CN1126515C - Medical artificial nerve graft and preparation process thereof - Google Patents
Medical artificial nerve graft and preparation process thereof Download PDFInfo
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- CN1126515C CN1126515C CN01108208A CN01108208A CN1126515C CN 1126515 C CN1126515 C CN 1126515C CN 01108208 A CN01108208 A CN 01108208A CN 01108208 A CN01108208 A CN 01108208A CN 1126515 C CN1126515 C CN 1126515C
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- artificial nerve
- chitosan
- medical artificial
- nerve graft
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Abstract
The present invention discloses a medical artificial nerve implant and a preparation method thereof. The medical artificial nerve implant comprises a biologic catheter, and a fiber bracket is embedded into the biologic catheter. The preparation method comprises: chitosan or polyglycolic acid and polylactic acid are used for preparing the biologic catheter; the polyglycolic acid or the polylactic acid are used for preparing the fiber bracket; the fiber bracket is embedded into the biologic catheter. The medical artificial nerve implant prepared by the present invention is favorable for the growth of nerves, and the nerves are caused to have good recovery performance after being damaged. The preparation method is convenient and reliable.
Description
The present invention relates to a kind of graft that is used for the damaged nerve of bridge joint.
Peripheral nerve defection is a difficult problem of orthopaedics, microsurgery, the traumatology department, war-surgery's treatment, though modern microsurgical technique is highly accurate, but the functional rehabilitation rate after at present peripheral nerve injury is repaired is still unsatisfactory, and the breakthrough of basic research is placed in the hope that people will further improve the peripheral nerve rehabilitation outcome.Abroad the principal mode that polyglycolic acid (PGA), polylactic acid (PLA) and copolymer thereof are used in organizational project has fibrous framework, tubular structure etc.
The object of the present invention is to provide a kind of nerve growth that helps, make medical artificial nerve graft that recovers good after the nerve injury and preparation method thereof.
Technical solution of the present invention is:
A kind of medical artificial nerve graft comprises biological duct, and biological duct is embedded with fibrous framework.
The biological duct material is chitosan or polyglycolic acid, polylactic acid, and the fibrous framework material is polyglycolic acid or polylactic acid.Biological duct is the cystose pipe of polyglycolic acid or poly-lactic acid material.The medical artificial nerve graft diameter is 2.0～4.0mm.Medical artificial nerve graft length is 3.0～6.0cm.
A kind of preparation method of medical artificial nerve graft comprises the following steps:
1) prepares biological duct with chitosan or polyglycolic acid, polylactic acid;
2) prepare fibrous framework with polyglycolic acid or polylactic acid;
3) will be through 2) fibrous framework that makes embeds through 1) in the biological duct that makes.
The method of wherein making the chitosan biological duct is:
1) chitosan is dissolved in the acetum;
2) add glutaraldehyde and carry out cross-linking reaction;
3) add surfactant and carry out activation processing;
4) will pour die for molding into through the solution that above-mentioned steps obtains.
The concrete steps of step 1) are in the method for above-mentioned manufacturing chitosan biological duct: with deacetylation is that 80～85% chitosan is dissolved in 1～3% the acetum and dissolves; Step 2) concrete steps are: solution is warming up to 70～90 ℃, adds 0.5～3 times to the glutaraldehyde of chitosan amount, carried out cross-linking reaction 0.5～3 hour, be cooled to room temperature; The concrete steps of step 3) are: add be equivalent to 0.5～1.5 times of chitosan amount surfactant this 85 and be equivalent to the polysorbas20 of 0.5～1.5 times of chitosan amount, solution is fully stirred, leave standstill; The concrete steps of step 4) are: will pour die for molding into through the solution that above-mentioned steps obtains, and drying is removed volatile substances.
The method for preparing polyglycolic acid or polylactic acid cystose biological duct is: polyglycolic acid or polylactic acid are become tubular structure by conventional processing and forming earlier, be placed on then in 3～10MPa CO 2 high pressure gas, in polyglycolic acid or polylactic acid, dissolve saturated to carbon dioxide, again air pressure is descended, form foamed tubular structure.
