Abstract: Disclosed is the preparation of injectable collagen suspensions, to the method for preparing the suspensions, and to the uses thereof, particularly for forming dense collagen matrices.

Abstract: Disclosed is a method for preparing a transparent fibrillated collagen matrix capable of being used as a tissue substitute in the production of a tissue or an artificial organ, in particular for a cornea substitute.

Abstract: Disclosed is the preparation of injectable collagen suspensions, to the method for preparing the suspensions, and to the uses thereof, particularly for forming dense collagen matrices.

Abstract: A method for preparing a synthetic material having an organic phase and a mineral phase which consists in preparing an initial acidic aqueous solution of collagen which is a precursor for the organic phase (I), and at least one aqueous solution of precursors for the mineral phase (II), and in precipitating the collagen by increasing the pH to a value of at least 7. The method includes the concentration of collagen in the acidic aqueous solution is at least 75 mg/ml and remains constant during said increase in pH. The mineral phase precursors have at least one calcium salt and at least one phosphate salt. The precipitation of the mineral phase (II) is carried out by bringing the mineral phase precursor solution into contact with the organic phase (I), the bringing into contact being carried out before or after the precipitation of the organic phase (I).

Abstract: Method for preparing a homogeneous collagen-based material by concentration of a collagen solution, includes bringing a collagen solution into contact by way of continuous injection and use of the material for tissue repair.

Abstract: A method for preparing a synthetic material having an organic phase and a mineral phase which consists in preparing an initial acidic aqueous solution of collagen which is a precursor for the organic phase (I), and at least one aqueous solution of precursors for the mineral phase (II), and in precipitating the collagen by increasing the pH to a value of at least 7. The method includes the concentration of collagen in the acidic aqueous solution is at least 75 mg/ml and remains constant during said increase in pH. The mineral phase precursors have at least one calcium salt and at least one phosphate salt. The precipitation of the mineral phase (II) is carried out by bringing the mineral phase precursor solution into contact with the organic phase (I), the bringing into contact being carried out before or after the precipitation of the organic phase (I).

Abstract: The invention relates to a material that can be used as a bone substitute and to a method for the preparation thereof. The material comprises an organic phase (I) comprising striated collagen fibrils constituted of collagen I triple helices, said fibrils being organized over a large distance according to a 3D geometry associating aligned domains and cholesteric domains, and also isotropic domains where they are not organized; and a mineral phase (II) comprising apatite crystals having a hexagonal crystalline structure, space group 6/m, comprising at least calcium ions and phosphate ions; the axis c of said apatite crystals of the mineral phase is coaligned with the longitudinal axis of the striated collagen fibrils of the organic phase and the collagen content in the material is at least 75 mg/cm3.

Abstract: Method for preparing a homogeneous collagen-based material by concentration of a collagen solution, includes bringing a collagen solution into contact by way of continuous injection and use of the material for tissue repair.

Abstract: The invention relates to a material that can be used as a bone substitute and to a method for the preparation thereof. The material comprises an organic phase (I) comprising striated collagen fibrils constituted of collagen I triple helices, said fibrils being organized over a large distance according to a 3D geometry associating aligned domains and cholesteric domains, and also isotropic domains where they are not organized; and a mineral phase (II) comprising apatite crystals having a hexagonal crystalline structure, space group 6/m, comprising at least calcium ions and phosphate ions; the axis c of said apatite crystals of the mineral phase is coaligned with the longitudinal axis of the striated collagen fibrils of the organic phase and the collagen content in the material is at least 75 mg/cm3.

Abstract: The invention relates to a material that can be used as a bone substitute and to a method for the preparation thereof. The material comprises an organic phase (I) comprising striated collagen fibrils constituted of collagen I triple helices, said fibrils being organized over a large distance according to a 3D geometry associating aligned domains and cholesteric domains, and also isotropic domains where they are not organized; and a mineral phase (II) comprising apatite crystals having a hexagonal crystalline structure, space group 6/m, comprising at least calcium ions and phosphate ions; the axis c of said apatite crystals of the mineral phase is coaligned with the longitudinal axis of the striated collagen fibrils of the organic phase and the collagen content in the material is at least 75 mg/cm3.