CN209713113U - Orthopaedics pedicle screw - Google Patents
Orthopaedics pedicle screw Download PDFInfo
- Publication number
- CN209713113U CN209713113U CN201822151660.6U CN201822151660U CN209713113U CN 209713113 U CN209713113 U CN 209713113U CN 201822151660 U CN201822151660 U CN 201822151660U CN 209713113 U CN209713113 U CN 209713113U
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- helicitic texture
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- male screw
- screw thread
- bone
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Abstract
The utility model provides a kind of orthopaedics pedicle screw, including male screw thread, surface is provided with the first helicitic texture, male screw thread pierces bone by the first helicitic texture in rotary manner, the end face of the first end of male screw thread offers mounting hole, the wall surface of the hole of mounting hole offers thread groove, and thread groove penetrates through male screw thread；Inner bolt, it is removably disposed in mounting hole, the surface of inner bolt has the second helicitic texture compatible with thread groove, second helicitic texture is arranged after passing through thread groove, inner bolt is fit into mounting hole in rotary manner and is connect with bone by the second helicitic texture, and the rotation direction of the second helicitic texture is oppositely oriented with the first helicitic texture.The utility model solves bone nail in the prior art and is chronically under complex stress environment, it is easy to happen loosening, even screwed out out of bone, to not only bad for bone rapidly, steadily growth heal, and the problem of will cause the secondary injury in affected part, having severely impacted the quality of life of patient.
Description
Technical field
The utility model relates to the field of medical instrument technology, are implanted into spiral shell in particular to a kind of orthopaedics from anti-back-out
The structure of nail designs.
Background technique
Bone nail is usually used in fixed orthopaedics implant as a kind of, commonly used in internal fracture or the fixation of dislocation, makes
Bone nail is directly screwed into the fixation that the implants such as two different bone blocks or fixed bone plate realize bone, affected part is promoted to be cured by the used time
It closes.
But clinically, the screw for being implanted into bones is chronically in the environment of complex stress, it is easy to pine occur
It is dynamic, or even gradually fine motion screws out out of bone, thus not only bad for bone rapidly, steadily growth heal, and very
It is likely to result in the secondary injury in affected part, has severely impacted the quality of life of patient.
Utility model content
The main purpose of the utility model is to provide a kind of orthopaedics pedicle screws, in the prior art for planting to solve
The bone nail for entering bone is chronically in the environment of complex stress, it is easy to it loosens, or even gradually fine motion screws out out of bone,
To not only bad for bone rapidly, steadily growth heal, and be likely to cause the secondary injury in affected part, seriously
Ground affects the problem of quality of life of patient.
To achieve the goals above, the utility model provides a kind of orthopaedics pedicle screw, for being implanted into bone, comprising:
Male screw thread, the surface of male screw thread are provided with the first helicitic texture, and male screw thread is pierced in rotary manner by the first helicitic texture
Bone, the end face of the first end of male screw thread offer the axially extending mounting hole along male screw thread, and the wall surface of the hole of mounting hole opens up
There is thread groove, thread groove is along the axially extending of mounting hole, and at least part thread groove is in the radial perforation male screw thread of mounting hole；
Inner bolt, inner bolt are removably disposed in mounting hole, and the surface of inner bolt has the second screw thread compatible with thread groove
Structure, and the second helicitic texture protrudes from the surface of male screw thread after thread groove, inner bolt is by the second helicitic texture to revolve
The mode turned is fit into mounting hole and connect with bone, wherein the rotation of the rotation direction of the second helicitic texture and the first helicitic texture
To on the contrary, to prevent male screw thread from exiting bone.
Further, the thread helix angle B of the second helicitic texture is greater than the thread helix angle A of the first helicitic texture.
Further, the ratio of thread helix angle B and thread helix angle A is more than or equal to 2 and is less than or equal to 3.
Further, thread helix angle A is between 10 ° to 30 °.
Further, radical length of second helicitic texture in the part on the surface for protruding from male screw thread is more than or equal to 2mm.
Further, the second helicitic texture around inner bolt periphery coiling rise circle number be more than or equal to 1 and be less than etc.
In 3.
