Abstract: A supporting or strengthening element (1) for dental prostheses or crown restorations made of a composite material consisting of a matrix (2) in which is embedded at least one solid phase (3) appropriately distributed in it, has a total length divided into at least three different sections (4, 5, 8), namely an apical section (4), a crown section (8) and an intermediate section (5); the sections (4, 5, 8), preferably equal in length, have uniform flexural and/or torsional rigidity obtained by a combination of different local geometries and different flexural and/or torsional elasticity moduli. The different elasticity moduli of the individual sections (4, 5, 8) are obtained by a suitably differentiated distribution of the solid phases (3) in the body of the matrix (2).