الفهرس 
Comparison between three different Abutment-implant Connection designs and their effect on Stress Distribution on the peri-implant bone area and on the abutment retaining screw: A Finite Element Analysis
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Abstract
Aim: to compare internal hex, external hex and morse taper Connections designs and their effect on Stress Distribution on the peri-implant bone area and on the abutment retaining screw.
Methodology: In this study, finite element analysis is used to evaluate the stress patterns in the implant abutment connection components and in the peri-implant bone using three different implant abutment connection designs. Internal hex, external hex and morse taper Connections designs were used in this study. Titanium implants were used, each implant is 4.7 X 10 mm in the 3 models. The three models are a subjected to 100N/cm vertical loading. The posterior mandibular region is the area of choice and in which the implants are inserted. It is meshed using finite element analysis.
Results: the Morse taper connection showed a better stress distribution in the crestal and middle peri-implant bony area followed by the internal hex and then the external hex while it was almost the same in the apical peri-implant bony area for the three models while the stresses along the abutment retaining screw were a little better in the external hex than the internal hex.
Conclusion: The type of implant abutment connection play a significant role in stress distribution on the peri-implant bone and the implant abutment components. Morse taper and internal hex connections generated less stress on the peri-implant bone when compared to the external hex connection. The external hex connection generated less forces on the screw than the internal hex connection on axial loading.