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Questions and Answers
What is the typical age range for the eruption of the Upper Third Molar?
How many cusps does the Upper Third Molar generally have?
What is the earliest stage of development for the Lower First Molar?
Which of the following is NOT a cusp of the Lower First Molar?
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What is the typical range for root completion of the Upper Third Molar?
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What feature is located near the gingival margin on the upper central incisors?
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How many pulp horns are typically found in the root canal of the upper central incisors?
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What characteristic describes the crown enamel margin of the upper central incisors?
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What anatomical feature is formed above the cingulum on the upper central incisors?
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What is the shape of the root of the upper central incisor?
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What characterizes the palatal cusp of the upper first premolar?
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What does the mesial root surface of the upper first premolar exhibit?
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What is the function of the canine fossa on the mesial root surface?
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How many grooves and fossae are typically found on the upper first premolar?
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Which of the following is true regarding the upper first premolar?
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Which cusp of the lower second molar is higher than the disto-buccal cusp?
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What is the overall occlusal shape of the lower second molar?
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How many roots does the lower second molar typically have?
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Which feature of the lower second molar is described as being curved?
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Which of the following is true concerning the mesial root of the lower second molar?
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Which cusp is the smallest on the lower first molar?
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What is the shape of the lower first molar's crown when viewed occlusally?
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How many developmental grooves are present buccally between the cusps of the lower first molar?
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Which root of the lower first molar is typically wider and has a marked central groove?
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At what age does initial calcification of the lower second molar occur?
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What is the primary distinguishing feature of the distal cusp in the lower first molar?
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How many cusps does the lower second molar typically have?
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What characteristic shape has the buccal wall of the lower first molar?
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Study Notes
Upper Central Incisors
- Crown enamel margin undulates mesially and distally
- One single, tapering root
- One root canal with two pulp horns: one mesial and one distal
- Cingulum is convex and forms near the gingival margin
- Cingulum pit is located above the cingulum
Upper First Premolar
- Palatal cusp is smaller and narrower
- Tip of palatal cusp is displaced mesially when viewed from the palatal side
- One central groove, and two fossae inside the marginal ridges
- Mesial root surface has a developmental groove between the two cusps
- Canine fossa is a hollow concavity on the mesial root surface which houses the bulge distally on the canine
Upper Third Molar (18;28)
- Occlusal shape is triangular and often with only three cusps: palatal, mesio-buccal, and disto-buccal
- Often has three fused roots with three root canals, roots often curve distally
- Can be very varied in shape, cusp form, and number of cusps
Lower First Molar (36;46)
- Has five cusps: three buccal and two lingual
- Distal cusp is displaced onto the distal surface
- Mesio-buccal cusp is larger than the disto-buccal cusp
- Distal cusp is the smallest cusp
- Two developmental grooves buccally between the cusps, of which the mesial groove is deeper and longer
- Mesio-lingual cusp is larger than disto-lingual cusp
- Occlusally, the cusps interdigitate, and the central groove zig-zags between them
- Overall crown shape viewed occlusally is oval
- Two roots, mesial and distal
- Three or four root canals & five pulp horns
- Mesial root is wider and often has a marked central groove
- Developmental grooves on the mesial root
- Distal cusp is visible distally
- Very short marginal ridge to the lingual side of the distal cusp
- Distal root is narrower and usually without a groove
Lower Second Molar (37;47)
- Four cusps: two buccal and two lingual
- Mesio-buccal cusp is higher than disto-buccal cusp
- Mesio-lingual cusp is higher than disto-lingual cusp
- Overall occlusal shape is rectangular
- Buccal and lingual cusp tips are opposite each other
- Cross-shaped groove pattern
- Wider mesially than distally
- Two roots: one mesial and one distal
- Mesial root is wider and often grooved
- Buccal surface is curved
- Lingual surface is straighter
- Distal root is narrower
- Three to four root canals and four pulp horns
- Deeper lingual groove than buccal groove
- Fossae present
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Description
Test your knowledge on the anatomy of upper central incisors, first premolars, third molars, and lower first molars. This quiz explores the unique features and characteristics of these teeth, helping you deepen your understanding of dental structures.
