Dental Occlusal Lab Midterm

Question 1

When does the maxillary canine erupt? (in relation to lateral incisor and first premolar)

Answer 1

After lateral incisor and first premolar

Question 2

The lingual cusp of the maxillary first premolar is inclined (which direction)?

Answer 2

Mesially

Question 3

From the occlusal aspect, the maxillary first premolar resembles which of the following shapes?

Answer 3

Hexagon

Question 4

Assuming a normal eruption sequence, which of the following teeth would be last to erupt?

Answer 4

Maxillary permanent canines

Question 5

A transverse ridge is formed by the junction of:

Answer 5

two triangular ridges

Question 6

The first posterior succadaneous tooth to erupt is normally the _____

Answer 6

Mandibular first premolar

Question 7

The greatest contours of the gingival attachments occur on which of the following? (Mesial or Distal surface of Anterior or Posterior teeth )

Answer 7

Mesial surface of anterior teeth

Question 8

Which of the following is NOT a characteristic of the maxillary first premolar?

Answer 8

The occlusal surface does not have a wrinkled appearance because of accessory grooves arising from the central groove

Question 9

The mesial marginal ridge of most posterior teeth is located more occlusally than in the distal marginal ridge. Which tooth is most likely to be the exception?

Answer 9

Mandibular first premolar

Question 10

A partial absence of bone in the form of a cleft, over the root of a tooth is called:

Answer 10

a dehiscence

Question 11

Which of the premolars is usually the smallest?

Answer 11

Mandibular first premolar

Question 12

When viewed from the facial aspect, an identifying characteristic of maxillary first premolars is which of the following?

Answer 12

The mesial cusp slope is longer than the distal cusp slope?

Question 13

When viewed from the mesial, an identifying characteristic of maxillary first premolar crowns is which of the following?

Answer 13

The presence of a mesial developmental depression

Question 14

The maxillary second premolar differs from the maxillary first premolar in which of the following characteristics?

Answer 14

a,b, and c a (A shorter mesial buccal cusp slope compared to the distal cusp slope) b (The absence of a mesial marginal ridge) c (Buccal and lingual cusp lengths of almost equal length)

Question 15

The maxillary first premolar will typically demonstrate which of the following pulpal configuration(s)?

Answer 15

Double root with two pulp canals

Question 16

The occlusal form of the mandibular second premolar is highly variable. Which of the following are the most common forms of this tooth?

Answer 16

a and b only a (Two cusps- buccal and lingual) b (Three cusps- buccal, mesiolingual, and distolingual)

Question 17

The developmental grooves form a “Y” pattern in which of the following premolars?

Answer 17

Mandibular second with three cusps

Question 18

With anterior teeth, what term is specific to canines?

Answer 18

Labial ridge

Question 19

Which of the following is formed by the junction of two surfaces and derives its name from the combination of the two surfaces that join?

Answer 19

Line angle

Question 20

True or False: The form of teeth has little to do with their individual function.

Answer 20

FALSE

Question 21

True or False: Anterior teeth have six point angles and posterior teeth have eight point angles.

Answer 21

FALSE

Question 22

True or false: All teeth have four line angles.

Answer 22

FALSE

Question 23

True or False: Unlike the maxillary first premolar, the pattern of grooves on the occlusal surface of the maxillary second premolar is more irregular and gives the tooth a “wrinkled” appearance.

Answer 23

TRUE

Question 24

True or False: The follicles of the developing incisors and canines are in a position lingual to the deciduous roots.

Answer 24

TRUE

Question 25

True or False: The measurement from the tip of the buccal cusp to the tip of the lingual cusp is less than the buccolingual measurement of the root of a maxillary first premolar at its cervical portion.

Answer 25

TRUE

Question 26

The determination of chronological age is possible for persons under what age when the dental maturity, tooth development, and osseous tissue development is considered?

Answer 26

20 years

Question 27

Which of the following is true regarding the pulp cavities of maxillary first premolar?

Answer 27

all of the above

Question 28

True or False: The form of the teeth and their arrangment are related to incising or crushing food without causing damage to supporting structures.

Answer 28

True as written

Question 29

True or False: Some of the form (of teeth) must also relate to that of the jaws and face and to occlusal forces that dictate various angles and positions within the arches.

Answer 29

True as written

Question 30

A hockey player comes into your office with his upper anterior teeth in his hand. How can you distinguish the right canine from the left?

Answer 30

The distal cusp ridge is longer than the medial cusp ridge

Question 31

The incisal edge takes an oblique course appearing as if twisted around the long axis of the root. This describes most succinctly the _______ (tooth and view)?

