Finite Element Analysis of the Effect of Tightening Torque on the Connection Stability of a Two-Piece Zirconia Implant System

Figure 2

Boundary and loading conditions. (a) Screw preloading with the bone block fixed along all the axes; the yellow arrows indicate the preloading required to achieve a tightening torque of 25, 35, and 45 N cm. (b) External loading: 200 N vertically (at each of the 60 nodes on three pits) and 100 N obliquely (at each of the 30 nodes on three cusps).

(a)

(b)