The prepared medical artificial nerve graft of the present invention adopts chitosan, polyglycolic acid, poly-lactic acid material, be Biodegradable material, with human body excellent biological compatibility is arranged, there is not any untoward reaction, and its degradation speed is slower, for the reparation of nerve injury provides the adequate time assurance; Adopt PGA, PLA pipe and the bonded form of fibrous framework on the structure, make multiple tube have certain mechanical strength and toughness, for the growth of neurocyte provides unimpeded space, simultaneously for instructing the neurocyte ordering growth that necessary inducing action is provided; Tube wall adopts the cystose loose structure, is the conveying of nutrient substance required in the nerve growth process, and essential approach is provided, and nerve injury recovers.Preparation method of the present invention is convenient, reliable.
The invention will be further described below in conjunction with embodiment.
Embodiment 1:
1) use the Preparation of Chitosan biological duct: with deacetylation is that the chitosan of 80～85% (examples 80%, 28%, 85%) is dissolved in the acetum of 1～3% (example 1%, 2%, 3%) and dissolves, above-mentioned solution is warming up to 70～90 ℃ (70 ℃, 80 ℃, 90 ℃ of examples), add 0.5～3 times (0.5,1,2,3 times of example) in the glutaraldehyde of chitosan amount, carry out cross-linking reaction 0.5～3 hour (example 0.5,1,2,3 hour), be cooled to room temperature; Add again be equivalent to 0.5～1.5 times of chitosan amount (0.5,1,1.5 times of example) this 85 and be equivalent to the polysorbas20 of 0.5～1.5 times of chitosan amount (0.5,1,1.5 times of example), solution is fully stirred, leave standstill more than 24 hours; To pour (the molding among 2.0～4.0mm * 3.0cm～6cm), and drying is removed volatile substances of ready tubular die into through the solution that above-mentioned steps obtains.
2) with polyglycolic acid (PGA) preparation fibrous framework: the conventional method with prior art is processed into the fiber of 10～15 μ m by extrusion modling, and makes the support of difformity, different thicknesses.
3) will be through 2) fibrous framework that makes embeds through 1 with conventional micromanipulation method) in the biological duct that makes.
Embodiment 2:
Fibrous framework adopts polylactic acid (PLA) material, is processed into the fiber of 10～15 μ m with the conventional method of prior art by extrusion modling, and makes the support of difformity, different thicknesses.All the other are with embodiment 1.
Embodiment 3:
Adopt polyglycolic acid or polylactic acid to make the cystose biological duct: polyglycolic acid or polylactic acid are processed into tubular structure (2.0～4.0mm * 3.0cm～6cm) by the conventional method plastic shaping earlier, be placed on then in 3～10MPa (example 3,5,7,10MPa) CO 2 high pressure gas, in polyglycolic acid or polylactic acid, dissolve saturated to carbon dioxide, again air pressure is dropped to about an atmospheric pressure, the carbon dioxide dissolubility descends rapidly in the polymer, produce a large amount of air cavitys, finally form foamed tubular structure.All the other are all with embodiment 1.
Embodiment 4:
Fibrous framework adopts polylactic acid (PLA) material, is processed into the fiber of 10～15 μ m with the conventional method of prior art by extrusion modling, and makes the support of difformity, different thicknesses.All the other are with embodiment 3.
Claims (7)
1, a kind of medical artificial nerve graft is characterized in that: comprise the biological duct that chitosan material is made, biological duct is embedded with fibrous framework.
2, medical artificial nerve graft according to claim 1 is characterized in that: the fibrous framework material is polyglycolic acid or polylactic acid.
3, medical artificial nerve graft according to claim 1 and 2 is characterized in that: the medical artificial nerve graft diameter is 2.0～4.0mm.
4, medical artificial nerve graft according to claim 1 and 2 is characterized in that: medical artificial nerve graft length is 3.0～6.0cm.
5, a kind of preparation method of medical artificial nerve graft is characterized in that: comprise the following steps:
1) uses the Preparation of Chitosan biological duct;
2) prepare fibrous framework with polyglycolic acid or polylactic acid;
3) will be through 2) fibrous framework that makes embeds through 1) in the biological duct that makes.
6, the preparation method of medical artificial nerve graft according to claim 5 is characterized in that: the method for making the chitosan biological duct is:
1) chitosan is dissolved in the acetum;
2) add two valerals and carry out cross-linking reaction;
3) add surfactant and carry out activation processing;
4) will pour die for molding into through the solution that above-mentioned steps obtains.
