Tooth Morphology
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Study guide for a final.
- 1.Premolars and molars are used for _____ food.
- A.
Tearing
- B.
Cutting
- C.
Grinding
- D.
All of the above
- 2.Permanent maxillary molars have _____ roots.
- A.
Three
- B.
Four
- C.
Two
- D.
One
- 3.
- A.
#4, #5, #12, and #13.
- B.
#14, #15, #24, and #25.
- C.
#20, #21, #28, and #29.
- D.
#34, #35, #44, and #45.
- 4.There are ___ teeth in a quadrant of the primary dentition.
- A.
5
- B.
10
- C.
20
- D.
8
- 5.How many canines are in a quadrant of the permanent dentition?
- A.
1
- B.
2
- C.
4
- D.
8
- 6.There are _____ molars in the permanent dentition.
- A.
8
- B.
14
- C.
16
- D.
12
- 7.Canines are also referred to as:
- A.
Wisdom teeth.
- B.
Eyeteeth.
- C.
Cuspids.
- D.
Both b and c.
- 8.Characteristics of the primary dentition include:
- A.
Darker enamel.
- B.
Relatively thicker enamel.
- C.
Relatively large pulp chambers.
- D.
A tooth crown that is longer in relation to the total tooth length.
- 9.The first premolar is posterior to the _____ while the second premolar is anterior to the _____.
- A.
Lateral incisor, second molar
- B.
Canine, first molar
- C.
Second premolar, first molar
- D.
Canine, first premolar
- 10.The bony ridge over the labial portion of the roots of the canines that helps to form the facial contours is the:
- A.
Cusp.
- B.
Canus.
- C.
Imbrication line.
- D.
Canine eminence.
- 11.The _____ often appear as a developmental anomaly, differing in size, shape, contour, and relative position.
- A.
Maxillary central incisors
- B.
Mandibular incisors
- C.
Maxillary and mandibular third molars
- D.
Mandibular first and second molars
- 12.Most maxillary first premolars are considered to be ______ because they have a root that is divided into two roots.
- A.
Bifurcated
- B.
Succedaneous
- C.
Trifurcated
- D.
Bicanineate
- 13.A mandibular canine tooth:
- A.
Usually erupts before the maxillary canine.
- B.
Has a larger and more developed cusp than the maxillary canine.
- C.
Has a sharper cusp tip than a maxillary canine.
- D.
Has a sharper cusp tip than a maxillary canine.
- 14.
- A.
Maxillary central incisors are larger than the mandibular central incisors in all dimensions.
- B.
Labial surfaces of the maxillary central incisors are more rounded from the incisal aspect than those of the mandibular central incisors.
- C.
Cingulum in less prominent on the maxillary central incisors than the cingulum on the mandibular central incisors.
- D.
Both a and b.
- 15.
- A.
Marginal
- B.
Triangular
- C.
Central
- D.
None of the above
- 16.The cusp of Carabelli is found on the:
- A.
Premolars.
- B.
Central incisors.
- C.
Maxillary first molars.
- D.
Maxillary second molars.
- 17.The _____ are sometimes referred to as “wisdom” teeth.
- A.
First molars
- B.
Premolars
- C.
Third molars
- D.
Canines
- 18.The mandibular lateral incisors are:
- A.
Larger than the maxillary lateral incisors.
- B.
Larger than the mandibular central incisors.
- C.
Larger than the mandibular canines.
- D.
Smaller than the mandibular central incisors.
- 19.The incisal surface of an anterior tooth is also known as the:
- A.
Facial surface.
- B.
Labial surface.
- C.
Incisal edge.
- D.
Incisal ridge.
- 20.The largest and strongest teeth in the maxillary dentition are the maxillary:
- A.
First molars.
- B.
Second molars.
- C.
Canines
- D.
Central incisors.
- 21.In the Universal Numbering System, the four first permanent molars are:
- A.
#16, #26, #36, and #46.
- B.
#3, #14, #19, and #30.
- C.
#2, #15, #18, and #31.
- D.
#18, #28, #38, and #48.
- 22.A common anomaly of the maxillary lateral incisors that is characterized by the tooth being abnormally pointed or tapered in shape is called:
- A.
Barrel laterals.
- B.
Fused laterals.
- C.
Pegged laterals.
- D.
Dens in dente.
- 23.The maxillary second premolar differs from the maxillary first premolar in that the:
- A.
Distobuccal cusp slope is shorter than the mesiobuccal cusp slope on the second premolar.
- B.
Cusps of the maxillary first premolar are not as sharp as the maxillary second premolar.
- C.
Second premolar has only one root, and therefore only one root canal.
- D.
Second premolar is wider mesiodistally than buccolingually.
- 24.The primary dentition has _____ molars and _____ premolars.
- A.
12; 8
- B.
8; 0
- C.
8; 4
- D.
4; 4
- 25.The _____ premolar has two bifurcated roots.
- A.
Mandibular first
- B.
