Compression and bending performance of selective laser melted Ti6Al4V porous structures with cylindrical thin walls for dental implants.

Abstract

Titanium alloy dental implants play a crucial role in the field of oral rehabilitation. However, the use of solid designs can give rise to mechanical problems such as mismatched compressive elastic modulus with the host bone tissue, resulting in stress shielding and stress concentration. These problems have been a persistent bottleneck in their application effectiveness. To overcome this challenge, this study creatively designed five types of porous structures with cylindrical thin wall based on the Gibson-Ashby theoretical model. The aim is to optimize the mechanical performance of dental implants, enhance their compatibility with the host bone tissue, and utilize selective laser melting technology for precise fabrication of porous structures using Ti6Al4V material. Through a combination of simulation analysis and compression experiments, the stress and strain distributions of the five structures are systematically investigated under different bite conditions. The experimental results demonstrate that all five porous structures designed in this study effectively alleviate stress shielding phenomenon in dental implants, significantly improving the bonding performance between the implants and bone tissue. This meets the clinical implantation requirements and provides strong theoretical support for the application of dental implants in clinical settings.