CN202458649U - Fusion type screw capable of being fixed in spine - Google Patents
Fusion type screw capable of being fixed in spine Download PDFInfo
- Publication number
- CN202458649U CN202458649U CN2011205345876U CN201120534587U CN202458649U CN 202458649 U CN202458649 U CN 202458649U CN 2011205345876 U CN2011205345876 U CN 2011205345876U CN 201120534587 U CN201120534587 U CN 201120534587U CN 202458649 U CN202458649 U CN 202458649U
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Abstract
The utility model provides a fusion type screw capable of being fixed in a spine. The screw comprises a screw nut section and a bone joint section connected with the screw nut section, wherein the bone joint section comprises a solid part and a pore fusion part fixedly arranged on the surface of the solid part; and a pore structure fit with spine sclerotin is formed on the pore fusion part. According to the fusion type screw capable of being fixed in the spine provided by the utility model, the pore fusion part of the bone joint section is designed to be in the pore structure which is beneficial to the growth of bone cells into the pore structure after the fusion type screw is implanted in the sclerotin, so that the sclerotin is fused with the screw, and the fusion type screw can be effectively prevented from loosening, degenerating and dislocating for a long period by virtue of a finally-formed bone fusion state.
Description
Technical field
This utility model relates to the internal fixation of spine field, more specifically, relates to a kind of pattern of fusion internal fixation of spine screw.
Background technology
Spinal column is the axis pillar of human body, and top links to each other with the occipital bone of skull bottom, the through coccyx in bottom is terminal.Spinal column is connected by intervertebral disc, articuli intervertebrales and many ligaments by vertebra, rumpbone and coccyx; Be the hinge that activity centre and the mechanics of trunk transmits, bearing and supporting body weight, damping, protection central nervous system, providing the front and back of health the first half to stretch in the wrong, lateral bending, motor function such as reversing.Because the variation of modern humans's life style, the quickening of rhythm of life causes the load aggravation of spinal column and surrounding tissue, and the damage chance greatly increases, and the probability of spinal column morbidity constantly rises.Damage of common spinal disease such as wound, tumor, congenital malformation, tuberculosis, rheumatoid arthritis or the like vertebra vertebral body that pathological changes caused and disappearance happen occasionally.
The internal fixation of spine technology has day by day become the conventional therapy means of treatment spinal fracture, centrum olisthe, tumor of spine, malformation correction or the like; Normally used spinal internal fixation system comprises spinal column front and back traffic stud plate system, nail-stick system and intervertebral fusion and vertebral fusion system; Purpose provides the early stage stable bone property fusion that is beneficial to spinal column, but the risk that still has screw regression dislocation at a specified future date.In numerous fixed systems, will use various metal bone screw for example steel plate screw, pedicle screw etc. mostly, this type of bone screw is designed with and bonded screw thread of sclerotin and the head of a nail structure docking, be connected with associated components usually.The bone thread smooth surface of existing bone screw is easy to spinning in and out, is beneficial to operation, thereby but has also strengthened loosening moving back of later stage and followed closely the risk that causes internal fixation system to lose efficacy.
The utility model content
This utility model purpose is to provide a kind of pattern of fusion internal fixation of spine screw that prevents the loosening and regression of screw.
Pattern of fusion internal fixation of spine screw according to this utility model; Comprise head of a nail section and the synosteosis section that is connected with head of a nail section; The synosteosis section comprises entity portion and the lip-deep hole fusion portion that is fixedly installed on entity portion, has in the hole fusion portion to be used for the pore structure that fits with the spinal column sclerotin.
Further, entity portion comprises the entity strengthening core that extends along the axial direction of hold-down screw and is arranged on entity strengthening core form of thread portion on every side twist.
Further, hole fusion portion is arranged in the pitch space of form of thread portion.
Further, hole fusion portion is distributed in the end away from head of a nail section of form of thread portion.
Further, the inboard entity strengthening core of hole fusion portion is provided with and merges the hole, merges the hole and is the hole of axially running through one or more form of thread along hold-down screw.
Further, the crest of form of thread portion protrudes in the outer surface of said fusion portion.
Further, hole fusion portion is multiwalled pore structure, and pore structure comprises a plurality of holes that are interconnected.
Further, the aperture of pore structure is D, wherein, and 50 μ m≤D≤1200 μ m.
Further, first end of entity strengthening core be connected with head of a nail section and its first end tapered, have the bone space of growing between entity strengthening core and the form of thread portion.
