Ozone, first discovered in 1840, is a naturally occurring compound consisting of three oxygen atoms. It is found in nature in the form of a gas in the atmosphere in a concentration of 1–10 ppm1 where...

A Class I carious lesion (ICDAS 3)1 was detected in the mesial pit of an upper second molar (Figure 1). The lesion was diagnosed as active with respect to enamel cavitation exposing dentine. In...