RO115694B1 - Bioartifcial material for implants - Google Patents

Bioartifcial material for implants Download PDF

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Publication number
RO115694B1
RO115694B1 RO9700726A RO9700726A RO115694B1 RO 115694 B1 RO115694 B1 RO 115694B1 RO 9700726 A RO9700726 A RO 9700726A RO 9700726 A RO9700726 A RO 9700726A RO 115694 B1 RO115694 B1 RO 115694B1
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RO
Romania
Prior art keywords
calcium
acid
kda
average molecular
acrylate
Prior art date
Application number
RO9700726A
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Romanian (ro)
Inventor
Maria Caloianu
Mircea Dan Bucevschi
Monica Colt
Catalin Iordachel
Radu Iordachel
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Inst National De Cercetare Dez
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Application filed by Inst National De Cercetare Dez filed Critical Inst National De Cercetare Dez
Priority to RO9700726A priority Critical patent/RO115694B1/en
Publication of RO115694B1 publication Critical patent/RO115694B1/en

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Abstract

The invention relates to a bioartificial material for implants as a tridimensionally configurated polymeric composite comprising 1525% soluble collagen having an average molecular weight of 300 kDa, 5070% anionic copolymer having the general formula (A-B)n, the chemical composition A:B=50:5095:5 and an average molecular weight of 20100 kDa, where A is a polymerisable monomer with free carboxylic groups, selected among acrylic acid, metacrylic acid, maleic acid and itaconic acid, and B a vinylic monomer selected among methyl acrylate, methyl metacrylate, butyl acrylate, ethyl acrylate, 2-hydroxy methylmethacrylate, vinyl acetate, styrene, ethylene or propylene, 510% chondroitin sulphate and the remainder to 100% water-insoluble calcium and calcium atoms from soluble salts selected among calcium chloride, calcium lactate, calcium phosphate or calcium gluconate, the percent being expressed by weight

Description

Invenția pentru implant se referă la un material bioartificial pentru implant pe bază de colagen și polianioni sintetici intercuplat cu calciu care este destinat tratamentelor afecțiunilor cu deficit de calciu sub formă de implanturi.The invention for the implant relates to a bioartificial material for implant based on collagen and synthetic polyanions interspersed with calcium which is intended for the treatment of calcium deficiency disorders in the form of implants.

Se cunoaște o compoziție de material bioartificial pe bază de colagen, glicozaminoglican, factor de creștere, copolimer stiren anhidridă - maleică.A composition of bioartificial material based on collagen, glycosaminoglycan, growth factor, styrene anhydride-maleic copolymer is known.

Materialul bioarticifial pentru implant, conform invenției, este un compozit polimeric cu configurație tridimensională, constituit din 15...25% colagen solubil, cu masa moleculară medie de 300 kDa, 50...70% copolimer anionic cu formula generală (A-B)n, de compoziție chimică A:B = 50:50...95: 5 și cu masa moleculară medie de 20...100 kDa, în care A este un monomer polimerizabil cu grupări carboxilice libere ales între acid acrilic, acid metacrilic, acid maleic sau acid itaconic, iar B un monomer vinilic ales dintre acrilat de metil, metacrilat de metil, acrilat de butii, acrilat de etil, 2-hidroxi metilmetacrilat, acetat de vinii, stiren, etilenă sau propilenă, 5...10% condroitin sulfat și până la 100% calciu insolubil în apă și atomi de calciu proveniți din săruri solubile alese dintre clorură de calciu, lactat de calciu, fosfat de calciu sau gluconat de calciu, procentele fiind exprimate în greutate.The bio-artificial material for the implant, according to the invention, is a polymeric composite with three-dimensional configuration, consisting of 15 ... 25% soluble collagen, with an average molecular mass of 300 kDa, 50 ... 70% anionic copolymer of general formula (AB) n , of chemical composition A: B = 50:50 ... 95: 5 and with an average molecular weight of 20 ... 100 kDa, wherein A is a polymerizable monomer with free carboxylic groups chosen from acrylic acid, methacrylic acid, acid maleic or itaconic acid, and B a vinyl monomer selected from methyl acrylate, methyl methacrylate, butyl acrylate, ethyl acrylate, 2-hydroxy methylmethacrylate, vinyl acetate, styrene, ethylene or propylene, 5 ... 10% chondroitin sulphate and up to 100% water-insoluble calcium and calcium atoms from soluble salts chosen from calcium chloride, calcium lactate, calcium phosphate or calcium gluconate, the percentages being expressed by weight.

Aplicarea invenției are următoarele avantaje:Application of the invention has the following advantages:

- materialul bioartificial se poate utiliza sub formă de gel sau în stare solidă;- the bioartificial material can be used in gel form or in solid state;

- conține calciu legat chimic și difuzibil în proporții variabile asigurând retardarea, atât prin mecanism difuzional, cât și prin erodare enzimatică;- contains calcium bound and chemically diffusible in variable proportions ensuring retardation, both by diffusion mechanism and by enzymatic erosion;

- gelul se poate profila prin matrițare în vederea obținerii de biomateriale solide cu geometrie complexă, ca înlocuitori de țesuturi conjunctive rigide sau flexibile;- the gel can be profiled by molding in order to obtain solid biomaterials with complex geometry, as substitutes for rigid or flexible connective tissues;

- este biocompatibil, neresorbabil sau resorbabil.în funcție de necesități;- it is biocompatible, non-absorbable or resorbable. depending on needs;

- tehnologia de obținere este simplă și nu necesită temperaturi ridicate.- The technology is simple and does not require high temperatures.

