Abstract:
Although, dental implants are excellent prosthetic treatment option, implant complications do occur.
To evaluate the effect of different implant angulations on the displacements and stress distributions on the
implants, surrounding bone and its clinical consequences. Twenty-seven implants were placed in twelve
patients. Cone Beam CT was used preoperatively to plan implant placement and post operatively to evaluate
the actual implants positions. Finite element analysis was achieved using standard implant for a parametric
study. A load of 100 N was applied at four different angulations relative to the long axis of the implant. Implant
angulation discrepancies ranged from 0.7 - 32.6 degrees with mean value of 9.0 degrees. Axial displacement at
loading angles zero-30 was; implants 4.02 - 4.6 micron, spongy bone 2.67 - 4.03 microns, compact bone 2.56 -
4.46 microns. While compressive stress in spongy bone increased from 2.2 to 4.2 MPa, and similar trend was
observed for the other stress types in implant, cortical and spongy bone. The increase of stresses was directly
proportional to the increase in implant angulations. Also, loading angulations may increase lateral
displacement of implant which may explain the bone resorption in more angulated implants
