Notation
- Deciduous mandibular central incisors are designated by uppercase letters in the universal system of notation.
- The right deciduous mandibular central incisor is known as P.
- The left deciduous mandibular central incisor is known as O.
- In the international notation, the right deciduous mandibular central incisor is known as 81.
- The left deciduous mandibular central incisor is known as 71.
- In the universal system of notation, permanent mandibular central incisors are designated by numbers.
- The right permanent mandibular central incisor is known as 25.
- The left permanent mandibular central incisor is known as 24.
- In the Palmer notation, a number is used in conjunction with a symbol designating the quadrant.
- Both central incisors have the number 1, but the right one has the symbol ┐, while the left one has ┌.
- In the international notation, the right permanent mandibular central incisor is known as 41, and the left one is known as 31.
Anatomy
- The central incisors have fossa on their lingual surfaces.
- The mesial and distal proximal contacts are located in the incisal third.
- The facial and lingual heights of contour are in the cervical third.
- This is consistent with all incisors and canines.
- The central incisors do not have cusps.
Appearance and Function
- The mandibular central incisor is located on the jaw, adjacent to the midline of the face.
- Its function includes shearing or cutting food during mastication.
- The tooth does not have cusps but has an incisal ridge or incisal edge.
- The deciduous mandibular central incisor has incisal ridges that give it a serrated appearance.
- The permanent mandibular central incisors are usually the first teeth to appear in the mouth, around 6-8 months of age.
References
- Ash, Major M. and Stanley J. Nelson, 2003.
- Wheelers Dental Anatomy, Physiology, and Occlusion.
- 8th edition.
This article relies largely or entirely on a single source. (December 2021) |
The mandibular central incisor is the tooth located on the jaw, adjacent to the midline of the face. It is mesial (toward the midline of the face) from both mandibular lateral incisors. As with all incisors, its function includes shearing or cutting food during mastication, commonly known as chewing. There are no cusps on the tooth. Instead, the surface area of the tooth used in eating is called an incisal ridge or incisal edge. Though the two are similar, there are some minor differences between the deciduous (baby) mandibular central incisor and that of the permanent mandibular central incisor. The mandibular central incisors are usually the first teeth to appear in the mouth, typically around the age of 6–8 months.
| Mandibular central incisor | |
|---|---|
 Mandibular central incisors of permanent and primary teeth marked in red. | |
 The deciduous mandibular central incisors in a 7-month-old infant. Note the incisal ridges which give the teeth a serrated appearance. | |
| Identifiers | |
| FMA | 290182 |
| Anatomical terminology | |
