The present invention relates to the prevention of dental calculus formation owing to the mixing, with the toothpaste, tooth powder, dental gel and mouthwash, of a composition comprising the nano-sized hexagonal boron nitride, developed for preventing the formation of the dental calculus that accumulates around the teeth and causes the gingival diseases, and the application of the same mixture at regular intervals to the teeth, thereby enabling said nano composition to find its way into the pores on the tooth and into the pores in the tooth plaque.
