Questions and Answers
At what age does the primary dentition typically complete eruption?
Which of the following teeth erupts first in the lower arch?
How many primary teeth are in the primary dentition?
What is the eruption sequence of the maxillary lateral incisor?
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What implications does the difference in morphology of primary teeth have on clinical practice?
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Which of the following is the last primary tooth to typically exfoliate?
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Which primary teeth typically erupt between 12 to 18 months?
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At which age do lower canines usually erupt?
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Which primary teeth are categorized as incisors?
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When does the development of primary dentition begin?
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At what age do the lower central incisors typically begin to erupt in primary dentition?
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Which of the following teeth are expected to erupt between 12 to 18 months?
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What teeth are noted to erupt typically between 18 to 36 months?
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What is a characteristic of primary dentition eruption patterns?
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Which primary teeth typically erupt first in the lower arch?
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At 3 years of age, which primary teeth would one typically expect to have erupted?
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What should be observed regarding the timing of primary dentition eruption?
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What is the general characterization of the order of eruption for primary teeth?
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Which primary teeth are represented by the letter 'c' in the eruption schedule?
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What is the typical timing for the eruption of the 2nd primary molars?
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What is a notable feature of primary teeth compared to permanent teeth regarding enamel and dentine layers?
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What is the primary clinical significance associated with the broad flat interproximal contact areas of primary teeth?
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What is a common issue that may arise due to the morphology of primary teeth during endodontic treatment?
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During which age range does the eruption of primary teeth typically begin and end?
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What is the importance of the thinner enamel in primary teeth concerning caries progression?
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What morphological characteristic do primary teeth feature that can complicate restorative procedures?
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What potential risk is associated with permanent teeth due to multiple canals present during root development?
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Which of the following statements regarding natal teeth is true?
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What common anomaly occurs in teeth that accompany a dentigerous cyst?
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What percentage of lesions in primary dentition remain undetected without the use of bitewing radiographs?
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Study Notes
Objectives
- Understand the eruption sequence of primary teeth.
- Identify morphological differences between primary and permanent teeth.
- Recognize implications of these differences in clinical practice.
Primary Dentition Overview
- Development begins at 7 weeks gestation.
- Total of 20 primary teeth: 10 maxillary and 10 mandibular.
- Eruption commences around 6 months of age.
- Primary dentition is considered complete by 2.5 years.
Primary Teeth Composition
- Types of teeth include:
- 4 Incisors
- 2 Canines
- 4 Molars
Eruption and Exfoliation Timeline
- Eruption range varies by tooth type:
- Lower central incisors erupt between 6-10 months, exfoliate at 6-7 years.
- Upper central incisors erupt between 8-12 months.
- Lateral incisors erupt between 9-13 months (upper) and 10-16 months (lower).
- 1st molars erupt between 12-18 months, exfoliate 9-11 years (upper) and 14-18 months (lower).
- Canines erupt 16-22 months (upper) and 18-24 months (lower), with exfoliation around 10-12 years.
- 2nd molars erupt 22-33 months (upper) and 24-31 months (lower).
Eruption Patterns
- Eruption generally occurs in a chronological and symmetrical fashion.
- Monitor for variations in eruption order and symmetry.
- Investigate any premature exfoliation, especially without root resorption.
Common Anomalies
- Natal teeth may be present at or soon after birth, typically caused by a lower incisor, potentially affecting feeding.
- An eruption cyst is linked to dentigerous cyst formation.
Morphological Differences: Primary vs Permanent Teeth
-
Primary Teeth
- Thinner enamel and dentine.
- Shallow pulpal floor with multiple canals.
- Narrow occlusal table and broad, flat interproximal contacts.
- Clinical implications include quicker progression of caries to pulp and difficulties fitting restorative materials.
-
Permanent Teeth
- Thicker enamel and dentine layers.
- Shorter clinical crowns, providing less space for restorative bulk.
- Potential for easier pulp exposure due to morphology.
Clinical Significance
- Shape of primary teeth impacts caries diagnosis; up to 60% of lesions may remain undetected without bitewing radiographs.
- Thin and splayed roots in primary teeth increase risks in endodontic treatments and fractures.
Summary of Key Points
- Total of 20 primary teeth categorized into incisors, canines, and molars.
- Eruption starts at 6 months, concludes by 2.5 years.
- Recognize significant morphological differences impacting clinical management of primary versus permanent teeth.
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Description
This quiz focuses on the morphology and eruption sequence of primary dentition. Participants will learn to describe the characteristics of primary teeth and their development process. Ideal for dental students and professionals seeking to enhance their knowledge in pediatric dentistry.
