An orthopaedic prosthetic component , comprising: a base, a porous three-dimensional structure [110; 304] attached to the base, the porous three-dimensional structure being configured to permit bone in-growth and having an outer surface boundary , and a plurality of engagement studs [140; 200; 300; 510] extending outwardly from the outer surface boundary [130; 520] of the porous three-dimensional structure , each engagement stud [140; 200; 300; 510] having an outer impact tip [145; 330] configured to engage a patient's bone, wherein a distance is defined between the outer surface boundary and the outer impact tip , the distance being in a range of 0.03 millimeters and 0.30 millimeters; characterized in that : the engagement studs [140; 200; 300; 510] and the porous three-dimensional structure are a single integral metallic component; and wherein: each engagement stud [140; 200; 300; 510] extends along a central axis [314; 562], each engagement stud [140; 200; 300; 510] of a first number of engagement studs [140; 200; 300; 510] is positioned at a first rotational position about its central axis , and each engagement stud [140; 200; 300; 510] of a second number of engagement studs [140; 200; 300; 510] is positioned at a second rotational position about its central axis , the second rotational position being different from the first rotational position. a base, a porous three-dimensional structure [110; 304] attached to the base, the porous three-dimensional structure being configured to permit bone in-growth and having an outer surface boundary , and a plurality of engagement studs [140; 200; 300; 510] extending outwardly from the outer surface boundary [130; 520] of the porous three-dimensional structure , each engagement stud [140; 200; 300; 510] having an outer impact tip [145; 330] configured to engage a patient's bone, wherein a distance is defined between the outer surface boundary and the outer impact tip , the distance being in a range of 0.03 millimeters and 0.30 millimeters; characterized in that : the engagement studs [140; 200; 300; 510] and the porous three-dimensional structure are a single integral metallic component; and wherein: each engagement stud [140; 200; 300; 510] extends along a central axis [314; 562], each engagement stud [140; 200; 300; 510] of a first number of engagement studs [140; 200; 300; 510] is positioned at a first rotational position about its central axis , and each engagement stud [140; 200; 300; 510] of a second number of engagement studs [140; 200; 300; 510] is positioned at a second rotational position about its central axis , the second rotational position being different from the first rotational position. the engagement studs [140; 200; 300; 510] and the porous three-dimensional structure are a single integral metallic component; and wherein: each engagement stud [140; 200; 300; 510] extends along a central axis [314; 562], each engagement stud [140; 200; 300; 510] of a first number of engagement studs [140; 200; 300; 510] is positioned at a first rotational position about its central axis , and each engagement stud [140; 200; 300; 510] of a second number of engagement studs [140; 200; 300; 510] is positioned at a second rotational position about its central axis , the second rotational position being different from the first rotational position. each engagement stud [140; 200; 300; 510] extends along a central axis [314; 562], each engagement stud [140; 200; 300; 510] of a first number of engagement studs [140; 200; 300; 510] is positioned at a first rotational position about its central axis , and each engagement stud [140; 200; 300; 510] of a second number of engagement studs [140; 200; 300; 510] is positioned at a second rotational position about its central axis , the second rotational position being different from the first rotational position. <EOS>