CN208404803U - A kind of interlocking anti-settling proximal femoral nail - Google Patents
A kind of interlocking anti-settling proximal femoral nail Download PDFInfo
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- CN208404803U CN208404803U CN201721095733.3U CN201721095733U CN208404803U CN 208404803 U CN208404803 U CN 208404803U CN 201721095733 U CN201721095733 U CN 201721095733U CN 208404803 U CN208404803 U CN 208404803U
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Abstract
The utility model discloses a kind of interlocking anti-settling proximal femoral nail, including main nail, the top of the main nail is equipped with two helical tooth blades being arranged obliquely, and the top of two helical tooth blades is provided with screw blade, and the lower end of two helical tooth blades is connected with each other by attachment base and is locked.The utility model has the beneficial effects that can prevent fracture site from rotating, greater trochanter bone block is caused to squeeze, and be suitable for sufferers of osteoporosis face, effectively improves holding power.
Description
Technical field
The utility model relates to intramedullary nail technical fields, it particularly relates in a kind of interlocking anti-settling near end of thighbone marrow
Nail.
Background technique
Intertrochanteric fracture of the femur is the fracture that old group people occurs most frequently, due to the generally existing physical basis shape of the elderly
The case where state is poor, and internal disease is more, osteoporosis, unbearable major trauma operative treatment, therefore some medical institutions devise
Some minimally-invasive treatment internal fixation devices for this fracture, such as the PFNA system and Simith of AO Fundationd
The Intertan system of Nephew company, due to designing, the diameter of the nail nail tail of such system all in 16MM or more,
For there are the intertrochanteric fractures of independent fracture line there are greater trochanter portion, it is easy to squeeze greater trochanter bone block in implantation, causes
Reduction of the fracture contact surface is few, even if collodiaphyseal angle early stage resets well, union is still difficult, eventually leads to inner matter fracture and loses
It loses, while isolated greater trochanter bone block is more and more remoter from normal position with myotasis.Such fracture is as using conventional intramedullary needle
The proximal end (10 ~ 14mm of proximal diameter) rebuilds nail system, but because of osteoporosis and " Z " word effect leads to operative failure.
For the problems in the relevant technologies, currently no effective solution has been proposed.
Utility model content
For above-mentioned technical problem in the related technology, the utility model proposes in a kind of interlocking anti-settling near end of thighbone marrow
Nail, can prevent fracture site from rotating, greater trochanter bone block is caused to squeeze, and be suitable for sufferers of osteoporosis face, effectively improve holding power.
To realize the above-mentioned technical purpose, the technical solution of the utility model is achieved in that
A kind of interlocking anti-settling proximal femoral nail, including main nail, the top of the main nail is equipped with to be arranged obliquely
Two helical tooth blades, the top of two helical tooth blades is provided with screw blade, and the lower end of two helical tooth blades passes through
Attachment base is connected with each other locking.
Further, the upper end of the main nail is fixedly connected with tail cap, and the top of the main nail offers and the spiral
The corresponding inclined hole of cutter, the main nail lower part offer slotted hole and relief groove.
Further, the upper end of the main nail is provided with stepped the first threaded hole and the second threaded hole, the tail
The upper end of cap is provided with six square toes, hexagonal hole is offered at the center of six square toes, the lower end of the tail cap is provided with and institute
State the cylinder that the thread Pilot hole of the second threaded hole matches, the tail cap be provided between six square toes and cylinder with it is described
The thread segment that first corresponding threaded holes close.
Further, it is 55 ° that the helical tooth blade top and the master, which nail on the angle between portion,.
Further, the helical tooth blade includes cutter body, and the screw blade is arranged in the top of the cutter body,
The lower outside of the cutter body is arranged with casing, and the lower end of the cutter body is connected with the upper end of jackscrew, the jackscrew
It is threaded with nut, the lower part of the lower part of the cutter body and the nut is each provided with a cascaded surface, described sleeve pipe
It is arranged between two cascaded surfaces.
Further, it is offered on the lower end surface of the cutter body with blind hole jaggy, the top of the blind hole
Clamping groove is offered on side wall, the upper end of the jackscrew is provided with the protrusion matched with the clamping groove, and the jackscrew is in institute
The lower section for stating protrusion is provided with screw thread, and interior six square grooves are offered on the lower end surface of the jackscrew.