Further, form of thread portion is wrapped on the entity strengthening core and is connected with the entity strengthening core at the root of its tooth form.
Further, the whole or part on the surface of synosteosis section has hydroxyapatite coating layer.
Adopt the pattern of fusion internal fixation of spine screw of this utility model; The hole fusion portion of synosteosis section is designed to pore structure; This pore structure helps osteocyte after pattern of fusion internal fixation of spine screw is implanted in the sclerotin grows into and forms the fusion of sclerotin and screw to pore structure inside, and the final bone that forms merges state and can reach and prevent that long-term effectively this pattern of fusion internal fixation of spine screw from the effect of loosening regression dislocation taking place.
Description of drawings
The accompanying drawing that constitutes the application's a part is used to provide the further understanding to this utility model, and illustrative examples of this utility model and explanation thereof are used to explain this utility model, do not constitute the improper qualification to this utility model.In the accompanying drawings:
Fig. 1 is the structural representation according to first embodiment of the pattern of fusion internal fixation of spine screw of this utility model;
Fig. 2 is the structural representation of entity portion of the pattern of fusion internal fixation of spine screw of Fig. 1;
Fig. 3 is the structural representation according to second embodiment of the pattern of fusion internal fixation of spine screw of this utility model;
Fig. 4 is the structural representation of entity portion of the pattern of fusion internal fixation of spine screw of Fig. 3;
Fig. 5 is the structural representation according to the 3rd embodiment of the pattern of fusion internal fixation of spine screw of this utility model;
Fig. 6 is the structural representation of entity portion of the pattern of fusion internal fixation of spine screw of Fig. 5;
Fig. 7 is the structural representation according to the 4th embodiment of the pattern of fusion internal fixation of spine screw of this utility model;
Fig. 8 is the structural representation according to the 5th embodiment of the pattern of fusion internal fixation of spine screw of this utility model;
Fig. 9 is the structural representation according to the 6th embodiment of the pattern of fusion internal fixation of spine screw of this utility model;
Figure 10 is the structural representation according to the pore structure layer of the pattern of fusion internal fixation of spine screw of this utility model.
The specific embodiment
Below with reference to accompanying drawing and combine embodiment to specify this utility model.
The pattern of fusion internal fixation of spine screw of this utility model as shown in Figure 1; Comprise head of a nail section 20 and the synosteosis section 10 that is connected with head of a nail section 20; It is characterized in that; Synosteosis section 10 comprises entity portion 12 and the lip-deep hole fusion portion 11 that is fixedly installed on entity portion 12, has pore structure in the hole fusion portion 11, and hole fusion portion 11 fits with the spinal column sclerotin.
The hole fusion portion 11 of the synosteosis section 10 that the pattern of fusion internal fixation of spine screw of this utility model proposes to the defective of prior art to fit with sclerotin is designed to pore structure; This pore structure helps osteocyte after pattern of fusion internal fixation of spine screw is implanted in the sclerotin grows into and forms the fusion of sclerotin and screw to pore structure inside, thoroughly prevents the loosening and regression of following screw thus.
According to first embodiment of this utility model, as shown in Figure 1, a kind of pattern of fusion internal fixation of spine screw, it comprises synosteosis section 10 and head of a nail section 20, pattern of fusion internal fixation of spine screw adopts medical metal to process, so it has excellent biological compatibility.
As shown in Figure 1, hole fusion portion 11 is arranged in the pitch space of form of thread portion 121.Hole fusion portion 11 is multiwalled pore structure, and pore structure comprises a plurality of holes that are interconnected.
In the present embodiment, preferably as shown in Figure 1, be that transitional type is whole between hole fusion portion 11 and the entity portion 12, there is not tangible layering boundary to guarantee the mechanical strength of transition aspect.
The all surperficial or part of the synosteosis section 10 of pattern of fusion internal fixation of spine screw has hydroxyapatite coating layer, and this hydroxyapatite coating layer has the function of inducing the osteocyte growth.
The pattern of fusion internal fixation of spine screw of this utility model has different designs to adapt to the needs of various fixed positions in head of a nail section 20.For example the head of a nail section 20 of first embodiment shown in Fig. 1 to 6, second embodiment and the 3rd embodiment is the excellent fixedly fixedly pedicle screw medicated cap of usefulness of nail; The head of a nail section 20 of the 4th embodiment shown in Figure 7 is the conventional screw cap of steel plate fixed pattern; The 5th embodiment shown in Figure 8 is the excellent fixedly break-in screw cap of usefulness of nail; The 6th embodiment shown in Figure 9 is the special type screw medicated cap of steel plate fixed pattern; And the pedicle screw medicated cap (not shown) of non-fusion dynamic flexible fixed system etc., can adapt to the multiple different purposes of pattern of fusion internal fixation of spine screw.
