A suggested design for a tissue level dental implant

Abstract

Objectives: The aim of the study was to test the stress distribution around a newly suggested design for tissue-level dental implant. Material and Methods: Newly designed modified reverse buttress thread dental implant is tested for the stress over the surrounding bone. Nine implant dimensions of this design were examined on two types of materials; commercially pure Titanium (TiG4) and Titanium alloy (TIG5). These nine implant dimensions, which can be used in the full dental arch are: (diameter/length; 3.5/11, 4/11, 4/9, 4.5/11, 4.5/9, 5/11, 5/9, 5/7, and 5.5/7 mm). The suggested implant was designed using Autodesk Inventor 202. ANSYS Workbench 2020 R2 was used for meshing and 3D finite element analysis. Results: Maximum Von Mises stress over the cortical bone is higher in the TiG5 model in all implant dimensions. The highest stress value was reported in the implant 4/9 mm dimension in both models. TiG5 model has the highest stress values over the cancellous bone. The higher level of stress over the surrounding cortical bone lies at the surface of the cortical bone, whereas the maximum stress over the surrounding trabecular bone was noticed near the tip of the first and second dental implant thread. Conclusion: Reasonable levels of stress were reported in the suggested design in both models. However, it would be justifiable to choose the TiG4 model for the suggested tissue level implant with the exclusion of a 4/9 mm dimension to ensure minimal stress over the surrounding cortical bone.