Biology of the Human Dentition 1999 Final Written Examination
December 16, 1999 (Source is in parentheses) saved as bhd_finalexam_1999
1. (Wk1) Examine the Universal Notations for teeth listed here. Which one IS a succedaneous tooth?
A. 31
B. 18
C. 3
D. 29
E. 15
2. (Wk1p1) The condition of having distinctive classes of teeth that are regionally specialized is called
___________________________ Write the word clearly
3. (Wk1p1) Humans (and many mammals including your dog or cat) have two generations of teeth.
This condition is called
____________________________
4. (Wk1p1) Carefully write the DENTAL FORMULA for the DECIDUOUS DENTITION.
For credit on this one, all nine correct entries are necessary.
I ------ C ------ M ------ =
5. (NB105) Which of the following incisors has its mesial and distal contact areas at the same incisocervical level?
A. Mandibular lateral
B. Maxillary lateral
C. Mandibular central
D. Maxillary central
6. (Wk1p2) The CLINICAL ROOT is best defined as the portion of the tooth
A. covered with cementum.
B. actually embedded in the jaw.
C. incisal or occlusal to the epithelial attachment.
D. attached to the free gingiva.
7. (WK1p4) Imagine that you are looking at the occlusal surface of any of the premolars.
Question: please name each the various TYPES of RIDGES that you would find on premolar
occlusal surfaces. (Do NOT distinguish between mesial/distal or buccal/lingual. More
lines than necessary may have been provided.)
________________________________
________________________________
________________________________
________________________________
________________________________
8. (WK1p5) Examine the drawing shown to the right (drawing of proximal surface of lower first permanent molar with contact area shown)
What is the name of the space formed gingival (apical) to the contact area when two proximal surfaces of adjacent teeth are in contact?
_________________ _________________
9. (NB111) Calcification of the mandibular third molars generally begins at
A. 3 - 4 years.
B. 5 - 7 years
C. 8 - 10 years
D. 11 - 13 years.
E. 14 - 16 years.
10. (P2.8/26) What is the geometric form of the anterior teeth when they are viewed from the proximal (mesial or distal) aspect?
A. rhomboid
B. trapezoid
C. square
D. triangular
E. polytetrahedron
11. (P2.7/5) Upon what surface do you find marginal ridges in incisor teeth?
___________________ (Name the surface.)
12. (AWtextp11) A LOBE best correlates with which one of these landmarks?
A. marginal ridges
B. roots
C. root canals
D. fossa and sulcus
E. cusps and mamelons
13. (P2.7/3) Which of the following teeth is MOST LIKELY to have a lingual pit?
A. 23
B. 11
C. 9
D. 7
E. 25
14. (NB129) Which of the following represents the normal eruption age (years) of the maxillary lateral incisors?
A. 4 - 5 years
B. 6 - 7 years
C. 8 - 9 years
D. 10 - 11 years
15. (Wk11,12,13) From your knowledge of eruption dates, please answer this question:
In a person who experiences normal eruption and exfoliation dates, how many years would the SECOND DECIDUOUS MOLAR and FIRST PERMANENT MOLAR be in contact with each other?
A. 1 - 2 years
B. 3 - 5 years
C. 6 - 7 years
D. eight years
E. twelve years
16. (Wk3p1) The Incremental Line of Retzius that forms at the time of birth is called.....what?
____________________________________ P3
17. (Wk3p1)What is the name of the cell that forms enamel?
_________________________________
18. (Wk3) In older persons, the dentinal tubules begin to calcify
and produce a distinctive transparent dentin that
is seen when teeth are sectioned in the laboratory.
You probably saw it when you did your dissections.
What is that type of dentin called?
__________________________________
19. (Wk3p2) The primary function of the pulp is
A. to form dentin.
B. nutritive.
C. sensory.
D. protective.
E. dysplasia.
20. (NB174) The lingual cusp(s) on which of the following mandibular posterior teeth is (are)
approximately 2/3 the height of the respective facial cusp(s)?
A. third molar
B. second molar
C. first molar
D. second premolar
E. first premolar
21. (Wk4p1)You are examining your first patient of the day in the Diagnosis Department. Much to your surprise, she has two upper right lateral incisors. Such an extra tooth is called a
___________________________ . (Print neatly please.)
22. (Wk4p5) How much is the leeway space in the lower dental arch?
