Podcast
Questions and Answers
What notable feature is found on the mesio-buccal cusp of the lower first molar?
What notable feature is found on the mesio-buccal cusp of the lower first molar?
Which two cusps are present linguistically on the lower first molar?
Which two cusps are present linguistically on the lower first molar?
What is the orientation of the buccal cusps on the lower first molar?
What is the orientation of the buccal cusps on the lower first molar?
How many root canals does the lower first molar typically have?
How many root canals does the lower first molar typically have?
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Which of the following is NOT a cusp on the buccal aspect of the lower second molar?
Which of the following is NOT a cusp on the buccal aspect of the lower second molar?
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What is the primary characteristic of the crown of upper central incisors (51;61) in comparison to their permanent counterparts?
What is the primary characteristic of the crown of upper central incisors (51;61) in comparison to their permanent counterparts?
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At what stage of development does initial calcification of primary dentition begin?
At what stage of development does initial calcification of primary dentition begin?
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Which of the following is NOT a stage in the chronology of upper central incisor development?
Which of the following is NOT a stage in the chronology of upper central incisor development?
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Which term best describes the primary goal of the learning outcomes regarding tooth morphology?
Which term best describes the primary goal of the learning outcomes regarding tooth morphology?
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In the context of dental education, which aspect should be emphasized according to the diversity of anatomy across the patient population?
In the context of dental education, which aspect should be emphasized according to the diversity of anatomy across the patient population?
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What is a significant difference observed between primary and permanent teeth?
What is a significant difference observed between primary and permanent teeth?
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Which of the following best describes the chronological order of primary tooth development stages?
Which of the following best describes the chronological order of primary tooth development stages?
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What anatomical feature characterizes the labial view of primary upper central incisors?
What anatomical feature characterizes the labial view of primary upper central incisors?
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What anatomical feature distinguishes the upper canine's labial view?
What anatomical feature distinguishes the upper canine's labial view?
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At what age does root completion of the upper canine typically occur?
At what age does root completion of the upper canine typically occur?
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How many pulp horns are found in the root canal of the upper lateral incisor?
How many pulp horns are found in the root canal of the upper lateral incisor?
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Which statement best describes the configuration of the crown of the upper canine when viewed mesially?
Which statement best describes the configuration of the crown of the upper canine when viewed mesially?
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What is the characteristic feature of the cingulum on an upper canine?
What is the characteristic feature of the cingulum on an upper canine?
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Which of the following features is NOT associated with the upper lateral incisor?
Which of the following features is NOT associated with the upper lateral incisor?
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How many root canals are typically present in the upper canine?
How many root canals are typically present in the upper canine?
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In the context of the upper canine, what does the term 'mesial and distal fossae' refer to?
In the context of the upper canine, what does the term 'mesial and distal fossae' refer to?
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Which characteristic feature is shared by both the upper lateral incisor and the upper canine?
Which characteristic feature is shared by both the upper lateral incisor and the upper canine?
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What is a common misconception regarding the enamel ridge on the upper canine?
What is a common misconception regarding the enamel ridge on the upper canine?
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When does initial calcification of the upper first molar occur?
When does initial calcification of the upper first molar occur?
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Which of the following statements about the cusps of the upper first molar is true?
Which of the following statements about the cusps of the upper first molar is true?
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What is the function of the tubercle of Zuckerkandl?
What is the function of the tubercle of Zuckerkandl?
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At what age does the crown of the upper first molar complete its development?
At what age does the crown of the upper first molar complete its development?
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How many pulp horns does the upper first molar typically have?
How many pulp horns does the upper first molar typically have?
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Which root structure is characteristic of the upper first molar?
Which root structure is characteristic of the upper first molar?
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What age range is typical for the eruption of the upper first molar?
What age range is typical for the eruption of the upper first molar?
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Which cusps are present on the palatal aspect of the upper first molar?
Which cusps are present on the palatal aspect of the upper first molar?
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What is the order of root completion for the upper first molar?
What is the order of root completion for the upper first molar?
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The central developmental groove is most associated with which feature of the upper first molar?
The central developmental groove is most associated with which feature of the upper first molar?
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What is the chronology of root completion for the lower central incisor?
What is the chronology of root completion for the lower central incisor?
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Which statement accurately describes the morphology of the lower lateral incisor?
Which statement accurately describes the morphology of the lower lateral incisor?
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What unique feature distinguishes the lower canine from other teeth?
What unique feature distinguishes the lower canine from other teeth?
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What is the mesial incisal angle characteristic of the lower central incisor?
What is the mesial incisal angle characteristic of the lower central incisor?
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At what stage does the initial calcification of the lower lateral incisor occur?
