Back to Access Cavities
MaxillaryTriangular
Maxillary Central Incisor
Maxillary Central Incisor - Axial View showing triangular access cavity
Average Length22.5 mm
Root Development10 years
Universal #8, 9
FDI #11, 21
Access Cavity Design
ShapeTriangular/Round
OrientationParallel to long axis
Entry PointCenter of palatal surface, just above cingulum
DimensionsM-D: 1.54 mmB-L: 1.51 mm
Canal Anatomy
Configurations
Single canal100%
Canal Positions
MCMain Canal
Central, conical, rapidly tapering toward apex
Clinical Tips
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Tip
Extend access incisally to expose all pulp horns - prevents discoloration
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Tip
Pulp chamber is shallow - minimal 'drop-in' feeling expected
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Tip
More than 1/3 of canal is directly visible - ideal for beginners
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Warning
Accessory and lateral canals common (40-50%)