First the dental plaque: Dental plaque is a film or mass of bacteria that grows on surfaces within the mouth. It appears or can be identifies as a while/pale yellow “ Layer of Slime ” found between two teeth. This may appear dark brown or black in case some smokers and individuals who may refrain from regular dental check-ups or cleaning (scaling) as and when required.
A dental plaque deposit gets harder with time if not treated (scaled out timely) and occasionally your dentist may need a 90 bend tool to scrape or pull this thing between your through to get this stone hard thing away from you, leaving you bleeding but smiling eventually.