CN209332235U - A kind of femur marrow internal fixation nail - Google Patents
A kind of femur marrow internal fixation nail Download PDFInfo
- Publication number
- CN209332235U CN209332235U CN201821643442.8U CN201821643442U CN209332235U CN 209332235 U CN209332235 U CN 209332235U CN 201821643442 U CN201821643442 U CN 201821643442U CN 209332235 U CN209332235 U CN 209332235U
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- China
- Prior art keywords
- nail
- hole
- pulling force
- internal fixation
- screw rod
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- Expired - Fee Related
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- 241001227561 Valgus Species 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 108010048734 sclerotin Proteins 0.000 description 3
- 210000004872 soft tissue Anatomy 0.000 description 3
- 210000002435 tendon Anatomy 0.000 description 3
- 210000000988 bone and bone Anatomy 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
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- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 208000006735 Periostitis Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 210000003414 extremity Anatomy 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 239000003102 growth factor Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004118 muscle contraction Effects 0.000 description 1
- 230000002188 osteogenic effect Effects 0.000 description 1
- 210000003460 periosteum Anatomy 0.000 description 1
- 230000002980 postoperative effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
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- Surgical Instruments (AREA)
Abstract
The utility model provides a kind of femur marrow internal fixation nail, including main nail, main nail is equipped with central through hole, main screw top portion is equipped with fastening screw, fastening screw is equipped with tail cap, main nail includes proximally and distally, proximal end is equipped with overlapping hole, pin assembly is equipped in overlapping hole, pin assembly includes pulling force mother nail and pressurized nail, pulling force mother nail is hollow structure, it is dentation coarse-pitch thread that pulling force mother, which follows closely one end equipped with section, pulling force mother, which nails on, is equipped with the first slot section with coarse-pitch thread opposite side, thread segment and the second slot section, pressurized nail includes screw rod and nut, screw rod is matched with thread segment, closing piece is equipped with close to nut one end on screw rod, closing piece includes the slot perpendicular to screw rod, it is equipped in slot and is successively arranged cushion block, spring, lock tooth and limited block, it locks tooth and is equipped with an inclined-plane, inclined-plane is backwards to nut, distal end is equipped with interlocking hole, remote lock is equipped in self-locking nail Nail has the advantages that simple structure, easy to use, the anti-rotation of anti-back and stability are good.
Description
Technical field
The utility model belongs to the field of medical instrument technology, and in particular to a kind of femur marrow internal fixation nail.
Background technique
Has quite long history using intramedullary nail treatment limbs fracture.Had using the operative treatment that intramedullary nail is fractured
Following advantage: can control the axial line of force of fracture site, intramedullary nail with lock can prevent fracture rotation deformity, reduce
The risk of inner matter fracture；Using closure and minimal invasive techniques, reduce surgical infection rate；Reduce to periosteum blood fortune destruction,
Retain the growth factor for having osteogenic action in hemotoncus, there is expansion marrow clast autologous bone graft effect, contraction of muscle to generate fine motion and mention
Promote union for factors such as mechanical stimulations；Intramedullary nail center fixes, flexible fastening, stress dispersion avoid stress shielding work
With refracture incidence is low；Fixation can be with early functional exercise and weight bearing；Interior fixed take out passes through small notch, minimally invasive.?
In actual production and use process, anti-rotation anti-back is an emphasis in need of consideration in intramedullary nail design, in addition intramedullary nail master
The form of nail is also the another aspect for needing to consider emphatically.
A kind of anti-rotation anti-back anatomical form femoral interlocking nail system (publication number CN204133589U) of patent discloses a kind of anti-
Anti-back anatomical form femoral interlocking nail system is revolved, main nail squeezes into femoral bone cavitas medullaris, and wing nail squeezes into the overlapping hole upper hole of main nail proximal end,
Then main nail on being screwed into nail and setting threaded lower part overlapping hole, remote lock is then squeezed into main nail distal end by sighting device
Nail, finally tightens tail cap.Main nail, wing nail in the utility model are applied in combination with nail, increase and consolidate to femoral head neck
It is fixed, the anti-rotation of anti-back；Pressurization can be realized simultaneously；The design of distal screw interlocking angulation, increases the anti-rotation of system, but is using
In the process in face of complicated use environment and using crowd, need to further increase the anti-rotation of anti-back.
