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. Where is the dental papilla originally derived from?
The outer enamel epithelium - the inner enamel epithelium - the stellate reticulum - and the stratum intermedium
Hereditary - endocrine dysfunction - systemic disease - excess radiation exposure
The ectomesenchyme - which was influenced by the neural crest cells
Compressed layer of flat to cuboidal cells

2. After the enamel apposition ceases the crown area of each primary or permanent tooth what happens?
The ameloblasts place an acellular dental cuticle on the new enamel surface
The enamel organ is compressed
The ectomesenchyme
Dental papilla

3. What are the formative cells for alveolar bone?
Osteoblasts
Odontoblasts
The ectoderm
Hereditary in localized form. endocrine dysfunction is complete

4. What is the time span for the cap stage?
9th to 10th weeks
Ameloblasts
Dental papilla
Absence of single or multiple teeth

5. 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

6. What do the odontoblasts do?
Development of one or more extra teeth
Dentin and alveolar bone
The apposition of the enamel matrix
Dentinogenesis - Which is the apposition of dentin matrix - or predentin - on the other side of the basement membrane

7. What happens when the reduced enamel epithelium is created?
Abnormally small teeth
The primary tooth can now erupt into the oral cavity - the REE fuses with the oral epithelium - then enzymes from the REE disintegrate the central portion of the epithelial tissue leaving an epithelial tunnel for the tooth to erupt
Dental papilla
Oral epithelium

8. What is the cementum matrix called?
The outer enamel epithelium - the inner enamel epithelium - the stellate reticulum - and the stratum intermedium
As a result of the apposition of cementum over dentin
Commonly affects the permanent maxillary lateral incisor. tooth may have deep lingual pit and need endodontic therapy
Cementoid

9. What are succedaneous teeth?
Permanent teeth formed with primary predecessors - the anterior teeth and the premolars
Traumatic injury or crowding of teeth
Ameloblasts
Hereditary in localized form. endocrine dysfunction is complete

10. What processes are involved with the apposition stage?
Induction
Induction - proliferation
Compressed layer of flat to cuboidal cells
Connective

11. What will the dental sac give rise to?
Dental follicle
Cementocytes
The cementum - PDL - and alveolar bone
The tooth germ

12. What are the etiological factors for supernumerary teeth?
Hereditary
There is unequal growth in different parts of the tooth bud
Ameloblasts
The dental sac

13. What are the incremental lines for dentin?
Differentiation
Imbrication lines of von Ebner
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
Hereditary in localized form. endocrine dysfunction is complete

14. What conveys communications between the cells of the enamel organ - the dental papilla - and the dental sac allowing tissue interactions?
Bud stage
The basement membrane
May cause disruption of occlusion and aesthetic problems - may need partial or full dentures - bridges - and/or implants
Epithelial

15. What are the developmental disturbances of the cap stage?
The primary tooth can now erupt into the oral cavity - the REE fuses with the oral epithelium - then enzymes from the REE disintegrate the central portion of the epithelial tissue leaving an epithelial tunnel for the tooth to erupt
After the crown is completely shaped and the tooth is starting to erupt into the oral cavity
Differentiation of enamel organ into bell with four cell types and dental papilla into two cell types.
Dens in dente - gemination - tubercle - and fusion

16. What is concrescence?
Epithelial
Union of root structure of two or more teeth by cementum
Hereditary in localized form. endocrine dysfunction is complete
Tooth germ tries to divide

17. When the inner epithelial epithelium columnar cells elongate and repolarize they differentiate into what?
The basement membrane that seperates the enamel organ and dental papilla
Maturation
Preameloblasts
Extra cusp due to effects on enamel organ

18. What is the time span for initiation?
Only dentinal tubules with processes
The permanent molars
6th to 7th weeks
The enamel organ

19. What are entrapped cementoblasts called?
Dental follicle
Cementocytes
The ectomesenchyme
Odontoblastic process

20. When root formation is completed the portion of the basement membrane disintegrates its cells may become what?
Epithelial rests of Malassez
Odontoblasts
Odontoclasts
The basement membrane

21. When does macro/microdontia occur?
The tooth germ
Osteocytes
The basement membrane
Bud stage

22. What happens during the appositional stage?
Tooth germ tries to divide
May be confused as calculus deposit on root
The enamel - dentin - and cementum are secreted in successive layers
The ameloblasts place an acellular dental cuticle on the new enamel surface

23. What is the important acelluar structure that seperates the oral epithelium and the ectomesenchyme?
Hereditary in localized form. endocrine dysfunction is complete
The basement membrane
There is unequal growth in different parts of the tooth bud
Odontoblasts

24. What hard tissue is can not have tissue formation after eruption?
Differentiation
Pressure on the area
The ectomesenchyme
Enamel

25. The buds of the dental lamina - together with the surrounding ecto mesenchyme - will develop into what?
Hereditary
Maturation
Tooth germ
The ameloblasts place an acellular dental cuticle on the new enamel surface

