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Stress distribution patterns of implant supported overdentures-analog versus finite element analysis: A comparative
Soumyadev Satpathy1, C L Satish Babu1, Shilpa Shetty1
1Department of Prosthodontics, V.S. Dental College and Hospital, Bengaluru, Karnataka, India.
Aims And Objectives:
The aim of this study was to asses & compare the load transfer characteristics of Ball/O-ring and Bar/Clip attachment systems in implant supported overdentures using analog and finite element analysis models.
Methodology:
For the analog part of the study, castable bar was used for the bar and clip attachment and a metallic housing with a rubber O-ring component was used for the ball/O-ring attachment. The stress on the implant surface was measured using the strain-gauge technique. For the finite element analysis, the model were fabricated and load applications were done in a similar manner as in analog study.
Results:
The difference between both the attachment systems was found to be statistically significant (P<0.001).
Conclusion:
Ball/O-ring attachment system transmitted lesser amount of stresses to the implants on the non-loading side, as compared to the Bar-Clip attachment system. When overall stress distribution is compared, the Bar-Clip attachment seems to perform better than the Ball/O-ring attachment, because the force was distributed better.
