الفهرس 
assessment of stress distribution using implants with different apical diameters in posterior mandible: 3d finite element analysis
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Abstract
Aim: is to Compare the stress distribution pattern in six different implants with different apical
diameters by computing the distribution of stresses in the Bone/implant interface in the posterior
mandible with different magnitude and direction of force applied using finite element analysis
software. This study could help in the selection of optimal taper for the implant and obtain ideal
stress distribution with minimal micromotion.
Methodology: In the present study, six implant models, exhibiting six different taper degrees
with different apical diameters, have been created using Solidworks, and each model was
assembled with a superstructure and examined for stress distribution and micromotion using
ANSYS software
Results: Upon analysis, 3, 6 mm apical diameter was shown to have the least average principal
stress at the implant-Bone interface in different load intensities and directions. On the other
hand, 100N Load and Oblique ones showed to result in the highest stresses.
Three-way ANOVA analysis for the interaction of apical diameter, Load amount, and direction
showed that different apical diameter had a statistically significant effect on maximal principal
stresses and micromotions.
Conclusions: The apical diameter of the implant has a definite effect on the stress distribution
and the resulted micromotions on the implant .The optimal apical diameter that gave the least
stresses on bone in vertical and oblique loads was the 3.6mm with 1.28 tapering degree.