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Updated: Jun 5, 2026
07:26
Systematic Assessment of Mammalian Skull Specimens for Dental and Temporomandibular Joint Pathology
Published on: August 22, 2022
An evaluation of factors associated with persistent primary teeth
Ali Murat Aktan1, Isa Kara, Ismail Sener
1Department of Oral Diagnosis and Radiology, Faculty of Dentistry, Gaziantep University, Gaziantep, Turkey. alimurataktan@yahoo.com
European Journal of Orthodontics
|January 14, 2011
Summary
Persistent primary teeth, often due to missing successors or impacted permanent teeth, were analyzed using panoramic radiography. Mandibular second molars and maxillary canines were most frequently retained.
Area of Science:
- Dentistry
- Oral Radiology
Background:
- Persistent primary teeth, also known as retained deciduous teeth, occur when primary teeth remain in the dental arch beyond their normal exfoliation period.
- Understanding the reasons and characteristics of retained primary teeth is crucial for diagnosing and managing potential dental anomalies.
Purpose of the Study:
- To investigate the etiological factors contributing to the persistence of primary teeth.
- To analyze the radiographic characteristics of retained primary teeth, including their type, location, root resorption, and associated pathological conditions.
Main Methods:
- A retrospective analysis of 426 panoramic radiographs showing retained primary teeth was conducted, selected from over 100,000 images across nine clinics in Turkey.
- Evaluated factors included tooth type, number, location, root resorption level, and pathological conditions like caries, ankylosis, or periodontal issues.
Main Results:
- Six hundred and seventy-seven retained primary teeth were identified in 426 patients.
- The mandible and the left side of the jaw were more frequently affected.
- Congenital absence of permanent successors and impaction of successors were the most common reasons for primary tooth persistence.
- Mandibular primary second molars and maxillary primary canines were the most frequently retained types.
Conclusions:
- Congenital absence or impaction of successor teeth are primary drivers of primary tooth retention.
- Panoramic radiography is a valuable tool for assessing the characteristics and reasons behind retained primary teeth.
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