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Abnormal premolar eruption: classification, aetiology, and treatment based on a case series study
1Department of Odontology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark. ik@sund.ku.dk.
Summary
This study classifies abnormal premolar eruption by cause, focusing on primary molar resorption. Treatment guidance is provided based on etiology for better outcomes in pediatric dentistry.
Area of Science:
- Dentistry
- Orthodontics
- Pediatric Dentistry
Background:
- Deviations in mandibular and maxillary premolar eruption are common in pediatric dentistry.
- Understanding the etiology of these deviations is crucial for effective treatment planning.
Purpose of the Study:
- To classify deviations in premolar eruption based on etiology.
- To analyze the resorption patterns of preceding primary molars.
- To provide etiological treatment guidance for abnormal premolar eruption.
Main Methods:
- A case series of 64 patients with abnormal premolar eruption was analyzed.
- Cases were categorized into three eruption phases (Phase 1, 2, and 3).
- Sub-grouping was based on primary molar ankylosis and resorption status.
Main Results:
- Phase 1 showed correlations between primary molar ankylosis, ectopic premolar locations, and migration patterns.
- Phase 2 revealed varied etiologies (bone dysplasia, ectoderm deviation) impacting premolar eruption and primary molar resorption.
- Phase 3 highlighted abnormal innervation and enzyme defects as potential causes for seemingly ankylosed premolars.
Conclusions:
- Ectopic and arrested premolars present diverse etiologies.
- Treatment strategies for abnormal premolar eruption must be tailored to the specific etiology.
- Further research is needed to fully elucidate pathological eruption processes.
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