A tooth fracture extends through the crown and continues below the cementoenamel junction into the root. How is this classified?

According to the World Dental Federation (FDI) classification of traumatic dental injuries, a crown-root fracture involves fracture of both the crown (enamel and dentin) and the root (cementum and dentin), extending below the cementoenamel junction. It may be complicated (with pulp exposure) or uncomplicated (without pulp exposure). This is distinct from a pure root fracture (horizontal fracture within the root) and crown fractures that do not extend below the CEJ.