Questions and Answers
Which type of cross-section is primarily associated with the cervical area of the lower central incisor?
What is the average length of a lower lateral incisor?
What percentage of lower canines typically consist of one canal?
Which curvature is the most common for the lower central incisor?
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How many pulp horns does the lower central incisor typically have?
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What is the average length of the Upper Central Incisor?
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Which type of curvature has the highest percentage for the Upper Lateral Incisor?
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What percentage of Upper Lateral Incisors have a lateral canal?
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Which of the following criteria is NOT associated with the Upper Canine?
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In terms of root canal anatomy, which tooth has the highest average canal width?
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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.
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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.
