There is a fixation device for promoting fusion and/or osteosynthesis of a first bone segment and a second bone segment, comprising a bone plate portion including an outer surface, an inner surface and at least one fixation aperture extending from the outer surface to the inner surface and a bone wedge portion extending from the plate portion at a first end and a free opposite end, the bone wedge portion comprising a porous architecture configured to promote bone ingrowth, the wedge portion defining first and second engagement surfaces for engaging the first bone segment and a second bone segment, respectively. There is also a method of manufacturing a fixation device for promoting fusion and/or osteosynthesis of a first bone segment and a second bone segment, a method of promoting fusion and/or osteosynthesis of a first bone segment and a second bone segment, and a fixation kit.