Podcast
Questions and Answers
During which period is mixed dentition present?
During which period is mixed dentition present?
What is the primary cause of exfoliation in children?
What is the primary cause of exfoliation in children?
What happens to primary teeth when their roots do not resorb?
What happens to primary teeth when their roots do not resorb?
At what age do central incisors typically start to erupt in maxillary teeth?
At what age do central incisors typically start to erupt in maxillary teeth?
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What is an eruption cyst?
What is an eruption cyst?
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Which of the following accurately describes root resorption?
Which of the following accurately describes root resorption?
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What is the typical shedding age for mandibular lateral incisors?
What is the typical shedding age for mandibular lateral incisors?
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Which primary teeth generally erupt last?
Which primary teeth generally erupt last?
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Primary teeth erupt from ______ to 2 years.
Primary teeth erupt from ______ to 2 years.
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Mixed dentition occurs between the ages of ______ and 12 years.
Mixed dentition occurs between the ages of ______ and 12 years.
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The process of shedding primary teeth is known as ______.
The process of shedding primary teeth is known as ______.
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Eruption cysts are also known as ______.
Eruption cysts are also known as ______.
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Last permanent teeth, known as third molars, typically erupt in the ______ to early 20s.
Last permanent teeth, known as third molars, typically erupt in the ______ to early 20s.
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Centals incisors in the maxillary teeth typically shed between ______ to 7 years.
Centals incisors in the maxillary teeth typically shed between ______ to 7 years.
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Root resorption is the gradual ______ away of the root due to the eruption of succedaneous teeth.
Root resorption is the gradual ______ away of the root due to the eruption of succedaneous teeth.
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The mandibular canine typically erupts between ______ and 12 years.
The mandibular canine typically erupts between ______ and 12 years.
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Study Notes
Mixed Dentition Overview
- Mixed dentition is the period between ages 6 and 12, characterized by both primary (baby) and permanent teeth.
Tooth Eruption Times
- Birth to 6 or 8 months: No teeth erupted ("edentulous").
- Primary teeth erupt from 6 months to 2 years.
- All 20 primary teeth are present between 2 and 6 years.
- Mixed dentition occurs from 6 to 12 years.
- Only adult teeth appear after 12 years.
- Last permanent teeth (third molars) erupt during late teens/early 20s.
Definition
- The mixed dentition phase is the period when both primary and permanent teeth exist in the mouth.
Teeth Formation
- Teeth formation begins early, even in young children.
- A 3-year-old may already be forming future teeth.
Eruption Status at Different Ages
- 8-year-olds may not have erupted premolars.
- 9-year-olds show that 6-year-old molars have erupted.
Exfoliation Process
- Permanent teeth move into position and cause root resorption of primary teeth.
- The process of shedding primary teeth is called exfoliation.
Root Resorption
- Root resorption is the gradual dissolving of a tooth root, caused by adjacent tooth eruption.
- This process prepares the space for the appropriate permanent tooth.
Eruption Cysts
- Also known as "eruption hematomas," these are bluish, fluid-filled swellings that develop over erupting teeth.
- Common in children, they usually resolve independently.
Exfoliation Timeline (Maxillary Teeth)
- Central Incisor: Eruption (8-12 months), Shedding (6-7 years)
- Lateral Incisor: Eruption (9-13 months), Shedding (7-8 years)
- Canine: Eruption (16-22 months), Shedding (10-12 years)
- First molar: Eruption (13-19 months), Shedding (9-11 years)
- Second molar: Eruption (25-33 months), Shedding (10-12 years)
Exfoliation Timeline (Mandibular Teeth)
- Central Incisor: Eruption (6-10 months), Shedding (6-7 years)
- Lateral Incisor: Eruption (10-16 months), Shedding (7-8 years)
- Canine: Eruption (17-23 months), Shedding (9-12 years)
- First molar: Eruption (14-18 months), Shedding (9-11 years)
- Second molar: Eruption (23-31 months), Shedding (10-12 years)
Identifying Primary and Permanent Teeth
- Consider the child's age.
- Look for permanent 6-year/12-year molars.
- Count the teeth from the midline.
- Compare tooth sizes.
- Consider the arch of the teeth.
- If available, review x-rays.
Teeth Issues and Intervention
- If roots don't absorb, teeth may need dentist removal.
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Description
This quiz explores the mixed dentition phase occurring between ages 6 and 12, where both primary and permanent teeth are present. Test your knowledge on tooth eruption times, formation, and exfoliation processes during this crucial developmental stage. Perfect for dental students or anyone interested in pediatric dentistry!
