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Updated: May 1, 2026

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Systematic Assessment of Mammalian Skull Specimens for Dental and Temporomandibular Joint Pathology
Published on: August 22, 2022
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[Inversion of unerupted second deciduous molar and second premolar: a case report].
Summary
Unerupted mandibular second deciduous molars are rare, typically impacting permanent teeth. This case highlights a rare instance of a primary molar failing to erupt below a developing premolar.
Area of Science:
- Dentistry
- Pediatric Dentistry
- Oral Surgery
Background:
- Tooth impaction is common in permanent dentition.
- Primary (deciduous) dentition impactions are exceptionally rare.
- Understanding primary tooth development is crucial for early diagnosis.
Observation:
- A clinical case of an unerupted mandibular second deciduous molar is presented.
- The unerupted primary molar was located below the developing second premolar.
- This positioning deviates from typical eruption patterns.
Findings:
- The study documents a rare case of primary tooth impaction.
- The mandibular second deciduous molar's position was anomalous.
- This finding challenges the conventional understanding of deciduous tooth impaction.
Implications:
- Early diagnosis of impacted primary teeth is essential for preventing complications.
- This case may inform diagnostic criteria for primary tooth impaction.
- Further research into the etiology of primary tooth impaction is warranted.
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