Further, male screw thread includes sequentially connected nail tip, nail body and the head of a nail, wherein and mounting hole is provided on the head of a nail,
It includes slotted line and thread segment that body, which is followed closely, by the direction of the head of a nail to nail tip, wherein thread groove is located on the head of a nail and slotted line, and is located at
Thread groove on slotted line penetrates through male screw thread in the radial of mounting hole；First helicitic texture is located on thread segment.
Further, the outer diameter of slotted line is greater than the outer diameter of thread segment, and the diameter of slotted line is greater than or equal to the first spiral shell
The outer diameter of line structure.
Further, the axis of the axial length of the first helicitic texture, the axial length of thread groove and the second helicitic texture
To being equal in length.
Further, the hole section of the endface of the first end of the close male screw thread of mounting hole is in polygon, to form rotation
Twist operation hole section；The top end face of inner bolt offers handle hole, and the hole section of handle hole is in polygon.
Using the technical solution of the utility model, by the way that male screw thread is arranged, male screw thread is by the first helicitic texture to rotate
Mode pierce bone, to realize the normal use of orthopaedics pedicle screw, by being packed into inner bolt in the mounting hole of male screw thread,
Inner bolt is by being connected thereto and piercing bone by the second helicitic texture that the thread groove of male screw thread is pierced by, due to the second screw thread knot
The rotation direction of structure is oppositely oriented with the first helicitic texture, in this way, will receive interior when male screw thread has the tendency that bone is exited in rotation
The limit of screw and the second helicitic texture stops, to effectively prevent the further movement of male screw thread, it is ensured that male screw thread
The stability being implanted into bone, not only contribute to bone rapidly, steadily growth healing, and avoid affected part by two
Secondary injury reliably improves the quality of life of patient.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide a further understanding of the present invention, this is practical
Novel illustrative embodiments and their description are not constituteed improper limits to the present invention for explaining the utility model.
In the accompanying drawings:
Fig. 1 shows a kind of schematic front view of the orthopaedics pedicle screw of alternative embodiment according to the present utility model；
Fig. 2 shows the main view schematic cross-sectional views of the orthopaedics pedicle screw in Fig. 1；
Fig. 3 shows the schematic top plan view of the orthopaedics pedicle screw in Fig. 1；
Fig. 4 shows the schematic front view of the male screw thread of the orthopaedics pedicle screw in Fig. 1；
Fig. 5 shows the main view schematic cross-sectional view of the male screw thread in Fig. 4；
Fig. 6 shows the schematic top plan view of the male screw thread in Fig. 4；
Fig. 7 shows the schematic front view of the inner bolt of the orthopaedics pedicle screw in Fig. 1；
Fig. 8 shows the schematic cross-sectional view at the O-O of the inner bolt in Fig. 7；
Fig. 9 shows the schematic top plan view of the inner bolt in Fig. 7.
Wherein, the above drawings include the following reference numerals:
10, male screw thread；100, the first helicitic texture；11, mounting hole；111, torquing operations hole section；12, thread groove；13, it follows closely
Point；14, body is followed closely；141, slotted line；142, thread segment；15, the head of a nail；20, inner bolt；200, the second helicitic texture；21, it operates
Hole.
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
It clearly and completely describes, it is clear that described embodiment is only the utility model a part of the embodiment, rather than whole realities
Apply example.Be to the description only actually of at least one exemplary embodiment below it is illustrative, never as practical new to this
Type and its application or any restrictions used.Based on the embodiments of the present invention, those of ordinary skill in the art are not having
Every other embodiment obtained under the premise of creative work is made, is fallen within the protection scope of the utility model.
It is chronically in the environment of complex stress to solve the bone nail in the prior art for being implanted into bone, it is easy to
Loosen, in addition out of bone gradually fine motion screw out, thus not only bad for bone rapidly, steadily growth heal,
And it is likely to the problem of causing the secondary injury in affected part, having severely impacted the quality of life of patient, the utility model mentions
A kind of orthopaedics pedicle screw is supplied.
