Left Upper Second Secondary Premolar Tooth (Dens premolaris secundus maxillaris sinister)
Educational content only — not medical advice.
Anatomy
The left upper second secondary premolar tooth (FDI #25, Universal #13) lies between the first premolar and first permanent molar in the maxilla. Presenting with two nearly equal-sized cusps (buccal and palatal) and a single tapering root, its occlusal table features more supplemental grooves than the first premolar, aiding in grinding food during mastication.
Clinical notes
The root apex of the upper second premolar closely approximates the floor of the maxillary sinus, meaning periapical abscesses can perforate the Schneiderian membrane and produce odontogenic maxillary sinusitis.
Related structures
Educational references
FAQ
What is the role of the Left Upper Second Secondary Premolar Tooth?
The left upper second secondary premolar tooth (FDI #25, Universal #13) lies between the first premolar and first permanent molar in the maxilla. Presenting with two nearly equal-sized cusps (buccal and palatal) and a single tapering root, its occlusal table features more supplemental grooves than the first premolar, aiding in grinding food during mastication.
Why is the Left Upper Second Secondary Premolar Tooth clinically important?
The root apex of the upper second premolar closely approximates the floor of the maxillary sinus, meaning periapical abscesses can perforate the Schneiderian membrane and produce odontogenic maxillary sinusitis.
Source & license
BodyParts3D, © The Database Center for Life Science licensed under CC Attribution 4.0 International (https://creativecommons.org/licenses/by/4.0/). license details