Therefore it needs solid in a kind of simple structure, easy to use, the anti-rotation of fitting femur, anti-back and the good femur marrow of stability
Fixed nail.
Utility model content
The purpose of the utility model is to provide a kind of femur marrow internal fixation nails, further promote moving back for existing femoral interlocking nail
Anti- rotation property and ease of use.
The utility model provides the following technical solution:
A kind of femur marrow internal fixation nail, including main nail, the main nail are equipped with central through hole, and the main screw top portion is equipped with fastening
Screw, the fastening screw are equipped with tail cap, and the main nail includes that proximally and distally, the proximal end is equipped with overlapping hole, the friendship
Pin assembly is equipped in folded hole, the pin assembly includes pulling force mother nail and pressurized nail, and the pulling force mother nail is hollow structure, institute
Stating pulling force mother and following closely one end equipped with section is dentation coarse-pitch thread, and the pulling force mother, which nails on, is equipped with first with the coarse-pitch thread opposite side
Slot section, thread segment and the second slot section, the pressurized nail includes screw rod and nut, and the screw rod is matched with the thread segment, institute
It states and is equipped with closing piece close to described nut one end on screw rod, the closing piece includes the slot perpendicular to the screw rod, in the slot
Equipped with being successively arranged cushion block, spring, lock tooth and limited block, the lock tooth equipped with an inclined-plane, the inclined-plane backwards to the nut,
The distal end is equipped with interlocking hole, is equipped with distal locking nail in the interlocking hole.
Preferably, the coarse-pitch thread depth is followed closely along the pulling force mother and is gradually reduced on direction from outside to inside.
Preferably, the pulling force mother nail and pressurized screw top portion are respectively equipped with Hexagon hole or interior plum blossom hole.
Preferably, the overlapping hole and the main nail are angled 130~140 °.
Preferably, the distal end is axially parallel with shaft of femur, and the cross-sectional area of the distal end is less than the transversal of the proximal end
Area.
Preferably, the proximal cross-section is trapezoidal, and proximal end trapezoidal cross-section can effectively enhance like articular prosthesis handle
Stability and mechanical strength；Trapezoidal design effectively remains the soft tissues such as normal sclerotin and tendon.
Preferably, the distal end is angled 4 ° with the proximal end, 4 ° of valgus angle designs: closer to femur shape, thick
The grand minimally invasive approach in vertex, effectively reduces wound size.
Preferably, interlocking hole internal diameter is greater than the distal locking nail outer diameter.
Preferably, the distal tip is equipped with fluting, and the fluting both ends are in jag shape, effectively prevents stress concentration.
The beneficial effects of the utility model are:
A kind of femur marrow internal fixation nail overall structure of the utility model is simple, is easy to manufacture；Pin assembly includes pulling force
The use of mother's nail and pressurized nail, effective anti-rotation provide more preferably stability, and prevent cutting out.Pulling force mother nail is fixed to
Behind position, significant pressure effect is generated when being screwed into pressurized nail, increases the fixation to femoral head neck, the anti-rotation of anti-back, while can
Realize pressurization；Distal end is angled 4 ° with the proximal end, 4 ° of valgus angle designs: minimally invasive on tuberosity vertex closer to femur shape
Approach effectively reduces wound size；Fastening screw and tail cap, can lock if necessary prevents the main postoperative excessive sliding of nail；It is main
Proximal end trapezoidal cross-section is followed closely like articular prosthesis handle, can effectively enhance stability and mechanical strength, trapezoidal design is effective
Remain the soft tissues such as normal sclerotin and tendon；Interlocking hole internal diameter is greater than distal locking nail outer diameter, and distal locking nail is increased
Fixed form improves stability；Distal tip is equipped with fluting, and the fluting both ends are in jag shape, effectively prevents stress concentration,
Equipped with closing piece, locks tooth and be equipped with an inclined-plane, inclined-plane is backwards to nut, so that pressurized nail can readily be screwed into but be difficult to twist
Out, pulling force mother can be followed closely to locked pressurization, the anti-rotation of anti-back.
