Biomaterials are the non-drug substances which are designed to interact with the biological system either as a part of a medical device or to replace or repair any damaged organs or tissues. Biomaterials can be derived either naturally or synthetically. Natural Biomaterials are silk, gelatin, etc. while the Synthetic ones are the various polymers. Bio-ceramics like Alumina, Bioglass, and Zirconia are used to repair damaged portions of the musculoskeletal system and also used in dental and orthopedic fields. Bio-composites are formed by using resin and natural fibers. It can be non-wood natural fibers (rice, wheat, coconut, etc.) or wood fibers (magazines, soft and hardwoods). Metals are mainly a choice of biomaterials in fields of dental, orthopedic, cardiac implants. As metals can lead to wear, corrosion, so surface coating and modification of metals are necessary for medical applications.