CN205795789U - absorbable bone screw - Google Patents
absorbable bone screw Download PDFInfo
- Publication number
- CN205795789U CN205795789U CN201521128891.5U CN201521128891U CN205795789U CN 205795789 U CN205795789 U CN 205795789U CN 201521128891 U CN201521128891 U CN 201521128891U CN 205795789 U CN205795789 U CN 205795789U
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- China
- Prior art keywords
- polylactic acid
- bar segment
- screw
- nano
- calcium carbonate
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Abstract
The utility model discloses absorbable bone screw, it includes head of screw, polylactic acid bar segment and the nano-calcium carbonate bar segment being sequentially connected with, the spiral groove that the inside of head of screw and polylactic acid bar segment is communicated with, one end of spiral groove connects with the outer peripheral face of head of screw at polylactic acid bar segment inner sealing, the other end；The peripheral circumferential face of described polylactic acid bar segment is provided with nano-calcium carbonate screw thread, and the peripheral circumferential face of nano-calcium carbonate bar segment is provided with polylactic acid screw thread；The inside of described polylactic acid bar segment is provided with multiple micro-hole, is filled with hydroxyapatite material or chitosan material in micro-hole.This utility model initial stage steadiness is good, later stage good biocompatibility, and can reduce the generation of aseptic inflammation reaction, practical convenient.
Description
Technical field
This utility model relates to bone surgery set field, is specifically related to absorbable bone screw.
Background technology
In conventional art, the cervical region of absorbable bone screw is simple without spiro rod section, itself and surrounding bone exist certain between
Gap, it is impossible to play the effect of firm surrounding bone after surgery.
In correlation technique, invent the complete thread screw that can fix surrounding bone immediately, but this complete thread screw has been deposited
Being rigidly connected, may produce increase stress in using on screw-bone interface, its load will be from bone conduction to complete thread screw
And make complete thread screw absorb and carrying major part stress, produce stress shielding, after complete thread screw is removed, it is possible to produce
The secondary breakdown of bone, additionally, this rigid structure fixes the small movements inhibiting fracture portions, poor biocompatibility, unfavorable
Later stage rehabilitation in fracture.
Summary of the invention
For the problems referred to above, this utility model problem to be solved is to provide that a kind of initial stage steadiness is good, later stage bio-compatible
Property good absorbable bone screw, solve tradition absorbable bone screw poor rigidity and complete thread screw suppression fracture portions micromotion
Problem.
For solving above-mentioned technical problem, the technical solution adopted in the utility model is:
Absorbable bone screw, including the head of screw being sequentially connected with, polylactic acid bar segment and nano-calcium carbonate bar segment, described screw
The spiral groove that the inside of head and polylactic acid bar segment is communicated with, one end of described spiral groove is sealed in polylactic acid bar segment
Closing, the other end connects with the outer peripheral face of head of screw；The peripheral circumferential face of described polylactic acid bar segment is provided with nano-calcium carbonate screw thread,
The peripheral circumferential face of described nano-calcium carbonate bar segment is provided with polylactic acid screw thread.
Further, described absorbable bone screw also includes union joint, the outer surface of described union joint removably with institute
State spiral groove coupling to connect.By the setting of union joint, user can be got involved the combination of surrounding bone and can be screwed into
Or taking-up absorbable bone screw.
Further, described nano-calcium carbonate bar segment is mixed by nano-calcium carbonate and polylactic acid, it is preferable that nano-sized carbon
The content of acid calcium and polylactic acid ratio is for 6:4.
Further, the inside of described polylactic acid bar segment is provided with multiple micro-hole, is filled with hydroxyl phosphorus in described micro-hole
Ash stone material or chitosan material.Owing to the polymer fragment crystallization of polylactic acid degraded later stage low-molecular-weight is difficult to be absorbed,
Polylactic acid absorb in vivo the later stage (4～5 years) there will be likely some aseptic inflammation reaction, in polylactic acid bar segment add hydroxyl
The alkalescence of Apatite materials or chitosan material, hydroxyapatite material or chitosan material can promote that polylactic acid is oligomeric
Thing hydrolyzes further, thus accelerates the absorption of later stage polylactic acid, and has little influence on the decay rule of polylactic acid mechanical strength in early days
Rule, additionally, hydroxyapatite has the effect promoting skeletonization the most simultaneously.
