Abstract
Background: Temporary dental implants are used to support provisional prostheses. The goal of this study was to obtain the stress–number (S–N) curves of cycles of five temporary dental implants employing finite element methods. Additionally, a probabilistic analysis was carried out to obtain the failure probability of each dental implant. Methods: To obtain these curves, first the maximum value of the fracture load was obtained by simulation of a compression test. Subsequently, the fatigue life was simulated by varying each of the loads from the maximum value to a minimum value (10% of the maximum value), and the minimum number of cycles that it should support was calculated. Results: The fatigue limit of titanium in these implants was around 200 MPa with the maximum number of cycles between 64,976 and 256,830. The maximum compression load was between 100 and 80 N. Regarding the probability of failure, all implants were expected to behave similarly. Conclusions: This study of finite elements provided the values of maximum load supported by each of the implants, and the relationship between the stress in the implant and the number of cycles that it could support with a probability of failure. An international standard on how to perform fatigue studies in temporary dental implants was deemed necessary.
Highlights
Immediate provisional implants (IPI) are medical devices employed temporarily to support a provisional prosthesis for restoring a patient’s masticatory and aesthetics function during implant treatment
Provisional or temporary dental implants, which are inserted at the same time as the permanent implants, are used to hold the prosthesis, generally complete, while the permanent dental implants complete the osseointegration
The goal of this study was to obtain the stress-number of cycles (S-N) curves of temporary dental implants with five different lengths, employing finite element analysis, to know the fatigue properties, and to obtain the probability of failure associated to each cycle
Summary
Immediate provisional implants (IPI) are medical devices employed temporarily to support a provisional prosthesis for restoring a patient’s masticatory and aesthetics function during implant treatment. A patient can employ a provisional prothesis with these temporary dental implants [1]. There are some differences between provisional and permanent dental implants. Temporary dental implants are used to support provisional prostheses. The goal of this study was to obtain the stress–number (S–N) curves of cycles of five temporary dental implants employing finite element methods. Results: The fatigue limit of titanium in these implants was around 200 MPa with the maximum number of cycles between 64,976 and 256,830. Conclusions: This study of finite elements provided the values of maximum load supported by each of the implants, and the relationship between the stress in the implant and the number of cycles that it could support with a probability of failure. An international standard on how to perform fatigue studies in temporary dental implants was deemed necessary
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