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. Active eruption
The actual vertical movement of the tooth
Odontoblasts
Union of 2 adjacent tooth germs
Dentin secreting cells (odontoblats)

2. What is enamel dysplasia?
The bud stage
Permanent teeth formed with primary predecessors - the anterior teeth and the premolars
Dental tissues secreted as matrix in successive layers.
Faulty development of enamel from interference involving ameloblasts

3. What are the incremental lines for cementum and alveolar bone?
Odontoblastic process
May be confused as calculus deposit on root
The outer enamel epithelium - the inner enamel epithelium - the stellate reticulum - and the stratum intermedium
Arrest and reversal lines

4. What are the clinical ramifications of supernumerary teeth?
Occurs commonly between the maxillary centrals - distal to the 3rd molars and premolar region. may cause crowding - failureof normal eruption and disruption of occlusion
Odontoblasts
The cervical loop
When the gingiva recedes and no actual tooth movement takes place

5. When does dens in dente occur?
The enamel - dentin - and cementum are secreted in successive layers
The ectomesenchyme
An extracellular substance that is partially calcified - yet serves as a framework for later calcification
During the cap stage

6. What kind of cells occur in the inner enamel epithelium?
Tall columnar cells
Compressed layer of flat to cuboidal cells
A bilayer rim that consists only IEE and OEE
Connective

7. What are the 2 layers in the dental papilla within the concavity of the enamel organ?
The outer cells of the dental papilla and the central cells of the dental papilla
After the crown is completely shaped and the tooth is starting to erupt into the oral cavity
Differentiation
The bud stage

8. What are the clinical ramifications of fusion?
Odontoblastic process
The dental lamina
Large tooth with two pulp cavities. one fewer tooth in dentition. may cause problems in appearance and spacing
Maturation

9. What is the predominate process of the cap stage?
Lines of Retzuis
Morphogenesis
Tooth germ tries to divide
Growth of the dental lamina into bud that penetrates growing ectomesenchyme

10. What are the incremental lines for dentin?
Imbrication lines of von Ebner
Connective
Growth of the dental lamina into bud that penetrates growing ectomesenchyme
Odontoblasts

11. What is the site for the future dentioenamel junction?
The enamel organ - dental papilla - dental sac
The primordium of the pulp
The enamel - dentin - and cementum are secreted in successive layers
The basement membrane that seperates the enamel organ and dental papilla

12. When does the tooth bud become a tooth germ?
Local or systemic or hereditary
In the cap stage
Trauma - pressure or metabolic disease
The enamel organ - dental papilla - dental sac

13. The stellate reticulum is located inner or outer?
Pressure on the area
Growth of the dental lamina into bud that penetrates growing ectomesenchyme
Outer
Differentiation of enamel organ into bell with four cell types and dental papilla into two cell types.

14. What processes are involved in the bell stage?
9th to 10th weeks
Differentiation - proliferation - morphogenesis
The basement membrane
Into odontoblasts

15. What is the embryological background for enamel?
Enamel organ
Tooth germ
The cementum - PDL - and alveolar bone
Odontoclasts

16. What hard tissue is innervated by nerves?
Dentin and alveolar bone
9th to 10th weeks
Odontogenesis
Hereditary - endocrine dysfunction - systemic disease - excess radiation exposure

17. What does the cervical loop consist of?
A bilayer rim that consists only IEE and OEE
Outer
The ameloblasts place an acellular dental cuticle on the new enamel surface
Tall columnar cells

18. What are the clinical ramifications of concrescence?
9th to 10th weeks
Tooth germ tries to divide
The actual vertical movement of the tooth
Common with permanent maxillary molars

19. What is the main process involved in initiation?
May cause disruption of occlusion and aesthetic problems - may need partial or full dentures - bridges - and/or implants
The outer enamel epithelium - the inner enamel epithelium - the stellate reticulum - and the stratum intermedium
Into odontoblasts
Induction

20. 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

21. What is the structure responsible for root development?
The cervical loop
Dentin and alveolar bone
Inner
Tooth germ

22. What are the mature cells for dentin?
Only dentinal tubules with processes
Osteoblasts
The basement membrane that seperates the enamel organ and dental papilla
Dentin and alveolar bone

23. What else undergoes proliferation in the bud stage besides the dental lamina?
After the crown is completely shaped and the tooth is starting to erupt into the oral cavity
Abnormally small teeth
Dental tissues fully mineralize to their mature levels.
The ectomesenchyme

24. When does macro/microdontia occur?
Imbrication lines of von Ebner
A mineralized cylinder - the dentinal tubule
Bud stage
The bud stage

25. What is another name for the dental sac?
The outer enamel epithelium
Abnormally small teeth
Oral epithelium
Dental follicle

26. What happens to the thickened non tooth producing portions of the dental lamina eventually?
Induction - proliferation
The stellate reticulum
Common with permanent maxillary molars
It disintegrates as the developing oral mucosa comes to line the oral cavity

