Dental Anatomy and Development By Rosalyn Sulyanto, DMD, MS, Boston Children's Hospital Reviewed / Revised Aug 2021 | Modified Sep 2022 View Patient Education Teeth Supporting Tissues Mouth Topic Resources Identifying the teeth Cross section of a canine... Gingival Recession Teeth The teeth are categorized as incisors, canines, premolars, and molars and conventionally are numbered beginning with the maxillary right 3rd molar (see figure Identifying the teeth).