PNNL

Abstract

The use of titanium in biomedical applications continues to gain attention because of its unique properties, including high specific strength, low density and lightweight feel, excellent corrosion resistance, and biocompatibility. These translate into tremendous clinical advantages in terms of reduced recovery time and rehabilitation and improved patient comfort, making it a nearly ideal material for the development of medical bone reinforcement and replacement products. At present however, the fabrication of titanium-based implants is limited to a costly, multi-step process of vacuum arc melting, hot rolling, scale removal, vacuum annealing, machining, and surface treatment. There is an overwhelming need in the industry for an alternative method of titanium manufacture, one that simultaneously reduces the cost and complexity of processing, enhances design flexibility, and improves the biological activity of the implant surface without compromising its structural integrity, i.e. its strength, fatigue resistance, and biocompatibility. Metal injection moulding (MIM) is a leading candidate.