CN108113743A - Bone screws - Google Patents
Bone screws Download PDFInfo
- Publication number
- CN108113743A CN108113743A CN201810005290.7A CN201810005290A CN108113743A CN 108113743 A CN108113743 A CN 108113743A CN 201810005290 A CN201810005290 A CN 201810005290A CN 108113743 A CN108113743 A CN 108113743A
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- CN
- China
- Prior art keywords
- thread segment
- bone
- bone screws
- head
- protrusion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/8625—Shanks, i.e. parts contacting bone tissue
- A61B17/863—Shanks, i.e. parts contacting bone tissue with thread interrupted or changing its form along shank, other than constant taper
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- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Neurology (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
Abstract
The present invention provides a kind of bone screws, including：Head, for transferring 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, and the screw pitch of the first thread segment is less than the screw pitch of the second thread segment.Technical scheme efficiently solve the problems, such ass that screw easily loosens abjection after surgery in the prior art.
Description
Technical field
The present invention relates to medical instruments field, in particular to a kind of bone screws.
Background technology
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 form, be distributed in long bone backbone and
The surface of other types bone.The bone density of cancellous bone is less than cortex bone, and high resilience；The scaffolding structure of cancellous bone contributes to
Skeletal form is maintained, renitency forms most axial bone such as skull, rib cage, spinal bone.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 threading path and the large percentage in stud footpath, 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..
The content of the invention
The present invention is intended to provide a kind of bone screws, easily loosen asking for abjection after surgery to solve screw in the prior art
Topic.
To achieve these goals, the present invention provides a kind of bone screws, including：Head, for transferring torque；Bar portion,
Be connected with head, bar portion includes the first thread segment and the second thread segment, the second thread segment be arranged on the first thread segment and head it
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 the second spiral shell
The screw pitch of line section.
Further, backing stop structure is provided between head and bar portion, when bone screws and the fixed plate for fix bone
During cooperation, backing stop structure is used to prevent bone screws from exiting.
Further, backing stop structure includes the neck on connection head and bar portion and is arranged on the protrusion of exterior,
Radially protruding of the protrusion along neck.
Further, protrusion includes circumferentially multiple for annular or protrusion, and the one 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 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 in 3mm between 6mm.
It applies the technical scheme of the present invention, the first different thread segment of screw pitch and the second thread segment is arranged on same root bone
On screw, 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 thread segment
Screw pitch it is larger, and the second thread segment is arranged between the first thread segment and head, when the bone screws of the present invention need through
During bone, the first thread segment can coordinate with the cortex bone away from head one side, improve the fixed effect of bone screws.While second
Thread segment is stretched into bone, is coordinated with cancellous bone, occurs situation about loosening between cancellous bone after avoiding movement.
Description of the drawings
The accompanying drawings which form a part of this application are used for providing a further understanding of the present invention, and of the invention shows
Meaning property embodiment and its explanation do not constitute improper limitations of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 shows the structure diagram when embodiment of bone screws according to the present invention coordinates with fixed plate；
Fig. 2 shows the A-A of the bone screws of Fig. 1 to schematic cross-sectional view；
Fig. 3 shows close-up schematic view 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 the structure diagram of fixed part.
Wherein, above-mentioned attached drawing is marked including the following drawings：
10th, head；20th, bar portion；21st, the first thread segment；22nd, the second thread segment；30th, backing stop structure；31st, neck；32nd, it is convex
Portion；33rd, guiding surface；40th, fixed plate.
Specific embodiment
The bone screws of the present embodiment are mainly used in in the relevant clinical operation of bone, playing the fixed plates such as steel plate and bone
Connection between bone is fixed, and then realizes 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, can not realize 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, the technical solution in the embodiment of the present application is carried out clear, complete
Site preparation describes, 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 is illustrative, is never used as to the application and its application or makes
Any restrictions.Based on the embodiment in the application, those of ordinary skill in the art are not making creative work premise
Lower all other embodiments 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 singulative
It is also intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " bag
Include " when, indicate existing characteristics, step, operation, device, component and/or combination thereof.
Unless specifically stated otherwise, the component and positioned opposite, the digital table of step otherwise illustrated 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 be drawn 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, the technology, method and apparatus should be considered as authorizing explanation
A part for book.In shown here and discussion all examples, any occurrence should be construed as merely illustrative, and
Not by way of limitation.Therefore, the other examples of exemplary embodiment can have different values.It should be noted that：Similar label
Similar terms is represented in following attached drawing with letter, therefore, once it is defined in a certain Xiang Yi attached drawing, then subsequent attached
It need not be 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 transfer 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 puts 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
Screw pitch Deng, the first thread segment 21 is less than the screw pitch of the second thread segment 22.
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 on together
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 through bone, the first thread segment 21 can coordinate with the cortex bone away from 10 one side of head, improve bone
The fixed effect of screw.The second thread segment 22 is stretched into bone simultaneously, is coordinated with cancellous bone, is avoided after moving between cancellous bone
There is situation about 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 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 in 3mm between 6mm.
Said structure makes the bone screws of the present embodiment, and both person easy to operation squeezes into bone screws in bone, while meets 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 each
Advantage, cortex bone and the bone density and bone structure of cancellous bone are adapted to while can be well, is securely attached to bone screws
In bone.
