Lower central secondary incisor tooth at a glance
- What it is
- The permanent lower central incisor, the smallest tooth in the mouth, one on each side of the midline of the lower jaw.
- Location
- It lies in the lower dental arch, as the central tooth of the mandibular arch next to the midline.
- Function
- It cuts and shears food.
- Body system
- Digestive · paired (left and right)
- FMA ID
- FMA57143 (Foundational Model of Anatomy)
Key facts
- Typical eruption age: about 6 to 7 years.
- FDI notation: 31 (left) and 41 (right).
- It is the smallest tooth of the permanent dentition, with a narrow single root flattened from side to side.
- Its pulp and periodontium are supplied by the inferior alveolar nerve (CN V3), so an inferior alveolar nerve block numbs the lower teeth on that side.
Clinical relevance
Dental caries and periodontal disease are the main causes of tooth loss.
Structures next to the lower central secondary incisor tooth
The nearest named structures in the 3D model, measured from the centre of each part:
- Lower lateral secondary incisor tooth · digestive
- Lower secondary canine tooth · digestive
- Lower first secondary premolar tooth · digestive
- Lip · digestive
- Sublingual gland · digestive
- Lower second secondary premolar tooth · digestive
- Gingiva of lower jaw · digestive
- Upper central secondary incisor tooth · digestive
- Upper lateral secondary incisor tooth · digestive
- Genioglossus · muscular
References
- Foundational Model of Anatomy: Lower central secondary incisor tooth (FMA57143). EMBL-EBI Ontology Lookup Service.
- OpenStax. Anatomy and Physiology 2e, §23.1 Overview of the Digestive System. Rice University, 2022.
- Mitsuhashi N. et al. (2009). BodyParts3D: 3D structure database for anatomical concepts. Nucleic Acids Research 37, D782–D785. Data © The Database Center for Life Science, CC BY 4.0.
Related anatomy
Explore the whole body in the interactive 3D human anatomy model, or browse the A–Z list of human structures.