The location of the maximum stress adjacent to the bone implant interface: cylindrical screw implant (a) and the stepped screw implant (b). MSC(Sup) and MSC(Inf) indicates the maximum von Mises stress in the cortical bone adjacent to the implant neck at the superior (Sup) and inferior (Inf) notches, respectively; MST, the maximum von Mises stress in the trabecular bone adjacent to the implant, which is at the section L1 (left) or the interpoint between L1 and L2 (right)