole is elliptical aperture.And on the oblique hole
The cutter head with screw blade is equipped with, the knife bar of the screw blade afterbody on the cutter head is slidably plugged in the main fixed part of main body
In the inclined hole.Cutter head is squeezed into sclerotin than more loose femoral trochanteric, roomy circular knife on the screw blade of cutter head
Face obliquely rotates and extrudes loose sclerotin, is allowed to closely knit, and many spiral knife face structures of screw blade can significantly improve anti-rotation
Performance and grasping force.
Foregoing inclined hole is larger so that thinning between the hole and body outer wall, and breakage phenomenon easily occurs.Chinese patent
(CN2011200614876) there is also the problem.
Utility model content
Main purpose of the present utility model there are provided a kind of simple structure, the near end of thighbone for preventing near-end pinning from exiting
Medullary fixation device.
Another object of the present utility model is to provide a kind of near end of thighbone Medullary fixation device, should be coordinated with near-end pinning
First through hole there are stress relief grooves, effectively prevent fracture.
To achieve the above objectives, the utility model provides a kind of near end of thighbone Medullary fixation device, and it includes：It is main in marrow
Nail, near-end pinning, os integumentale screw, compression pinning and tail cap, main nail has near-end and with cuspidated distal end, institute in the marrow
State near-end and extend to the distal end, and angled setting；
The near-end has the first through hole coordinated with the near-end pinning, and the first through hole axis is in the near-end
50 °~65 ° settings, the distal end has the second through hole coordinated with the os integumentale screw；
Master nails on end in the marrow has screwed hole, and the tail cap and the compression pinning are arranged on the spiral shell from top to bottom
In pit, the compression pinning lower end compresses the near-end pinning, and the tail cap is threadedly coupled with the screwed hole, and compresses institute
State compression pinning；
The near-end pinning includes cutter head and knife bar, and the cutter head extends to the knife bar, and the knife bar is located at described the
In one through hole, and with the step surface coordinated with the compression pinning lower end；
There are stress relief grooves in the first through hole.
In one embodiment, the cutter head is the cutter head with screw blade, and the first through hole assumes diamond in shape, and in water chestnut
Four angles of first through hole described in shape are arc transition；
The quantity of the stress relief grooves is two, and is symmetrically arranged at the upper and lower both sides of the first through hole；
Each described stress relief grooves is in wavy.
In one embodiment, the cutter head is tapping screw, and the first through hole is rounded；
The quantity of the stress relief grooves is two, and is symmetrically arranged at the upper and lower both sides of the first through hole；
The stress relief grooves are curved.
In one embodiment, it is described when the near-end pinning is by the first through hole, and after screwing in femoral trochanteric
Near-end pinning end flushes with bone face.
In one embodiment, the step surface is in arc-shaped, and the compression pinning lower end has at least one arc surface.
In one embodiment, the compression pinning lower end has two arc surfaces, and is symmetrical arranged.
In one embodiment, the compression pinning lower end is plugged on the step surface, and the compression pinning lower end sets
It is equipped with a jack coordinated with the step surface.
In one embodiment, the cutter head front end closing, is evenly arranged with multiple cement holes on the outer wall of the cutter head.
In one embodiment, also including bone cement delivery pipe, the bone cement delivery pipe front end closing, the bone cement
At least one orifice is provided with conveying pipe outer wall；
The bone cement delivery pipe front end can be inserted into the cutter head from the near-end pinning rear end.
In one embodiment, the quantity of orifice is one, and adjacent with bone cement delivery pipe front end.
In one embodiment, second through hole is in pass long.
According to preferred embodiment, the utility model is offered the advantage that：
(1) the utility model is nailed on by proximal lock step surface and compress pinning cooperation, effectively prevent near-end pinning from moving back
Go out or prevent near-end pinning from penetrating femur bulb.
(2) multiple cement holes are provided with the outer wall of the cutter head of near-end pinning of the present utility model, by defeated with bone cement
Send pipe to use cooperatively, uniformly can fill inside femur.
(3) it is of the present utility model for being provided with stress relief grooves in the first through hole that coordinates with near-end pinning, resist
Axial load, bending force and torsion, prevent the fracture of its junction, extend use time.
The utility model is further illustrated below in conjunction with drawings and Examples.
