When a biomaterial is implanted in the body as part of a therapeutic or diagnostic procedure, requires the stimulation of a proper response from the body. In order to modulate the host response and reduce inflammation, the interface between the biomaterial and the body can be functionalised with polymers, proteins or molecules with antibacterial and anti-inflammatory behaviour. Chitin derivatives, extracted from crustacean shells, can be used to modulate the host response to an implant with a nanotextured coating. Since chitin is a waste product of the food industry, its use as a coating has a green approach to recycle and transform a waste into a high added value product.