A theoretical estimation of the interfacial shear strength
produced by an irregular surface roughness is less straightfor-
ward. The following iterative procedure is recommended (Fig. 2):
(1) assume a size of the gap between implant and bone at shear
fracture based on a study of a profile of the roughness. (2) Calcu-
late the pressure that pushes the bone away from the implant
surface and compresses the implant using