Test your basic knowledge |

Dentistry Tooth Development And Eruption

Subjects : health-sciences, dentistry

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

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 are the clinical ramifications of anodontia?
Proliferation
May be confused as calculus deposit on root
May cause disruption of occlusion and aesthetic problems - may need partial or full dentures - bridges - and/or implants
Apposition of the cementum

2. Where is the enamel matrix secreted from by the ameloblasts?

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183

3. The stage named for extensive proliferation of the dental lamina into oval masses penetrating into the ectomesenchyme?
Occurs commonly between the maxillary centrals - distal to the 3rd molars and premolar region. may cause crowding - failureof normal eruption and disruption of occlusion
The bud stage
Morphogenesis
The ameloblasts

4. What is the predominate process in the bell stage?
The disintegration of the basement membrane allows the preameloblasts to come into contact with the newly formed predentin
Trauma - pressure or metabolic disease
Faulty development of enamel from interference involving ameloblasts
Differentiation

5. What is fusion?
The enamel organ is compressed
Union of 2 adjacent tooth germs
Proliferation
The ectomesenchyme

6. What are the formative cells for enamel?
Outer
Cementoblasts
Tall columnar cells
Ameloblasts

7. What is matrix?
The basement membrane
An extracellular substance that is partially calcified - yet serves as a framework for later calcification
Odontoblastic process
Permanent teeth formed with primary predecessors - the anterior teeth and the premolars

8. What is the main process involved in the bud stage?
Proliferation
Pressure on the area
Alveolar bone
Future dentin and pulp tissue

9. What is the primordium of the tooth?
The tooth germ
Enamel organ invaginates into the dental papilla
Yes - this is why the dentin is thicker in the mature tooth structure than the enamel
Cementocytes

10. What hard tissue has vascularity?
The ectoderm
Yes - this is why the dentin is thicker in the mature tooth structure than the enamel
Large tooth with two pulp cavities. one fewer tooth in dentition. may cause problems in appearance and spacing
Alveolar bone

11. What are the etiological factors for fusion?
Pressure on the area
Ameloblasts
The cementum - PDL - and alveolar bone
Into odontoblasts

12. Odontoblasts leave attached cellular extensions in the length of the predentin called what?
Differentiation of enamel organ into bell with four cell types and dental papilla into two cell types.
The dental sac
Odontoblastic process
There are none - they are lost with eruption

13. What happens during the cap stage?
The outer enamel epithelium - the inner enamel epithelium - the stellate reticulum - and the stratum intermedium
Enamel organ forms into cap - surrounding mass of dental papilla from the ectomesenchyme and surrounded by mass of dental sac also from the ectomesenchyme. Formation of the tooth germ.
Tooth germ
To shape the root (or roots) and induce dentin formation in the root area so that it is continuous with coronal dentin

14. Where is the dental papilla originally derived from?
Dental papilla
The ectomesenchyme - which was influenced by the neural crest cells
The dental lamina
Hereditary

15. What are the clinical ramifications of fusion?
Large tooth with two pulp cavities. one fewer tooth in dentition. may cause problems in appearance and spacing
Abnormally large teeth
Morphogenesis
There are none - they are lost with eruption

16. What are the major components of the tooth germ?
Enamel pearl - enamel dysplasia - and concresence
Differentiation - proliferation - morphogenesis
The enamel organ - dental papilla - dental sac
Hereditary

17. What stage does the dental tissues subsequently fully mineralize
Maturation
Dental follicle
The dental lamina
Bud stage

18. How is the reduced enamel epithelium created?
The enamel organ is compressed
The dental sac
The outer cells of the dental papilla and the central cells of the dental papilla
Tooth germ tries to divide

19. What is the outer portion of the ectoderm in the initiation stage?
Dental papilla
Local or systemic or hereditary
Oral epithelium
Lines of Retzuis

20. What causes the induction of the preameloblasts to differentiate into ameloblasts?
The disintegration of the basement membrane allows the preameloblasts to come into contact with the newly formed predentin
The outer cells of the dental papilla and the central cells of the dental papilla
The ectomesenchyme
The enamel organ

21. What are the clinical ramifications of enamel pearl?
Enamel pearl - enamel dysplasia - and concresence
Induction - proliferation
May be confused as calculus deposit on root
Permanent teeth formed with primary predecessors - the anterior teeth and the premolars

22. What stage does anodontia occur?
The permanent molars
The Tomes' process - a tapered portion of each ameloblast that faces the disintegrating basement membrane
Initiation stage
The enamel - dentin - and cementum are secreted in successive layers

23. What do the odontoblasts do?
Dentinogenesis - Which is the apposition of dentin matrix - or predentin - on the other side of the basement membrane
The ectomesenchyme
Extra cusp due to effects on enamel organ
The stellate reticulum

24. What is the important acelluar structure that seperates the oral epithelium and the ectomesenchyme?
The dental lamina
The basement membrane
The enamel organ
An extracellular substance that is partially calcified - yet serves as a framework for later calcification

