Figure 3.

a) The parameter of `eqHU' is dependent on the Hounsfield Units of the surrounding elements.

b) Piece-wise linear relation between eqHU and the applied erosion. The maximum erosion was set to 20μm and HU_min and HU_max to 100 and 1500, respectively.

c) Direction of nodal erosion. The unit edge lengths, v_{1_i} and v_{2_i}, were the unit element edges. The unit normal vector of the element face, u_i, was always pointing outwards.

d) The eroded solid mesh of the bone and the solid mesh of the cement plotted on top of the μCT-data.

e) Zoomed interface of figure d. with bone (dark grey), cement (light grey) and gaps (black).