Tooth Morphology Quiz Questions And Answers

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Benjamin Yoon, DMD (Dentistry) |
General Dentist
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Benjamin Yoon earned his Doctor of Dental Medicine (DMD) from Nova Southeastern University College of Dental Medicine, equipping him with the necessary expertise and skills to excel in the field of dentistry. He is currently serving as a general dentist in the US Army.
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  • 1/25 Questions

    The _____ are sometimes referred to as “wisdom” teeth.

    • First molars
    • Premolars
    • Third molars
    • Canines
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About This Quiz

Here are some Tooth morphology quiz questions and answers for you. The tooth is an integral part of our body. From the outside, it may seem simple, but there is so much hidden beneath it. Are you well aware of the form and structure of teeth? Do you think you will pass this test? Well, this Tooth morphology test will tell us that. Try to get a score higher than 70%. .

Tooth Morphology Quiz Questions And Answers - Quiz

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  • 2. 

    There are how many premolars in the permanent dentition?

    • 2

    • 4

    • 6

    • 8

    Correct Answer
    A. 8
    Explanation
    In the permanent dentition, there are a total of eight premolars. Premolars are the teeth located between the canines and molars. They are used for grinding and chewing food.

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  • 3. 

     There are _____ molars in a complete permanent dentition.

    • 8

    • 14

    • 16

    • 12

    Correct Answer
    A. 12
    Explanation
    The permanent dentition refers to the set of teeth that replace the primary (baby) teeth. In the permanent dentition, there are usually 12 molars. Molars are the large, flat teeth located at the back of the mouth, used for grinding and chewing food. These molars are divided into four pairs, with three pairs on each side of the mouth. Therefore, the correct answer is 12.

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  • 4. 

    How many canines are in a quadrant of the permanent dentition?

    • 1

    • 2

    • 4

    • 8

    Correct Answer
    A. 1
    Explanation
    In the permanent dentition, there is only one canine in each quadrant. Canines are the pointed teeth located next to the incisors, and they are used for tearing and cutting food.

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  • 5. 

    Permanent maxillary molars have _____ roots.

    • Three

    • Four

    • Two

    • One

    Correct Answer
    A. Three
    Explanation
    Permanent maxillary molars typically have three roots. This is a characteristic feature of these molars, which sets them apart from other teeth in the mouth. The presence of three roots provides stability and support to these large, strong teeth, allowing them to withstand the forces of chewing and grinding food. The three roots are usually positioned in a triangular formation, with two roots located towards the buccal (cheek) side and one root towards the palatal (tongue) side. This root anatomy helps to anchor the tooth firmly in the upper jaw, ensuring its functionality and longevity.

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  • 6. 

    The primary dentition has _____ molars and _____ premolars.

    • 12; 8

    • 8; 0

    • 8; 4

    • 4; 4

    Correct Answer
    A. 8; 0
    Explanation
    The primary dentition consists of 20 teeth, which include 8 molars and 0 premolars. Molars are the larger, flatter teeth located in the back of the mouth that are used for grinding and chewing food. Premolars are smaller teeth located between the canines and molars, but they are not present in the primary dentition. Therefore, the correct answer is 8 molars and 0 premolars.

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  • 7. 

    Premolars and molars are used for _____ food.

    • Tearing

    • Cutting

    • Grinding

    • All of the above

    Correct Answer
    A. Grinding
    Explanation
    Premolars and molars are used for grinding food. These teeth have flat surfaces with ridges, known as cusps, which help in breaking down and crushing the food into smaller particles. Unlike incisors and canines, which are primarily used for tearing and cutting food, premolars and molars have a larger surface area and a stronger structure that allows them to efficiently grind and chew tougher foods such as meat and plant fibers. Therefore, the correct answer is grinding.

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  • 8. 

    There are ___ teeth in a quadrant of the primary dentition.

    • 5

    • 10

    • 20

    • 8

    Correct Answer
    A. 5
    Explanation
    A quadrant refers to one-fourth of a whole. In the primary dentition, there are a total of 20 teeth. Therefore, if we divide 20 by 4, we get 5. Hence, there are 5 teeth in a quadrant of the primary dentition.

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  • 9. 

    The cusp of Carabelli is found on the

    • Premolars.

    • Central incisors.

    • Maxillary first molars.

    • Maxillary second molars.

    Correct Answer
    A. Maxillary first molars.
    Explanation
    The cusp of Carabelli is a small, extra cusp found on the mesiopalatal aspect of the maxillary first molars. It is a common dental trait that can vary in size and shape. It is not found on premolars, central incisors, or maxillary second molars.

