Left Upper First Secondary Molar Tooth (Dens molaris primus maxillaris sinister)
Educational content only — not medical advice.
Anatomy
The left upper first secondary molar tooth (FDI #26, Universal #14), commonly termed the 6-year molar, is the largest tooth in the maxillary arch. Featuring a rhomboidal occlusal table with four major cusps and often a supplemental cusp of Carabelli on the mesiopalatal cusp, it is anchored by three divergent roots (palatal, mesiobuccal, and distobuccal). It acts as the anchor tooth of human dental occlusion.
Clinical notes
As the earliest permanent tooth to erupt behind the primary dentition without replacing a precursor, it is highly prone to deep occlusal caries; its mesiobuccal root frequently contains a second canal (MB2) challenging endodontic therapy.
Related structures
Educational references
FAQ
What is the role of the Left Upper First Secondary Molar Tooth?
The left upper first secondary molar tooth (FDI #26, Universal #14), commonly termed the 6-year molar, is the largest tooth in the maxillary arch. Featuring a rhomboidal occlusal table with four major cusps and often a supplemental cusp of Carabelli on the mesiopalatal cusp, it is anchored by three divergent roots (palatal, mesiobuccal, and distobuccal). It acts as the anchor tooth of human dental occlusion.
Why is the Left Upper First Secondary Molar Tooth clinically important?
As the earliest permanent tooth to erupt behind the primary dentition without replacing a precursor, it is highly prone to deep occlusal caries; its mesiobuccal root frequently contains a second canal (MB2) challenging endodontic therapy.
Source & license
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