An Ellis Class II crown fracture of a tooth involves:

Ellis Class II fractures extend through enamel into dentin but do NOT expose the pulp; they are often sensitive and require dentin coverage/protection.Other options: Class I = enamel only; Class III = enamel, dentin, and pulp exposure; a root fracture is a separate category.Key exam takeaway: Ellis I = enamel; II = enamel + dentin (no pulp); III = pulp exposed.