KCNQ3 (potassium voltage-gated channel subfamily Q member 3) encodes the Kv7.3 neuronal voltage‐gated potassium (K + ) channel subunit.31 Regarding the Gene Review (https://www.ncbi.nlm.nih.gov/books/NBK201978/, accessed on May 2021), the KCNQ3-related disorder comprises three kinds of clinical presentations: benign familial neonatal epilepsy, benign familial infantile epilepsy, and KCNQ3-related DD. The gene discussed is KCNQ3; the disease is dentin dysplasia.