Rapid prototyping (RP) technology is becoming more and more prevalent in medicine. RP is used to design, develop and manufacture medical devices and instrumentation, and to fabricate drug dosage forms. This process is also increasingly being used by surgeons to plan complex operations, especially in the craniofacial and maxillofacial areas. Further, RP shows promise in the area of tissue engineering through the use of biomaterials including the direct manufacture of biologically active implants. This book focuses on bio materials and prototyping applications in medical environments. The applications that are discussed integrate bio-materials, CAD, and physical prototyping techniques.