In continuare, se dau două exemple de realizare a invenției.The following are two examples of embodiments of the invention.

Exemplul 1. Intr-un vas de amestecare de 5 I, prevăzut cu agitator se introduc 2 I de soluție apoasă, cu pH = 8, de copolimer de acid acrilic și metacrilat de metil ce conține 60% acid acrilic, cu masa moleculară medie de 100 kDa, de concentrație 2%, 0,8 I de soluție de colagen de concentrație 2% și pH = 0,5 I de soluție de condroitin sulfat A cu pH = 8 și concentrație 0,5% și un litru de soluție de clorură de calciu de concentrație 1%. După 2 h de agitare moderată la temperatura, de 40°C gelul opac format se separă prin decantare și se usucă, la 60°C la vid. Se obțin 62,2 g de material bioartificial solid ce conține 9,6% calciu legat și 4,8% calciu difuzibil.Example 1. In a mixing vessel of 5 L, provided with a stirrer, add 2 L of aqueous solution, with pH = 8, of copolymer of acrylic acid and methyl methacrylate containing 60% acrylic acid, with average molecular weight of 100 kDa, 2% concentration, 0.8 I collagen solution 2% and pH = 0.5 I chondroitin sulfate solution A with pH = 8 and 0.5% concentration and one liter chloride solution calcium concentration 1%. After 2 hours of moderate stirring at 40 ° C, the opaque gel formed is separated by decantation and dried at 60 ° C under vacuum. 62.2 g of solid bioartificial material containing 9.6% bound calcium and 4.8% diffusible calcium are obtained.

Exemplul 2. Același procedeu ca la exemplul 1, cu deosebirea că se folosește copolimer de stiren și acid maleic cu masa moleculară medie de 20 kDa și lactat de calciu. Se obțin 70,3 g de material bioarticial solid ce conține 7,6% calciu legat și 6,1% calciu difuzibil.Example 2. The same procedure as in Example 1, except that styrene and maleic acid copolymer with average molecular weight of 20 kDa and calcium lactate are used. 70.3 g of solid bioarticial material containing 7.6% bound calcium and 6.1% diffusible calcium are obtained.

Claims (1)

RevendicareClaim Material bioartificial pentru implant, caracterizat prin aceea că este un compozit polimeric cu configurație tridimensională, constituit din 15...25% colagen solubil, cu masa moleculară medie de 300 kDa, 50...70% copolimer anionic cu formula generală (A-BJn, de compoziție chimică A:B = 50:50...95: 5 și cu masa moleculară medie deBioartificial material for implant, characterized in that it is a polymeric composite with three-dimensional configuration, consisting of 15 ... 25% soluble collagen, with an average molecular mass of 300 kDa, 50 ... 70% anionic copolymer of the general formula (A- BJ n , of chemical composition A: B = 50:50 ... 95: 5 and with average molecular mass of 20...100 kDa, în care A este un monomer polimerizabil cu grupări carboxilice libere ales dintre acid acrilic, acid metacrilic, acid maleic sau acid itaconic, iar B un monomer vinilic20 ... 100 kDa, wherein A is a polymerizable monomer with free carboxylic groups selected from acrylic acid, methacrylic acid, maleic acid or itaconic acid, and B a vinyl monomer. RO 115694 Bl ales între acrilat de metil, metacrilat de metil, acrilat de butii, acrilat de etil, 2-hidroxi metil metacrilat, acetat de vinii, stiren, etilenă sau propilenă, 5...10% condroitin sulfat și până la 100% calciu insolubil în apă și atomi de calciu proveniți din săruri solubile alese dintre clorură de calciu, lactat de calciu, fosfat de calciu sau gluconat de calciu, 50 procentele fiind exprimate în greutate.EN 115694 Bl chosen from methyl acrylate, methyl methacrylate, butyl acrylate, ethyl acrylate, 2-hydroxy methyl methacrylate, vinyl acetate, styrene, ethylene or propylene, 5 ... 10% chondroitin sulfate and up to 100% water-insoluble calcium and calcium atoms from soluble salts chosen from calcium chloride, calcium lactate, calcium phosphate or calcium gluconate, 50 percent by weight.
RO9700726A 1997-04-15 1997-04-15 Bioartifcial material for implants RO115694B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RO9700726A RO115694B1 (en) 1997-04-15 1997-04-15 Bioartifcial material for implants

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RO9700726A RO115694B1 (en) 1997-04-15 1997-04-15 Bioartifcial material for implants

Publications (1)

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RO115694B1 true RO115694B1 (en) 2000-05-30

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RO9700726A RO115694B1 (en) 1997-04-15 1997-04-15 Bioartifcial material for implants

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RO (1) RO115694B1 (en)

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