CN204636515U - A kind of Absorbable rod self-locking hold-down bars - Google Patents
A kind of Absorbable rod self-locking hold-down bars Download PDFInfo
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- CN204636515U CN204636515U CN201520268399.1U CN201520268399U CN204636515U CN 204636515 U CN204636515 U CN 204636515U CN 201520268399 U CN201520268399 U CN 201520268399U CN 204636515 U CN204636515 U CN 204636515U
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- Prior art keywords
- down bars
- hold
- main body
- agnail
- tip
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Abstract
The utility model discloses a kind of Absorbable rod self-locking hold-down bars, comprise hold-down bars main body, wherein, the head of hold-down bars main body is provided with tip, and this tip is elliptical cone structure, and hold-down bars main body is cylindroid structure, the bottom of this hold-down bars main body is provided with agnail, the root of agnail is connected with described hold-down bars main body, and its tip is towards the afterbody of described hold-down bars main body, and main body, tip and agnail are made by Poly-L-lactic acid resin.The utility model has the advantage of: structure is simple, and self-locking performance is good, and takes out without the need to second operation.
Description
Technical field
This utility model relates to implantable medical equipment technical field, especially a kind of Absorbable rod self-locking hold-down bars, refers in particular to a kind of Absorbable rod self-locking hold-down bars for the internal fixtion of fracturing and cartilage tissue damage in a kind of bone surgery.
Background technology
In recent years, along with the fast development of physical culture industry and communications, sudden hurt accident increases year by year, and the orthopaedics sufferers such as fracture and cartilage injury are especially common.Clinically the basic principle of orthopaedics therapy for resetting, fixing, early functional exercise, wherein fixedly comprise extenal fixation and internal fixtion.The internal fixtion of usual indication be after open reduction with the inside-fixture had no adverse reaction to tissue, damage section is fixed, thus reaches and reset and fixing requirement.No matter more satisfactory in rigidity, intensity, biocompatibility metal material is, but due to stress force shelter reaction, metal corrosion, again need perform the operation and take out the waste that the defect such as inside-fixture causes manpower and materials, extra economy, physiology and psychological burden can be caused to patient.
Use the shortcoming of metal internal fixation material during in order to overcome fracture, play this domain expert the sixties in 20th century and to begin one's study absorbable orthopaedics internal fixation material, i.e. biodegradation material, it is in vivo through hydrolysis, oxidation reaction, and end product is CO
2and H
2o, is excreted by respiratory system or urinary system, does not accumulate in vivo, does not also need taking-up of again performing the operation.Current production and the Absorbable rod orthopaedics inside-fixture applying all comparative maturities have bioabsorbable interference screw, adsorbable bone rod, absorbable-bone plate etc., but from clinical trial in recent years, purposes far-ranging adsorbable bone rod limited strength, once exposed and occurs getting loose with osseous tissue at implant site adsorbable bone rod and form the case that joint bodies needs second operation to take out.Therefore, intensity and the stability after implanting become the important indicator weighing Absorbable internalfixator performance.
Summary of the invention
Technical problem to be solved in the utility model is the present situation for prior art, and provide structure simple, self-locking performance is good, and without the need to a kind of Absorbable rod self-locking hold-down bars that second operation takes out.
This utility model solves the problems of the technologies described above adopted technical scheme:
A kind of Absorbable rod self-locking hold-down bars, comprise hold-down bars main body, wherein, the head of hold-down bars main body is provided with tip, and this tip is elliptical cone structure, and hold-down bars main body is cylindroid structure, the bottom of this hold-down bars main body is provided with agnail, the root of agnail is connected with described hold-down bars main body, and its tip is towards the afterbody of described hold-down bars main body, and main body, tip and agnail are made by Poly-L-lactic acid resin.
The technical measures optimized also comprise:
The major axis in the cross section of above-mentioned hold-down bars main body cylindroid structure is 3mm to 5.5mm, and the eccentricity in its cross section is 0.08 to 0.28; The length of hold-down bars main body is 30mm to 70mm.
The summit of above-mentioned tip is arranged on the axis of described hold-down bars main body.
The height of above-mentioned tip is 8% to 12% of the height of described hold-down bars main body.
Angle between the outer surface of above-mentioned agnail and described hold-down bars main body is 30 ° to 45 °.
Above-mentioned agnail is four column distributions, and often the number of the upper agnail of row is 5 to 8; Four row agnails with the macropinacoid of the oval cross section of described hold-down bars main body and brchypinacoid for the plane of symmetry is symmetrical.
The coning angle of above-mentioned agnail is 15 ° to 30 °.
Distance between above-mentioned agnail is 1.5mm to 4mm, and the height of agnail is 1.5mm to 2.8mm.