Detailed description of the invention
Attached drawing is used to provide a further understanding of the present invention, and constitutes part of specification, practical with this
Novel embodiment is used to explain the utility model together, does not constitute limitations of the present invention.In the accompanying drawings:
Fig. 1 is the utility model structure diagram；
Fig. 2 is pin assembly structural schematic diagram；
Fig. 3 is part A structural schematic diagram in Fig. 2.
In the figure, it is marked as 1. main nails, 11. through-holes, 12. fastening screws, 13. tail caps, 2. proximal ends, 21. overlapping hole, 22. groups
Dowel, 3. pulling force mothers nail, 31. coarse-pitch thread, 32. first slot sections, 33. thread segments, 34. second slot sections, 4. pressurized nail, 41. spiral shells
Bar, 42. nuts, 5. closing pieces, 51. slots, 52. cushion blocks, 53. springs, 54. lock teeth, 55. limited blocks, 56. inclined-planes, 6. distal ends,
61. interlocking hole, 62. distal locking nails, 63. flutings.
Specific embodiment
As shown in Figure 1-3, a kind of femur marrow internal fixation nail, including main nail 1, main nail 1 are equipped with central through hole 11, main 1 top of nail
Portion is equipped with fastening screw 12, and fastening screw 12 is equipped with tail cap 13, and main nail 1 includes proximal end 2 and distal end 6, and proximal end 2 is equipped with overlapping hole
21, pin assembly 22 is equipped in overlapping hole 21, pin assembly 22 includes pulling force mother nail 3 and pressurized nail 4, and pulling force mother nail 3 is hollow
Structure, it is dentation coarse-pitch thread 31 that pulling force mother, which follows closely 3 one end and is equipped with section, is equipped with the with 31 opposite side of coarse-pitch thread on pulling force mother nail 3
One slot section 32, thread segment 33 and the second slot section 34, pressurized nail 4 include screw rod 41 and nut 42, screw rod 41 with thread segment 33
Match, is equipped with closing piece 5 close to 42 one end of nut on screw rod 41, closing piece 5 includes the slot 51 perpendicular to screw rod 41, is equipped in slot 51
Be successively arranged cushion block 52, spring 53, lock tooth 54 and limited block 55, lock tooth 54 is equipped with an inclined-plane 56, inclined-plane 56 backwards to nut 42,
Distally 6 it is equipped with interlocking hole 61, is equipped with distal locking nail 62 in interlocking hole 61.
As shown in Figure 1-3,31 depth of coarse-pitch thread is gradually reduced along pulling force mother nail 3 from outside to inside direction, pulling force mother follows closely 3 Hes
4 top of pressurized nail is respectively equipped with Hexagon hole or interior plum blossom hole, and overlapping hole 21 and main nail 1 are angled 130~140 °, distal end
6 is axially parallel with shaft of femur, and the cross-sectional area of distal end 6 is less than the cross-sectional area of proximal end 2, and 2 section of proximal end is trapezoidal, 2 ladder of proximal end
Shape cross section can effectively enhance stability and mechanical strength like articular prosthesis handle；Trapezoidal design effectively remains just
The normal soft tissues such as sclerotin and tendon, distal end 6 are angled 4 ° with proximal end 2,4 ° of valgus angle designs, closer to femur shape, thick
The grand minimally invasive approach in vertex effectively reduces wound size, and 61 internal diameter of interlocking hole is greater than 62 outer diameter of distal locking nail, and 6 top of distal end is equipped with
Fluting 63,63 both ends of fluting are in jag shape, effectively prevent stress concentration.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, although ginseng
The utility model is described in detail according to previous embodiment, it for those skilled in the art, still can be with
It modifies the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features.It is all
Within the spirit and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in practical
Within novel protection scope.
