Table 2: Radiographic interpretation based on criteria put forward by Pitts (1984)³³

Score		Caries level		Criteria
R0		D0-Sound		No Radiolucency
R1		D1-Initial caries		Zone of increased radiolucency, confined to outer half of enamel
R2		D2-Enamel caries		Zone of increased radiolucency involving both inner and outer halves of enamel layer, including lesions extending up to but not beyond the DEJ
R3		D3-Dentin caries		Zone of increased radiolucency penetrating the enamel and DEJ and progressing into the dentin