Questions and Answers
The maxillary second premolar is generally identified by which of the following characteristics?
What is the smallest cusp of the three cusps on the mandibular second premolar called?
Distolingual cusp
Which premolars have the smallest occlusal table?
Teeth #21 and #28
In comparing #20 and #21, which of the following statements is false?
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The __________ premolar has a type trait that mandates you pay close attention to the _____ surface because of the _______ when removing carious proximal tooth structure.
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Which premolar is identified by an alphabet occlusal shape configuration?
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The transverse ridge connects the mesial buccal cusp to the distal lingual cusp in a mandibular second premolar.
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Which premolar has the widest mesiolingual cusp?
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Which premolar has variation in the number of cusps?
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Which one of the following types of premolars exhibits no transverse ridge?
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Which premolar has its mesial marginal ridge more cervically located than its distal marginal ridge?
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Which premolar has two major cusps almost the same size and length?
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Which premolar can you see the most of the occlusal surface from a lingual perspective?
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Which of the following premolars displays a cervical crown/root developmental depression, along with a mesial marginal ridge that is crossed by a developmental groove?
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Which premolar can reveal either a two-cusp ('U' or 'H' groove pattern) or three-cusp ('Y' groove pattern) variety?
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The mandibular first premolar has a type trait that mandates you angle the bur perpendicular to the occlusal table to avoid pulpal damage.
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Only one root is generally present on both mandibular first and second premolars.
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Which tooth can one view much of the occlusal surface from a lingual perspective?
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Referring to the figures shown below, what Vertucci classification is indicated?
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What do the maxillary second premolar (#4) and mandibular first premolar (#21) have in common?
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The transverse ridge connects the buccal cusp to the lingual cusp in a mandibular first premolar.
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Which of the following statements regarding permanent premolars can be considered incorrect?
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Which tooth has a crown that is tilted lingually (proximal view), while most of the _______ surface can be seen from a lingual view?
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Which of the following permanent premolars (Universal Notation) can display three cusps?
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How many occlusal table outline types can tooth #20 exhibit?
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Which of the following permanent teeth may NOT contain a transverse ridge?
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All of the following choices can be considered type traits when comparing maxillary first and second permanent premolars, EXCEPT:
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Which of the following choices can be considered a side trait when comparing mandibular first permanent premolars?
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Tooth #___ (Universal Notation) has the most variation in the number of cusps and tooth #___ (Universal Notation) has the most variation in occlusal outline forms:
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Which of the following statements is correct regarding general considerations of maxillary first molars?
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The 'cusp of Carabelli' is a small supplemental cusp located on the mesiolingual portion of the mesiolingual cusp.
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How many triangular ridges are included on the occlusal surface of a maxillary first molar?
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The oblique ridge of a maxillary 1st molar is formed from the distal triangular ridge of the mesiolingual cusp and the triangular ridge of the distobuccal cusp.
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Which of the following statements is correct regarding the mesial view of a maxillary 1st molar?
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The maxillary third molar shows more variation than all other anterior & posterior teeth regarding size, crown and root forms.
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Study Notes
Maxillary and Mandibular Premolars
- Maxillary second premolar has buccal and lingual cusps that are almost equal in length.
- Distolingual cusp is the smallest among the three cusps on the mandibular second premolar.
- Teeth #21 (mandibular first premolar) and #28 (mandibular second premolar) have the smallest occlusal tables compared to other premolars.
- The maxillary first premolar has a notable mesial concavity that is crucial to consider during cavity preparations.
Cusp Features and Traits
- Mandibular second premolar can have variations in cusp number, specifically tooth #20.
- Mandibular first premolar features a nonfunctional mesiolingual cusp as compared to the functional lingual cusp on tooth #21.
- Only the maxillary first premolar shows significant characteristics, such as a typical root structure and a cervical crown/root developmental depression.
Occlusal Views and Characteristics
- Mandibular second premolar exhibits an alphabetic occlusal pattern, identified with either "Y," "U," or "H" shapes.
- From a lingual perspective, tooth #21 presents a wide view of the occlusal surface due to the crown's lingual tilt.
- Tooth #28 features a cervical crown/root developmental depression that can affect restoration approaches.
Developmental Grooves and Ridges
- The transverse ridge in the mandibular second premolar does not connect the mesial buccal cusp to the distal lingual cusp.
- A groove may cross the mesial marginal ridge in tooth #12 (maxillary first premolar), a critical factor for identifying occlusal anatomy.
Anatomical Variations
- The maxillary first premolar typically features two roots, while variations in the number of cusps are most prominent in tooth #20 and occlusal outlines in tooth #29.
- Maxillary second premolar displays a short central groove, distinguishing it from the maxillary first premolar which generally has a more elongated groove.
Clinical Considerations
- It is important to angle the bur perpendicularly over the occlusal table in the mandibular first premolar to prevent pulpal damage during restorations.
- When identifying permanent molars, adjacent contact surfaces include specific premolar and molar relationships that aid in understanding dental arch layouts.
Molars Characteristics
- Maxillary first molars are characterized by their oblique ridges and five cusps, forming a distinctive occlusal pattern.
- Mandibular first molars have mesiofacial and mesiobuccal cusps, with a complex array of cusps and grooves that aid in food processing.
- The "cusp of Carabelli" is a supplemental cusp present on the mesiolingual cusp of some maxillary molars.
General Observations
- The occlusal height and arrangement of cusps can vary significantly between different molars, affecting their functional efficiency.
- Developmental grooves influence the classification of occlusal forms, which is vital for proper restoration techniques and dental education.
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Description
This quiz focuses on the anatomy and features of maxillary and mandibular premolars. You'll explore key characteristics, including cusp variations and occlusal patterns. Perfect for dental students seeking to deepen their understanding of these vital teeth.
