Abstract
Aim
This study aims to analyse strain values recorded by 48 strain gauges placed at various positions on an experimental model simulating a multi-implant fixed dental prosthesis. The study also aims to enhance the understanding of strain gauge positioning in the evaluation of the passive fit of implant frameworks.
Methods
An experimental assembly of a polyurethane resin block with three implant analogues and a digitally designed, milled titanium FDP framework was fabricated. Forty-eight strain gauges were positioned at peri-implant, abutment, coping, and connector levels, with readings recorded during manual tightening of the prosthetic screws. The data were organised into four tables, summarising descriptive statistics for each group to facilitate observation and comparison.
Results
The strain values varied significantly across the 48 strain gauges, with differences observed based on their positions at peri-implant, abutment, coping, and connector levels. Within the limitations of this study,strain gauges (SGs) at the peri-implant level showed the highest variability and stress concentrations, while those at the abutment, coping, and most connector levels exhibited minimal activity.
Conclusion
Peri-implant strain gauge placements appear useful for evaluating the passive fit of implant-supported prostheses. However, strain gauges at the abutment, coping, and connector levels could be omitted to streamline experimental setups and reduce costs.