[An evaluation of the forces in traditional and so-called "passive" post and core technics]

After a short review of the literature concerning biomechanics of cast post and core the authors analyse the distribution of mechanical stress as a function of some basic variables such as the cementation pattern or the degree of congruency between the interior walls of the root and the surface of the root segment of post and core. The authors conclude that the association of an elastic cementation to a certain incongruity between post and core and radix doesn't seem to have (in theory at least) characteristics compatible with a better protection against cervical fracture (as regards the traditional post and core).