27. What is the process involved in the maturation stage?
Maturation
Dental papilla
Dentin secreting cells (odontoblats)
Proliferation

28. What will the inner cells of the dental lamina differentiates into?
Only dentinal tubules with processes
The disintegration of the basement membrane allows the preameloblasts to come into contact with the newly formed predentin
The primordium of the pulp
Large tooth with two pulp cavities. one fewer tooth in dentition. may cause problems in appearance and spacing

29. What are the clinical ramifications of dens in dente?
During the cap stage
After the crown is completely shaped and the tooth is starting to erupt into the oral cavity
Absence of single or multiple teeth
Commonly affects the permanent maxillary lateral incisor. tooth may have deep lingual pit and need endodontic therapy

30. What happens during the cap stage?
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.
Into odontoblasts
Absence of single or multiple teeth
11th to 12th weeks

31. What is the function of the Hertwig's epithelial root sheath?
A mineralized cylinder - the dentinal tubule
Osteocytes
The primordium of the pulp
To shape the root (or roots) and induce dentin formation in the root area so that it is continuous with coronal dentin

32. What is the important acelluar structure that seperates the oral epithelium and the ectomesenchyme?
The Tomes' process - a tapered portion of each ameloblast that faces the disintegrating basement membrane
The ameloblasts place an acellular dental cuticle on the new enamel surface
Hereditary
The basement membrane

33. What will the outer cells of the dental lamina differentiate into?
Compressed layer of flat to cuboidal cells
Large tooth with two pulp cavities. one fewer tooth in dentition. may cause problems in appearance and spacing
Dentin secreting cells (odontoblats)
Cementoid

34. What kind of cells reside in the stratum intermediate?
Inner
Compressed layer of flat to cuboidal cells
Connective
The enamel - dentin - and cementum are secreted in successive layers

35. Which teeth are nonsuccedaneous?
Dentin secreting cells (odontoblats)
The cementum - PDL - and alveolar bone
The permanent molars
Cementoid

36. What happens during the appositional stage?
The enamel - dentin - and cementum are secreted in successive layers
The basement membrane
Large single rooted tooth with one pulp cavity and exhibits 'twinning' in crown area. normal number of teeth in dentition. may cause problems in appearance and spacing
Cementocytes

37. What are the development disturbances of the apposition and maturation stages?
Odontoblastic process
Enamel pearl - enamel dysplasia - and concresence
Preameloblasts
Compressed layer of flat to cuboidal cells

38. 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
Development of one or more extra teeth
The enamel organ
Common on permanent molars or cingulum of anterior teeth

39. What are the etiological factors for fusion?
Odontogenesis
Sphere of enamel on root
Tooth germ
Pressure on the area

40. What is the time span for the bud stage?
Initiation stage
8th week
Epithelial rests of Malassez
Oral epithelium

41. How is the reduced enamel epithelium created?
The enamel organ is compressed
Sphere of enamel on root
The basement membrane
Cementoblasts

42. What are the mature cells for alveolar bone?
Osteocytes
Future dentin and pulp tissue
Odontoblasts
Large single rooted tooth with one pulp cavity and exhibits 'twinning' in crown area. normal number of teeth in dentition. may cause problems in appearance and spacing

43. What are the etiological factors of tubercle?
Trauma - pressure or metabolic disease
Abnormally large teeth
Displacement of ameloblasts to root surface
Enamel pearl - enamel dysplasia - and concresence

44. What is an enamel pearl?
Connective
Enamel organ
The bud stage
Sphere of enamel on root

45. What is the primordium of the tooth?
Tooth germ
Enamel secreting cells (ameloblasts)
May be confused as calculus deposit on root
The tooth germ

46. What happens during the bud stage?
Growth of the dental lamina into bud that penetrates growing ectomesenchyme
Union of root structure of two or more teeth by cementum
Pressure on the area
Dental tissues secreted as matrix in successive layers.

47. What are the major components of the tooth germ?
It disintegrates as the developing oral mucosa comes to line the oral cavity
Dental papilla
Dentinogenesis - Which is the apposition of dentin matrix - or predentin - on the other side of the basement membrane
The enamel organ - dental papilla - dental sac

48. What are the mature cells for cementum?
Tall columnar cells
Cementocytes
Dentin and alveolar bone
Inner

49. What are the processes involved in the cap stage?
Initiation stage
Proliferation - differentiation - morphogenesis
Pitting or intrinsic color changes in enamel. changes in thickness of enamel possible. problems in function and aesthetics
Occurs commonly between the maxillary centrals - distal to the 3rd molars and premolar region. may cause crowding - failureof normal eruption and disruption of occlusion

50. What are supernumerary teeth?
Development of one or more extra teeth
The apposition of the enamel matrix
The basement membrane
Displacement of ameloblasts to root surface