Final Written Examination BHD ORLA 312 December 14, 2000

Biology of the Human Dentition (Source for each question shown in parenthesis)

1. In contrast to maxillary canine crowns, mandibular canine crowns have which of the following anatomically? (nb113)

A. well defined lingual pits

B. less pronounced cingula

C. more accentuated marginal ridges

D. greater measurements mesiodistally and faciolingually

2. Below, please make the appropriate entries for the deciduous dentition dental formula. (wk1)

(Note: all nine entries must be correct for credit)

I ------ C------ M ----- =

3. The drawing to the right illustrates a cross section at the cementoenamel junction. This section is typical of which of the following teeth?(nb135)

A. maxillary first premolar

B. mandibular second premolar

C. maxillary molar

D. mandibular molar

4. One of your teen-age patients has brought in a strange animal for you to identify. Upon examination, you find that it has teeth specialized into regional classes and it has several sets of teeth in its lifetime. What two terms best describe its dentition? (wk1/1)

A. homodont, anodont

B. heterodont, diphyodont

C. heterodont, polyphyodont

D. homodont, monophyodont

5. Below, write the Universal Notation Numbers for both permanent canines that have the cusp tip in line with the long axis of the tooth. (wk5/3)

__________ __________

6. You are looking at a tooth with a HEART SHAPED OCCLUSAL SURFACE. Question: what is the CUSP ORDER from largest cusp to smallest cusp? (11/2)





7. Which of the following is correct regarding the contact relationship of maxillary central incisors and maxillary lateral incisors? (nb106)

A. contacts are centered faciolingually

B. contacts are centered incisocervically

C. facial embrasures are wider than lingual embrasures.

D. incisal embrasures are larger than gingival embrasures

8. Examine the drawing to the right. It is the mesial aspect of a lower first molar. Question: The spaces that radiate out facially, occlusally, and lingually are embrasures. What is the space called gingival to the contact? (text)

9. Which of the following is characteristic of primary maxillary canines? (nb137)

A. crown height is less than the mesiodistal width

B. cusp is low and rounded

C. the mesioincisal cusp ridge is shorter than the distoincisal cusp ridge

D. the mesioincisal cusp ridge is longer than the distoincisal cusp ridge

10. A person aged 70 years will have spent most of his/her chewing career with permanent teeth and only ____________ with deciduous teeth. (wk1/1)

A. 3%

B. 6%

C. 10%

D. 15%

11. The outline shown here of a pulp cavity indicates that this tooth probably (nb143)

A. has three distinct cusps

B. has experienced trauma

C. is that of an old person

D. is that of a young person

12. A _______ is a smaller elevation on some portion of the crown produced by an extra formation of enamel. (Select the BEST answer) (textp9)

A. mamelon

B. cusp

C. tubercle

D. ridge

13. The developmental absence of teeth is called (wk1/1)


14. A transverse ridge is the union of two ______________________ ___________________ crossing transversely across the surface of a posterior tooth. (wk1/4)

15. Mandibular first premolars, when viewed from the occlusal, have a _________________ outline/shape. (Dr. K) wk13

16. The condition of having two sets of teeth during one's lifetime is called (wk1/1) ___________________________

17. Which one of the teeth listed below is usually the smallest? (Circle one) wk2

A. #23 B. #22 C. #25 D. #27 E. #7

18. Abused children come from (wk7DrH)

A. upper class families

B. working class families

C. economically deprived families

D. all socio-economic, ethnic and cultural backgrounds

19. An extra tooth in the dental arch is called-what kind of tooth? wk4/1 _______________________

20. What is your favorite after-exam pig out snack food? ________________

21. In the upper dental arch there are two teeth whose mesial surfaces are in contact wk1

with each other. What is the number notation of those teeth? think

__________ and __________

22. Which of the following normally describes the general crown form of canines when viewed from the facial or lingual aspect? (nb181}

A. 3 sided

B. 4 sided

C. 5-sided

D. 6-sided

23. The fundamental morphologic unit of enamel is the ___________________________________ (wk3/1)

24. The highest and sharpest cusp on the lower first deciduous molar is what cusp? (13.7/4)

A. mesiobuccal cusp

B. distobuccal cusp

C. mesiolingual cusp

D. distolingual cusp

25. Select which one of the following teeth is the first succedaneous tooth

to erupt into the mouth. (wk5)

A. maxillary central incisor

B. mandibular central incisor

C. mandibular first molar

D. maxillary first premolar

26. The root of a deciduous tooth is usually fully formed in just about _____________ (wk13/2)

A. three years

B. two years

C. six months

D. one year

27. Which of the following deciduous teeth LEAST resembles any other tooth

in either dentition? (wk13)

A. #S

B. #B

C. #K

D. #A

28. What is alternation? Select from the possibilities below. 10.4

A. each lower tooth relates to the upper tooth of its own number (type) and the one toward the distal

B. each lower tooth relates to the upper tooth of its own number (type) and the one mesial

C. each upper tooth relates to the lower tooth of its own number (type) and the one mesial

D. each upper tooth relates to only the lower tooth of its own number (type)

29. The cross-sectional view at midroot illustrated here is MOST probably that of a (nb116)

A. mandibular canine

B. mandibular first molar

C. maxillary first premolar

D. distal root of a mandibular first molar

30. The translucent dentin in teeth of older persons that you saw when sectioning teeth is called _____________dentin. (wk3/2)

