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Viva Question and Answers Related to Development and Growth of Teeth

Here are 50 viva questions and answers related to the development and growth of teeth:

  1. What is odontogenesis?
    • Answer: Odontogenesis refers to the process of tooth development.
  2. Which germ layer gives rise to the dental tissues?
    • Answer: The dental tissues originate from the ectoderm.
  3. Define tooth bud.
    • Answer: A tooth bud is an early stage of tooth development, representing a localized thickening of the dental epithelium.
  4. Name the two main types of tooth development stages.
    • Answer: The two main types are primary (deciduous) dentition and permanent dentition.
  5. What is enamel organ?
    • Answer: Enamel organ is a group of cells that gives rise to enamel during tooth development.
  6. Which tissue forms the bulk of the tooth and gives it its hardness?
    • Answer: Dentin forms the bulk of the tooth and contributes to its hardness.
  7. What is the role of ameloblasts in tooth development?
    • Answer: Ameloblasts are responsible for the formation of enamel during tooth development.
  8. Define dental papilla.
    • Answer: Dental papilla is a group of cells within the tooth germ that gives rise to dentin and pulp.
  9. Which tooth type is commonly known as baby teeth or milk teeth?
    • Answer: Deciduous teeth are commonly known as baby teeth or milk teeth.
  10. When does tooth eruption typically begin in humans?
  11. Explain the term succedaneous teeth.
    • Answer: Succedaneous teeth are permanent teeth that replace primary (deciduous) teeth.
  12. What is the function of cementum in teeth?
    • Answer: Cementum anchors teeth to the alveolar bone through the periodontal ligament.
  13. Name the four types of teeth in permanent dentition.
    • Answer: Incisors, canines, premolars, and molars.
  14. What is the function of the periodontal ligament?
    • Answer: The periodontal ligament attaches the tooth to the alveolar bone and provides support during chewing.
  15. Define tooth eruption.
    • Answer: Tooth eruption is the process by which a tooth moves from its developmental position within the jaw to its functional position in the oral cavity.
  16. What role do Hertwig’s epithelial root sheath cells play in tooth development?
    • Answer: Hertwig’s epithelial root sheath cells guide the formation of the tooth root.
  17. Explain the term anodontia.
    • Answer: Anodontia is the congenital absence of teeth.
  18. What are the three stages of tooth eruption?
    • Answer: Pre-eruptive, eruptive, and post-eruptive stages.
  19. What is the dental lamina?
    • Answer: The dental lamina is a band of epithelial tissue that gives rise to tooth buds.
  20. How does tooth enamel differ from dentin in terms of composition?
  21. What causes tooth resorption, and what are its types?
    • Answer: Tooth resorption can be caused by inflammation, trauma, or unknown factors. Types include internal and external resorption.
  22. Explain the term cusp in relation to teeth.
    • Answer: A cusp is a pointed or rounded elevation on the chewing surface of a tooth.
  23. What is the role of the dental follicle in tooth development?
    • Answer: The dental follicle surrounds the developing tooth germ and contributes to the formation of periodontal tissues.
  24. What is the significance of the ameloclasts in enamel formation?
    • Answer: Ameloclasts are responsible for the removal of organic material during enamel maturation, contributing to its hardness.
  25. Define the term ankylosis in relation to teeth.
    • Answer: Ankylosis is the fusion of the tooth root with the alveolar bone, preventing normal tooth eruption.
  26. What are the functions of saliva in dental health?
    • Answer: Saliva helps in lubrication, buffering, remineralization, and antibacterial activity in maintaining dental health.
  27. Explain the concept of heterodont dentition.
    • Answer: Heterodont dentition refers to having different types of teeth with specific functions in the oral cavity.
  28. What is the function of the pulp chamber in a tooth?
    • Answer: The pulp chamber contains blood vessels and nerves, providing nourishment and sensation to the tooth.
  29. Define the term polyphyodont.
    • Answer: Polyphyodont refers to the ability to continuously replace teeth throughout life, common in many non-mammalian vertebrates.
  30. What causes malocclusion, and how can it be corrected?
  31. Describe the process of tooth mineralization.
    • Answer: Tooth mineralization is the deposition of minerals (mainly hydroxyapatite) within the dental tissues, leading to hardening.
  32. What is the role of the gubernaculum in tooth development?
    • Answer: The gubernaculum guides the eruption of teeth by connecting the developing tooth to the oral mucosa.
  33. What is the dental sac, and what is its function?
    • Answer: The dental sac is a part of the dental follicle that forms the periodontal ligament and cementum, aiding in tooth attachment.
  34. Explain the term hypodontia.
    • Answer: Hypodontia is the congenital absence of one or more teeth.
  35. What are the implications of enamel hypoplasia?
  36. How does the eruption pattern differ between primary and permanent dentition?
    • Answer: Primary teeth usually erupt earlier and follow a different sequence than permanent teeth.
  37. Define the term eruption cyst.
    • Answer: An eruption cyst is a fluid-filled sac that may appear over the crown of an erupting tooth.
  38. What is the role of the dental pulp in tooth function?
    • Answer: The dental pulp provides sensory functions, blood supply, and reparative capabilities to the tooth.
  39. Explain the concept of anodontia.
    • Answer: Anodontia refers to the absence of all teeth, either deciduous or permanent.
  40. What are the consequences of delayed tooth eruption?
  41. Describe the process of root resorption in primary teeth.
    • Answer: Root resorption in primary teeth is a natural process where the roots gradually break down to allow for the shedding of deciduous teeth.
  42. What is the significance of the enamel cuticle (enamel tuft)?
    • Answer: The enamel cuticle is a thin layer covering the enamel and plays a role in enamel maturation and mineralization.
  43. Explain the term supernumerary teeth.
    • Answer: Supernumerary teeth are extra teeth that exceed the normal dental formula.
  44. What is the function of the dental enamel pulp horns?
    • Answer: Dental enamel pulp horns are extensions of the pulp chamber into the cusps, providing space for nerves and blood vessels.
  45. Define the term dentinoenamel junction (DEJ).
    • Answer: The dentinoenamel junction is the boundary between the dentin and enamel in a tooth.
  46. How does the eruption of permanent molars differ from other teeth?
    • Answer: Permanent molars erupt behind the primary molars without replacing any primary teeth.
  47. Explain the concept of enamel prism.
    • Answer: Enamel prisms are microscopic structures in enamel formed by the alignment of enamel rods.
  48. What is the role of the dental lamina in tooth development?
    • Answer: The dental lamina gives rise to tooth buds and is crucial for the initiation of tooth development.
  49. What factors influence tooth size and shape during development?
    • Answer: Genetic factors, environmental factors, and interactions between dental tissues influence tooth size and shape.
  50. Discuss the importance of proper oral hygiene in maintaining dental health.



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