Planar alloplastic bone replacement material and methods comprise at least one plate for augmentation of bone defects, whereby the bone replacement material consists of a biocompatible plastic material, a biocompatible metal and/or a biocompatible metal alloy, whereby the at least one plate comprises a planar structure and comprises a plurality of pins extending outwards from the planar structure of the at least one plate, whereby the pins each comprise at least one connecting element, whereby the pins are deformable elastically and are arranged sufficiently close to each other such that pressing the surfaces of multiple plates onto each other causes the connecting elements of different plates to interlock with and/or snap into each other and the mutually interlocked and/or snapped-in plates form an open-pored body of mutually interlocked and/or snapped-in plates.