CN201894668U - Absorbable rib intramedullary nail - Google Patents
Absorbable rib intramedullary nail Download PDFInfo
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- CN201894668U CN201894668U CN2010205471198U CN201020547119U CN201894668U CN 201894668 U CN201894668 U CN 201894668U CN 2010205471198 U CN2010205471198 U CN 2010205471198U CN 201020547119 U CN201020547119 U CN 201020547119U CN 201894668 U CN201894668 U CN 201894668U
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- rib
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- intramedullary pin
- rib intramedullary
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Abstract
The utility model discloses an absorbable rib intramedullary nail. The absorbable rib intramedullary nail is characterized in that the rib intramedullary nail is made of degradable and absorbable medical magnesium alloy and is in an arc shape with two tilting ends (1); anti-off barbs (2) are arranged on the surface of a nail body; the anti-off barbs (2) form a certain included angle with the nail body and close up towards the center of the nail body from the two sides of the nail body; and the two ends (1) of the nail body are in a cone-shaped blunt head structure. The absorbable rib intramedullary nail has plasticity and can form arbitrary shape according to the radian of a rib and can be degraded and absorbed in a human body, and the chest CT (Computed Tomography) and MRI (magnetic resonance imaging) examination are not influenced after absorption; moreover, the absorbable rib intramedullary nail has good tissue compatibility and does not need to be taken out by operation again.
Description
Technical field
The present invention relates to a kind of orthopaedic medical treatment and be suitable for utensil, particularly is a kind of rib intramedullary pin that absorbs.
Background technology
The internal fixation treatment fracture of rib of performing the operation in recent years reduces pulmonary complication and deformity because of helping lung expansion, the healing of rib anatomical reduction and patient's early ambulant, and functional rehabilitation is good, and effect has significantly obtained approving widely and promoting.At present, the surgical material that is applied to the fracture of rib internal fixation clinically mainly contains titanium alloy, memorial alloy and can absorb macromolecular material etc.Because the greatest differences between titanium alloy, memorial alloy elastic modelling quantity and cortical bone will make to have stress force shelter reaction between the two, it is slow to make bone strength reduce, heal; Implant is blocked situation in the influence observation lung when the X sheet is checked.These materials produce abrasive dust and because of corrosion produces poisonous ion, cause local anaphylaxis or inflammation because of the body internal friction simultaneously, reduce biocompatibility.In addition, these materials are the non-degradable material, after the tissue functional rehabilitation, need to take out by second operation, increase patient's misery and medical expense burden.Polylactic acid (PLA), polyglycolic acid (PGA) etc. can absorb the macromolecular material degradation speed and be difficult to control, and the catabolite hydrophilic is poor; The cell absorption affinity a little less than; Can cause that aseptic inflammation and sinus tract form, its initial mechanical performance can not satisfy fracture internal fixation needs, and mechanical strength is not enough simultaneously; Can cause the fibrosis of surrounding tissue and immunoreation etc., and product dependence on import at present, cost an arm and a leg.
The degradable magnesium alloy material has caused more and more scholars' concern as a kind of Metal Substrate biomaterial since 2000.Compare with other common metal base biomaterial, magnesium and magnesium alloy have following advantage: (1) magnesium is 25g in the intravital normal contents of people, and half is present in the skeleton.The density of magnesium and magnesium alloy is far below titanium alloy, and is approaching with people's bone density.(2) magnesium is the cation in the human body cell, and its content is only second to potassium, and magnesium participates in proteinic synthetic, can swash in vivo plurality of enzymes, regulates neuromuscular and central nervous system's activity, ensures myocardium normal contraction and thermoregulation.(3) standard electrode potential of magnesium is low, and corrodible degraded in containing the Human Physiology environment of chloride ion is absorbed degraded along with the self-healing of human body behind implant into body, need not second operation.(4) magnesium alloy has high specific strength and specific stiffness, Young's modulus is 41～45GPa, compare with other metal species implants commonly used, more near the elastic modelling quantity and the mechanical strength of nature bone cortex, such physical characteristic makes magnesium and alloy thereof can farthest avoid the stress force shelter reaction of embedded material in as internal fixation material repair of bone fractures process.Can provide stable mechanical property at the union of fracture initial stage, gradually rather than suddenly reduce its stress force shelter reaction, make fracture site bear the stress stimulation that progressively increases until physiological level, thereby accelerating union of bone fracture and moulding prevent the generation of local osteoporosis and refracture.
