Dental Anatomy: Upper Incisors and Canine

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@JawDroppingPolarBear

Study Notes

Upper Central Incisor

Average length is 22.5 mm (range: 21 – 25.6 mm).
Predominantly has one canal (99.4%), with a 0.6% chance of a second canal and 24% lateral canals.
Curvature details:
- Straight: 75%
- Distally curved: 8%
- Mesially curved: 4%
- Labial: 9%
- Lingual: 4%
Pulp chamber is centrally located with three pulp horns (mamelons), wider mesiodistally.
Root canal has one main canal; 24% have lateral canals near the apical region, with various curvature types.

Upper Lateral Incisor

Average length is 21 mm (range: 20.5 – 25.1 mm).
One canal present in 93.4% of cases, with 6.6% having a second canal and 10% with lateral canals.
Curvature details:
- Straight: 30%
- Distally curved: 53%
- Mesially curved: 3%
- Labial: 4%
- Bayonet: 6%
Pulp chamber located centrally with two pulp horns, larger than that of the lower central incisor.
Root canal is finer than upper central incisor, wider labiolingually.

Upper Canine

Largest in the upper arch with an average length of 26.5 mm (range: 23.1 – 28.9 mm).
Predominantly has one canal (96.5%), with a 3.5% chance of a second canal (buccal-lingual) and 24% lateral canals.
Curvature details:
- Straight: 39%
- Distally curved: 32%
- Labial: 13%
- Lingual: 7%
- Bayonet: 7%
Triangular pulp chamber, centrally located with one pulp horn, wider labiolingually.

Lower Central Incisor

Smallest tooth with an average length of 21.5 mm (range: 19.6 – 23.4 mm).
One canal present in 73%, occasionally two canals are found (26% with one foramen, 6.5% with two foramina).
Curvature details:
- Straight labial canal: 60%
- Distal curve: 23%
- No mesial curves or lingual curves.
- Labial curve: 13%
Pulp chamber located centrally with three pulp horns.

Lower Lateral Incisor

Average length is 22.4 mm (range: 20.2 – 24.6 mm).
One canal present in 56.9% of cases, with variations including up to 29.4% with two canals.
Curvature details:
- Straight labial canal: 60%
- Distal curve: 23%
- Mesial curve: 0%
- Labial curve: 13%
Pulp chamber is similar to the lower central incisor but larger.

Lower Canine

Average length is 25.2 mm (range: 22.9 – 27.5 mm), similar to the upper canine but smaller.
Predominantly has one canal (94%), with a 6% chance of a second canal and 9.5% lateral canals.
Curvature details:
- Straight labial canal: 68%
- Distal curve: 20%
- Mesial curve: 1%
- Lingual curve: 0%
- Bayonet: 2%
Pulp chamber is centrally located with one pulp horn.

Description

Explore the fascinating dimensions and canal structures of upper central incisors, lateral incisors, and canines in this quiz. Understand average lengths and the prevalence of canal types for each tooth. Test your knowledge on dental anatomy and tooth structure.