As shown in Figures 1 to 9, orthopaedics pedicle screw includes male screw thread 10 and inner bolt 20, male screw thread for being implanted into bone
10 surface is provided with the first helicitic texture 100, and male screw thread 10 pierces bone by the first helicitic texture 100 in rotary manner
Bone, the end face of the first end of male screw thread 10 offer the axially extending mounting hole 11 along male screw thread 10, the hole wall of mounting hole 11
Face offers thread groove 12, and thread groove 12 is axially extending along mounting hole 11, and at least part thread groove 12 is in mounting hole 11
Radial perforation male screw thread 10；Inner bolt 20 is removably disposed in mounting hole 11, and the surface of inner bolt 20 has and screw thread
Compatible second helicitic texture 200 of slot 12, and the second helicitic texture 200 protrudes from the table of male screw thread 10 after thread groove 12
Face, inner bolt 20 are fit into mounting hole 11 in rotary manner and are connect with bone by the second helicitic texture 200, wherein
The rotation direction of second helicitic texture 200 is oppositely oriented with the first helicitic texture 100, to prevent male screw thread 10 from exiting bone.
By the way that male screw thread 10 is arranged, male screw thread 10 pierces bone by the first helicitic texture 100 in rotary manner, with reality
The normal use of existing orthopaedics pedicle screw, by being packed into inner bolt 20 in the mounting hole 11 of male screw thread 10, inner bolt 20 passes through
It is connected thereto and bone is pierced by the second helicitic texture 200 that the thread groove of male screw thread 10 12 is pierced by, due to the second helicitic texture
200 rotation direction is oppositely oriented with the first helicitic texture 100, in this way, when male screw thread 10 has the tendency that bone is exited in rotation, meeting
Limit by inner bolt 20 and the second helicitic texture 200 stops, so that the further movement of male screw thread 10 is effectively prevented,
Ensure the stability that male screw thread 10 is implanted into bone, not only contribute to bone rapidly, steadily growth healing, and keep away
Exempt from affected part by secondary injury, reliably improves the quality of life of patient.
As shown in figs. 4 and 7, the thread helix angle B of the second helicitic texture 200 is greater than the spiral shell of the first helicitic texture 100
Tooth helix angle A.This, which is allowed for, keeps the thread helix angle A of the first helicitic texture 100 smaller, male screw thread 10 need rotate compared with
Multi-turn could pierce bone completely, it is ensured that male screw thread 10 is stably connected with bone stock, and the thread spiral of the second helicitic texture 200
Lift angle B needs are arranged larger, only need to screw the less circle number of inner bolt 20 in this way, inner bolt 20 is just able to enter mounting hole
11, while being connect with bone, the position-limiting action to male screw thread 10 is played, and inner bolt 20 assembles convenient, promotion with male screw thread 10
The property easy to use of orthopaedics pedicle screw.
Specifically, optionally, the ratio of thread helix angle B and thread helix angle A is more than or equal to 2 and is less than or equal to
3.The second helicitic texture 200 and the first screw thread of ratio with thread helix angle B and thread helix angle A within this range
Structure 100 is structurally reasonable, is integrally formed and fabricates with inner bolt 20 convenient for the second helicitic texture 200, is equally convenient for the first spiral shell
The integrated molding of line structure 100 and male screw thread 10 fabricates, and promotes the reasonable structure of orthopaedics pedicle screw.
Optionally, thread helix angle A is between 10 ° to 30 °.Correspondingly, thread helix angle B 20 ° to 90 ° it
Between.
Optionally, radical length of second helicitic texture 200 in the part on the surface for protruding from male screw thread 10 is more than or equal to
2mm.Second helicitic texture 200 of this parameter can either effectively be connect with bone, and playing prevents the rotation of male screw thread 10 from exiting
The effect of bone, while being also avoided that the damage to bone is excessive.
Optionally, the circle number of the second helicitic texture 200 risen around the coiling of the periphery of inner bolt 20 is more than or equal to 1 and is less than
Equal to 3.In this way, screwing inner bolt 20, circle number just can easily realize the assembly of inner bolt 20 Yu male screw thread 10 accordingly, right
Male screw thread 10 is reliably limited.
