Eruption Sequence: Primary Teeth

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Questions and Answers

Which of the following is the correct eruption sequence for primary teeth? (Select all that apply)

  • Mandibular 2nd Molar (correct)
  • Maxillary 1st Molar (correct)
  • Maxillary Canine (correct)
  • Mandibular Centrals (correct)

When do mandibular centrals typically erupt?

6 months

When do mandibular laterals typically erupt?

7 months

When do maxillary centrals typically erupt?

<p>7.5 months</p> Signup and view all the answers

When do maxillary laterals typically erupt?

<p>9 months</p> Signup and view all the answers

When do mandibular 1st molars typically erupt?

<p>12 months</p> Signup and view all the answers

When do maxillary 1st molars typically erupt?

<p>14 months</p> Signup and view all the answers

When do mandibular canines typically erupt?

<p>16 months</p> Signup and view all the answers

When do maxillary canines typically erupt?

<p>19 months</p> Signup and view all the answers

When do mandibular 2nd molars typically erupt?

<p>20 months</p> Signup and view all the answers

When do maxillary 2nd molars typically erupt?

<p>24 months</p> Signup and view all the answers

Canines erupt before 2nd molars in the primary dentition.

<p>True (A)</p> Signup and view all the answers

The tooth crown is ___ before eruption.

<p>fully formed</p> Signup and view all the answers

Roots of baby teeth are completely formed ____ after eruption.

<p>one year</p> Signup and view all the answers

Root resorption begins ______ after root completion.

<p>1 year</p> Signup and view all the answers

Deciduous teeth normally erupt from posterior to anterior.

<p>False (B)</p> Signup and view all the answers

In which quadrants do canines erupt after 1st molars?

<p>each quadrant</p> Signup and view all the answers

Flashcards

Mandibular Central Eruption

Mandibular central incisors typically erupt around 6 months of age.

Mandibular Lateral Eruption

Mandibular lateral incisors typically erupt around 7 months of age.

Maxillary Central Eruption

Maxillary central incisors typically erupt around 7.5 months of age.

Maxillary Lateral Eruption

Maxillary lateral incisors typically erupt around 9 months of age.

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Mandibular 1st Molar Eruption

Mandibular first molars typically erupt around 12 months of age.

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Maxillary 1st Molar Eruption

Maxillary first molars typically erupt around 14 months of age.

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Mandibular Canine Eruption

Mandibular canines typically erupt around 16 months of age.

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Maxillary Canine Eruption

Maxillary canines typically erupt around 19 months of age.

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Mandibular 2nd Molar Eruption

Mandibular second molars typically erupt around 20 months of age.

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Maxillary 2nd Molar Eruption

Maxillary second molars typically erupt around 24 months of age.

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Canines Eruption Order

Canines erupt before the second molars in the primary dentition.

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Tooth Crown Formation

The tooth crown is fully formed before eruption.

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Root Formation Post-Eruption

Root of primary teeth are complete one year after eruption.

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Root Resorption Timing

Root resorption begins 1 year after root completion.

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Primary Eruption Order

Deciduous teeth do not normally erupt from posterior to anterior.

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Canine Eruption Quadrant

Canines erupt in each quadrant after the first molars in primary dentition.

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Study Notes

Eruption Sequence of Primary Teeth

  • Primary teeth eruption follows a specific sequence, starting with mandibular centrals and ending with maxillary second molars.
  • The general eruption order is as follows:
    • Mandibular Centrals, Mandibular Laterals, Maxillary Centrals, Maxillary Laterals, Mandibular 1st Molar, Maxillary 1st Molar, Mandibular Canine, Maxillary Canine, Mandibular 2nd Molar, Maxillary 2nd Molar.

Eruption Timeline

  • Mandibular Centrals typically erupt at around 6 months.
  • Mandibular Laterals erupt at approximately 7 months.
  • Maxillary Centrals appear at about 7.5 months.
  • Maxillary Laterals emerge around 9 months.
  • Mandibular 1st Molars show up at approximately 12 months.
  • Maxillary 1st Molars erupt at around 14 months.
  • Mandibular Canines usually appear at about 16 months.
  • Maxillary Canines emerge at around 19 months.
  • Mandibular 2nd Molars erupt at approximately 20 months.
  • Maxillary 2nd Molars are the last primary teeth to erupt, typically at 24 months.

Eruption Characteristics

  • Canines erupt after the first molars but before the second molars within primary dentition, highlighting their unique timing.
  • The crown of baby teeth is fully formed prior to eruption, ensuring readiness for emergence.
  • The roots of primary teeth complete their formation approximately one year after their eruption.
  • Root resorption of primary teeth begins one year after root development is complete, marking a transitional phase for dental development.

General Eruption Pattern

  • Deciduous teeth normally erupt from anterior (front) to posterior (back) in the mouth, with the exception of canines, which erupt after the first molars in each quadrant.

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