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Incidence of cystic changes in impacted lower third molar
Shridevi R Adaki1, B K Yashodadevi, S Sujatha
1Department of Oral Medicine and Radiology, Bharati Vidyapeeth University Dental College, Sangli, Maharastra, India.
Summary
Cystic changes occur in 23.3% of impacted lower third molars (ILTM) with small follicular spaces, particularly in distoangular positions. Individualized assessment is crucial for extraction decisions.
Area of Science:
- Oral and Maxillofacial Surgery
- Dental Pathology
- Radiology
Background:
- Impacted lower third molars (ILTM) can develop cystic changes.
- A pericoronal space less than 2.5 mm on radiographs is a potential indicator.
Purpose of the Study:
- To determine the incidence of cystic changes in ILTM with pericoronal space < 2.5 mm.
- To evaluate associations between cystic changes and patient demographics, tooth angulation, and contact with adjacent teeth.
Main Methods:
- Retrospective analysis of 73 ILTM specimens with pericoronal space < 2.5 mm.
- Histopathological examination of extracted ILTM tissues.
- Statistical analysis of correlations with age, sex, angular position, and second molar contact.
Main Results:
- 17 (23.3%) of ILTM showed cystic changes, primarily dentigerous cysts (22.1%).
- Cystic changes were more common in the 26-30 age group and showed a non-significant male predominance.
- A statistically significant association was found between cystic changes and distoangular ILTM position (P < 0.05).
Conclusions:
- The incidence of cystic changes in ILTM warrants consideration for extraction, especially when symptomatic.
- Extraction decisions for impacted third molars should be individualized based on specific patient factors.
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