The synosteosis section 10 of this utility model can have various ways.
As shown in Figure 2, in first embodiment of this utility model, form of thread portion 121 is wrapped on the entity strengthening core 122 and is connected with entity strengthening core 122 at the root of its tooth form.The crest of form of thread portion 121 protrudes in the outer surface of hole fusion portion 11.The form of thread portion 121 of the hold-down screw of this kind form is as a whole with entity strengthening core 122, so the pattern of fusion internal fixation of spine screw in the present embodiment has enough mechanical strengths.
As shown in Figure 4, according to second embodiment of this utility model, first end of entity strengthening core 122 be connected with head of a nail section 20 and its first end tapered, have the bone space of growing between entity strengthening core 122 and the form of thread portion 121.In the present embodiment, form of thread portion 121 only is connected with entity strengthening core 122 at its end near head of a nail section 20, and the center and the other end all are looped around not contacting with entity strengthening core 122 of entity strengthening core 122 on every side.Synosteosis section 10 structure shown in Figure 2 relatively of this kind form has the more bone space of growing into, and this kind structure is lighter and handier.
Like Fig. 5 and shown in Figure 6, according to the 3rd embodiment of this utility model, hole fusion portion 11 is distributed in the end away from head of a nail section 20 of form of thread portion 121.Hole fusion portion 11 inboard entity strengthening cores 122 are provided with and merge the hole, merge the hole and are the hole of axially running through one or more form of thread along hold-down screw.In the present embodiment, hole fusion portion 11 only is distributed in an end of head of a nail section 20, and entity reinforced 122 is provided with the fusion hole 123 that supplies bone to grow into.The synosteosis section 10 of this kind structure only processes hole fusion portion 11 at the end away from head of a nail section 20; And still constitute by metal solid near the form of thread portion 121 of head of a nail section 20, can make the form of thread portion 121 near head of a nail section 20 of stressed maximum keep better mechanical state like this.
This utility model pattern of fusion internal fixation of spine screw; Employing has the medical metal of good biocompatibility and processes; The surface and the inside of this pore structure layer have a plurality of ducts that are interconnected; This pore structure layer and sclerotin closely contact and help the growing into to obtain long-term stability of osteocyte, and pore structure layer structure is shown in figure 10.This utility model utilizes laser or high-power electron beam rapid shaping technique melt molding manufacturing hole gap structure layer, and method is following:
1, the three-dimensional data model of design-build pore structure layer in computer;
2, use professional software that three-dimensional data model is carried out layering, to obtain the outline data of a series of monolayer slices;
3, import above-mentioned serial synusia data to laser or high-power electron beam rapid forming equipment;
The metal or the ceramic powders of floor height respective thickness when 4, in laser or high-power electron beam rapid forming equipment processing cabin, laying with aforementioned three-dimensional data model layering;
5, by computer controlled controlling laser beam or high-power electron beam to metal or ceramic powders scans and selectively fusing;
6, repeat aforementioned laying powder, scanning fusing step so that each layer is selected the mutual clinkering one-tenth of the material of fusing integral body;
7, remove the pore structure layer that not fused powder can obtain required shape and structure behind the melting process of the whole aspects of completion.
Adopt laser or high-power electron beam rapid shaping technique melt molding to obtain hole fusion portion and entity portion; And then obtain the fit structure of corresponding head of a nail section and other parts through conventional mechanical cutting working methods such as lathe milling machines; Carry out or do not carry out machining according to design demand for synosteosis Duan Ze; Processing arrangement is reasonable, realizes than being easier to.
The pattern of fusion internal fixation of spine screw of this utility model; The hole fusion portion of synosteosis section is designed to pore structure; This pore structure helps osteocyte after pattern of fusion internal fixation of spine screw is implanted in the sclerotin grows into and forms the fusion of sclerotin and screw to pore structure inside, and the final bone that forms merges state and can reach and prevent that long-term effectively this pattern of fusion internal fixation of spine screw from the effect of loosening regression dislocation taking place.
