CN208710037U - Bone screws - Google Patents
Bone screws Download PDFInfo
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- CN208710037U CN208710037U CN201820011163.3U CN201820011163U CN208710037U CN 208710037 U CN208710037 U CN 208710037U CN 201820011163 U CN201820011163 U CN 201820011163U CN 208710037 U CN208710037 U CN 208710037U
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- thread segment
- bone
- bone screws
- head
- protrusion
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Abstract
The utility model provides a kind of bone screws, comprising: head, for transmitting torque；Bar portion, it is connected with head, bar portion includes the first thread segment and the second thread segment, and the second thread segment is arranged between the first thread segment and head, the lead angle of first thread segment is equal with the lead angle of the second thread segment, the screw pitch of the screw pitch of the first thread segment less than the second thread segment.The technical solution of the utility model effectively solves screws in the prior art to be easy the problem of loosening abjection after surgery.
Description
Technical field
The utility model relates to medical instruments fields, in particular to a kind of bone screws.
Background technique
Bone is a kind of high density connective tissue with unique texture, and cortex bone, cancellous bone are broadly divided into structure.Skin
Matter bone is also compact bone, maintains sclerotin hard, fine and close.Mainly there is compact arranged osteon to constitute, be distributed in long bone backbone and
The surface of other types bone.The bone density of cancellous bone is lower than cortex bone, and high resilience；The scaffolding structure of cancellous bone facilitates
Skeletal form is maintained, renitency constitutes axial bone such as skull, rib cage, the spinal bone of the overwhelming majority.Cancellous bone be primarily present with
Centrum, long bone both ends, rib cage etc..
Screw is a kind of common orthopedic fixation device tool, and wherein cancellous bone screw is different from os integumentale screw, screw thread
Spacing (screw thread ditch) is wide and deep, and the large percentage of threading path and stud diameter, is mainly used for the fixation of four limbs metaphysis and backbone,
Clinically because screw fixing intensity not enough causes the loosening of postoperative screw, abjection to occur often, both at home and abroad many studies have shown that spiral shell
The fixing intensity of nail is inside and outside closely related in factor with its, such as the oneself factor of screw, bone density, surgical operation technology
And qualification etc..
Utility model content
The utility model is intended to provide a kind of bone screws, is easy to loosen abjection after surgery to solve screw in the prior art
Problem.
To achieve the goals above, the utility model provides a kind of bone screws, comprising: head, for transmitting torque；Bar
Portion is connected with head, and bar portion includes the first thread segment and the second thread segment, and the second thread segment is arranged on the first thread segment and head
Between, the lead angle of the first thread segment is equal with the lead angle of the second thread segment, and the screw pitch of the first thread segment is less than second
The screw pitch of thread segment.
Further, backing stop structure is provided between head and bar portion, when bone screws and the fixed plate for being used for fix bone
When cooperation, backing stop structure is for preventing bone screws from exiting.
Further, backing stop structure includes the neck for connecting head and bar portion and the protrusion that exterior is arranged in,
Radially protruding of the protrusion along neck.
Further, protrusion is annular or protrusion includes circumferentially multiple, and the side of protrusion towards bar portion is set
It is equipped with guiding surface.
Further, meet between the diameter d5 of protrusion and the diameter d6 of neck: 0.2mm≤d5-d6≤1mm.
Further, meet between the screw pitch t2 of the second thread segment and the screw pitch t1 of the first thread segment: 2 × t1≤t2≤3
×t1。
Further, the screw pitch t1 of the first thread segment is in 0.5mm between 1.5mm.
Further, the difference of the major diameter d2 and path d1 of the first thread segment meet: 1mm≤d2-d1≤2mm, the second screw thread
The difference of the major diameter d4 and path d3 of section meet: 3mm≤d4-d3≤5mm.
Further, the difference of the major diameter d2 of the path d3 and the first thread segment of the second thread segment meets: 0mm≤d3-d2≤
4mm。
Further, the path d1 of the first thread segment is in 3mm between 6mm.
