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Evaluation of design parameters of eight dental implant designs: a two-dimensional finite element analysis
S R Desai1, M S Desai, G Katti
1Department of Periodontology, H.K.E. Society's S. Nijalingappa Institute of Dental Sciences and Research, Gulbarga, Karnataka, India. drshride@yahoo.com
Aim:
Implants could be considered predictable tools for replacing missing teeth or teeth that are irrational to treat. Implant macrodesign includes thread, body shape and thread design. Implant threads should be designed to maximize the delivery of optimal favorable stresses. The aim of this finite element model study was to determine stresses and strains in bone by using various dental implant thread designs.
Materials And Methods:
A two-dimensional finite element model of an implant-bone system is developed by using Ansys. An oblique load of 100 N 45° to the vertical axis of implant as well as a vertical load was considered in the analyses. The study evaluated eight types of different thread designs to evaluate stresses and strains around the implants placed in D1 bone quality.
Results:
Forty-five-degree oblique von Mises stresses and strains were the highest for the filleted and rounded square thread with an angulation of 30° (216.70 MPa and 0.0165, respectively) and the lowest for the trapezoidal thread (144.39 MPa and 0.0015, respectively).
Conclusions:
The findings in this study suggest that the filleted and rounded square thread with an angulation of 30° showed highest stresses and strains at the implant-bone interface. The trapezoidal thread transmitted least amount of stresses and strains to the cortical bone than did other models.
