What does this patient have?

The clinical photo shows generalized enamel surface irregularity/pitting and brownish discoloration affecting the enamel layer itself, consistent with amelogenesis imperfecta (a hereditary defect of enamel formation). Dentinogenesis imperfecta primarily shows a translucent, opalescent appearance from a dentin defect; dentin dysplasia types 1 and 2 are rarer dentin developmental anomalies with their own distinct radiographic root/pulp findings, not primarily an enamel surface defect like this.