Maxillary first
- C.
Maxillary second
- D.
Mandibular second
- 26.The permanent _____ replace the primary first and second molars.
- A.
First molars
- B.
First and second molars
- C.
Premolars
- D.
Canines
- 27.The raised border on the mesial and distal surfaces of the lingual surface of anterior teeth is the:
- A.
Fossa.
- B.
Cingulum.
- C.
Marginal ridge.
- D.
Mamelon
- 28.There are how many incisors in each arch of the permanent dentitions?
- A.
2
- B.
4
- C.
6
- D.
8
- 29.The maxillary second premolar differs from the maxillary first premolar in that the:
- A.
First premolar is more narrow buccolingually than mesiodistally.
- B.
Cusps of second premolars are not as sharp as those of first premolars.
- C.
Lingual cusp is smaller than the buccal cusp on the maxillary second premolar.
- D.
All of the above.
- 30.There are how many premolars in the permanent dentition?
- A.
2
- B.
4
- C.
6
- D.
8
- 31.There are no ______ in the primary dentition.
- A.
Molars
- B.
Canines
- C.
Premolars
- D.
Incisors
- 32.A _____ is a pinpoint depression in the occlusal surface of a posterior tooth where two or more grooves meet.
- A.
Fossa
- B.
Pit
- C.
Fissure
- D.
Developmental groove
- 33.An unusually large space between adjacent teeth is known as a:
- A.
Fossa.
- B.
Mamelon.
- C.
Cusp.
- D.
Diastema.
- 34.The root of the mandibular second premolar is ______ than that of a mandibular first premolar, but ______ than the roots of the maxillary premolars.
- A.
Smaller; longer
- B.
Longer; shorter
- C.
Smaller; shorter
- D.
Shorter; longer
- 35.The root of the maxillary lateral incisor:
- A.
Is the same width as the root of the maxillary central incisor.
- B.
Is a bifurcated root.
- C.
May curve slightly to the distal.
- D.
Is the same size as the root of the mandibular lateral incisor.
- 36.The _____ are the longest teeth in the permanent dentition and are known as the cornerstone of the dental arches.
- A.
Canines
- B.
Central incisors
- C.
Lateral incisors
- D.
Molars
- 37.The smallest teeth in the permanent dentition are the:
- A.
Maxillary lateral incisors.
- B.
Mandibular central incisors.
- C.
Mandibular canines.
- D.
Maxillary central incisors.
- 38.Using the Universal/National Teeth-Numbering System, what are the numbers for the permanent third molars?
- A.
1, 2, 3, 4
- B.
3, 14, 19, 30
- C.
1, 16, 17, 32
- D.
2, 15, 18, 31
- 39.The third molars and the _____ vary in form more than any other teeth in the mouth.
- A.
Mandibular canines
- B.
Maxillary lateral incisors
- C.
Maxillary central incisors
- D.
Second molars
- 40.The size, shape, color, and position of the _____ directly relate to how a person looks.
- A.
Posterior teeth
- B.
Molars
- C.
Anterior teeth
- D.
Premolars
- 41.Which of the following adult teeth is nonsuccedaneous?
- A.
Maxillary right canine
- B.
Maxillary left second premolar
- C.
Mandibular right lateral incisor
- D.
Mandibular left second molar
- 42.The rounded enamel extensions on the incisal ridge of newly erupted central and lateral incisors are called:
- A.
Mamelons.
- B.
A fossa.
- C.
A cingulum.
- D.
A marginal ridge.
- 43.
- A.
Numbers 1 through 20.
- B.
A number for each quadrant and a number for each tooth.
- C.
Letters A through T.
- D.
Numbers inside a bracket.
- 44.The area where the cusp ridges converge at a central point on the occlusal surfaces of posterior teeth is the:
- A.
Triangular fossa.
- B.
Central fossa.
- C.
Central groove
- D.
Triangular groove.
- 45.
- A.
Which statement is NOT true of the maxillary canines?
- B.
The cusp tip is sharper on a maxillary canine than on a mandibular canine.
- C.
The canines have incisal edges similar to other anterior teeth.
- D.
The crown of the maxillary canine is in longer than the crown of the mandibular canine.
- 46.Correct contact between adjacent teeth is important because proper contact:
- A.
Helps prevent food from being trapped between the teeth.
- B.
Stabilizes the dental arch by holding teeth in positive contact with each other.
- C.
Protects the interproximal gingival tissue from trauma during chewing.
- D.
Does all of the above.
- 47.The decidious dentition has some teeth of both dentitions present.
- A.
True
- B.
False
- 48.Centric occlusion is the maximum contact between the occluding surfaces of the maxillary and mandibular teeth.
- A.
True
- B.
Falsa
- 49.The mandibular canines are usually the first permanent teeth to erupt in the oral cavity.
- A.
True
- B.
False
- 50.Class lll of Angles classifications is also considered neutrocclusion
- A.
True
- B.
False
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