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  • 10. 

    The _____ often appear as a developmental anomaly, differing in size, shape, contour, and relative position.

    • Maxillary central incisors

    • Mandibular incisors

    • Maxillary and mandibular third molars

    • Mandibular first and second molars

    Correct Answer
    A. Maxillary and mandibular third molars
    Explanation
    The maxillary and mandibular third molars often appear as a developmental anomaly, differing in size, shape, contour, and relative position.

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  • 11. 

    The _____ premolar has two bifurcated roots.

    • Mandibular first

    • Maxillary first

    • Maxillary second

    • Mandibular second

    Correct Answer
    A. Maxillary first
    Explanation
    The maxillary first premolar is the correct answer because it is the only premolar in the given options that has two bifurcated roots. The mandibular first premolar has one root, the maxillary second premolar has one root, and the mandibular second premolar has one or two roots but they are not bifurcated. Therefore, the maxillary first premolar is the only option that fits the description given in the question.

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  • 12. 

    The first premolar is posterior to the _____ while the second premolar is anterior to the _____.

    • Lateral incisor, second molar

    • Canine, first molar

    • Second premolar, first molar

    • Canine, first premolar

    Correct Answer
    A. Canine, first molar
    Explanation
    The first premolar is posterior to the canine, while the second premolar is anterior to the first molar.

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  • 13. 

    A mandibular canine tooth:

    • Usually erupts before the maxillary canine.

    • Has a larger and more developed cusp than the maxillary canine.

    • Has a sharper cusp tip than a maxillary canine.

    • Has a sharper cusp tip than a maxillary canine.

    Correct Answer
    A. Usually erupts before the maxillary canine.
    Explanation
    The mandibular canine tooth usually erupts before the maxillary canine. This is because the mandibular teeth generally erupt before the maxillary teeth in the dental development process.

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  • 14. 

    A common anomaly of the maxillary lateral incisors that is characterized by the tooth being abnormally pointed or tapered in shape is called:

    • Barrel laterals.

    • Fused laterals.

    • Pegged laterals.

    • Cens in dente.

    Correct Answer
    A. Pegged laterals.
    Explanation
    Pegged laterals refer to a common anomaly of the maxillary lateral incisors where the tooth is abnormally pointed or tapered in shape. This condition is characterized by the tooth resembling a peg or a cone shape. It is a dental term used to describe the specific shape abnormality of the maxillary lateral incisors.

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  • 15. 

    The incisal surface of an anterior tooth is also known as the:

    • Facial surface.

    • Labial surface.

    • Incisal edge.

    • Incisal ridge.

    Correct Answer
    A. Incisal edge.
    Explanation
    The incisal surface of an anterior tooth refers to the biting edge of the tooth. It is the part of the tooth that comes into contact with the opposing teeth when biting or chewing. The term "incisal edge" is commonly used to describe this specific part of the tooth. The other options mentioned, such as facial surface, labial surface, and incisal ridge, do not specifically refer to the biting edge of the tooth.

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  • 16. 

    The difference(s) between the maxillary and mandibular central incisors is(are):

    • Maxillary central incisors are larger than the mandibular central incisors in all dimensions.

    • Labial surfaces of the maxillary central incisors are more rounded from the incisal aspect than those of the mandibular central incisors.

    • Cingulum in less prominent on the maxillary central incisors than the cingulum on the mandibular central incisors.

    • Both a and b.

    Correct Answer
    A. Both a and b.
    Explanation
    The correct answer is "Both a and b." The maxillary central incisors are larger than the mandibular central incisors in all dimensions, and the labial surfaces of the maxillary central incisors are more rounded from the incisal aspect compared to those of the mandibular central incisors. Therefore, both statements a and b are true and explain the differences between the maxillary and mandibular central incisors.

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  • 17. 

    The mandibular lateral incisors are: 

    • Larger than the maxillary lateral incisors.

    • Larger than the mandibular central incisors.

    • Larger than the mandibular canines.

    • Smaller than the mandibular central incisors.

    Correct Answer
    A. Larger than the mandibular central incisors.
    Explanation
    The mandibular lateral incisors are larger than the mandibular central incisors. This is because the lateral incisors are located next to the central incisors and are meant to be slightly larger in size. The lateral incisors play a role in maintaining proper alignment and balance of the teeth, and their larger size helps to achieve this.

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  • 18. 

    Characteristics of the primary dentition include:

    • Darker enamel.

    • Relatively thicker enamel.

