CN101953709A - Absorbable rib intramedullary nail - Google Patents
Absorbable rib intramedullary nail Download PDFInfo
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- CN101953709A CN101953709A CN 201010295848 CN201010295848A CN101953709A CN 101953709 A CN101953709 A CN 101953709A CN 201010295848 CN201010295848 CN 201010295848 CN 201010295848 A CN201010295848 A CN 201010295848A CN 101953709 A CN101953709 A CN 101953709A
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- rib
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- intramedullary pin
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- nail body
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Abstract
The invention relates to an absorbable rib intramedullary nail which is characterized by being made of degradable and absorbable medical magnesium alloy, the rib intramedullary nail is in an arc structure with both ends (1) tilting up, the surface of a nail body is provided with a falling-preventing barb (2), the falling-preventing barb (2) forms a certain included angle with the nail body and tucks up from two sides to the center of the nail body, and both ends (1) of the nail body are in taper blunt head structures. The rib intramedullary nail has plasticity, can be freely formed according to the radian of a rib and can be degraded and absorbed in human bodies, and CT (Computed Tomography) and MRI (Magnetic Resonance Imaging) detection on chest can not be influenced after the absorbable rib intramedullary nail is absorbed. The rib intramedullary nail has good histocompatibility and does not need to be taken out by another operation.
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 technical scheme of the present invention 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 invention has the beneficial effects as follows:
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 the present invention 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 the present invention.
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 (4)
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 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.
3. 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.
4. rib intramedullary pin according to claim 1 is characterized in that described anticreep agnail (2) is located at nail body main shaft both sides.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010295848 CN101953709A (en) | 2010-09-29 | 2010-09-29 | Absorbable rib intramedullary nail |
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| CN 201010295848 CN101953709A (en) | 2010-09-29 | 2010-09-29 | Absorbable rib intramedullary nail |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102181759A (en) * | 2011-04-13 | 2011-09-14 | 中国科学院上海微系统与信息技术研究所 | Aluminum alloy suitable for intravascular stent |
| CN105832392A (en) * | 2015-01-13 | 2016-08-10 | 上海市同济医院 | Degradable shape memory rib internal fixing body |
| CN106618703A (en) * | 2017-01-05 | 2017-05-10 | 山东大学 | Beta titanium alloy falling-off-proof nail for sagittal condylar fracture and using method of beta titanium alloy falling-off-proof nail |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1057398A (en) * | 1996-08-15 | 1998-03-03 | Mitsuru Monma | Turn preventive device for operation of femur and humerus fracture |
| US6575973B1 (en) * | 2000-10-26 | 2003-06-10 | Safedrip Ltd. | Self locking intramedullary nail |
| WO2005094706A1 (en) * | 2004-03-31 | 2005-10-13 | Orthofix S.R.L. | Intramedullary nail comprising elements of shape-memory material |
| CN201064479Y (en) * | 2007-08-09 | 2008-05-28 | 王平山 | Anatomy type caput radius intramedullary nail with lock |
| CN101264339A (en) * | 2007-03-14 | 2008-09-17 | 北京奥精医药科技有限公司 | Magnesium alloy bone surgery internal fixation and implantation material |
| CN201894668U (en) * | 2010-09-29 | 2011-07-13 | 上海交通大学医学院附属第三人民医院 | Absorbable rib intramedullary nail |
-
2010
- 2010-09-29 CN CN 201010295848 patent/CN101953709A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1057398A (en) * | 1996-08-15 | 1998-03-03 | Mitsuru Monma | Turn preventive device for operation of femur and humerus fracture |
| US6575973B1 (en) * | 2000-10-26 | 2003-06-10 | Safedrip Ltd. | Self locking intramedullary nail |
| WO2005094706A1 (en) * | 2004-03-31 | 2005-10-13 | Orthofix S.R.L. | Intramedullary nail comprising elements of shape-memory material |
| CN101264339A (en) * | 2007-03-14 | 2008-09-17 | 北京奥精医药科技有限公司 | Magnesium alloy bone surgery internal fixation and implantation material |
| CN201064479Y (en) * | 2007-08-09 | 2008-05-28 | 王平山 | Anatomy type caput radius intramedullary nail with lock |
| CN201894668U (en) * | 2010-09-29 | 2011-07-13 | 上海交通大学医学院附属第三人民医院 | Absorbable rib intramedullary nail |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102181759A (en) * | 2011-04-13 | 2011-09-14 | 中国科学院上海微系统与信息技术研究所 | Aluminum alloy suitable for intravascular stent |
| CN105832392A (en) * | 2015-01-13 | 2016-08-10 | 上海市同济医院 | Degradable shape memory rib internal fixing body |
| CN106618703A (en) * | 2017-01-05 | 2017-05-10 | 山东大学 | Beta titanium alloy falling-off-proof nail for sagittal condylar fracture and using method of beta titanium alloy falling-off-proof nail |
| CN106618703B (en) * | 2017-01-05 | 2023-10-17 | 山东大学 | Beta titanium alloy anti-drop bone nail for condyle sagittal fracture and use method thereof |
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Application publication date: 20110126 |