Patent ID: 7902270
Filing Date: 2011-03-08
Classification: A61L

Abstract:
1. A method of preparation of a material for medical or veterinary usage, in order to ensure an efficient biocompatibility in terms of biological acceptance of said material which is in a form of a molded piecework ready for implantation into living bone tissue, comprising in specific order: injection molding the piecework from a material made of 65% to 90% in weight of a polymer biocompatible binder and 10% to 35% in weight of calcium phosphate; surface pickling and decontamination of the molded piecework, wherein said surface pickling and decontamination comprise passing the molded piecework in successive baths subjected to ultrasound in specific order: a hydrochloric or sulphuric acid bath, an acetone bath, a hydrogen peroxide bath, a sodium hypochlorite bath, and a disinfectant product(s), each of said baths being separated by operations comprising water rinsing or passing in water baths subjected to ultrasound; and a subsequent sterilization operation by autoclave, wherein said surface treatment is such as the surface of said molded piecework is provided with emerging crystallized calcium phosphate that is resorbable after implantation.