______._______ mm
23. (Wk4p6) What is the term that describes the tendency of permanent posterior teeth to migrate mesially in the dental arch. Hint: It compensates for proximal tooth wear.______________________ ____________________ __________________.
24. What is your favorite pizza?
____________________________________
25. (NB130) Which of the following maxillary teeth has the largest cervico-occlusal crown height?
A. third molar
B. second molar
C. first molar
D. second premolar
E. first premolar
26. (Wk5p1) Which one of the following teeth is MOST LIKELY to have a CUSP?
A. 24
B. 6
C. 10
D. 26
E. 9
27. (WK5p2) Imagine the lingual surface of a maxillary permanent canine. Question: what is
the name of the feature on the lingual surface that extends from the cusp tip on down to
the cingulum of the tooth. Hint: It divides the mesial lingual fossa from the distal lingual
fossa.
__________________ __________________ (Write in BOTH names of the feature.)
28. (NB109) In (at) which of the following is the mesial contact area of a maxillary canine located?
A. the junction of the middle and cervical thirds
B. the middle third
C. the junction of the incisal and middle thirds
D. the incisal third
E. between the bumper and the headlight
29. (P5.4/13) On the crown of the maxillary canine, WHAT LOBE includes the cusp tip?
A. mesial facial lobe
B. middle facial lobe
C. distal facial lobe
D. lingual lobe
E. occlusomedial lobe
30. (P5.4/1) Examine the list of teeth shown below. Which one is MOST LIKELY to have a bifurcated root?
A. 8
B. 11
C. 26
D 27
E. 6
(Hint: read next one very carefully!)
31. (Wk4p2) The PRIMATE SPACES occur between what teeth in the upper dental arch of
which dentition (deciduous or permanent)? ((write in both teeth and choose dentition below))
______________________ and _____________________ + CIRCLE deciduous or permanent
32 (Wk5) When maxillary and mandibular permanent canines (in the same mouth) are compared, which one of the following statements is TRUE?
A. Upper canines erupt before lower canines.
B. The mesial aspect of the crown and root of upper canines form a nearly straight line, when viewed from the labial.
C. An upper canines has a less pronounced cingulum than a lower canine..
D. In lower canines, the mesial cusp ridge is longer than the distal cusp ridges.
E. The crown of the upper canine is narrower mesiodistally than that of the lower canine.
33. (Wk7) Abused children come from
A. primarily immigrant populations.
B. the homes of the homeless..
C. parental employment..
D. all socioeconomic, ethnic and cultural backgrounds.
E. a lack of upbringing in a mainstream religion.
34. (Wk7) Name the type of cell that lines the pulp chamber and is responsible for the formation of reparative dentin:
______________________________ (Please neatly print the name.)
35. (Wk3p14>5/19) What is the basic (anatomical) unit of tooth enamel?
______________________ _______ (Both words necessary for credit)
36. (Wk7NB184) In a cervical cross section, which premolar(s) sometimes exhibit a root outline and a pulp chamber floor outline that are both kidney-shaped?
A. All premolars
B. Mandibular second
C. Maxillary second
D. Mandibular first
E. Maxillary first.
37. (Wk8p4) There is a depression found on the maxillary first premolar. What is that depression called?
______________________________________________________
(Any of three answers will do)
38. (NB194) On the crowns of maxillary premolars, the height of contour is normally located in the cervical third on which of the following surfaces?
A. Distal
B. Mesial
C. Lingual
D. Facial
E. Occlusal
39. (8.4/8)Which premolar has the smallest lingual cusp relative to its buccal cusp?
(For credit, write in the correct number notation of both right and left. Don't use anatomical names.)
____________ ___________
40. (8.4/6) When examining a lower first premolar, which marginal ridge is highest occlusally?
A. Mesial
B. Distal
C. Buccal
D. Lingual
41. (Wk9p2) The term that describes the congenital absence of teeth is ____________________________________
42. (Wk9p2) The condition of having extra teeth is called
____________________________________
43. (Wk9p3) What is an iatrogenic disease? ____________________________________
44. (Wk9p5) In a case of gemination of a lower incisor in an otherwise normal dentition, how many lower incisors would you expect to find?
