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Dentistry Tooth Development And Eruption

Instructions:
  • Answer 50 questions in 15 minutes.
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  • Match each statement with the correct term.
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This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. What is the structure responsible for root development?






2. Where does the primordium of the permanent dentition develop?






3. The stage named for extensive proliferation of the dental lamina into oval masses penetrating into the ectomesenchyme?






4. What are the 2 layers in the dental papilla within the concavity of the enamel organ?






5. What conveys communications between the cells of the enamel organ - the dental papilla - and the dental sac allowing tissue interactions?






6. The preameloblasts induce dental papilla cells to differentiate into what?






7. What cell bodies are involved in the eruption and mineralization process but will be lost after eruption?






8. What are supernumerary teeth?






9. What are the clinical ramifications of fusion?






10. What are the etiological factors for enamel pearl?






11. When root formation is completed the portion of the basement membrane disintegrates its cells may become what?






12. What hard tissue is innervated by nerves?






13. What is another name for the dental sac?






14. Where is the enamal organ originally derived from?






15. The oral epithelium is induced by the ectomesenchyme to produce what?






16. What are the incremental lines for dentin?






17. What happens during the maturation stage?






18. What is enamel dysplasia?






19. What are the formative cells for dentin?






20. What are the etiological factors for fusion?






21. What is cementogenisis?






22. What is the time span for the cap stage?






23. After the enamel apposition ceases the crown area of each primary or permanent tooth what happens?






24. What is dens in dente?






25. What are the etiological factors for dens in dente and gemination?






26. Where is the dental sac originally derived from?






27. What are the etiological factors for micro/macrodontia?






28. What is the time span for the bud stage?






29. What is microdontia?






30. How is the dentinocemental junction formed?






31. When the inner epithelial epithelium columnar cells elongate and repolarize they differentiate into what?






32. What is an enamel pearl?






33. What wll the inner enamel epithelium differentiate into?






34. When does dens in dente occur?






35. What happens to the thickened non tooth producing portions of the dental lamina eventually?






36. What are the mature cells for cementum?






37. What happens during initiation?






38. What processes are involved in the bell stage?






39. What is the main process involved in initiation?






40. What are the cell layers found in the enamel organ in the bell stage?






41. What are the processes involved in the cap stage?






42. What stage does supernumerary teeth occur?






43. What are succedaneous teeth?






44. What are the formative cells for enamel?






45. What are the clinical ramifications of enamel dysplasia?






46. Active eruption






47. What stage does the dental tissues subsequently fully mineralize






48. What is concrescence?






49. What is the embryological background for dentin - cementum and alveolar bone?






50. What happens during the appositional stage?







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