25. What are the mature cells for enamel?
Osteocytes
There are none - they are lost with eruption
The dental lamina
Dens in dente - gemination - tubercle - and fusion

26. What is enamel dysplasia?
Dental papilla
Tooth germ tries to divide
Faulty development of enamel from interference involving ameloblasts
Differentiation

27. What is the site for the future dentioenamel junction?
Induction
The basement membrane that seperates the enamel organ and dental papilla
Development of one or more extra teeth
The ectomesenchyme

28. What is the process involved in the maturation stage?
Maturation
Arrest and reversal lines
Differentiation
The basement membrane that seperates the enamel organ and dental papilla

29. What type of tissue is enamel?
Differentiation of enamel organ into bell with four cell types and dental papilla into two cell types.
Dental follicle
Epithelial
The basement membrane

30. What are supernumerary teeth?
Union of 2 adjacent tooth germs
Development of one or more extra teeth
Ameloblasts
The primordium of the pulp

31. What kind of cells occur in the inner enamel epithelium?
Enamel organ forms into cap - surrounding mass of dental papilla from the ectomesenchyme and surrounded by mass of dental sac also from the ectomesenchyme. Formation of the tooth germ.
The tooth germ
Ectoderm lining stomodeum gives rise to the oral epithelium and then to the dental lamina - adjacent to deeper ectomesenchyme - Which is influenced by the neural crest cells. Both tissues are seperated by a basement membrane
Tall columnar cells

32. The buds of the dental lamina - together with the surrounding ecto mesenchyme - will develop into what?
The tooth germ
Common with permanent maxillary molars
Tooth germ
Only dentinal tubules with processes

33. What will the dental sac give rise to?
Yes - this is why the dentin is thicker in the mature tooth structure than the enamel
The cementum - PDL - and alveolar bone
Hereditary
Commonly involves permanent maxillary lateral incisor and 3rd molars

34. What processes are involved with the apposition stage?
Induction - proliferation
Only dentinal tubules with processes
Cementocytes
Abnormally small teeth

35. What stage does supernumerary teeth occur?
The cervical loop
Bud stage
Hereditary in localized form. endocrine dysfunction is complete
Initiation

36. What are the clinical ramifications of gemination?

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183

37. What is the predominate process of the cap stage?
Dental follicle
After the crown is completely shaped and the tooth is starting to erupt into the oral cavity
Morphogenesis
Common with permanent maxillary molars

38. What are the formative cells for cementum?
Commonly affects the permanent maxillary lateral incisor. tooth may have deep lingual pit and need endodontic therapy
Tall columnar cells
Cementoblasts
6th to 7th weeks

39. What are the formative cells for dentin?
The dental sac
As a result of the apposition of cementum over dentin
Odontoblasts
Hereditary

40. Passive eruption
Enamel organ invaginates into the dental papilla
When the gingiva recedes and no actual tooth movement takes place
Maturation
Proliferation - differentiation - morphogenesis

41. What are the etiological factors for enamel pearl?
The ameloblasts place an acellular dental cuticle on the new enamel surface
Cementoblasts
Bud stage
Displacement of ameloblasts to root surface

42. When root formation is completed the portion of the basement membrane disintegrates its cells may become what?
Bud stage
Epithelial rests of Malassez
The successional dental lamina - an extension of the dental lamina that extends out lingually to the primary tooth germs
Dental follicle

43. What cell bodies are involved in the eruption and mineralization process but will be lost after eruption?
Dental papilla
The ameloblasts
Faulty development of enamel from interference involving ameloblasts
4 types

44. What are the odontoblastic processes is contained in what?
Cementoblasts
Union of root structure of two or more teeth by cementum
Odontoclasts
A mineralized cylinder - the dentinal tubule

45. What are the etiological factors for dens in dente and gemination?
Hereditary
The dental lamina
Inner
The Tomes' process - a tapered portion of each ameloblast that faces the disintegrating basement membrane

46. What is the cementum matrix called?
Hereditary - endocrine dysfunction - systemic disease - excess radiation exposure
Epithelial
Cementoid
Sphere of enamel on root

47. What is amelogenisis?
Future dentin and pulp tissue
The apposition of the enamel matrix
Common with permanent maxillary molars
Maturation

48. What are the mature cells for dentin?
The outer cells of the dental papilla and the central cells of the dental papilla
Only dentinal tubules with processes
Displacement of ameloblasts to root surface
9th to 10th weeks

49. What are the etiological factors of tubercle?
Only dentinal tubules with processes
Yes - this is why the dentin is thicker in the mature tooth structure than the enamel
The basement membrane
Trauma - pressure or metabolic disease

50. How many types of cells are found in the enamel organ in the bell stage?
Arrest and reversal lines
The ectomesenchyme - which was influenced by the neural crest cells
Future dentin and pulp tissue
4 types