Thanks for writing your query.
is soft deposits on the teeth surface and prosthesis
in the oral cavity,if not removed become mineralised and hard known as calculus.
Lower incisors and upper 1st molars are the most common site of plaque deposition.
Calculus can not be removed by brushing,so i would suggest you visit a dentist
in your area and get the thorough scaling and polishing done at the earliest otherwise it will results in gingivitis
in which inflammation of gums and in severe cases bleeding also present.
Hope this will be helpful.
Dr. Gunjan Gupta