The present invention relates to new ultrahigh molecular weight polyethylene (UHMWPE) articles comprising at least a porous UHMWPE-type polymer structure with an at least trimodal pore distribution and to a process for its preparation which comprises using at least a porogen agent as well as a solvent for generating the porosity. The resulting UHMWPE-type polymer article is well suited for medical implants and/or scaffolds among other applications.