Patent ID: 9724144
Date: 2017-08-08
CPC Classifications: A61B,A61L

Claim:
1. A method for forming a bone regeneration membrane, comprising the steps of: forming, at room temperature, a dense layer made of resorbable polymer, said dense layer having first and second opposite surfaces and being adapted to form a barrier to cells and soft tissues, the step of forming the dense layer comprising the steps of: mixing the resorbable polymer with a solvent to obtain a polymer solution, casting said polymer solution onto a collecting surface, spreading said polymer solution on the collecting surface, wherein the cast and spread resorbable polymer precipitates and solidifies by evaporation of the solvent to form a substantially non-porous film, wherein the nanofibrillar layer is deposited on the first surface of the dense layer as collecting surface during the step of spreading the polymer solution, the step of attaching the nanofibrillar layer to the first surface of the dense layer comprising the formation of hydrogen bonds as the polymer of which the dense layer is made precipitates and solidifies by evaporation of the solvent.