Permanent Maxillary Central Incisor (3D Morphology)
Channel: Air Tutor
Date: 2020-07-29

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They Erupts around the age of 7-8 years with its root being completely formed by the age of 10 years 
In nearly all maxillary central incisors, there is one root canal with one apex
These are the largest incisors with the primary function of shearing and cutting

we will look at the morphology from different viewing aspects:

1 - Labial - This view considers the portion of the tooth visible from the side where the lips would be. from this viewing aspect we can observer 

- a Stright incisal edge 
- a Cervical line with an even curvature towards the root
- Distal side has a curved outline 
- Mesial side has a relatively straight outline 
- Mesio-incisal line angle which is sharp (Near 90 degrees)
- disto-incisal line angle is rounded
- The root is cone shaped, apex is blunted and inclines slightly distally 


2 - number two considers the Palatal viewing aspect of the tooth - This is the portion of the tooth visible from the side where the tongue would be. from this viewing aspect we can observer 

- a small convexity called the cingulum and a large concavity called the lingual fossa. 
- along the mesial and distal sides are slightly raised portions called marginal ridges. 


3 - and finally number three considers the Mesial and distal viewing aspects of the tooth.  from a mesial direction we can observe the portion of the tooth visible from the side closest to where the middle line of the face would be  & from a Distal direction we can observe the portion of the tooth visible from the side furthest from where the middle line of the face would be) from this viewing aspect we can observer 

- that the crown looks wedge shaped 
- A line drawn through the crown and the root will bisect the incisal ridge and the apex of the root 
- the Cervical line curves in the incisal direction (less curved distally) this is another key point to help you distinguish between the left and right maxillary central incisor  
- the curve is more incisally placed relative to the palatal and labial cervical lines 

The images featured in this video were courtesy of the University of Dundee, School of Dentistry. 
LINKS:
https://sketchfab.com/3d-models/maxillary-left-central-incisor-c8a7c2d9280d4c92bc651cfa1459866a 
https://sketchfab.com/DundeeDental/collections/dundee-tooth-morphology


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