Further, as shown in Figures 2 and 3, backing stop structure 30 is provided between the head 10 of the present embodiment and bar portion 20,
When bone screws for the fixed plate 40 of fix bone with coordinating, backing stop structure 30 is used to prevent bone screws from exiting.Existing bone
Bone or fixed plate are easily skidded off when screw loosens between sclerotin under the influence of gravity either movement, to patient
It damages.Even if the backing stop structure 30 of the present embodiment makes the bone screws of the present embodiment remain to be maintained at when there is situation about loosening
It is in situ, prevent it from being exited compared with fixed plate 40, and then bone and 40 original relative position of fixed plate are kept, reduce bone screws
Loosen the injury to patient.
Fixed plate is also likely to be prothesis implant body in other embodiment either application environment or other need to be implanted into and suffer from
The in vivo 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 of connection head 10 and bar portion 20
Portion 31 and the protrusion 32 for being arranged on 31 outer surface of neck, 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 one 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 set towards the one 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 or be arranged on the annulus of neck outer circumferential or be provided with it is multiple lack
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 present invention realize following technique effect：
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, and when the bone screws of the present invention are needed through bone, the first thread segment can
Coordinate with the cortex bone away from head one side, improve the fixed effect of bone screws.The second thread segment is stretched into bone simultaneously, with pine
Matter bone coordinates, and occurs situation about loosening between cancellous bone after avoiding movement.
In the description of the present application, it is to be understood that the noun of locality such as " forward and backward, upper and lower, left and right ", " laterally, vertical,
Vertically, orientation or position relationship indicated by level " and " top, bottom " etc. are normally based on orientation or position shown in the drawings and close
System is for only for ease of description the application and simplifies description, and in the case where not making explanation on the contrary, these nouns of locality do not indicate that
There must be specific orientation with the device or element for implying meaning or with specific azimuth configuration and operation, therefore cannot manage
It solves as the limitation to the application protection domain；The noun of locality " inside and outside " refers to compared with inside and outside each component profile in 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 appreciated that spatially relative term is intended to comprising the orientation except device described in figure
Outside different azimuth in use or operation.For example, if the device in attached drawing is squeezed, it is described as " in other devices
It will be positioned as " under other devices or construction after the device of part or construction top " or " on other devices or construction "
Side " or " under other devices or construction ".Thus, exemplary term " ... top " can include " ... top " and
" in ... lower section " two kinds of orientation.The device can also other different modes positioning (being rotated by 90 ° or in other orientation), and
And respective explanations are made to the opposite description in space used herein above.
Furthermore, it is necessary to explanation, limits parts, it is only for be convenient for using the words such as " first ", " second "
Corresponding parts are distinguished, such as without Stated otherwise, above-mentioned word is there is no particular meaning, therefore it is not intended that this
Apply for the limitation of protection domain.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of bone screws, which is characterized in that including：
Head (10), for transferring 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 set between the head (10) and the bar portion (20)
There is backing stop structure (30), when the bone screws for the fixed plate of fix bone with coordinating, 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 of the bar portion (20) (31) and the protrusion (32) for being arranged on 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) include for annular or protrusion (32) along week
To the multiple of arrangement, the one 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) meet：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) in 3mm extremely
Between 6mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810005290.7A CN108113743A (en) | 2018-01-03 | 2018-01-03 | Bone screws |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810005290.7A CN108113743A (en) | 2018-01-03 | 2018-01-03 | Bone screws |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108113743A true CN108113743A (en) | 2018-06-05 |
Family
ID=62232696
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810005290.7A Pending CN108113743A (en) | 2018-01-03 | 2018-01-03 | Bone screws |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108113743A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110179568A (en) * | 2019-05-29 | 2019-08-30 | 北京市春立正达医疗器械股份有限公司 | Anti-back screw assembly and the prosthese for applying it |
| CN110192934A (en) * | 2019-05-29 | 2019-09-03 | 北京市春立正达医疗器械股份有限公司 | Alaossisilii filling prosthesis |
| CN110192937A (en) * | 2019-05-29 | 2019-09-03 | 北京市春立正达医疗器械股份有限公司 | Centrum prosthese |
| CN110192936A (en) * | 2019-05-29 | 2019-09-03 | 北京市春立正达医疗器械股份有限公司 | Ankle prosthesis |
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| CN201088622Y (en) * | 2007-09-19 | 2008-07-23 | 东莞市厚街医院 | Internal and external hexagon hollow pressure titanium bolt |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110179568A (en) * | 2019-05-29 | 2019-08-30 | 北京市春立正达医疗器械股份有限公司 | Anti-back screw assembly and the prosthese for applying it |
| CN110192934A (en) * | 2019-05-29 | 2019-09-03 | 北京市春立正达医疗器械股份有限公司 | Alaossisilii filling prosthesis |
| CN110192937A (en) * | 2019-05-29 | 2019-09-03 | 北京市春立正达医疗器械股份有限公司 | Centrum prosthese |
| CN110192936A (en) * | 2019-05-29 | 2019-09-03 | 北京市春立正达医疗器械股份有限公司 | Ankle prosthesis |
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Application publication date: 20180605 |