Further, the first sawtooth is provided on the lower end surface of the cutter body, on the upper end end face of the nut
It is provided with the second sawtooth matched with first sawtooth, the interior spiral shell matched with the screw thread is provided on the nut
Line.
Further, described sleeve pipe is provided with boss, the top edge of the nut on one end inner wall of the nut
Axial direction is provided with the plane matched with boss, and the upper end of the plane is provided with spring card, and the boss is located at institute
It states between spring card and the cascaded surface of the nut.
Further, the attachment base is fixedly connected with two jackscrews respectively by connected nail, and interior the six of the jackscrew
The third threaded hole matched with the connected nail is offered in square groove, be provided on the attachment base respectively with two connections
The circular hole matched is followed closely, is provided with threaded hole between two circular holes.
Further, the upper end of the main nail offers U-lag.
The utility model has the beneficial effects that can prevent fracture site from rotating, greater trochanter bone block is caused to squeeze, and is suitable for bone
The loose patient of matter, effectively improves holding power.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only the utility model
Some embodiments for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other attached drawings.
Fig. 1 is the structural schematic diagram that anti-settling proximal femoral nail is interlocked according to the utility model embodiment；
Fig. 2 is the structural schematic diagram of the helical tooth blade according to the utility model embodiment；
Fig. 3 is the structural schematic diagram of the cutter body according to the utility model embodiment；
Fig. 4 is the structural schematic diagram of the casing according to the utility model embodiment；
Fig. 5 is the structural schematic diagram of the nut according to the utility model embodiment；
Fig. 6 is the structural schematic diagram of the jackscrew according to the utility model embodiment；
Fig. 7 is the structural schematic diagram of the attachment base according to the utility model embodiment；
Fig. 8 is the structural schematic diagram of the connected nail according to the utility model embodiment；
Fig. 9 is the structural schematic diagram of the main nail according to the utility model embodiment；
Figure 10 is the A of the main nail according to the utility model embodiment to cross-sectional view；
Figure 11 is the structural schematic diagram of the tail cap according to the utility model embodiment.
In figure:
1, helical tooth blade；2, main nail；3, tail cap；4, attachment base；5, connected nail；6, cutter body；7, jackscrew；8, casing；
9, nut；10, inclined hole；11, the first threaded hole；12, the first sawtooth；13, the second sawtooth；14, clamping groove；15, raised；16, spiral shell
Line；17, internal screw thread；18, plane；19, spring card；20, boss；21, threaded hole；22, circular hole；23, groove；24, interior six side
Slot；25, slotted hole；26, relief groove；27, the second threaded hole；28, U-lag；29, screw blade；30, six square toes；31, six side
Hole；32, cylinder；33, thread segment.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art's every other embodiment obtained, all belongs to
In the range of the utility model protection.
As shown in figs. 1-11, a kind of interlocking anti-settling proximal femoral nail according to the utility model embodiment,
Including main nail 2, the top of the main nail 2 is equipped with two helical tooth blades 1 being arranged obliquely, the top of two helical tooth blades 1
It is provided with screw blade 29, the lower end of two helical tooth blades 1 passes through attachment base 4 and is connected with each other locking.
In a specific embodiment of the utility model, the upper end of the main nail 2 is fixedly connected with tail cap 3, the master
The top of nail 2 offers inclined hole 10 corresponding with the helical tooth blade 1, and 2 lower parts of the main nail offer slotted hole 25 and subtract
Indent 26.
In a specific embodiment of the utility model, the upper end of the main nail 2 is provided with the first stepped spiral shell
Pit 11 and the second threaded hole 27, the upper end of the tail cap 3 are provided with six square toes 30, offer at the center of six square toes 30
Hexagonal hole 31, the lower end of the tail cap 3 is provided with the cylinder 32 matched with the thread Pilot hole of second threaded hole 27, described
Tail cap 3 is provided with the thread segment 33 matched with first threaded hole 11 between six square toes 30 and cylinder 32.
In a specific embodiment of the utility model, between 2 tops of 1 top of helical tooth blade and the main nail
Angle is 55 °.
