Tooth Identification Quiz

1. You are comparing the lingual surfaces of permanent incisors. One crown has a relatively pronounced marginal-ridge outline, a deeper lingual fossa and a greater tendency to show a lingual pit. Which tooth is it most likely to be?

2. Which permanent tooth is generally the most bilaterally symmetrical when viewed from the facial or lingual surface?

3. A maxillary molar has a reduced or absent distolingual cusp, giving its occlusal outline a heart-like appearance. Among the following, which is the best identification?

4. In the Universal Numbering System for permanent teeth, which tooth is number 8?

5. Compared with the adjacent first premolar, a specimen has a more rounded occlusal outline, more nearly equal buccal and lingual cusps, more supplemental grooves and usually one root. Which tooth is it?

6. On an occlusal view, a molar shows a rhomboidal outline and an oblique ridge running between the mesiolingual and distobuccal cusps. Which tooth is the best match?

7. A molar has a marked cervical bulge, a strongly constricted crown at the neck and widely flared roots that leave space for a developing successor. What type of tooth is this?

8. Which permanent tooth usually has the longest root in the human dentition?

9. In the FDI two-digit notation system, which tooth is numbered 36?

10. A premolar has a large functional buccal cusp, a very small lingual cusp and a mesiolingual developmental groove. Which tooth is it?

11. An incisor has a narrow crown and a distolingual twist of the incisal edge, helping the crown follow the curvature of the mandibular arch. Which tooth is the best match?

12. A premolar shows a mesial marginal groove, a distinct mesial crown-and-root concavity and two roots. Which tooth is most strongly indicated?

13. A permanent molar has four relatively even cusps, a rectangular occlusal outline and grooves forming a cross-shaped pattern. Which tooth is most likely?

14. An occlusal view reveals one buccal cusp, two lingual cusps and a Y-shaped groove pattern. Which tooth is the best match?

15. A permanent molar has five cusps, including a small distal cusp, and two roots. Which tooth is the best identification?

16. An extracted permanent incisor has a broad mesiodistal crown, a relatively straight incisal edge, a sharper mesioincisal angle and a more rounded distoincisal angle. Which tooth is the best match?