Answer 31

mandibular lateral incisor-incisal view

Question 32

Which of the following animal groups has a dentition most similar to humans?

Answer 32

Anthropoid apes

Question 33

True or False: DNA may be used in the identification of a deceased person.

Answer 33

TRUE

Question 34

True or False: However, teeth provide little to no source of DNA that may be used for identification purposes.

Answer 34

FALSE

Question 35

A hockey player comes into your office holding his friend's right canines (maxillary and mandibular) in his hand. His friend, a lacrosse player, got hit by a ball flying under his mask. Which of the following would you look for in the maxillary canine as compared to the mandibular canine? The maxillary canine ____

Answer 35

b and c only b (has a more pronounced cingulum) c (is wider mesiodistally)

Question 36

In the bite mark made by the human dentition, which of the following teeth makes a large rectangular mark?

Answer 36

Maxillary central incisor

Question 37

Which of the following represents the order of emergence od permanent reeth from earliest to latest eruption (Universal system of numbering)?

Answer 37

19, 8, 5, 11

Question 38

True or False: Groups of teeth develop at specific rates so that the sequence of eruption and emergence of the primary teeth is well defined with few deviations.

Answer 38

True as written

Question 39

True or False: For the individual child, considerable variation in the times of emergence of the primary dentition may occur.

Answer 39

True as written

Question 40

True or False: Continued formation of the tooth root is considered to be an active factor in moving the crown toward its final position in the mouth during eruption.

Answer 40

TRUE

Question 41

True or False: Root formation is completed once the tooth emerges and is in functional use.

Answer 41

False as written

Question 42

A deep developmental depression exists on which of the following surfaces of the maxillary first premolar?

Answer 42

Mesial

Question 43

A 6 year old boy is in a scuffle and a blow to the mouth yields a front tooth. Amidst the blood and mucous lies his front tooth in his hand with the root gone. It is likely:

Answer 43

to have had the root resorbed by the succadaneous tooth

Question 44

Which of the following age ranges best represents the mixed dentition period?

Answer 44

6-12 years

Question 45

True or False: From the mesial view, all mandibular posterior teeth resemble a rhombus.

Answer 45

True as written

Question 46

True or False: In relation to the root axis, the crown of all mandibular posterior teeth is tilted toward the lingual.

Answer 46

True as written

Question 47

The cementoenamel junction (CEJ) has all but which of the following as potential junctional schemes?

Answer 47

Dentin overlapping enamel and cementum (this does not occur)

Question 48

Which of the following statements is applicable to both the maxillary first premolar and the mandibular second premolar?

Answer 48

The lingual cusp is lower in height than the facial cusp

Question 49

True or False: Because of attrition that occurs with age, estimation of chronological age is more precisine in children as compared to adults.

Answer 49

TRUE

Question 50

Which of the following terms refers to opposing jaws of unequal size?

Answer 50

Anisognathous

Question 51

Im the majority of cases, the maxillary first premolar differs from the maxillary second premolar in that the first premolar has _____

Answer 51

two roots, one facial and one lingual

Question 52

The maxillary first premolar generally has (how many) pulp horns?

Answer 52

Two

Question 53

Which correctly describes the haplodont dentition?

Answer 53

Single cone teeth

Question 54

Which of the following teeth has a variant in form known as being "peg-shaped"?

Answer 54

Maxillary lateral incisor

Question 55

Which tooth has an almost continous crown-root outline on the mesial surface?

Answer 55

Mandibular canine

Question 56

How soon after eruption of a permanent tooth is the apex usually fully developed?

Answer 56

2-3 years

Question 57

Which are characteristics of the maxillary first premolar as compared to anterior teeth:

Answer 57

a and b only a (Wider facio-lingually than mesio-distally) b (Broader contact areas)

Question 58

Which is not true of a mandibular second premolar?

Answer 58

Buccal cusp *is not* larger than the first premolar

Question 59

The anatomic crown is shorter than the clinical crown of a tooth in which of the following instances?

Answer 59

Gingival recession

Question 60

From the mesial and distal aspect, all mandibular posterior teeth have a (______ outline)

Answer 60

Rhomboidal outline

Question 61

"Shovel-shaped" is a term that can be used to describe which of the following teeth?

Answer 61

Maxillary central incisors

Question 62

Which of the following is formed by the junction of two surfaces and derives its name from the combination of the two surfaces that join?

Answer 62

Line angle

Question 63

A ____ is a pinpoint depression located at the junctino of developmental grooves.

Answer 63

Pit

Question 64

_____ descend from the tips of the cusps of molars and premolars toward the central part of the occlusal surfaces

Answer 64

Triangular ridges

Question 65

Which of the following line angles in LEAST "square"?