At what stage does the initial calcification of the lower lateral incisor occur?
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When does the crown completion of the lower first molar occur?
When does the crown completion of the lower first molar occur?
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Which characteristic can be observed from the lingual view of the lower canine?
Which characteristic can be observed from the lingual view of the lower canine?
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What feature is present in both the lower central and lower lateral incisors?
What feature is present in both the lower central and lower lateral incisors?
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What does the cervical region of the lower lateral incisor exhibit?
What does the cervical region of the lower lateral incisor exhibit?
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What is the general shape of the lower first molar's crown?
What is the general shape of the lower first molar's crown?
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Study Notes
Primary Dentition
- Upper Central Incisors (51;61)
- Initial calcification: 3-4 months in utero
- Crown completion: 4 months
- Eruption: 7.5 months
- Root completion: 1 ½ years
- Square rather than rectangular
- Shorter crown length and more bulbous rounded
Upper Lateral Incisor
- Laterally, the crown appears bulky
- Cervical undulation present
- Single root
- One root canal, 2 pulp horns, mesially & distally
Upper Canine (53;63)
- Initial calcification: 5 months in utero
- Crown completion: 9 months
- Eruption: 16-20 months
- Root completion: Approx. 3 years
- Crown is almost symmetrical
- Labially, an enamel ridge runs from crown 5p to cervical margin creating mesial & distal depressions (fossae) on either side of the ridge
- Distal surface slightly more rounded
- Mesial & distal marginal ridges
- Pronounced cingulum
- Bulky crown when viewed mesially or distally
Upper First Molar (54;64)
- Initial calcification: 5 months in utero
- Crown completion: 6 months
- Eruption: 12-16 months
- Root completion: 2-2 ½ years
- Buccally has 2 cusps: 1. Large mesio-buccal (mb) & 2. Small disto-buccal (db)
- 2 buccal roots
- Central developmental groove
- 2 palatal cusps: 1. Large mesio-palatal (mp) & 2. Small disto-palatal (dp)
- Single palatal root
- Large bulge of enamel cervically over the mesio-buccal root called the tubercle of Zuckerkandl (Z)
- 3 root canals and 4 pulp horns (one per cusp)
Lower Central Incisor (71;81)
- Initial calcification: 4 ½ months in utero
- Crown completion: 4 months
- Eruption: 6 ½ months
- Root completion: 1 ½-2 years
- Almost symmetrical when viewed labially
- Sharp mesial incisal angle
- Rounded distal incisal angle
- Single root, one root canal
- Mesial and distal pulp horns
- Large cingulum lingually
- Reduced mesial and distal marginal ridges
Lower Lateral Incisor (72;82)
- Initial calcification: 4 ½ months in utero
- Crown completion: 4 ½ months
- Eruption: 7 months
- Root completion: 1 ½-2 years
- Labially, the crown is fan-shaped with a long mesial side and a shorter distal side
- Sharp mesio-incisal angle
- Rounded disto-incisal angle
- Large cingulum lingually
- Mesial and distal marginal ridges
- One root, similar to deciduous central incisor
- One root canal and one mesial and one distal pulp horn
- Wedge-shaped and bulbous around cervical region when viewed mesially or distally
Lower Canine (73;83)
- Initial calcification: 5 months in utero
- Crown completion: 9 months
- Eruption: 16-20 months
- Root completion: 2 ½ -3 years
- Labially, the crown is convex
- Mesial is shorter than the distal incisal slope
- One root, roughly triangular in cross-section which curves distally and labially
- One root canal and no pulp horns
- Lingually, the crown is concave
- Mesial and distal marginal ridges
- Ridge of enamel from 5p of cusp to the cingulum producing a mesial and distal fossa
- Distal surface more rounded
- Cervical undulation on mesial and distal surfaces
Lower First Molar (74;84)
- Initial calcification: 5 months in utero
- Crown completion: 6 months
- Eruption: 12-16 months
- Root completion: 2-2 ½ years
- From buccal aspect: two cusps, mesio-buccal and disto-buccal
- Protuberance of enamel known as the tubercle of Zuckerkandl on mesio-buccal cusp in cervical region
- Lingually: two cusps: 1. Large mesio-lingual & 2. small disto-lingual
- Ridge of enamel joins mesio-lingual and mesio-buccal cusps, forming a small mesial and large distal fossa
- Buccal cusps lean lingually
- Two divergent roots, one mesial and one distal
- Two root canals and three pulp horns, one lingual, one mesio-buccal and one disto-buccal
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Description
This quiz covers the key aspects of primary dentition, focusing on the characteristics, calcification, eruption, and root completion of upper teeth, including incisors, canines, and molars. Test your knowledge on the development and anatomy of these primary teeth.
