A composite material including biocompatible and bioresorbable glass, a biocompatible and bioresorbable matrix polymer and a coupling agent capable of forming covalent bonds. The composite also includes a compatibilizer, where at least 10% of the structural units of the compatibilizer are identical to the structural units of the matrix polymer, and the molecular weight of the compatibilizer is less than 30000 g/mol. The use of this composite, a medical device which includes the composite and a method for preparing the composite are also disclosed.