1. What are teeth?
Hard, mineralized structures anchored in the alveolar processes of the maxilla and mandible, primarily involved in mastication.
2. What are the three main anatomical regions of a tooth?
The crown, neck, and root.
3. What is the anatomical crown of a tooth?
The portion covered by enamel, extending from the cementoenamel junction to the occlusal or incisal surface.
4. What is the root of a tooth?
The cementum-covered portion embedded within the alveolar socket of the jaw.
5. What is the cementoenamel junction?
The anatomical boundary between the enamel covering the crown and the cementum covering the root.
6. What are the four principal tissues of a tooth?
Enamel, dentin, cementum, and dental pulp.
7. What is enamel?
The highly mineralized outer covering of the anatomical crown and the hardest tissue in the human body.
8. Which cells produce enamel during tooth development?
Ameloblasts, derived from the inner enamel epithelium of the enamel organ.
9. What is dentin?
A mineralized tissue forming the bulk of the tooth beneath enamel and cementum, surrounding the pulp cavity.
10. Which cells produce dentin?
Odontoblasts, whose cell bodies line the outer surface of the dental pulp.
11. What is cementum?
A mineralized connective tissue covering the tooth root and providing attachment for periodontal ligament fibers.
12. What does the dental pulp contain?
Loose connective tissue containing blood vessels, nerves, odontoblasts, and other cells.
13. What is the apical foramen?
An opening near the root apex through which blood vessels and nerves enter or leave the dental pulp.
14. What is the periodontal ligament?
A specialized fibrous connective tissue connecting the tooth root cementum to the surrounding alveolar bone.
15. What type of joint attaches a tooth to its alveolar socket?
A gomphosis, a specialized fibrous joint supported by the periodontal ligament.
16. What are the four types of teeth in permanent human dentition?
Incisors, canines, premolars, and molars.
17. What is the primary function of the incisor teeth?
Cutting and biting food using their chisel-shaped incisal edges.
18. What distinguishes canine teeth anatomically?
They typically have a single prominent cusp and a long, strong root adapted for piercing and tearing food.
19. What is the main function of premolar teeth?
Crushing and grinding food, usually with two principal cusps on the occlusal surface.
20. What structural feature makes molars well suited for grinding?
Their broad occlusal surfaces with multiple cusps.
21. How many teeth are normally present in the complete primary dentition?
20 teeth, consisting of eight incisors, four canines, and eight molars.
22. How many teeth are normally present in the complete permanent dentition?
32 teeth, including the four third molars.
23. What is the dental formula for permanent human dentition in each quadrant?
Two incisors, one canine, two premolars, and three molars (2-1-2-3).
24. What is the dental formula for primary human dentition in each quadrant?
Two incisors, one canine, and two molars (2-1-0-2), with no premolars.
25. Which cranial nerve supplies general sensation to the teeth?
The trigeminal nerve (cranial nerve V), through its maxillary and mandibular divisions.
26. Which nerves provide sensory innervation to the maxillary teeth?
The anterior, middle when present, and posterior superior alveolar nerves, associated with the maxillary nerve (V2).
27. Which nerve provides sensory innervation to the mandibular teeth?
The inferior alveolar nerve, a branch of the mandibular nerve (V3).
28. Which arteries primarily supply the maxillary teeth?
The superior alveolar arteries, arising from the maxillary and infraorbital arteries.
29. Which artery supplies the mandibular teeth?
The inferior alveolar artery, a branch of the maxillary artery.
30. Which embryological tissues give rise to enamel, dentin, and dental pulp?
Enamel develops from oral ectoderm, while dentin and dental pulp develop from neural crest-derived ectomesenchyme of the dental papilla.