Using the technical solution of the utility model, the first different thread segment of screw pitch and the second thread segment are arranged same
In root bone screws, so that bone screws adapt to cortex bone and cancellous bone simultaneously.Wherein, the screw pitch of the first thread segment is smaller, the second spiral shell
The screw pitch of line section is larger, and the second thread segment is arranged between the first thread segment and head, when the bone screws of the utility model
When needing across bone, the first thread segment can cooperate with the cortex bone far from head side, improve the fixed effect of bone screws.
The second thread segment protrudes into bone simultaneously, cooperates with cancellous bone, avoids the case where loosening between cancellous bone after moving.
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:
The structural schematic diagram when embodiment and fixed plate that Fig. 1 shows bone screws according to the present utility model cooperate；
Fig. 2 shows the A-A of the bone screws of Fig. 1 to schematic cross-sectional view；
Fig. 3 shows partial enlargement diagram at the bone screws of Fig. 1 and the B of fixed part；And
Fig. 4 shows the bone screws of Fig. 1 and the overlooking structure diagram of fixed part.
Wherein, the above drawings include the following reference numerals:
10, head；20, bar portion；21, the first thread segment；22, the second thread segment；30, backing stop structure；31, neck；32, convex
Portion；33, guiding surface；40, fixed plate.
Specific embodiment
The bone screws of the present embodiment are mainly used in clinical operation relevant to bone, play the fixed plates such as steel plate and bone
Being connected and fixed between bone, and then realize the effect of two bones of stable connection.Existing os integumentale screw is just for cortex bone
Design, cancellous bone screw are designed just for cancellous bone, when two kinds of bone screws and two kinds of sclerotin cross-references, although cortex murices
Nail starts to beat on cancellous bone, but os integumentale screw is it is possible that loosen, and cancellous bone screw is in skin after exercise
Crystallized ability on matter bone is poor, cannot achieve fixed function.The technical solution of the application regarding to the issue above carries out bone screws
It improves.
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of embodiments of the present application, instead of all the embodiments.Below
Description only actually at least one exemplary embodiment be it is illustrative, never as to the application and its application or making
Any restrictions.Based on the embodiment in the application, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, shall fall in the protection scope of this application.
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 scope of the present application processed of formula and numerical value.Simultaneously, it should be appreciated that for ease of description, each portion shown in attached drawing
The size divided not is to draw according to actual proportionate relationship.For technology, side known to person of ordinary skill in the relevant
Method and equipment may be not discussed in detail, but in the appropriate case, and the technology, method and apparatus should be considered as authorizing explanation
A part of book.In shown here and discussion all examples, any occurrence should be construed as merely illustratively, and
Not by way of limitation.Therefore, the other examples of exemplary embodiment can have different values.It should also be noted that similar label
Similar terms are indicated in following attached drawing with letter, therefore, once it is defined in a certain Xiang Yi attached drawing, then subsequent attached
It does not need that it is further discussed in figure.
As shown in Figure 1, the bone screws of the present embodiment include head 10 and bar portion 20.Wherein, head 10 is used to transmit torque,
Bar portion 20 is connected with head 10.Specifically, bar portion 20 includes the first thread segment 21 and the second thread segment 22, and the second thread segment 22 is set
It sets between the first thread segment 21 and head 10, the lead angle phase of the lead angle of the first thread segment 21 and the second thread segment 22
Deng, the first thread segment 21 screw pitch less than the second thread segment 22 screw pitch.
Using the technical solution of the present embodiment, the first different thread segment 21 of screw pitch and the second thread segment 22 are arranged same
In a piece bone screws, so that bone screws adapt to cortex bone and cancellous bone simultaneously.Wherein, the screw pitch of the first thread segment 21 is smaller, the
The screw pitch of two thread segments 22 is larger, and the second thread segment 22 is arranged between the first thread segment 21 and head 10, when this implementation
When the bone screws of example are needed across bone, the first thread segment 21 can cooperate with the cortex bone far from 10 side of head, improve bone
The fixed effect of screw.The second thread segment 22 protrudes into bone simultaneously, cooperates with cancellous bone, avoids after moving between cancellous bone
The case where loosening.