In a specific embodiment of the utility model, the helical tooth blade 1 includes cutter body 6, the cutter master
The screw blade 29 is arranged in the top of body 6, and the lower outside of the cutter body 6 is arranged with casing 8, the cutter body 6
Lower end be connected with the upper end of jackscrew 7, the jackscrew 7 is threaded with nut 9, the lower part of the cutter body 6 and described
The lower part of nut 9 is each provided with a cascaded surface, and described sleeve pipe 8 is arranged between two cascaded surfaces.
In a specific embodiment of the utility model, offered on the lower end surface of the cutter body 6 with scarce
Mouthful blind hole, offer clamping groove 14 in the upper portion side wall of the blind hole, the upper end of the jackscrew 7 is provided with and the clamping groove
14 protrusions 15 matched, the jackscrew 7 are provided with screw thread 16, the lower end surface of the jackscrew 7 in raised 15 lower section
On offer in six square grooves 24.
In a specific embodiment of the utility model, the first saw is provided on the lower end surface of the cutter body 6
Tooth 12 is provided with the second sawtooth 13 matched with first sawtooth 12, the nut 9 on the upper end end face of the nut 9
On be provided with the internal screw thread 17 matched with the screw thread 16.
In a specific embodiment of the utility model, described sleeve pipe 8 is arranged on one end inner wall of the nut 9
Have a boss 20, the top of the nut 9 is in axial direction provided with the plane 18 matched with boss 20, the plane 18 it is upper
End is provided with spring card 19, and the boss 20 is between the spring card 19 and the cascaded surface of the nut 9.
In a specific embodiment of the utility model, the attachment base 4 by connected nail 5 respectively with two jackscrews
7 are fixedly connected, and offer the third threaded hole matched with the connected nail 5, the company in interior six square groove 24 of the jackscrew 7
It is provided with the circular hole 22 matched respectively with two connected nails 5 on joint chair 4, is provided with threaded hole between two circular holes 22
21。
In a specific embodiment of the utility model, the upper end of the main nail 2 offers U-lag 28.
In order to facilitate the above-mentioned technical proposal for understanding the utility model, below by way of practical new to this in specifically used mode
The above-mentioned technical proposal of type is described in detail.
The mode described in the utility model that is fixedly connected such as can be connected with, be clamped at the conventional technical means replacement.
Mutual anti-settling proximal femoral nail described in the utility model is a kind of follow-on PFNA, including helical tooth blade
1, main nail 2, tail cap 3, attachment base 4 and connected nail 5；The helical tooth blade 1 includes cutter body 6, jackscrew 7, casing 8 and nut
9；The two pieces of one end of helical tooth blade 1 far from screw blade 29 are arranged in the attachment base 4, by connected nail 5 by two pieces of spirals
Cutter 1 is parallel on attachment base 4, inclined hole 10 at 2 upper end of the main nail setting two, and inclined hole 10 and main nail 2 are in parallel at 55 ° of angles
Two pieces of helical tooth blades 1 together can be inserted into two inclined holes 10；Thread segment 33 is set in the tail cap 3, with 2 upper ends of main nail
First threaded hole 11 in portion is in mating connection；8 inner hollow of casing, is arranged in the outside of cutter body 6, the knife
Having main body 6 and first sawtooth 12 is set far from the end face of screw blade 29, the second sawtooth 13 is arranged in the upper surface of the nut 9,
First sawtooth 12 and the second sawtooth 13 can be meshed；Notch, the top is arranged in one end of 6 the first sawtooth of band 12 of cutter body
Silk 7 is arranged to stepped cylindrical, and the protrusion 15 of 7 upper end of jackscrew can be entered in the clamping groove 14 of cutter body 16 by the notch,
Screw thread 16 is set on the outside of the jackscrew 7, and internal screw thread 17, nut 9 and jackscrew 7 are arranged on inner wall for 9 inner hollow of nut
It is threadedly coupled；It is symmetrically arranged with plane 18 on the nut 9, spring card 19 is provided in plane, the casing 8 is in circle
Column, inner hollow are symmetrically arranged with boss 20 on one end inner wall of nut 9, and boss 20 is matched with plane 18, works as spiral shell
Spring when mother 9 screws in casing 8, when the second sawtooth 13 on nut 9 is engaged with the first sawtooth 12 of cutter body 6, on nut 9
Card 19 can snap on the boss 20 of casing 8, prevent falling off for nut.The attachment base 4 is at batter post shape, among attachment base 4
Threaded hole 21 is set, convenient for carrying out capturing operation when operation, circular hole 22 is arranged in 21 two sides of threaded hole, for installing connected nail 5, circle
The axis in hole 22 and the gradient of attachment base 4 are consistent, and chamfering is arranged in 22 one end of circular hole, and groove 23, circular knife is arranged in the other end
When tool 1 is connect with connector 4, nut 9 can be placed in the groove 23.The jackscrew is six in the setting of one end of attachment base 4
Square groove 24, captures convenient for instrument, and third threaded hole is arranged in interior six square groove 24 of the jackscrew 7, is used for and 5 screw thread of connected nail
Connection.