____________ (Please enter a single digit.)
45. (WK9p4) Shovel-shaped incisors are most likely found in
A. Australian Aborigines
B. Northern Europeans
C. Asians
D. Africans (south of the Sahara)
E. Hebrews
46. (14.5/18) How many cingula are there in the adult dentition?
____________ (Please enter a number)
47. (Wk10p2) The actual mechanisms of tooth eruption are poorly understood.
A. True
B. False P7
48. (Wk10p1) You are examining a patient with
Question: what is the likely age of this patient? Circle your choice
A. 6 - 7 years
B. 8 - 9 (even possibly 10) years of age
C. 11 - 12 years
D. 15 years of age
E. 18 years of age
49. (Wk10p3) The British researcher Butler devised his "concept of the morphogenetic field" or as it is sometimes called, "Butler's field theory"...........to explain what question?
A. Why are there two generations of teeth?
B. Why is the dentition divided into regional classes?
C. Why are teeth sometimes missing or peculiarly shaped?
D. Why do teeth have cusps?
E. Why does pizza use tomato sauce?
50. (Wk10p7) Name a paramasticatory function of teeth. (Do NOT mention speech or esthetics in your answer)
__________________________________
51. (NB162) Which of the following molars MOST frequently have only three cusps?
A. Mandibular first molar
B. Mandibular third molar
C. Maxillary first molar
D. Maxillary third molar
52. (Wk7;11.2/7) Which ROOT CANAL in the lower first permanent molar is the biggest?
A. Mesial
B. Mesial buccal
C. Distal buccal
D. Distal
53. (Wk11,12) When tooth #16 is heart-shaped, which cusp is the smallest-or even absent?
A. Mesiobuccal
B. Mesiolingual
C. Distobuccal
D. Distolingual
E. Distal
54. (Wk13) On what tooth, other than upper 1st and 2nd permanent molars do you find a Carabelli cusp?
__________________________________________________ (Be specific)
55. (11.3/29) For credit on this one, both parts must be correct. Sorry, no half credit.
56. (Wk13p2) The root of a deciduous tooth is completely formed in just about __________ after eruption of that tooth into the mouth.
A. six months
B. one year
C. two years
D. three years
E. depends whether the tooth is Y2K compliant.
57. (Wk13p4) First deciduous molar have a prominent bulge of enamel...............where?
A. Mesial at the buccal
B. Mesial at the lingual
C. Distal at the buccal
D. Distal at the lingual
E. Between the front bumper and the grille
58. (13.5/4) What is the highest and sharpest cusp on the lower first deciduous molar?
A. Mesiobuccal
B. Distobuccal (Note and hint: This question appears regularly on Boards. Learn it!)
C. Distal
D. Distolingual
E. Mesiolingual
59. (Wk13p3) Examine the list of DIFFERENCES between the deciduous and permanent dentition. One of them is false. The rest are true. Identify and circle the one that is false.
A. Deciduous teeth are fewer in number and smaller in size.
B. Their enamel is thinner and whiter.
C. Their enamel rods near the cervical line are directed apically.
D. The crowns of deciduous teeth are more rounded.
E. The roots of deciduous molars are longer, more slender, and more greatly flared than those of permanent molar teeth.
60. (Wk13p4) Identify by appropriate letters, the deciduous teeth (right & left) than don't resemble any other tooth in the mouth. Sorry, no half credit.
____________ and _____________
61. (Free point-see next page for details) __________________________________ P9
001. (NB104) Each of the following cusps of the maxillalry molars is part of the maxillary molar primary cusp triangle EXCEPT one. Which one is this EXCEPTION?
A. Mesiofacial
B. Mesiolingual
C. Distofacial
D. Distolingual
002. (NB150) At 9 years of age how many primary teeth remain in the mouth:
A. 0
B. 4
C. 8
D. 12
E. 16
Well, folks, that wraps it up. The four of us, Drs. Luksha, Johnson, Heiss and Kolar wish you well for the Holidays and your career in dentistry.