Preferably, the external diameter of described polylactic acid screw thread is more than the external diameter of nano-calcium carbonate screw thread.
Preferably, the length of described polylactic acid bar segment is more than the length of nano-calcium carbonate bar segment.
This utility model has the beneficial effects that:
1, initial stage steadiness is good, later stage good biocompatibility, by arranging the polylactic acid bar segment of band nano-calcium carbonate screw thread
With the nano-calcium carbonate bar segment of band polylactic acid screw thread, can after surgery the initial stage play the effect of firm bone about immediately, and
Again along with polylactic acid bar segment and the degraded of polylactic acid screw thread, intensity is gradually reduced, and fracture small movements is gradually increased simultaneously, promotees
Enter healing；
2, by arranging multiple hydroxyapatite material or chitosan material of being filled with in the inside of polylactic acid bar segment
Micro-hole, can promote the absorption of polylactic acid on the premise of the attenuation law having little influence on polylactic acid mechanical strength in early days, subtract
The generation of few aseptic inflammation reaction；
3, easy to use, by the setting of union joint, user can get involved the combination of surrounding bone can be screwed into or
Take out absorbable bone screw.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Wherein, head of screw 1, polylactic acid bar segment 2, nano-calcium carbonate bar segment 3, spiral groove 4, nano-calcium carbonate screw thread 5,
Micro-hole 6, polylactic acid screw thread 7.
Detailed description of the invention
In conjunction with accompanying drawing, this utility model structure is described further.
Seeing Fig. 1, absorbable bone screw of the present utility model, including the head of screw 1 being sequentially connected with, polylactic acid bar segment 2 and
Nano-calcium carbonate bar segment 3, the spiral groove 4 that the inside of described head of screw 1 and polylactic acid bar segment 2 is communicated with, described spiral
One end of connected in star 4 connects with the outer peripheral face of head of screw 1 at polylactic acid bar segment 2 inner sealing, the other end；Described polylactic acid bar segment 2
Peripheral circumferential face be provided with nano-calcium carbonate screw thread 5, the peripheral circumferential face of described nano-calcium carbonate bar segment 3 is provided with polylactic acid
Screw thread 7.
Further, described absorbable bone screw also includes union joint, the outer surface of described union joint removably with institute
State spiral groove 4 coupling to connect.By the setting of union joint, user can be got involved the combination of surrounding bone and can be screwed into
Or taking-up absorbable bone screw.
Further, described nano-calcium carbonate bar segment 3 is mixed by nano-calcium carbonate and polylactic acid, wherein nano-calcium carbonate
The content of calcium and polylactic acid is than for 6:4.
Further, the inside of described polylactic acid bar segment 2 is provided with multiple micro-hole 6, is filled with hydroxyl in described micro-hole 6
Apatite materials.Owing to the polymer fragment crystallization of polylactic acid degraded later stage low-molecular-weight is difficult to be absorbed, polylactic acid is in vivo
Absorption later stage (4～5 years) there will be likely some aseptic inflammation reaction, adds hydroxyapatite material in polylactic acid bar segment 2,
The alkalescence of hydroxyapatite material can promote that polylactic acid low polymer hydrolyzes further, thus accelerates the absorption of later stage polylactic acid,
And have little influence on the attenuation law of polylactic acid in early days mechanical strength, additionally, hydroxyapatite has promotes skeletonization the most simultaneously
Effect.
Further, the external diameter of described polylactic acid screw thread 7 is more than the external diameter of nano-calcium carbonate screw thread 5.
Further, the length of described polylactic acid bar segment 2 is more than the length of nano-calcium carbonate bar segment 3.