2 lower part of the main nail setting is cambered, which meets the radian of human femur under loading, and the setting of 2 lower parts of main nail is oval
Chamfering is arranged in the both ends in hole 25, slotted hole 25, and the screw for screwing in human femur under loading passes through the slotted hole 25, adds to provide sound state
Relief groove 26 is arranged in pressure, 2 lower parts of main nail, makes main nail 2 when implanted femur is intracavitary, stress can be dispersed, prevent Periprosthetic fracture；
The second threaded hole 27 is arranged in the upper end of main nail 2, after fracture site healing, can screw in the second spiral shell with a threaded stick in outside
Pit 27, the threaded connection of stick and main nail 2 can drive main nail 2 to exit femur by applying pulling force to stick；The upper end of main nail 2 is set
U-type groove 28 is set, convenient for being distinguished with U-type groove connection instrument to left and right part when operation.
Screw blade 29 is set on the cutter body 6, and screw blade 29 has roomy contact area, improves close
The stability of sclerite is held, for sufferers of osteoporosis face, screw blade 29 is pressed onto screw blade 29 weeks when squeezing into, by cancellous bone
It encloses, improves the anchor resultant force of helical tooth blade 1, the cancellous bone that biomechanics experiment has proven to compress can make the stability of helical tooth blade 1
It improves, can prevent from rotating well and collapse.
Two pieces of helical tooth blades 1 are used in parallel by attachment base 4, and two pieces of helical tooth blades 1, which are used in combination to can be achieved to combine, to be continued
Pressurization, prevents femoral head from rotating, further increases anti-cut power output.
3 inner hollow of tail cap, tail cap nail on end head and six square toes 30 are arranged, and hexagonal hole is arranged inside six square toes 30
31, cylinder 32 is arranged in the lower end of tail cap 3, and cylinder 32 and the thread Pilot hole of the second threaded hole 27 on main nail 2 match.
Mutual anti-settling proximal femoral nail described in the utility model is suitable for base of nebk ot femur and through femur and tibia
Folding, intertrochanteric fracture, subtrochanteric fracture, inverse tuberosity fracture and nonunion or poor healing, the treatment such as multiple injury.
To sum up, it by means of the above-mentioned technical proposal of the utility model, can prevent fracture site from rotating, lead to greater trochanter bone block
It squeezes, and is suitable for sufferers of osteoporosis face, effectively improve holding power.
The above is only the preferred embodiments of the present utility model only, is not intended to limit the utility model, all practical at this
Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the utility model
Within the scope of shield.
Claims (10)
1. a kind of interlocking anti-settling proximal femoral nail, including main nail (2), which is characterized in that wear on the top of the main nail (2)
Equipped with two helical tooth blades (1) being arranged obliquely, the top of two helical tooth blades (1) is provided with screw blade (29), and two
The lower end of the helical tooth blade (1) passes through attachment base (4) and is connected with each other locking.
2. interlocking anti-settling proximal femoral nail according to claim 1, which is characterized in that it is described it is main nail (2) it is upper
End is fixedly connected with tail cap (3), and the top of the main nail (2) offers inclined hole (10) corresponding with the helical tooth blade (1),
Described main nail (2) lower part offers slotted hole (25) and relief groove (26).
