Left Upper Central Secondary Incisor Tooth (Dens incisivus centralis maxillaris sinister)
Educational content only — not medical advice.
Anatomy
The left upper central secondary incisor tooth (FDI #21, Universal #9) is a prominent anterior permanent tooth anchored within the incisive fossa of the maxilla. Featuring a broad, spade-shaped crown with a straight incisal edge and a single stout conical root, it is the most visible tooth in the dental arch. It functions primarily in biting, shearing food boluses, and guiding speech articulation and lip support.
Clinical notes
The upper central incisor is the tooth most frequently fractured or avulsed in pediatric facial trauma; endodontic preservation and aesthetic restoration are critical for speech and smile line harmony.
Related structures
Educational references
FAQ
What is the role of the Left Upper Central Secondary Incisor Tooth?
The left upper central secondary incisor tooth (FDI #21, Universal #9) is a prominent anterior permanent tooth anchored within the incisive fossa of the maxilla. Featuring a broad, spade-shaped crown with a straight incisal edge and a single stout conical root, it is the most visible tooth in the dental arch. It functions primarily in biting, shearing food boluses, and guiding speech articulation and lip support.
Why is the Left Upper Central Secondary Incisor Tooth clinically important?
The upper central incisor is the tooth most frequently fractured or avulsed in pediatric facial trauma; endodontic preservation and aesthetic restoration are critical for speech and smile line harmony.
Source & license
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