As shown in Figure 1, Figure 2, shown in Fig. 4 and Fig. 5, male screw thread 10 includes sequentially connected nail tip 13, follows closely body 14 and the head of a nail 15,
In, mounting hole 11 is provided on the head of a nail 15, and following closely body 14 by the direction of the head of a nail 15 to nail tip 13 includes slotted line 141 and thread segment
142, wherein thread groove 12 is located on the head of a nail 15 and slotted line 141, and the thread groove 12 being located on slotted line 141 is in mounting hole
11 radial perforation male screw thread 10；First helicitic texture 100 is located on thread segment 142.In this way, when inner bolt 20 is screwable into
While mounting hole 11, the second helicitic texture 200 is along 12 feed motion of thread groove, and a part of the second helicitic texture 200
Thread groove 12 is protruded to connect with bone.
As shown in Figure 1, Figure 2, shown in Fig. 4 and Fig. 5, the outer diameter of slotted line 141 is greater than the outer diameter of thread segment 142, and slotted line 141
Diameter be greater than or equal to the first helicitic texture 100 outer diameter.The male screw thread 10 of this structure type is more conducive to pierce bone, and
The surface of a wound generated to bone is smaller, and practicability is very high.
Optionally, the axial length of the first helicitic texture 100, the axial length of thread groove 12 and the second helicitic texture
200 axial length is equal.In this way, entering mounting hole 11 and the completion assembly of male screw thread 10 when inner bolt 20 is fully rotating, make
Obtaining orthopaedics pedicle screw has more compact structure.
As shown in Fig. 3, Fig. 6 and Fig. 8, the hole section of the endface of the first end of the close male screw thread 10 of mounting hole 11 is in more
Side shape, to form torquing operations hole section 111；The top end face of inner bolt 20 offers handle hole 21, and the hole section of handle hole 21 is in
Polygon.This is for the ease of carrying out torquing operations to male screw thread 10 and inner bolt 20, and the use of raising orthopaedics pedicle screw is just
Victory.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
Unless specifically stated otherwise, positioned opposite, the digital table of the component and step that otherwise illustrate in these embodiments
Up to the unlimited the scope of the utility model processed of formula and numerical value.Simultaneously, it should be appreciated that for ease of description, each shown in attached drawing
The size of a part is not to draw according to actual proportionate relationship.For skill known to person of ordinary skill in the relevant
Art, method and apparatus may be not discussed in detail, but in the appropriate case, and the technology, method and apparatus should be considered as awarding
Weigh part of specification.In shown here and discussion all examples, any occurrence should be construed as merely example
Property, not as limitation.Therefore, the other examples of exemplary embodiment can have different values.It should also be noted that similar
Label and letter similar terms are indicated in following attached drawing, therefore, once be defined in a certain Xiang Yi attached drawing, then with
In attached drawing afterwards do not need that it is further discussed.
For ease of description, spatially relative term can be used herein, as " ... on ", " ... top ",
" ... upper surface ", " above " etc., for describing such as a device shown in the figure or feature and other devices or spy
The spatial relation of sign.It should be understood that spatially relative term is intended to comprising the orientation in addition to device described in figure
Except different direction in use or operation.For example, being described as if the device in attached drawing is squeezed " in other devices
It will be positioned as " under other devices or construction after part or construction top " or the device of " on other devices or construction "
Side " or " under other devices or construction ".Thus, exemplary term " ... top " may include " ... top " and
" in ... lower section " two kinds of orientation.The device can also be positioned with other different modes and (is rotated by 90 ° or in other orientation), and
And respective explanations are made to the opposite description in space used herein above.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, work, device, component and/or their combination.
