Tooth decay is a process which softens and destroys the hard tissues of the tooth. These tissues are called enamel and dentine. Bacteria, feeding on sugar, produce the acid that fuels this process.
It is treated by removing the parts of the tooth that have gone bad, and replacing the missing parts with a ‘filling‘.
There can be a direct relationship between stress and tooth decay. Stress (feeling upset) can lead to an increased desire to “sweeten” our lives and ourselves. This results in a greater frequency of sugar in the diet. The increased frequency of sugar in the diet leads to tooth decay.
It is true that there are many other factors in tooth decay, but this is the major factor and one over which we have direct control.