7, the preparation method of medical artificial nerve graft according to claim 6 is characterized in that: the concrete steps of step 1) are: with deacetylation is that 80～85% chitosan is dissolved in 1～3% the acetum and dissolves; Step 2) concrete steps are: solution is warming up to 70～90 ℃, adds 0.5～3 times to two valerals of chitosan amount, carried out cross-linking reaction 0.5～3 hour, be cooled to room temperature; The concrete steps of step 3) are: add be equivalent to 0.5～1.5 times of chitosan amount surfactant this 85 and be equivalent to the polysorbas20 of 0.5～1.5 times of chitosan amount, solution is fully stirred, leave standstill; The concrete steps of step 4) are: will pour die for molding into through the solution that above-mentioned steps obtains, and drying is removed volatile substances.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN01108208A CN1126515C (en) | 2001-02-19 | 2001-02-19 | Medical artificial nerve graft and preparation process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN01108208A CN1126515C (en) | 2001-02-19 | 2001-02-19 | Medical artificial nerve graft and preparation process thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1319379A CN1319379A (en) | 2001-10-31 |
| CN1126515C true CN1126515C (en) | 2003-11-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN01108208A Expired - Lifetime CN1126515C (en) | 2001-02-19 | 2001-02-19 | Medical artificial nerve graft and preparation process thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN1126515C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1298298C (en) * | 2004-05-14 | 2007-02-07 | 清华大学 | Preparation method of chitosan tubular bracket |
| CN100355405C (en) * | 2004-06-24 | 2007-12-19 | 同济大学 | Production of porous stand for tissue engineering |
| CN100388911C (en) * | 2005-09-09 | 2008-05-21 | 南方医科大学 | Preparation process and use of birds calamus made artificial nerve bridge connection tube |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100382772C (en) * | 2005-09-28 | 2008-04-23 | 南通大学 | Medical nerve transplant containing silk element and preparing method |
| CN100358589C (en) * | 2006-04-28 | 2008-01-02 | 武汉理工大学 | Tubular type material for rehabilitating human peripheral nerve defection and its preparation method |
| CN101732760A (en) * | 2009-12-31 | 2010-06-16 | 扬州大学 | Chitosan non-vessel stent and preparation method thereof |
| CN102526811B (en) * | 2010-12-16 | 2013-10-09 | 上海其胜生物制剂有限公司 | Preparation method and application of degradable carboxymethyl chitosan composite nerve conduit |
| CN102908207B (en) * | 2012-10-30 | 2015-04-22 | 南通大学 | Tissue engineering nerve graft prepared by biological printing technology and preparation method thereof |
| CN103230623A (en) * | 2013-05-10 | 2013-08-07 | 南通大学 | Method for in-vitro construction of tissue engineered nerves |
| CN104623738B (en) * | 2015-01-12 | 2016-08-24 | 南通大学 | Tissue engineering nerve graft with suspension fibrous framework and preparation method thereof |
| CN106729980B (en) * | 2016-12-30 | 2019-11-12 | 清华大学 | A kind of bionical nerve graft and preparation method thereof for peripheral nerve reparation |
-
2001
- 2001-02-19 CN CN01108208A patent/CN1126515C/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1298298C (en) * | 2004-05-14 | 2007-02-07 | 清华大学 | Preparation method of chitosan tubular bracket |
| CN100355405C (en) * | 2004-06-24 | 2007-12-19 | 同济大学 | Production of porous stand for tissue engineering |
| CN100388911C (en) * | 2005-09-09 | 2008-05-21 | 南方医科大学 | Preparation process and use of birds calamus made artificial nerve bridge connection tube |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1319379A (en) | 2001-10-31 |
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Owner name: NANTONG UNIVERSITY Free format text: FORMER OWNER: NANTONG MEDICAL COLLEGE Effective date: 20060825 |
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Effective date of registration: 20060825 Address after: 226007 No. 40, youth East Road, Jiangsu, Nantong Patentee after: Nantong University Address before: 226001 Jiangsu province Nantong Qixiu Road No. 17 Patentee before: Nantong Medical College |
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