|About this Abstract
||Materials Science & Technology 2011
||Next Generation Biomaterials
||Laser Processed Tantalum: Mechanical, In vitro Wear and Biological Properties
||Amit Bandyopadhyay, Vamsi Krishna Balla, Susmita Bose
|On-Site Speaker (Planned)
Metallic biomaterials currently in use for load-bearing orthopedic applications are bioinert. Recent in vitro and in vivo studies demonstrated that Ta is a promising metal that is bioactive, but its applications have been limited by processing challenges. We report how to process Ta to create net shape porous and dense structures as well as coatings using Laser Engineered Net Shaping (LENS). Porous Ta samples with relative densities between 45 to 73% have been successfully fabricated and characterized for their mechanical properties. In vitro cell materials interactions, using human osteoblast cell line showed six times better biocompatibity than Ti, and comparable to that of HA. In vitro linear reciprocating wear tests on Ta coatings showed one order of magnitude less wear rate compared to Ti. Our results demonstrate that Ta coatings can potentially minimize the early-stage bone-implant interface due to their high wear resistance and toughness compared to popular HA coatings.