Brief description of the drawings
Fig. 1 is the structural representation of near end of thighbone Medullary fixation device first embodiment described in the utility model；
Fig. 2 is the structural representation of near end of thighbone Medullary fixation device second embodiment described in the utility model；
Fig. 3 is the sectional view of Fig. 2；
Fig. 4 is the structural representation of main nail in marrow described in Fig. 1；
Fig. 5 is the structural representation of main nail in marrow described in Fig. 2；
Fig. 6 is near-end pinning described in the utility model and compresses the structural representation that pinning coordinates；
Fig. 7 is the topology view of compression pinning first embodiment described in the utility model；
Fig. 8 is the topology view of compression pinning second embodiment described in the utility model；
Fig. 9 is the topology view of compression pinning 3rd embodiment described in the utility model；
Figure 10 is the sectional view that compression pinning 3rd embodiment described in the utility model coordinates with near-end pinning；
Figure 11 is bone cement delivery pipe described in the utility model.
Specific embodiment
Hereinafter describe for disclosing the present invention so that those skilled in the art can realize the present invention.It is excellent in below describing
Embodiment is selected to be only used as citing, it may occur to persons skilled in the art that other obvious modifications.Define in the following description
General principle of the invention can apply to other embodiments, deformation program, improvement project, equivalent and without the back of the body
From the other technologies scheme of the spirit and scope of the present invention.
First embodiment
As shown in Fig. 1, Fig. 4, Fig. 3 and Fig. 6, the near end of thighbone Medullary fixation device, it includes：It is main nail 100 in marrow, near
End pinning 200, os integumentale screw 300, compression pinning 500 and tail cap 400, main nail 100 has near-end and with cuspidated in marrow
Distal end, near-end extends to distal end, and angled setting；
Near-end has a first through hole 101 coordinated with near-end pinning 200, the axis of first through hole 101 and near-end in 50 °~
65 ° of settings, distal end has the second through hole 102 coordinated with os integumentale screw 300；
100 upper ends of main nail have screwed hole 103 in marrow, and tail cap 400 and compression pinning 500 are arranged on screwed hole from top to bottom
In 103, compress the lower end of pinning 500 and compress near-end pinning 200, tail cap 400 is threadedly coupled with screwed hole 103, and compresses lock
Nail 500；
Near-end pinning 200 includes cutter head 201 and knife bar 202, and cutter head 201 extends to knife bar 202, and knife bar 202 is located at first
In through hole 101, and with the step surface 204 coordinated with compression pinning 500 lower end；
There are stress relief grooves 104 in first through hole 101.
Specifically, cutter head 201 is the cutter head with screw blade, and first through hole 101 assumes diamond in shape, and the first through hole that assumes diamond in shape
101 four angles are arc transition；The quantity of stress relief grooves 104 is two, and is symmetrically arranged in first through hole 101
Lower both sides；Each stress relief grooves 104 is in wavy.The section of knife bar 202 is identical with the section of first through hole 101.
By being provided with stress relief grooves, axial load, bending force and torsion are resisted, prevented near-end pinning and first from leading to
There is fracture in hole junction.
The structure of near-end pinning 200 can be the structure as combined pinning in Chinese patent (CN2009100318070), adopt
Assembled with multiple parts.It can also be the integral structure in Fig. 1.Near-end pinning 200 using integral structure has
Intensity higher, is easy to operate and processes.
When near-end pinning 200 is by first through hole 101, and after screwing in femoral trochanteric, the end of near-end pinning 200 and bone face
Flush.
As shown in Figure 6 and Figure 7, step surface 204 is in arc-shaped, compress pinning 500 lower end have an arc surface 501 and its
Coordinate.Realize that compress the lower end of pinning 500 matches somebody with somebody with the completion card of step surface 204, and more firm compression.
Coordinated with near-end pinning 200 by compressing pinning 500, effectively prevent near-end pinning 200 from being moved back from first through hole 101
Go out, and influence surgical effect.Specifically, the two ends limitation of step surface 204 compresses pinning 500 and is skidded off from step surface 204, prevents
Near-end pinning 200 exits or penetrates femur bulb.
As shown in figure 8, compressing the lower end of pinning 500 has two arc surfaces 501, and it is symmetrical arranged.Prevent when compression pinning
During 500 screw-in screwed hole 103, the arc surface 501 is set to match somebody with somebody with the card of step surface 204 because of directionality problem.By setting two
Arc surface 501 avoids the appearance of above mentioned problem.