26. What is the time span for the bud stage?
During the cap stage
Bud stage
As a result of the apposition of cementum over dentin
8th week

27. Passive eruption
Local or systemic or hereditary
When the gingiva recedes and no actual tooth movement takes place
The primary tooth can now erupt into the oral cavity - the REE fuses with the oral epithelium - then enzymes from the REE disintegrate the central portion of the epithelial tissue leaving an epithelial tunnel for the tooth to erupt
The primordium of the pulp

28. Odontoblasts leave attached cellular extensions in the length of the predentin called what?
The successional dental lamina - an extension of the dental lamina that extends out lingually to the primary tooth germs
The basement membrane
Cuboidal cells
Odontoblastic process

29. What cell bodies are involved in the eruption and mineralization process but will be lost after eruption?
Lines of Retzuis
Induction
The ameloblasts
Maturation

30. What processes are involved in the bell stage?
The disintegration of the basement membrane allows the preameloblasts to come into contact with the newly formed predentin
Hereditary - endocrine dysfunction - systemic disease - excess radiation exposure
Enamel
Differentiation - proliferation - morphogenesis

31. What happens during the apposition stage?
The ameloblasts place an acellular dental cuticle on the new enamel surface
Odontogenesis
Dental tissues secreted as matrix in successive layers.
Large tooth with two pulp cavities. one fewer tooth in dentition. may cause problems in appearance and spacing

32. The stellate reticulum is located inner or outer?
Cementoblasts
Initiation
Outer
The cementum - PDL - and alveolar bone

33. What is matrix?
During the cap stage
The outer cells of the dental papilla and the central cells of the dental papilla
An extracellular substance that is partially calcified - yet serves as a framework for later calcification
Maturation

34. What is the predominate process in the bell stage?
Initiation stage
Tooth germ
A mineralized cylinder - the dentinal tubule
Differentiation

35. What is tubercle?
The actual vertical movement of the tooth
Connective
Oral epithelium
Extra cusp due to effects on enamel organ

36. What is the time span for the bell stage?
A bilayer rim that consists only IEE and OEE
11th to 12th weeks
Pressure on the area
Yes - this is why the dentin is thicker in the mature tooth structure than the enamel

37. Where does the primordium of the permanent dentition develop?
Commonly involves permanent maxillary lateral incisor and 3rd molars
Cuboidal cells
The successional dental lamina - an extension of the dental lamina that extends out lingually to the primary tooth germs
Faulty development of enamel from interference involving ameloblasts

38. What are the clinical ramifications of supernumerary teeth?
Yes - this is why the dentin is thicker in the mature tooth structure than the enamel
Occurs commonly between the maxillary centrals - distal to the 3rd molars and premolar region. may cause crowding - failureof normal eruption and disruption of occlusion
Proliferation
Enamel pearl - enamel dysplasia - and concresence

39. Active eruption
May be confused as calculus deposit on root
The actual vertical movement of the tooth
The ectoderm
The enamel organ - dental papilla - dental sac

40. What kind of cells reside in the stratum intermediate?
Compressed layer of flat to cuboidal cells
The enamel - dentin - and cementum are secreted in successive layers
The enamel organ
The basement membrane

41. The preameloblasts induce dental papilla cells to differentiate into what?
Dental papilla
Hereditary
Union of root structure of two or more teeth by cementum
Into odontoblasts

42. When does dens in dente occur?
Ameloblasts
During the cap stage
The dental sac
Hereditary

43. What are the etiological factors for enamel pearl?
9th to 10th weeks
Displacement of ameloblasts to root surface
Development of one or more extra teeth
Traumatic injury or crowding of teeth

44. What is gemination?
The enamel organ
Tooth germ tries to divide
8th week
The outer enamel epithelium

45. What is anodontia?
Absence of single or multiple teeth
Cementocytes
8th week
The outer cells of the dental papilla and the central cells of the dental papilla

46. What happens during the bell stage?
The cervical loop
The disintegration of the basement membrane allows the preameloblasts to come into contact with the newly formed predentin
Differentiation of enamel organ into bell with four cell types and dental papilla into two cell types.
There are none - they are lost with eruption

47. What is fusion?
Union of 2 adjacent tooth germs
Dental papilla
Proliferation
Abnormally small teeth

48. What are the etiological factors for anodontia?
Cementocytes
Compressed layer of flat to cuboidal cells
Commonly involves permanent maxillary lateral incisor and 3rd molars
Hereditary - endocrine dysfunction - systemic disease - excess radiation exposure

49. What are the processes involved in the cap stage?
Cementoblasts
Faulty development of enamel from interference involving ameloblasts
Proliferation - differentiation - morphogenesis
Cementoblasts

50. What is the structure responsible for root development?
The cervical loop
The tooth germ
Trauma - pressure or metabolic disease
The ameloblasts place an acellular dental cuticle on the new enamel surface