In this book, we present the state of the art of nanotechnology research intended for applications in biomedical technologies in three subfields: nanodrugs and drug delivery inside the body; prostheses and implants; and diagnostics and screening technologies for laboratory use. For each of these three subfields, we explore the relevant developments in research. Nanoparticles such as nanotubes and quantum dots are increasingly applied as drug delivery vehicles. Applications may include gene therapy, cancer treatments, and treatments for HIV and other diseases for which no cures presently exist