As shown in Figure 9 and Figure 10, compress pinning 500 to be plugged on step surface 204, compress the lower end of pinning 500 and be provided with one
The individual jack 502 coordinated with step surface 204.
As shown in figure 1, being provided with multiple cement holes 203 on cutter head.By cement hole to injecting bone cement in femoral head, from
Strengthen the strength and stability of near end of thighbone, be easy to the recovery of near end of thighbone.
Specifically, cutter head front end closing, cement hole 203 is uniformly arranged on the outer wall of cutter head.Bone cement passes through multiple water
Mud hole 203 is uniformly extruded, and may be such that diseased region is pressurized uniform, so as to improve surgical effect.In the prior art, cement hole 203
The front end of cutter head is provided in, bone cement is injected forward, causes the uneven of both sides, can to a certain extent influence near end of thighbone
Recovery.Also result near end of thighbone local pressure higher, and cause the adverse consequences such as pain in patient's art.
As shown in figure 11, the closing of the front end of bone cement delivery pipe 600, is provided with a note on the outer wall of bone cement delivery pipe 600
Hole 601.Orifice 601 is adjacent with the front end of bone cement delivery pipe 600.
When using, the front end of bone cement delivery pipe 600 proximally penetrates the rear end of pinning 200, inside cutter head.Work as femoral head
When certain position of head needs filling bone cement, only need to be relative with the position respectively by orifice 601 and a cement hole 203.
Correspondingly, the closing of the front end of bone cement delivery pipe 600, multiple notes are evenly arranged with the outer wall of bone cement delivery pipe 600
Hole 601.
Second embodiment
As shown in Fig. 2, Fig. 3 and Fig. 5, the near end of thighbone Medullary fixation device, it includes：Main nail 100, proximal lock in marrow
Nail 200, os integumentale screw 300, compression pinning 500 and tail cap 400, main nail 100 has near-end and with cuspidated distal end in marrow,
Near-end extends to distal end, and angled setting；
Near-end has a first through hole 101 coordinated with near-end pinning 200, the axis of first through hole 101 and near-end in 50 °~
65 ° of settings, distal end has the second through hole 102 coordinated with os integumentale screw 300；
100 upper ends of main nail have screwed hole 103 in marrow, and tail cap 400 and compression pinning 500 are arranged on screwed hole from top to bottom
In 103, compress the lower end of pinning 500 and compress near-end pinning 200, tail cap 400 is threadedly coupled with screwed hole 103, and compresses lock
Nail 500；
Near-end pinning 200 includes cutter head 201 and knife bar 202, and cutter head 201 extends to knife bar 202, and knife bar 202 is located at first
In through hole 101, and with the step surface 204 coordinated with compression pinning 500 lower end；
There are stress relief grooves 104 in first through hole 101.
Specifically, cutter head 201 is tapping screw, and first through hole 101 is rounded；The quantity of stress relief grooves 104 is two,
And about 101 both sides to be symmetrically arranged at first through hole；Stress relief grooves 104 are curved.
Further, step surface 204 is in arc-shaped, and there is an arc surface 501 to coordinate with it to compress the lower end of pinning 500.
Preferably, compressing the lower end of pinning 500 has two arc surfaces 501, and it is symmetrical arranged.
Further, compress pinning 500 to be plugged on step surface 204, compress the lower end of pinning 500 and be provided with one and step
The jack 502 that face 204 coordinates.
Further, multiple cement holes 203 are provided with cutter head.
Specifically, cutter head front end closing, cement hole 203 is uniformly arranged on the outer wall of cutter head.Bone cement passes through multiple water
Uniformly extrude in mud hole 203.
The front end of bone cement delivery pipe 600 is closed, and an orifice 601 is provided with the outer wall of bone cement delivery pipe 600.Orifice
601 is adjacent with the front end of bone cement delivery pipe 600.
As shown in figure 5, the second through hole 102 is in pass long.
Embodiment described above is merely to illustrate technological thought of the present utility model and feature, its object is to make ability
Technical staff in domain will appreciate that content of the present utility model and implement according to this, it is impossible to only limit this practicality with the present embodiment
New the scope of the claims is used, i.e., equal change or modification that all spirit according to disclosed in the utility model is made, is still fallen at this
In the scope of the claims of utility model.