Claims (9)
1. a kind of femur marrow internal fixation nail, which is characterized in that including main nail, the main nail is equipped with central through hole, the main screw top
Portion is equipped with fastening screw, and the fastening screw is equipped with tail cap, and the main nail includes that proximally and distally, the proximal end is equipped with overlapping
Hole, is equipped with pin assembly in the overlapping hole, and the pin assembly includes pulling force mother nail and pressurized nail, during the pulling force mother nail is
Hollow structure, it is dentation coarse-pitch thread that the pulling force mother, which follows closely one end equipped with section, and the pulling force mother nails on opposite with the coarse-pitch thread one
End is equipped with the first slot section, thread segment and the second slot section, and the pressurized nail includes screw rod and nut, the screw rod and the screw thread
Section matches, and is equipped with closing piece close to described nut one end on the screw rod, the closing piece includes the slot perpendicular to the screw rod, institute
It states to be equipped in slot and is successively arranged cushion block, spring, lock tooth and limited block, the lock tooth is equipped with an inclined-plane, and the inclined-plane is backwards
The nut, the distal end are equipped with interlocking hole, are equipped with distal locking nail in the interlocking hole.
2. a kind of femur marrow internal fixation nail according to claim 1, which is characterized in that the coarse-pitch thread depth is along the drawing
Power mother follows closely to be gradually reduced on direction from outside to inside.
3. a kind of femur marrow internal fixation nail according to claim 1, which is characterized in that the pulling force mother nail and the pressurization
Sub- screw top portion is respectively equipped with Hexagon hole or interior plum blossom hole.
4. a kind of femur marrow internal fixation nail according to claim 1, which is characterized in that the overlapping hole and it is described it is main nail at
Angle is 130~140 °.
5. a kind of femur marrow internal fixation nail according to claim 1, which is characterized in that the distal end is axially flat with shaft of femur
Row, the cross-sectional area of the distal end are less than the cross-sectional area of the proximal end.
6. a kind of femur marrow internal fixation nail according to claim 1, which is characterized in that the proximal cross-section is trapezoidal.
7. a kind of femur marrow internal fixation nail according to claim 1, which is characterized in that the distal end and the proximal end angulation
Degree is 4 °.
8. a kind of femur marrow internal fixation nail according to claim 1, which is characterized in that interlocking hole internal diameter is greater than described
Distal locking nail outer diameter.
9. a kind of femur marrow internal fixation nail according to claim 1, which is characterized in that the distal tip is equipped with fluting,
The fluting both ends are in jag shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821643442.8U CN209332235U (en) | 2018-10-10 | 2018-10-10 | A kind of femur marrow internal fixation nail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821643442.8U CN209332235U (en) | 2018-10-10 | 2018-10-10 | A kind of femur marrow internal fixation nail |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209332235U true CN209332235U (en) | 2019-09-03 |
Family
ID=67745559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821643442.8U Expired - Fee Related CN209332235U (en) | 2018-10-10 | 2018-10-10 | A kind of femur marrow internal fixation nail |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209332235U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109259842A (en) * | 2018-10-10 | 2019-01-25 | 苏州吉美瑞医疗器械股份有限公司 | A kind of femur marrow internal fixation nail |
-
2018
- 2018-10-10 CN CN201821643442.8U patent/CN209332235U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109259842A (en) * | 2018-10-10 | 2019-01-25 | 苏州吉美瑞医疗器械股份有限公司 | A kind of femur marrow internal fixation nail |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| 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: 20190903 |