Specifically, as shown in Figure 1, the screw pitch t1 of the screw pitch t2 of second thread segment 22 of the present embodiment and the first thread segment 21
Between meet: 2 × t1≤t2≤3 × t1.
Preferably, the screw pitch t1 of the first thread segment 21 is in 0.5mm between 1.5mm.
Further, as shown in Figure 1, the difference of the major diameter d2 and path d1 of first thread segment 21 of the present embodiment meet: 1mm
The difference of≤d2-d1≤2mm, the major diameter d4 and path d3 of the second thread segment 22 meet: 3mm≤d4-d3≤5mm.Second thread segment
The difference of the major diameter d2 of 22 path d3 and the first thread segment 21 meets: 0mm≤d3-d2≤4mm.
Preferably, the path d1 of first thread segment 21 of the present embodiment is in 3mm between 6mm.
Above structure makes the bone screws of the present embodiment both operator was convenient for squeeze into bone screws in bone, while meeting murices
Structural strength between nail and bone.The bone screws of the present embodiment give full play to the first thread segment 21 and the second thread segment 22 respectively
Advantage, the bone density and bone structure of cortex bone and cancellous bone are adapted to while can be good, is securely attached to bone screws
In bone.
Further, as shown in Figures 2 and 3, it is provided with backing stop structure 30 between the head 10 and bar portion 20 of the present embodiment,
When bone screws cooperate with the fixed plate 40 for fix bone, backing stop structure 30 is for preventing bone screws from exiting.Existing bone
It is easy to skid off bone or fixed plate under the influence of gravity or movement when screw loosens between sclerotin, to patient
It damages.Even if remaining to be maintained at when the case where backing stop structure 30 of the present embodiment loosens the bone screws of the present embodiment
It is in situ, it prevents it from exiting relative to fixed plate 40, and then keep bone and the original relative position of fixed plate 40, reduces bone screws
Loosen the injury to patient.
Fixed plate is also likely to be prothesis implant body in other embodiments perhaps application environment or other need to be implanted into and suffer from
The intracorporal implantation material of person.
Specifically, as shown in Figure 3 and Figure 4, the backing stop structure 30 of the present embodiment includes the neck on connection head 10 and bar portion 20
Portion 31 and the protrusion 32 that 31 outer surface of neck is set, radially protruding of the protrusion 32 along neck 31.When the murices of the present embodiment
Protrusion 32 passes through the screw hole of fixed plate 40 when nail is screwed into bone, and neck 31 is threaded through in screw hole at this time, and protrusion 32 abuts
In fixed plate 40 towards the side of bone, prevent bone screws from exiting screw hole.
Further specifically, as shown in Figures 2 and 3, the protrusion 32 of the present embodiment includes circumferentially multiple, multiple
Protrusion 32 ensure that the retaining effect of backing stop structure 30.Meanwhile protrusion 32 is arranged towards the side of bar portion 20 in the present embodiment
There is guiding surface 33, in order to which protrusion 32 passes through screw hole.
In other embodiments, protrusion may be that the annulus of neck outer circumferential is arranged in or is provided with multiple scarce
The annulus of mouth.
Preferably, as shown in Fig. 2, meeting between the diameter d5 of the protrusion 32 of the present embodiment and the diameter d6 of neck 31:
0.2mm≤d5-d6≤1mm。
It can be seen from the above description that the above embodiments of the utility model achieve the following technical effects:
The first different thread segment of screw pitch and the second thread segment are arranged in same root bone screws, so that bone screws are simultaneously
Adapt to cortex bone and cancellous bone.Wherein, the screw pitch of the first thread segment is smaller, and the screw pitch of the second thread segment is larger, and the second spiral shell
Line section is arranged between the first thread segment and head, when the bone screws of the utility model are needed across bone, the first thread segment
It can cooperate with the cortex bone far from head side, improve the fixed effect of bone screws.The second thread segment protrudes into bone simultaneously,
Cooperate with cancellous bone, avoids the case where loosening between cancellous bone after moving.