Claims (10)
1. a kind of near end of thighbone Medullary fixation device, it is characterised in that：Including main nail (100), near-end pinning (200), skin in marrow
Matter bone screws (300), compression pinning (500) and tail cap (400), main nail (100) is with near-end and with cuspidated in the marrow
Distal end, the near-end extends to the distal end, and angled setting；
The near-end has the first through hole (101) coordinated with the near-end pinning (200), first through hole (101) axis
With the near-end in 50 °~65 ° settings, the distal end has the second through hole coordinated with the os integumentale screw (300)
(102)；
Main nail (100) upper end has a screwed hole (103) in the marrow, and the tail cap (400) and compression pinning (500) are from upper
It is arranged under in the screwed hole (103), described compression pinning (500) lower end compresses the near-end pinning (200), the tail
Cap (400) is threadedly coupled with the screwed hole (103), and compresses compression pinning (500)；
The near-end pinning (200) includes cutter head (201) and knife bar (202), and the cutter head (201) extends to the knife bar
(202), the knife bar (202) is in the first through hole (101), and with coordinating with described compression pinning (500) lower end
Step surface (204)；
There are stress relief grooves (104) on the first through hole (101).
2. near end of thighbone Medullary fixation device as claimed in claim 1, it is characterised in that：The cutter head (201) is with spiral shell
The cutter head of rotary knife piece, the first through hole (101) assumes diamond in shape, and four angles of the first through hole (101) that assumes diamond in shape are circular arc
Transition；
The quantity of the stress relief grooves (104) is two, and is symmetrically arranged at the first through hole (101) upper and lower two
Side；
Each described stress relief grooves (104) is in wavy.
3. near end of thighbone Medullary fixation device as claimed in claim 2, it is characterised in that：The cutter head (201) is self tapping spiral shell
Nail, the first through hole (101) is rounded；
The quantity of the stress relief grooves (104) is two, and is symmetrically arranged at the first through hole (101) upper and lower two
Side；
The stress relief grooves (104) are curved.
4. near end of thighbone Medullary fixation device as claimed in claim 1, it is characterised in that：The step surface (204) is in circular arc
Shape, compression pinning (500) lower end has at least one arc surface (501).
5. near end of thighbone Medullary fixation device as claimed in claim 4, it is characterised in that：Described compression pinning (500) lower end
With two arc surfaces (501), and it is symmetrical arranged.
6. near end of thighbone Medullary fixation device as claimed in claim 1, it is characterised in that：Described compression pinning (500) lower end
It is plugged on the step surface (204), described compression pinning (500) lower end is provided with one and coordinates with the step surface (204)
Jack (502).
7. near end of thighbone Medullary fixation device as claimed in claim 1, it is characterised in that：Cutter head (201) the front end closing,
Multiple cement holes (203) are evenly arranged with the outer wall of the cutter head (201).
8. near end of thighbone Medullary fixation device as claimed in claim 7, it is characterised in that：Also include bone cement delivery pipe
(600), bone cement delivery pipe (600) the front end closing, at least one is provided with bone cement delivery pipe (600) outer wall
Orifice (601)；
Bone cement delivery pipe (600) front end can be inserted into the cutter head (201) from near-end pinning (200) rear end
It is interior.
9. near end of thighbone Medullary fixation device as claimed in claim 8, it is characterised in that：The quantity of orifice (601) is one,
And it is adjacent with bone cement delivery pipe (600) front end.
10. near end of thighbone Medullary fixation device as claimed in claim 1, it is characterised in that：Second through hole (102) is in length
Pass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620739110.4U CN206198028U (en) | 2016-07-14 | 2016-07-14 | A kind of near end of thighbone Medullary fixation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620739110.4U CN206198028U (en) | 2016-07-14 | 2016-07-14 | A kind of near end of thighbone Medullary fixation device |
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| CN206198028U true CN206198028U (en) | 2017-05-31 |
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ID=58755174
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620739110.4U Active CN206198028U (en) | 2016-07-14 | 2016-07-14 | A kind of near end of thighbone Medullary fixation device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3485831A4 (en) * | 2017-08-03 | 2019-11-27 | Double Medical Technology Inc. | Femur fixing apparatus |
-
2016
- 2016-07-14 CN CN201620739110.4U patent/CN206198028U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3485831A4 (en) * | 2017-08-03 | 2019-11-27 | Double Medical Technology Inc. | Femur fixing apparatus |
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