Biomaterials are natural or synthetic materials that are intended to interrelate with the biological system either as a part of the medical device or to replace or to repair any injured organs or tissues. Biomaterials are naturally available materials or they can be made synthetically. Silk and gelatin are few natural biomaterials, while the Synthetic ones are the various forms of polymers, ceramics, and composites. To re-establish injured portions of the musculoskeletal system and in dental and orthopedic fields Bioceramics like Alumina, Bioglass, and Zirconia are used. Biocomposites are designed 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 mostly a hard choice of biomaterials in the fields of dental, orthopedic, cardiac implants because metals can lead to wear, corrosion. So, surface coating and modification of metals are essential for medical applications.