colorimetric photoelastic analysis of tension distribution around dental implants

Resumo

To demonstrate a colorimetric photoelastic analysis
of tension distribution around dental implants under axial loads.
Material and methods: Eight different designs of implant from
two manufacturers were connected to their abutments, placed into
epoxy resin blocks and observed under a polariscope coupled
to a universal testing machine while subjected to axial loads of
5 N. The obtained images were quantitatively analyzed by image
analysis software. Results: A strong correlation was found between
the surface area and the implant fringe transition area (magenta
color) of most samples (r = 0.908), and a moderate correlation
was found between the fringe transition area and the mean thread
height of the implants (r = 0.706, or r = 0.768 using a quadratic
function). Conclusion: By this biomechanical study, it was possible
to demonstrate a correlation of some implant characteristics to the
colored fringe areas of tension distribution, a colorimetric method
that can be used in comparative studies of photoelastic analysis.
Clinical significance: An accurate planning and knowledge of oral
implant biomechanics is important so that a safe and long-lasting