3. interlocking anti-settling proximal femoral nail according to claim 2, which is characterized in that it is described it is main nail (2) it is upper
End is provided with stepped the first threaded hole (11) and the second threaded hole (27), and the upper end of the tail cap (3) is provided with six sides
Head (30) offers hexagonal hole (31) at the center of six square toes (30), and the lower end of the tail cap (3) is provided with and described the
The cylinder (32) that the thread Pilot hole of two threaded holes (27) matches, the tail cap (3) is in six square toes (30) and cylinder (32)
Between be provided with the thread segment (33) matched with first threaded hole (11).
4. interlocking anti-settling proximal femoral nail according to claim 1, which is characterized in that the helical tooth blade (1)
Angle between top and described main nail (2) top is 55 °.
5. interlocking anti-settling proximal femoral nail according to claim 1, which is characterized in that the helical tooth blade (1)
Including cutter body (6), the top of the cutter body (6) is arranged the screw blade (29), under the cutter body (6)
Portion's outer sheath is equipped with casing (8), and the lower end of the cutter body (6) is connected with the upper end of jackscrew (7), jackscrew (7) screw thread
It is connected with nut (9), the lower part of the cutter body (6) and the lower part of the nut (9) are each provided with a cascaded surface, described
Casing (8) is arranged between two cascaded surfaces.
6. interlocking anti-settling proximal femoral nail according to claim 5, which is characterized in that the cutter body (6)
Lower end surface on offer with blind hole jaggy, offer clamping groove (14), the top in the upper portion side wall of the blind hole
The upper end of silk (7) is provided with the protrusion (15) matched with the clamping groove (14), and the jackscrew (7) is in raised (15)
Lower section is provided with screw thread (16), and interior six square grooves (24) are offered on the lower end surface of the jackscrew (7).
7. interlocking anti-settling proximal femoral nail according to claim 6, which is characterized in that the cutter body (6)
Lower end surface on be provided with the first sawtooth (12), be provided on the upper end end face of the nut (9) and first sawtooth
(12) the second sawtooth (13) matched is provided with the internal screw thread (17) matched with the screw thread (16) on the nut (9).
8. interlocking anti-settling proximal femoral nail according to claim 7, which is characterized in that described sleeve pipe (8) is close
It is provided with boss (20) on one end inner wall of the nut (9), the top of the nut (9) is in axial direction provided with and boss
(20) upper end of the plane (18) matched, the plane (18) is provided with spring card (19), and the boss (20) is located at institute
It states between spring card (19) and the cascaded surface of the nut (9).
9. interlocking anti-settling proximal femoral nail according to claim 8, which is characterized in that the attachment base (4) is logical
It crosses connected nail (5) to be fixedly connected with two jackscrews (7) respectively, be offered in interior six square groove (24) of the jackscrew (7) and institute
The third threaded hole that connected nail (5) matches is stated, is provided on the attachment base (4) and matches respectively with two connected nails (5)
The circular hole (22) of conjunction is provided with threaded hole (21) between two circular holes (22).
10. interlocking anti-settling proximal femoral nail according to claim 1, which is characterized in that it is described it is main nail (2) it is upper
End offers U-lag (28).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721095733.3U CN208404803U (en) | 2017-08-30 | 2017-08-30 | A kind of interlocking anti-settling proximal femoral nail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721095733.3U CN208404803U (en) | 2017-08-30 | 2017-08-30 | A kind of interlocking anti-settling proximal femoral nail |
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| Publication Number | Publication Date |
|---|---|
| CN208404803U true CN208404803U (en) | 2019-01-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721095733.3U Active CN208404803U (en) | 2017-08-30 | 2017-08-30 | A kind of interlocking anti-settling proximal femoral nail |
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| CN (1) | CN208404803U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107440778A (en) * | 2017-08-30 | 2017-12-08 | 北京市富乐科技开发有限公司 | One kind interlocking anti-settling PFN |
-
2017
- 2017-08-30 CN CN201721095733.3U patent/CN208404803U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107440778A (en) * | 2017-08-30 | 2017-12-08 | 北京市富乐科技开发有限公司 | One kind interlocking anti-settling PFN |
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