Back to Access Cavities
MandibularTriangular
Mandibular Lateral Incisor
Mandibular Lateral Incisor - Axial View showing oval access cavity
Average Length21.1 mm
Root Development10 years
Universal #23, 26
FDI #32, 42
Access Cavity Design
ShapeTriangular/Oval
OrientationBuccolingual
Entry PointLingual surface, just above cingulum
Canal Anatomy
Configurations
Single canal60-75%
Two canals (buccal + lingual)25-40%
Canal Positions
BBuccal Canal
Easier to locate
LLingual Canal25-40%
Located beneath cingulum
Clinical Tips
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Tip
Same anatomy as central incisor - second canal in 25-40%
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Technique
SLOB Rule: Same Lingual, Opposite Buccal for canal identification
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Technique
Pre-curve small files (#10, #15) and explore along buccal and lingual walls