Left Upper First Secondary Premolar Tooth (Dens premolaris primus maxillaris sinister)
Educational content only — not medical advice.
Anatomy
The left upper first secondary premolar tooth (FDI #24, Universal #12) is positioned immediately posterior to the canine in the maxillary dental arch. Characterized by a bicuspid occlusal table with a prominent buccal cusp and a smaller palatal cusp, it characteristically possesses two roots (buccal and palatal) in over half of individuals, as well as a distinct mesial crown concavity. It tears and crushes food boluses.
Clinical notes
The deep developmental groove and mesial crown concavity make this tooth prone to severe plaque stagnation and challenging to scale; multiple root canals require careful multi-orifice endodontic negotiation.
Related structures
Educational references
FAQ
What is the role of the Left Upper First Secondary Premolar Tooth?
The left upper first secondary premolar tooth (FDI #24, Universal #12) is positioned immediately posterior to the canine in the maxillary dental arch. Characterized by a bicuspid occlusal table with a prominent buccal cusp and a smaller palatal cusp, it characteristically possesses two roots (buccal and palatal) in over half of individuals, as well as a distinct mesial crown concavity. It tears and crushes food boluses.
Why is the Left Upper First Secondary Premolar Tooth clinically important?
The deep developmental groove and mesial crown concavity make this tooth prone to severe plaque stagnation and challenging to scale; multiple root canals require careful multi-orifice endodontic negotiation.
Source & license
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