However, CPU
time of linear contact model is about 1/20 of the non-linear model.
The boundary conditions of the model were defined as
fixed in all three mutually perpendicular coordinate direc-
tions on the lateral and one of the base surfaces of the
bone without the implant assuming the results on the implant
bone interface do not vary too much as the boundary con-
ditions were far from the implant–bone interface according
to Saint Venant’s principle.