    • Relatively large pulp chambers.

    • A tooth crown that is longer in relation to the total tooth length.

    Correct Answer
    A. Relatively large pulp chambers.
    Explanation
    The primary dentition refers to the set of baby teeth that children have before their permanent teeth come in. One of the characteristics of primary dentition is relatively large pulp chambers. The pulp chamber is the innermost part of the tooth that contains blood vessels and nerves. In primary teeth, the pulp chambers are larger compared to permanent teeth because the teeth are smaller in size. This allows for the development of the permanent teeth underneath the baby teeth.

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  • 19. 

    In the Universal Numbering System, the four first permanent molars are:

    • #16, #26, #36, and #46.

    • #3, #14, #19, and #30.

    • #2, #15, #18, and #31.

    • #18, #28, #38, and #48.

    Correct Answer
    A. #3, #14, #19, and #30.
  • 20. 

    The root of the mandibular second premolar is ______ than that of a mandibular first premolar, but ______ than the roots of the maxillary premolars.

    • Smaller; longer

    • Longer; shorter

    • Smaller; shorter

    • Shorter; longer

    Correct Answer
    A. Longer; shorter
    Explanation
    The root of the mandibular second premolar is longer than that of a mandibular first premolar, but shorter than the roots of the maxillary premolars.

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  • 21. 

    The largest and strongest teeth in the maxillary dentition are the maxillary:

    • First molars.

    • Second molars.

    • Canines

    • Central incisors.

    Correct Answer
    A. First molars.
    Explanation
    The first molars are the largest and strongest teeth in the maxillary dentition. They are located at the back of the mouth and have a large surface area for chewing and grinding food. These teeth have multiple cusps and roots, providing stability and strength. Canines, central incisors, and second molars are not as large or strong as the first molars.

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  • 22. 

    The maxillary second premolar differs from the maxillary first premolar in that the:

    • Distobuccal cusp slope is shorter than the mesiobuccal cusp slope on the second premolar.

    • Cusps of the maxillary first premolar are not as sharp as the maxillary second premolar.

    • Second premolar has only one root, and therefore only one root canal.

    • Second premolar is wider mesiodistally than buccolingually.

    Correct Answer
    A. Second premolar has only one root, and therefore only one root canal.
    Explanation
    The correct answer is that the second premolar has only one root, and therefore only one root canal. This means that there is only one space within the tooth for the nerves and blood vessels to enter and exit. In contrast, the first premolar may have two roots and therefore two root canals. This difference in root anatomy is an important distinction between the two premolars.

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  • 23. 

    Canines are also referred to as:

    • Wisdom teeth.

    • Eyeteeth.

    • Cuspids.

    • Both b and c.

    Correct Answer
    A. Both b and c.
    Explanation
    Canines are the pointed teeth located in the corners of the mouth, often referred to as eyeteeth or cuspids. The correct answer states that canines are also referred to as both b and c, which means they can be called eyeteeth or cuspids interchangeably.

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  • 24. 

    Which tooth structure is responsible for providing sensitivity and nutrients to a tooth?

    • Enamel 

    • Dentin

    • Pulp 

    • Cementum

    Correct Answer
    A. Pulp 
    Explanation
    The pulp is the central part of a tooth containing blood vessels, nerves, and connective tissue. It is vital for the health and function of the tooth as it provides the necessary nutrients and also conducts sensory information, which accounts for sensations such as pain or temperature. Unlike enamel, which is the hard, protective outer layer, or dentin, which supports the enamel and absorbs shock, the pulp is crucial for the tooth’s vitality and maintenance.

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  • 25. 

    The developmental groove that extends mesiodistally and divides the occlusal table in half is the _____ groove.

    • Marginal

    • Triangular

    • Central

    • None of the above

    Correct Answer
    A. Central
    Explanation
    The central groove is a significant developmental groove in dental anatomy, typically found on the occlusal surface of posterior teeth like molars. It runs mesiodistally (from the front of the tooth to the back) and serves to divide the occlusal table into two halves. The occlusal table is the chewing surface of the tooth.

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Benjamin Yoon |DMD (Dentistry) |
General Dentist
Benjamin Yoon earned his Doctor of Dental Medicine (DMD) from Nova Southeastern University College of Dental Medicine, equipping him with the necessary expertise and skills to excel in the field of dentistry. He is currently serving as a general dentist in the US Army.

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  • Sep 01, 2024
    Quiz Edited by
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    Expert Reviewed by
    Benjamin Yoon
  • Dec 06, 2012
    Quiz Created by
    Maurita
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