Patent ID: 8308807

Claim:
An implant for anchorage to a bone, wherein bony tissue comprises at least a portion of the total tissue of the bone, the implant comprising: a fastening side for arrangement adjacent to the bone; and a plurality of anchorage pins arranged on the fastening side and together extending away from the fastening side in essentially the same longitudinal direction, wherein the anchorage pins anchor the implant in the bone, with at least one of a pin arrangement and a geometry of the plurality of anchorage pins being different in different regions of the fastening side of the implant and the volume of the anchorage pins per unit of area of the fastening side of the implant being different in different regions of the fastening side, with at least one of the pin arrangement and the geometry of the plurality of anchorage pins selected in accordance with the proportion of bony tissue to the total tissue of the bone opposite to which the fastening side is provided for implantation such that upon implantation a lower volume of tissue per unit of area of the fastening side of the implant will be displaced by the anchorage pins in regions of a relatively higher proportion of bony tissue than in regions of a relatively lower proportion of bony tissue, wherein a surface density of the anchorage pins amounts to at least 3/cm 2 and at most 30/cm 2 , wherein each of said anchorage pins is essentially freestanding in said longitudinal direction.