Injectable in situ self-forming mineral-polymer hybrid composition and uses thereof
First Claim
1. An in situ self-forming mineral-polymer hybrid composition comprising:
- a) a water-based and thermo-gelling liquid component comprising at least one hydrosoluble cationic polymer, one organic mono-phosphate source, and optionally one water-soluble organic mono-sulfonate, mono-sulfate or mono-carboxylate source;
said liquid component having a pH between 6.5 and 7.4; and
b) a water non-soluble solid component comprising at least one of calcium, fluoride, strontium, carbonate and phosphate salts, said solid component having a particle size ranging from 5 to 1000 micrometers,wherein said composition contains 50% weight to volume or less of the solid component and said liquid component and solid component are admixed together intimately to form a non-hardening thermo-gelling hybrid composition;
said hybrid composition gelling at temperature between 25°
C. and 60°
C., wherein said liquid component forms a homogeneous solid aqueous gel-like material.
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Abstract
Self-forming hybrid compositions consisting in admixed liquid and solid components enable the formation of bio-materials. The present invention proposes a) a thermo-sensitive self-forming liquid component, being water-based and containing at least a polycationic polymer such as chitosan, and an organic mono-phosphate source, which is a solution at a pH ranging from 6.5 to 7.4; b) a solid component being mineral and composed of at least one of calcium, fluoride, strontium, carbonate and phosphate salts. Solid mineral salts preferentially have a recognized bioactive potential such as the calcium phosphate salts for bones. Both solid and liquid components are admixed to form an injectable liquid slurry or pre-gelled paste that turn in situ into a hybrid uniform gel-like bio-material.
116 Citations
44 Claims
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1. An in situ self-forming mineral-polymer hybrid composition comprising:
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a) a water-based and thermo-gelling liquid component comprising at least one hydrosoluble cationic polymer, one organic mono-phosphate source, and optionally one water-soluble organic mono-sulfonate, mono-sulfate or mono-carboxylate source;
said liquid component having a pH between 6.5 and 7.4; andb) a water non-soluble solid component comprising at least one of calcium, fluoride, strontium, carbonate and phosphate salts, said solid component having a particle size ranging from 5 to 1000 micrometers, wherein said composition contains 50% weight to volume or less of the solid component and said liquid component and solid component are admixed together intimately to form a non-hardening thermo-gelling hybrid composition;
said hybrid composition gelling at temperature between 25°
C. and 60°
C., wherein said liquid component forms a homogeneous solid aqueous gel-like material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 43, 44)
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36. An in situ self-forming mineral-polymer hybrid composition comprising:
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a) a liquid component, comprising at least 0.5% w/v of a chitosan, 2.0% w/v of a glycerophosphate;
said liquid component having a pH between 6.5 and 7.4; andb) a solid component comprising at least one apatite and one tricalcium phosphate, said solid component having a particle size ranging from 5 to 1000 micrometers. - View Dependent Claims (37, 38, 39, 40, 41, 42)
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Specification