Table 2: Crown fracture classification (Spinas, 2002).

Class A Simple enamel lesions involving mesial or distal coronal angle or incisal edge
Class B Enamel-dentin lesions involving mesial or distal coronal angle and incisal edge
Subclass b1: pulp exposition
Class C Enamel-dentin lesion involving incisal edge at least a third of the crown
Subclass c1: pulp exposition
Class D Enamel-dentin lesion involving mesial or distal coronal angle and the incisal and palatal surface with root involvement
Subclass d1: pulp exposition
Class H Fractured tooth with silent or necrotic pulp