[Design of HA/Ti biomedical implants with the use of ion-beam-assisted deposition]

Hydroxy-apatite (Ca10(PO4)6(OH)2,HA) is a potential material for coating on metal implants owing to its bioaffinity and osteo-integration to body. At present, in addition to bulk HA directly used in restoration and reconstruction surgery, hydroxy-apatite is also coated on metal implants by plasma-spraying method, adhesion and sintering. However, these kinds of biomaterials are restricted in application due to their insufficient strength and weak bonding. It is of great advantage to modify the surface of titanium and its alloy by ion-beam-assisted deposition (IBAD) combining ion implantation with physical vapor deposition(PVD). This paper is focused on the design of HA/Ti implants by ion-beam-assisted deposition technique and the computation of fabricating parameter using Trim96 program. The present investigation lays a foundation of further researches and application.