B iomaterials are defined as substances or combinations of substances, other thandrugs, synthetic or natural in origin, which can be used for any period of time, as a whole or asa part of a system which treats, augments, or replaces any tissue, organ or function of the body.There are in general terms two types of biomaterials, those which are 'inert', accepting that thisis not strictly possible in the way this is understood in chemistry, and those which are'bioactive'. In both cases there must be a degree of acceptance by the body, expressed as thebiocompatibility of the material, a very complex concept involving biochemical, cellular, andmechanical interactions between the implanted material and the living tissues. In most casesthere is a response to the implanted biomaterial from the organism and the control of this is oneof the major areas of research.
|