The preferred embodiment that the above is merely this utility model is not limited to this utility model, and for a person skilled in the art, this utility model can have various changes and variation.All within the spirit and principle of this utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of this utility model.
Claims (11)
1. pattern of fusion internal fixation of spine screw; Comprise head of a nail section (20) and the synosteosis section (10) that is connected with said head of a nail section (20); It is characterized in that; Said synosteosis section (10) comprises entity portion (12) and is fixedly installed on the lip-deep hole fusion portion (11) of said entity portion (12), has in the said hole fusion portion (11) to be used for the pore structure that fits with the spinal column sclerotin.
2. pattern of fusion internal fixation of spine screw according to claim 1; It is characterized in that said entity portion (12) comprises along the entity strengthening core (122) of the axial direction extension of said hold-down screw and is arranged on said entity strengthening core (122) form of thread portion (121) on every side twist.
3. pattern of fusion internal fixation of spine screw according to claim 2 is characterized in that said hole fusion portion (11) is arranged in the pitch space of said form of thread portion (121).
4. pattern of fusion internal fixation of spine screw according to claim 3 is characterized in that, said hole fusion portion (11) is distributed in the end away from said head of a nail section (20) of said form of thread portion (121).
5. pattern of fusion internal fixation of spine screw according to claim 4; It is characterized in that; The inboard said entity strengthening core (122) of said hole fusion portion (11) is provided with and merges the hole, and said fusion hole is the hole of axially running through one or more form of thread along said hold-down screw.
6. pattern of fusion internal fixation of spine screw according to claim 2 is characterized in that the crest of said form of thread portion (121) protrudes in the outer surface of said hole fusion portion (11).
7. pattern of fusion internal fixation of spine screw according to claim 1 is characterized in that said hole fusion portion (11) is multiwalled pore structure, and said pore structure comprises a plurality of holes that are interconnected.
8. pattern of fusion internal fixation of spine screw according to claim 7 is characterized in that the aperture of said pore structure is D, wherein, and 50 μ m≤D≤1200 μ m.
9. pattern of fusion internal fixation of spine screw according to claim 2; It is characterized in that; First end of said entity strengthening core (122) be connected with said head of a nail section (20) and its first end tapered, have the bone space of growing between said entity strengthening core (122) and the said form of thread portion (121).
10. pattern of fusion internal fixation of spine screw according to claim 2 is characterized in that, said form of thread portion (121) is wrapped in that said entity strengthening core (122) is gone up and is connected with said entity strengthening core (122) at the root of its tooth form.
11., it is characterized in that the whole or part on the surface of said synosteosis section (10) has hydroxyapatite coating layer according to each described pattern of fusion internal fixation of spine screw in the claim 1 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205345876U CN202458649U (en) | 2011-12-19 | 2011-12-19 | Fusion type screw capable of being fixed in spine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205345876U CN202458649U (en) | 2011-12-19 | 2011-12-19 | Fusion type screw capable of being fixed in spine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202458649U true CN202458649U (en) | 2012-10-03 |
Family
ID=46906857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205345876U Expired - Lifetime CN202458649U (en) | 2011-12-19 | 2011-12-19 | Fusion type screw capable of being fixed in spine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202458649U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102429716A (en) * | 2011-12-19 | 2012-05-02 | 北京爱康宜诚医疗器材股份有限公司 | Integrated-type internal set screw for vertebral column |
| CN104398297A (en) * | 2014-12-27 | 2015-03-11 | 山东威高骨科材料股份有限公司 | Pedicle screw |
| CN104887304A (en) * | 2015-05-05 | 2015-09-09 | 苏州瑞华医院有限公司 | Absorbable screw with lateral holes |
-
2011
- 2011-12-19 CN CN2011205345876U patent/CN202458649U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102429716A (en) * | 2011-12-19 | 2012-05-02 | 北京爱康宜诚医疗器材股份有限公司 | Integrated-type internal set screw for vertebral column |
| WO2013091392A1 (en) * | 2011-12-19 | 2013-06-27 | 北京爱康宜诚医疗器材股份有限公司 | Fusion type intraspinal fixing screw |
| CN104398297A (en) * | 2014-12-27 | 2015-03-11 | 山东威高骨科材料股份有限公司 | Pedicle screw |
| CN104887304A (en) * | 2015-05-05 | 2015-09-09 | 苏州瑞华医院有限公司 | Absorbable screw with lateral holes |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121003 |
|
| CX01 | Expiry of patent term |