31. Acellular cementum is adjacent to what tissue? (wk3/3)

A. periodontal ligament

B. dentin

C. bone

32. The groove between the free gingiva and the attached gingiva is called the (wk3/4)

A. mucogingival groove.

B. attached gingiva groove

C. free gingival groove

D. mucosal groove

33. What deciduous teeth don't resemble any other tooth in either dentition? (wk13)

_________ __________ (Give the appropriate letter notation for both right & left)

34. During formation of enamel, about how many days of formation are represented by each perikymata groove? (Circle one) (wk10/2)

A. 3 days

B. 5 days

C. 8 days

D. 11 days

35. Select the "factory tooth" from the various teeth shown below (wk10/2)

A. #A

B. #17

C. #3

D. #18

36. The Butler Field Theory was devised to explain (wk10)

A. anodontia.

B. polyphyodonty

C. heterodonty

D. monophyodonty

37. How many ridges form the boundary of a maxillary first premolar? (wk8)

A. 2

B. 4

C. 6

D. 8

38. What tooth in the right side of the mouth has a mesial lingual developmental groove? (wk8/4)

______________ (give the proper notation number)

39. The term mesiodens correlates best with which term below? (wk9/2)

A. macrodontia

B. microdontia

C. taurodontia

D. polydontia

40. An ___________ tooth is one that has failed to erupt. (wk9/2)

41. Which premolar MOST likely possess a crescent-shaped central developmental groove? (nb160)

A. maxillary first

B. mandibular first

C. maxillary second

D. mandibular second

42. Mandibular third molars, when viewed from the occlusal have a/an __________ outline/shape. (DrK)

A. rhomboid

B. rectangular

C. ovoid

D. square

43. You are looking at a set of dental casts from the lateral aspect. You see the anterior-posterior linear curvature formed by the occlusal surfaces of the teeth. What is that curvature called? (Wk4/6) ______________

44 What tooth listed below is most likely to have imbrication lines? (2.7/14)

A. #14

B. #8

C. #27

D. #17

45. You have just seen a patient who has NO TEETH because she just had them all extracted two weeks ago. What is the term that describes not having any teeth

present in the mouth? (wk3/4) ______________

46. How much is the LEEWAY SPACE in just the lower arch? (wk4/5)

A. 0.9 mm

B. 1.8 mm

C. 3.4 mm

D. 4.8 mm

47. The most important feature of attractiveness according to animal studies is (wk6/1)

A. size

B. age

C. symmetry

D. weight

48. The longest root on the maxillary first permanent molar is the (11.2/3)

a. mesial buccal

b. lingual (palatal)

c. distal buccal

d. distal

49. Your favorite pizza topping is _____________________________________________

50. What incisor has a groove on the lingual surface that continues down onto the root that is called the linguogingival groove? (2.7/15)

_______________ (use a Universal Notation Number, either side ok)

51. The cervical ridge is found on what surface of the lower first permanent molar? (11.2/1)

a. facial

b. occlusal

c. lingual

d. mesial

52. What tooth in the permanent dentition has a mesial developmental depression? (Wk8p5)

____________ (use a Universal Notation Number, either side ok)

53. Look over this list of teeth. Which one is the most important to preserve in order to prevent

mesial migration of the lower right first permanent molar in a nine year old child? (wk13)

A. #B

B. #I

C. #L

D. #T

54. Hutchinson's incisors are caused by what infectious congenital disease? (wk9/5) __________________

55. Concrescence is most likely to occur associated with (wk9/5)

A. gemination

B. fusion

C. hypercementosis

D. dilaceration

56. Which of the following incisal angles of maxillary teeth exhibits the greatest convexity? (nb102)

A. mesioincisal of the central

B. distoincisal of the central

C. mesioincisal of the lateral

D. distoincisal of the lateral

57. Which deciduous tooth is most likely to resemble the succedaneous tooth that replaces it? (13.5/3)

_______________ (specify by letter; either side is ok)

58. You are examining a normal, average child aged 6 ½ years. How many deciduous and how many permanent teeth would you expect to see? (13.5/6)

A. 18 deciduous, six permanent

B. 16 deciduous, eight permanent

C. 18 deciduous, eight permanent

D. 14 deciduous, eight permanent

59. Listed below are five characteristics of deciduous teeth. One is incorrect. Circle that one. (deciduous handout)

A. their enamel is thinner and whiter in appearance

B. the roots of deciduous molars are slender and flare greatly

C. the enamel rods incline apically near the cervical line

D. the roots of deciduous anteriors are long and narrow

E. deciduous teeth are constricted at the neck

60. Maxillary second premolars, when viewed from the occlusal, have an ______ outline/shape. (Dr. Kwk13)

Here are two "extra points" question in case you are one point away from the next higher grade level. We urge you to do them. IF you are one point away from the next higher grade level AND you get them correct, we will give you the points and boost your grade!

001. At age nine years of age, how many primary teeth remain in the mouth? (nb150)

A. 0

B. 4

C. 8

D. 12

E. 16

002. Each of the following cusps of the maxillary molars is part of the maxillary molar primary cusp triangle EXCEPT one. Which is the EXCEPTION? (nb104)

A. mesiofacial

B. mesiolingual

C. distofacial

D. distolingual

Well, good and kind people, this wraps it up. The four of us, Drs. Krawczak, Luksha, Kolar, and Johnson wish you well for the Holidays and your career in dentistry.

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