In the description of the present application, it is to be understood that the noun of locality such as " front, rear, top, and bottom, left and right ", " laterally, vertical,
Vertically, orientation or positional relationship indicated by level " and " top, bottom " etc. is normally based on orientation or position shown in the drawings and closes
System is merely for convenience of description the application and simplifies description, and in the absence of explanation to the contrary, these nouns of locality do not indicate that
It must have a particular orientation or be constructed and operated in a specific orientation with the device or element for implying signified, therefore cannot manage
Solution is the limitation to the application protection scope；The noun of locality " inside and outside " refers to inside and outside the profile relative to each component itself.
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.
In addition, it should be noted that, limiting components using the words such as " first ", " second ", it is only for be convenient for
Corresponding components are distinguished, do not have Stated otherwise such as, there is no particular meanings for above-mentioned word, therefore should not be understood as to this
Apply for the limitation of protection scope.
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 bone screws characterized by comprising
Head (10), for transmitting torque；
Bar portion (20) is connected with the head (10), and the bar portion (20) includes the first thread segment (21) and the second thread segment
(22), second thread segment (22) is arranged between first thread segment (21) and the head (10), first spiral shell
The lead angle of line section (21) is equal with the lead angle of second thread segment (22), the screw pitch of first thread segment (21)
Less than the screw pitch of second thread segment (22).
2. bone screws according to claim 1, which is characterized in that be arranged between the head (10) and the bar portion (20)
There are backing stop structure (30), when the bone screws cooperate with the fixed plate for fix bone, the backing stop structure (30) is used for
Prevent the bone screws from exiting.
3. bone screws according to claim 2, which is characterized in that the backing stop structure (30) includes connecting the head
(10) and the neck (31) of the bar portion (20) and be arranged in the protrusion (32) of the neck (31) outer surface, the protrusion
(32) along the radially protruding of the neck (31).
4. bone screws according to claim 3, which is characterized in that protrusion (32) are annular or protrusion (32) include along week
To the multiple of arrangement, the side of protrusion (32) towards the bar portion (20) is provided with guiding surface (33).
5. bone screws according to claim 3, which is characterized in that the diameter d5 of the protrusion (32) and the neck (31)
Diameter d6 between meet: 0.2mm≤d5-d6≤1mm.
6. bone screws according to claim 1, which is characterized in that the screw pitch t2 of second thread segment (22) and described the
Meet between the screw pitch t1 of one thread segment (21): 2 × t1≤t2≤3 × t1.
7. bone screws according to claim 1, which is characterized in that the screw pitch t1 of first thread segment (21) is in 0.5mm
To between 1.5mm.
8. bone screws according to claim 1, which is characterized in that the major diameter d2 and path d1 of first thread segment (21)
Difference meet: the difference of 1mm≤d2-d1≤2mm, the major diameter d4 and path d3 of second thread segment (22) satisfaction: 3mm≤d4-
d3≤5mm。
9. bone screws according to claim 1, which is characterized in that the path d3 of second thread segment (22) and described the
The difference of the major diameter d2 of one thread segment (21) meets: 0mm≤d3-d2≤4mm.
10. bone screws according to claim 1, which is characterized in that the path d1 of first thread segment (21) 3mm extremely
Between 6mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820011163.3U CN208710037U (en) | 2018-01-03 | 2018-01-03 | Bone screws |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820011163.3U CN208710037U (en) | 2018-01-03 | 2018-01-03 | Bone screws |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208710037U true CN208710037U (en) | 2019-04-09 |
Family
ID=65968622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820011163.3U Active CN208710037U (en) | 2018-01-03 | 2018-01-03 | Bone screws |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208710037U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108113743A (en) * | 2018-01-03 | 2018-06-05 | 北京爱康宜诚医疗器材有限公司 | Bone screws |
-
2018
- 2018-01-03 CN CN201820011163.3U patent/CN208710037U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108113743A (en) * | 2018-01-03 | 2018-06-05 | 北京爱康宜诚医疗器材有限公司 | Bone screws |
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