The utility model has the advantage of:
1, a kind of Absorbable rod self-locking hold-down bars of the present utility model, adopt medical macromolecular materials Poly-L-lactic acid resin as raw material, be shaped through Solid state extrusion, overcome metal internal fixation system easy-to-rust, cause the drawback of chronic inflammatory disease, to implant behind affected part can gradually by Stress Transfer to bone, thus eliminate stress-shielding effect, and decrease osteoporotic danger.In addition, adopt Poly-L-lactic acid resin as raw material, do not disturb nuclear magnetic resonance image inspection, reduce and use the X-ray examination time, decrease the dosage that operator and operation receiveing person absorb lonizing radiation.
2, after a kind of Absorbable rod self-locking hold-down bars of the present utility model implants affected part, along with the prolongation of time and the increase of cartilaginous tissue intensity, water and carbon dioxide can be hydrolyzed in tissue, excrete with other metabolism products of human body, greatly reduce the risk producing long-term complications.Take out operation without the need to secondary implants, decrease the risk of infection, greatly alleviate financial burden and the psychology of patient, physiology is painful, decreases the spending of hospital side man power and material.
3, a kind of Absorbable rod self-locking of this utility model hold-down bars, head design is the tip of elliptical cone structure, and polarization is strong, and simple to operate, easily grasp, it is convenient to implant, and does not need too large moment of torsion.
4, a kind of Absorbable rod self-locking hold-down bars of the present utility model, there is the characteristic of lateral expansion, its ellipsoidal cross section, because major axis is limited, expand along brchypinacoid, size changes, auto-lock function is formed in conjunction with barb structure, enough shearings and twisting resistance can be born, ensure that nail and the combination of bone can not loosen, slippage and rotation, more firm stable.
5, a kind of Absorbable rod self-locking hold-down bars of utility model, main body is the Elliptic Cylinder that eccentricity is less, both larger frictional force can have been produced to keep fixed, and be designed to vascularization, blood flow and the interstitial fluid of cross section ellipse provide enough spaces, greatly reduce outer periosteum and blood fortune destructiveness, thus effective healing of bone can be ensured.
6, a kind of Absorbable rod self-locking hold-down bars of the present utility model, has the elasticity with binding site equivalent, and compared with Metallic orthopaedic implants, its bending strength, elastic modelling quantity and people's bone closely, can not affect the small activity of bone, accelerates the postoperative rehabilitation of patient.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is A portion enlarged drawing in Fig. 1;
Fig. 3 is the sectional view of Fig. 1.
Detailed description of the invention
Below in conjunction with accompanying drawing embodiment, this utility model is described in further detail.
Be structural representation of the present utility model as shown in Figure 1 to Figure 3,
Reference numeral is wherein: hold-down bars main body 1, tip 2, agnail 3.
As shown in Figure 1 to Figure 3,
A kind of Absorbable rod self-locking hold-down bars, comprise hold-down bars main body 1, wherein, the head of hold-down bars main body 1 is provided with tip 2, and this tip 2 is in elliptical cone structure, and hold-down bars main body 1 is in cylindroid structure, the bottom of this hold-down bars main body 1 is provided with agnail 3, the root of agnail 3 is connected with described hold-down bars main body 1, and its tip is towards the afterbody of described hold-down bars main body 1, and main body 1, tip 2 and agnail 3 are made by Poly-L-lactic acid resin.
The hold-down bars main body 1 of this kind of Absorbable rod self-locking hold-down bars adopts cylindroid structure, and tip 2 adopts suitable elliptical cone structure; The design of elliptic cross-section, both can produce larger frictional force to keep fixed, again for vascularization, blood flow and interstitial fluid provide enough spaces, greatly reduced outer periosteum and blood fortune destructiveness, thus can ensure effective healing of bone.
It adopts Poly-L-lactic acid resin as raw material, Poly-L-lactic acid resin is hydrolyzed into water and carbon dioxide in vivo, excrete with other metabolism products of human body, greatly reduce the risk producing long-term complications, and take out operation without the need to secondary implants, decrease risk and the operation expenditure of infection.
In embodiment, the major axis in the cross section of hold-down bars main body 1 cylindroid structure is 3mm to 5.5mm, and the eccentricity in its cross section is 0.08 to 0.28; The length of hold-down bars main body 1 is 30mm to 70mm.
In embodiment, the summit of tip 2 is arranged on the axis of described hold-down bars main body 1.
In embodiment, the height of tip 2 is 8% to 12% of the height of described hold-down bars main body 1.
In embodiment, the angle between the outer surface of agnail 3 and described hold-down bars main body 1 is 30 ° to 45 °.
In embodiment, agnail 3 is in four column distributions, and often the number of the upper agnail 3 of row is 5 to 8; Four row agnails 3 with the macropinacoid of the oval cross section of described hold-down bars main body 1 and brchypinacoid for the plane of symmetry is symmetrical.
Agnail 3 arranges (Fig. 3) near brchypinacoid, and the two row agnails 3 being positioned at macropinacoid homonymy are crisscross arranged (Fig. 2), can play self-locking fixation better like this.
In embodiment, the coning angle of agnail 3 is 15 ° to 30 °.
In embodiment, the distance between agnail 3 is 1.5mm to 4mm, and the height of agnail 3 is 1.5mm to 2.8mm.
Most preferred embodiment of the present utility model is illustrated, and the various change made by those of ordinary skill in the art or remodeling all can not depart from scope of the present utility model.
Claims (8)
1. an Absorbable rod self-locking hold-down bars, comprise hold-down bars main body (1), it is characterized in that: the head of described hold-down bars main body (1) is provided with tip (2), this tip (2) is in elliptical cone structure, described hold-down bars main body (1) is in cylindroid structure, the bottom of this hold-down bars main body (1) is provided with agnail (3), the root of described agnail (3) is connected with described hold-down bars main body (1), its tip is towards the afterbody of described hold-down bars main body (1), described main body (1), tip (2) and agnail (3) are made by Poly-L-lactic acid resin.
2. a kind of Absorbable rod self-locking hold-down bars according to claim 1, it is characterized in that: the major axis in the cross section of described hold-down bars main body (1) cylindroid structure is 3mm to 5.5mm, the eccentricity in its cross section is 0.08 to 0.28; The length of described hold-down bars main body (1) is 30mm to 70mm.
3. a kind of Absorbable rod self-locking hold-down bars according to claim 2, is characterized in that: the summit of described tip (2) is arranged on the axis of described hold-down bars main body (1).
4. a kind of Absorbable rod self-locking hold-down bars according to claim 3, is characterized in that: the height of described tip (2) is 8% to 12% of the height of described hold-down bars main body (1).
5. a kind of Absorbable rod self-locking hold-down bars according to claim 4, is characterized in that: the angle between described agnail (3) and the outer surface of described hold-down bars main body (1) is 30 ° to 45 °.
6. a kind of Absorbable rod self-locking hold-down bars according to claim 5, is characterized in that: described agnail (3) is in four column distributions, and often the number of the upper agnail (3) of row is 5 to 8; Four row agnails (3) are that the plane of symmetry is symmetrical with the macropinacoid of the oval cross section of described hold-down bars main body (1) and brchypinacoid.
7. a kind of Absorbable rod self-locking hold-down bars according to claim 6, is characterized in that: the coning angle of described agnail (3) is 15 ° to 30 °.
8. a kind of Absorbable rod self-locking hold-down bars according to claim 7, it is characterized in that: the distance between described agnail (3) is 1.5mm to 4mm, the height of described agnail (3) is 1.5mm to 2.8mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520268399.1U CN204636515U (en) | 2015-04-29 | 2015-04-29 | A kind of Absorbable rod self-locking hold-down bars |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520268399.1U CN204636515U (en) | 2015-04-29 | 2015-04-29 | A kind of Absorbable rod self-locking hold-down bars |
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| Publication Number | Publication Date |
|---|---|
| CN204636515U true CN204636515U (en) | 2015-09-16 |
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|---|---|---|---|
| CN201520268399.1U Expired - Fee Related CN204636515U (en) | 2015-04-29 | 2015-04-29 | A kind of Absorbable rod self-locking hold-down bars |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104783878A (en) * | 2015-04-29 | 2015-07-22 | 浙江博硕倍生物科技有限公司 | Absorbable self-locking fixing bar and preparing method thereof |
-
2015
- 2015-04-29 CN CN201520268399.1U patent/CN204636515U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104783878A (en) * | 2015-04-29 | 2015-07-22 | 浙江博硕倍生物科技有限公司 | Absorbable self-locking fixing bar and preparing method thereof |
| CN104783878B (en) * | 2015-04-29 | 2016-10-12 | 天津博硕倍生物科技有限公司 | Absorbable self-locking hold-down bars and preparation method thereof |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 300401 Tianjin city Wuqing District Chen Zui town Mei Shi Road No. 486 Patentee after: Tianjin Boshuobei Biological Technology Co.,Ltd. Address before: Yinzhou District Zhonggongmiao Street copper basin Zha Cun 315192 Zhejiang province Ningbo city Zhejiang Boshuo times Biotechnology Co. Ltd. Patentee before: Zhejiang Boshuobei Biological Technology Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150916 |
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| CF01 | Termination of patent right due to non-payment of annual fee |