Because magnesium alloy has above-mentioned all features, it becomes the selection that can absorb internal fixation material in a kind of body with enough mechanical strengths, nontoxic, non-immunogenicity naturally.But because hydrogen that the magnesium alloy degradation speed is too fast and when degraded produces and high pH value have restricted the applied research of magnesium alloy as medical embedded material.By the alloying and the surface treatment of research material, effectively control the magnesium alloy degradation speed and give its surface with good biological activity, be one of focus content of magnesium alloy degradable embedded material research.Magnesium alloy AZ31B, its chemical constituent is: 2.50%～3.50% Al, 0.61%～1.40% Zn, 0.20%～1.0% Mn, Si≤0.10%, Fe≤0.005 %, Cu≤0.05%, Ni 0.005%, total impurities 0.30%, density is 1.8g/mm
3Metal institute of the Chinese Academy of Sciences has carried out from 2006 the intravital experiment of AZ31B magnesium alloy implantation rat.Studies show that it implants significantly degraded of 9 weeks beginning in rat bone tissue, reach the degraded peak during 3 to 6 months, and the new osteogenetic effect of promotion is arranged, during implanting, systems such as the circulation of rat body, immunity, urinary system are not had a negative impact.Their preliminary study prompting, magnesium alloy is not suitable for healing time long bone of limbs more of a specified duration and does fracture, but fracture of rib is lower to mechanical property requirements, healing time is fast, AZ31B magnesium alloy its cheap market price is bought conveniently simultaneously, is the ideal material of development fracture of rib internal fixation.
Simultaneously, existing rib intramedullary pin is to rely on striated area to prevent to get loose from medullary cavity, finds obviously to increase the bonding force between nail body and the medullary cavity during clinical use, anti-loose poor effect.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of rib intramedullary pin that absorbs is provided.
In order to address the above problem the technical solution of the utility model is such.
A kind of rib intramedullary pin that absorbs, it is characterized in that described rib intramedullary pin made by the medical magnesium alloy that degradable absorbs, described rib intramedullary pin is the arcuate structure of two ends perk, the nail surface is provided with the anticreep agnail, described anticreep agnail is in a certain angle with the nail body, drawn in to nail body center by both sides, described nail body two ends are the blunt nosed structure of taper.
Described medical magnesium alloy is: the alloy series that Mg-Ca series alloy, Mg-A1-Zn series alloy, Mg-Zn-Mn series alloy or magnesium rare earth metal alloy etc. are different a kind of or the polynary system magnesium alloy that is formed by these system combinations.
Differential arc oxidation Processing of Preparation one deck rete is adopted on described rib intramedullary pin surface, and described thicknesses of layers is 10～100 μ m, and described rete is the oxide ceramics rete.
Described anticreep agnail is located at nail body main shaft both sides.
Compared with prior art, the beneficial effects of the utility model are:
1, easy and simple to handle in the art, internal fixation is firm, simplifies operation technique.
2, enough mechanical strengths are arranged, can satisfy the required mechanics requirement of fracture internal fixation.
3, length shapes is easy to plastotype, is applicable to different parts fracture of rib needs.
4, raw material convenient sources is convenient to produce, and lowers production cost.
5, finished product is convenient to package sterilization, preservation.
6, can degrade gradually in vivo and finally absorb.
7, need not particular surgical instrument, existing operating theater instruments gets final product.
Description of drawings
Describe this utility model in detail below in conjunction with the drawings and specific embodiments.
Fig. 1 is a front view.
Fig. 2 is a vertical view.
Number in the figure is: 1-nail body end, 2-anticreep agnail.
The specific embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth this utility model.
