Tooth filling is a way to replace lost tooth structure either through decay or simply when it is broken.
Dental caries is a progressive bacterial damage to teeth exposed to the saliva. Caries is one of the most common of all diseases and still a major cause of loss of teeth. The ultimate effect of caries is to break down enamel and dentine and thus open a path for bacteria to reach the pulp.
Dental Caries is multifactorial : cariogenic (acidogenic) bacteria, bacterial plaque, stagnation areas, fermentable bacterial substrate (sugar – broken down from carbohydrates or food substance) and susceptible tooth surfaces.