Last it is noted that above example is only in order to illustrate the technical scheme of the invention, it is not intended to limit；
Although the invention being described in detail with reference to previous embodiment, it will be understood by those within the art that:
Technical scheme described in foregoing embodiments still can be modified by it, or carries out wherein portion of techniques feature
With replacing；And these amendments or replacement, do not make the essence of appropriate technical solution depart from the invention each embodiment technology
The spirit and scope of scheme.
Claims (6)
1. absorbable bone screw, is characterized in that: include head of screw, polylactic acid bar segment and the nano-calcium carbonate bar segment being sequentially connected with,
The spiral groove that the inside of described head of screw and polylactic acid bar segment is communicated with, one end of described spiral groove is at polylactic acid
Bar segment inner sealing, the other end connects with the outer peripheral face of head of screw；The inside of described polylactic acid bar segment is provided with multiple micro-hole；Described
The peripheral circumferential face of polylactic acid bar segment is provided with nano-calcium carbonate screw thread, and the peripheral circumferential face of described nano-calcium carbonate bar segment sets
There is polylactic acid screw thread.
Absorbable bone screw the most according to claim 1, is characterized in that: be filled with hydroxy-apatite stone material in described micro-hole
Material.
Absorbable bone screw the most according to claim 1, is characterized in that: be filled with chitosan material in described micro-hole.
Absorbable bone screw the most according to claim 1, is characterized in that: the external diameter of described polylactic acid screw thread is more than nano-sized carbon
The external diameter of acid calcium screw thread.
Absorbable bone screw the most according to claim 1, is characterized in that: the length of described polylactic acid bar segment is more than nano-sized carbon
The length of acid calcium bar segment.
Absorbable bone screw the most according to claim 1, is characterized in that: also include union joint, the appearance of described union joint
Face is removably connected with described spiral groove coupling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521128891.5U CN205795789U (en) | 2015-12-28 | 2015-12-28 | absorbable bone screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521128891.5U CN205795789U (en) | 2015-12-28 | 2015-12-28 | absorbable bone screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205795789U true CN205795789U (en) | 2016-12-14 |
Family
ID=58144147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521128891.5U Active CN205795789U (en) | 2015-12-28 | 2015-12-28 | absorbable bone screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205795789U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109223147A (en) * | 2018-10-22 | 2019-01-18 | 秦家燕 | A kind of new and effective type spicule that is drawn out easily |
| CN109223156A (en) * | 2018-10-20 | 2019-01-18 | 贾云云 | A kind of novel outer fixed bone spicule structure |
| CN111407387A (en) * | 2020-03-10 | 2020-07-14 | 昶盛(物料应用制品)有限公司 | Screw assembly for bone fixation and bone fixation device |
| CN113440193A (en) * | 2021-05-13 | 2021-09-28 | 花沐医疗科技(上海)有限公司 | Composite absorbable interface screw and preparation method thereof |
-
2015
- 2015-12-28 CN CN201521128891.5U patent/CN205795789U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109223156A (en) * | 2018-10-20 | 2019-01-18 | 贾云云 | A kind of novel outer fixed bone spicule structure |
| CN109223156B (en) * | 2018-10-20 | 2021-10-12 | 任敏 | External fixation spicule structure |
| CN109223147A (en) * | 2018-10-22 | 2019-01-18 | 秦家燕 | A kind of new and effective type spicule that is drawn out easily |
| CN109223147B (en) * | 2018-10-22 | 2021-09-10 | 桂林医学院附属医院 | Bone needle easy to pull out |
| CN111407387A (en) * | 2020-03-10 | 2020-07-14 | 昶盛(物料应用制品)有限公司 | Screw assembly for bone fixation and bone fixation device |
| WO2021180076A1 (en) * | 2020-03-10 | 2021-09-16 | 昶盛(物料应用制品)有限公司 | Screw assembly for bone fixation, and bone fixation device |
| CN113440193A (en) * | 2021-05-13 | 2021-09-28 | 花沐医疗科技(上海)有限公司 | Composite absorbable interface screw and preparation method thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |