This document summarizes key aspects of tooth development, structure, and genetic conditions. It discusses the embryology and signaling pathways involved in tooth formation such as SHH, BMP, WNT, and FGF. Mutations in these pathways can result in dental anomalies like tooth agenesis, fusion, or altered morphology. The structure and differences between primary and secondary dentition are outlined. Genetic conditions associated with changes in signaling include FOP (ACVR1), SSPS and OODD (WNT10A), and taurodontism. The chronology and factors influencing tooth eruption are also summarized.