The present invention deals with a bone implant matrix comprising a base matrix selected from the group comprising:- acellularized or acellularized non-demineralised bone matrix of any source,- matrix of natural mineral sources,- synthetic bioceramics matrix,or combinations of the above, wherein the surface of said base matrix is coated with an statistically homogeneous composition which is a reinforcing mixture containing at least a bio-degradable polyester or co-polymer thereof, at least a gelatine or hydrolysed gelatine and at least an artificial Proline-Rich Peptide.