As shown in Figure 1, 2, in the present embodiment, two ends of the present invention (1) perk makes the curved structure of whole nail body, is used for cooperating the radian of rib.The main shaft both sides are provided with 3～6 pairs of anticreep agnails (2), and anticreep agnail (2) is in a certain angle with the nail body, are drawn in to nail body center by both sides.Anticreep agnail (2) can increase the bonding force of nail body and medullary cavity.Two ends (1) are that taper is blunt nosed, both have been convenient to insert in the art, can prevent to scratch patient again, are particularly useful for the complete fracture of rib of medullary cavity.
It is shaft-like that the present invention follows closely body, and cross sectional shape can be circular or square.As shown in Figure 1, described anticreep agnail (2) is trapezoidal shape, and an end of broad is connected with the nail body.
The whole medical magnesium alloy of the degradable absorption that sale is arranged on the market that adopts of the present invention is made, as AZ31B, its chemical constituent is: 2.50%～3.50% Al, 0.61%～1.40% Zn, 0.20%～1.0% Mn, Si≤0.10%, Fe≤0.005 %, Cu≤0.05%, Ni0.005%, total impurities 0.30%, density are 1.8g/mm
3Adopt differential arc oxidation Processing of Preparation one deck rete in the nail surface, described thicknesses of layers is 10～100 μ m, and described rete is the oxide ceramics rete.Differential arc oxidation is a kind of technology at non-ferrous metal surface in situ grow oxide pottery.
Medical magnesium alloy material tool plasticity can be according to rib radian random molding, but and degradation in vivo absorb, absorb potruncus CT, MRI and check not have influence; Histocompatibility is good, the taking-up of need not performing the operation once more.The oxide ceramics rete on surface can delay absorption process in the body.
During use, the place makes a kerf in fracture of rib, cut successively and reach rib, after detecting the fracture of rib place, earlier according to the rib radian that intramedullary pin is moulding, each about 1.5 centimetres of fracture broken ends of fractured bone periosteum are pushed in the bone stripping open, retract fracture site with towel forceps and expose the art district, medullary cavity is inserted and can be absorbed the rib nail, and after the involutory fracture end that resets was satisfied, two ends absorbable thread ligation was reinforced and got final product.
More than show and described ultimate principle of the present invention, principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; that describes in the foregoing description and the description just illustrates principle of the present invention; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (3)
1. one kind can absorb the rib intramedullary pin, it is characterized in that described rib intramedullary pin made by the medical magnesium alloy that degradable absorbs, described rib intramedullary pin is the arcuate structure of two ends (1) perk, the nail surface is provided with anticreep agnail (2), described anticreep agnail (2) is in a certain angle with the nail body, drawn in to nail body center by both sides, described nail body two ends (1) are the blunt nosed structure of taper.
2. rib intramedullary pin according to claim 1 is characterized in that described rib intramedullary pin surface employing differential arc oxidation Processing of Preparation one deck rete, and described thicknesses of layers is 10-100 μ m, and described rete is the oxide ceramics rete.
3. rib intramedullary pin according to claim 1 is characterized in that described anticreep agnail (2) is located at nail body main shaft both sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205471198U CN201894668U (en) | 2010-09-29 | 2010-09-29 | Absorbable rib intramedullary nail |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205471198U CN201894668U (en) | 2010-09-29 | 2010-09-29 | Absorbable rib intramedullary nail |
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| CN201894668U true CN201894668U (en) | 2011-07-13 |
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| CN2010205471198U Expired - Fee Related CN201894668U (en) | 2010-09-29 | 2010-09-29 | Absorbable rib intramedullary nail |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101953709A (en) * | 2010-09-29 | 2011-01-26 | 上海交通大学医学院附属第三人民医院 | Absorbable rib intramedullary nail |
| CN103181817A (en) * | 2011-12-30 | 2013-07-03 | 北京爱康宜诚医疗器材股份有限公司 | Sacralization bone screw |
-
2010
- 2010-09-29 CN CN2010205471198U patent/CN201894668U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101953709A (en) * | 2010-09-29 | 2011-01-26 | 上海交通大学医学院附属第三人民医院 | Absorbable rib intramedullary nail |
| CN103181817A (en) * | 2011-12-30 | 2013-07-03 | 北京爱康宜诚医疗器材股份有限公司 | Sacralization bone screw |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110713 Termination date: 20130929 |