Answer 65

distoincisal of the mandibular lateral incisor

Question 66

Permanent mandibular molars are distinguished from permanent maxillary molars in that permanent mandibular molars have (a) two roots, one mesial and one distal (b) crowns that are broader buccolingually than mesiodistally (c) lingual cusps almost equal in size (d) crown axes inclined toward the buccal

Answer 66

(a) and (c) only (a) two roots, one mesial and one distal (c) lingual cusps almost equal in size

Question 67

Which of the following teeth has a form that is often referred to as "heart-shaped"?

Answer 67

Maxillary second molar

Question 68

True or False: There is often times not enough space in the mandibular arch for the third molars to erupt.

Answer 68

True as written

Question 69

True or False: As a result (of not having enough room for third molars to erupt), partial eruption of the mandibular third molar can lead to both periodontal defects or root resorption at the distal of the second molar.

Answer 69

True as written

Question 70

True or False: The lingual inclination of the madibular molars is the basis for the curve of Wilson.

Answer 70

TRUE

Question 71

True or False: When the teeth are viewed from a point opposite the first molars buccally, a line following the occlusal and incisal surfaces describes the curve of Spee.

Answer 71

TRUE

Question 72

The oblique ridge found on a maxillary first molar is formed by the union of which of the following structures?

Answer 72

Distal cusp ridge of the mesiolingual cusp and the triangular ridge of the distobuccal cusp

Question 73

True or False: Both the mandibular first and second molars possess two buccal grooves, the mesiobuccal and distobuccal developmental grooves/

Answer 73

FALSE

Question 74

True or False: Because of attrition that occurs with age, estimation of chronological age is more precisine in adults compared to children

Answer 74

FALSE

Question 75

Which of the following is true regarding the Mandibular first molar?

Answer 75

a & b only (a) It is the largest of the mandibular teeth (b) It has two roots, mesial and distal

Question 76

The cusp of Carabelli, if present on a maxillary first molar, is found on which of the following surfaces?

Answer 76

Lingual of mesiolingual cusp

Question 77

True or False: The maxillary 1st molar is the largest tooth in the maxillary arch.

Answer 77

TRUE

Question 78

True or False: Maxillary molars are wider buccolinguallly than mesiodistally

Answer 78

TRUE

Question 79

On a maxillary first molar, the occlusal outline containes two obtuse angles and two acute angles. The acute line angles are (_____ and ______)

Answer 79

mesiobuccal and distolingual

Question 80

Which root of the maxillary first molar tends to be the longest?

Answer 80

Lingual

Question 81

The primary cusp triangle on the occlusal surface of a permanent maxillary molar is formed by the (a) distolingual cusp (b) mesiolingual cusp (c) cusp of Carabelli (d) mesiobuccal cusp (e) distobuccal cusp

Answer 81

(b), (d), and (e) (b) mesiolingual cusp (d) mesiobuccal cusp (e) distobuccal cusp

Question 82

From the lingual view, all five cusps of the mandibular first molar can be seen.

Answer 82

FALSE

Question 83

Which of the following animal groups has a dentition most similar to humans?

Answer 83

Anthropoid apes

Question 84

The permanent mandibular first molar typically presents which of the following developmental grooves?

Answer 84

a, b, and d (a) Mesiobuccal (b) Distobuccal (d) Lingual

Question 85

Which cusp of the maxillary first molar is the largest and most well formed?

Answer 85

Mesiolingual

Question 86

True or False: Continued formation of the tooth root is considered to be an active factor in moving the crown towards its final position in the mouth during eruption.

Answer 86

True as written

Question 87

True or False: Root formation is completed once the tooth emerges and is in function use.

Answer 87

False as written

Question 88

Which of the following roots MOST likely has two canals?

Answer 88

Mesiofacial root of the maxillary first molar

Question 89

Which of the following cusps is often the least well developed for a maxillary second molar?

Answer 89

Distolingual

Question 90

From the buccal view, how many roots can be seen on the Maxillary first molar?

Answer 90

Three

Question 91

True or False: The distal contact of the mandibular first molar is actually on the distal surface of the distal cusp

Answer 91

TRUE

Question 92

Which of the following cusps of the mandibular first molar is the widest when viewed from the buccal aspect?

Answer 92

Mesiobuccal

Question 93

True or False: A dehiscence is a window in the bone over the root.

Answer 93

FALSE

Question 94

True or False: A fenestration is a cleft of partial absence of bone over the root.

Answer 94

FALSE

Question 95

Which of the following are characteristics of a permanent mandibular first molar?

Answer 95

Two roots and three canals