It should be noted that the description and claims of this application and term " first " in above-mentioned attached drawing, "
Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way
Data be interchangeable under appropriate circumstances, so that presently filed embodiment described herein can be in addition to illustrating herein
Or the sequence other than those of description is implemented.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (10)
1. a kind of orthopaedics pedicle screw, for being implanted into bone characterized by comprising
The surface of male screw thread (10), the male screw thread (10) is provided with the first helicitic texture (100), and the male screw thread (10) passes through
First helicitic texture (100) pierces the bone in rotary manner, and the end face of the first end of the male screw thread (10) is opened
Equipped with the axially extending mounting hole (11) along the male screw thread (10), the wall surface of the hole of the mounting hole (11) offers thread groove
(12), the thread groove (12) is along the axially extending of the mounting hole (11), and at least part thread groove (12) is in institute
The radial direction for stating mounting hole (11) penetrates through the male screw thread (10)；
Inner bolt (20), the inner bolt (20) are removably disposed in the mounting hole (11), the inner bolt (20)
Surface has with the thread groove (12) compatible second helicitic texture (200), and second helicitic texture (200) passes through
The surface of the male screw thread (10) is protruded from after the thread groove (12), the inner bolt (20) passes through second helicitic texture
(200) it is fit into the mounting hole (11) in rotary manner and is connect with the bone, wherein second helicitic texture
(200) rotation direction is oppositely oriented with first helicitic texture (100), to prevent the male screw thread (10) from exiting the bone
Bone.
2. orthopaedics pedicle screw according to claim 1, which is characterized in that the thread of second helicitic texture (200)
Helix angle B is greater than the thread helix angle A of first helicitic texture (100).
3. orthopaedics pedicle screw according to claim 2, which is characterized in that the thread helix angle B and the thread
The ratio of helix angle A is more than or equal to 2 and is less than or equal to 3.
4. orthopaedics pedicle screw according to claim 2 or 3, which is characterized in that the thread helix angle A at 10 ° extremely
Between 30 °.
5. orthopaedics pedicle screw according to claim 1, which is characterized in that second helicitic texture (200) is being protruded
Radical length in the part on the surface of the male screw thread (10) is more than or equal to 2mm.
6. orthopaedics pedicle screw according to claim 1, which is characterized in that second helicitic texture (200) around institute
The circle number for stating the periphery coiling rising of inner bolt (20) is more than or equal to 1 and is less than or equal to 3.
7. orthopaedics pedicle screw according to claim 1, which is characterized in that the male screw thread (10) includes sequentially connected
Nail tip (13), nail body (14) and the head of a nail (15), wherein the mounting hole (11) is provided on the head of a nail (15), the nail body
It (14) include slotted line (141) and thread segment (142) by the direction of the head of a nail (15) to the nail tip (13), wherein described
Thread groove (12) is located on the head of a nail (15) and the slotted line (141), and the spiral shell being located on the slotted line (141)
Groove (12) penetrates through the male screw thread (10) in the radial direction of the mounting hole (11)；First helicitic texture (100) is located at institute
It states on thread segment (142).
8. orthopaedics pedicle screw according to claim 7, which is characterized in that the outer diameter of the slotted line (141) is greater than institute
The outer diameter of thread segment (142) is stated, and the diameter of the slotted line (141) is greater than or equal to first helicitic texture (100)
Outer diameter.
9. orthopaedics pedicle screw according to claim 7, which is characterized in that the axial direction of first helicitic texture (100)
The axial length of length, the axial length of the thread groove (12) and second helicitic texture (200) is equal.
10. orthopaedics pedicle screw according to claim 1, which is characterized in that the mounting hole (11) close to described outer
The hole section of the endface of the first end of screw (10) is in polygon, to form torquing operations hole section (111)；The inner bolt
(20) top end face offers handle hole (21), and the hole section of the handle hole (21) is in polygon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822151660.6U CN209713113U (en) | 2018-12-18 | 2018-12-18 | Orthopaedics pedicle screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822151660.6U CN209713113U (en) | 2018-12-18 | 2018-12-18 | Orthopaedics pedicle screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209713113U true CN209713113U (en) | 2019-12-03 |
Family
ID=68677434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822151660.6U Active CN209713113U (en) | 2018-12-18 | 2018-12-18 | Orthopaedics pedicle screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209713113U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109464183A (en) * | 2018-12-18 | 2019-03-15 | 天衍医疗器材有限公司 | Orthopaedics pedicle screw |
-
2018
- 2018-12-18 CN CN201822151660.6U patent/CN209713113U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109464183A (en) * | 2018-12-18 | 2019-03-15 | 天衍医疗器材有限公司 | Orthopaedics pedicle screw |
| CN109464183B (en) * | 2018-12-18 | 2024-04-30 | 天衍医疗器材有限公司 | Orthopedic implant screw |
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