Background: Having knowledge about the frequency and distribution of cysts helps to know the possible diagnosis and complications of cysts and to plan appropriate treatment. There are many studies on the prevalence of odontogenic cysts in literature. However, these studies are based on the WHO classifications of 1992 and 2005, and there is no study using the latest classification updated in 2017. In this study, the latest classification scheme of WHO in 2017 is used.
Methodology: Data were collected from the medical records of the 462 odontogenic cyst patients regarding age, gender, follow-up duration, systemic conditions, localization of the cysts, examination findings before the operation, treatment methods applied, provisional diagnosis and pathology report. Cystic lesions were classified according to the new WHO classification in 2017.
Results: Pathology reports showed 246 patients had (53.2%) radicular cyst, 3 patients (0.6%) had inflammatory collateral cyst, 78 patients (16.8%) had dentigerous cyst, 51 patients (11.1%) had odontogenic keratocyst, 12 patients (2%) had lateral peridontal cyst, 15 patients (3.2%) had gingival cyst, 18 patients (3.8%) had glandular odontogenic cyst, 9 patients (1.9%) had calcifying odontogenic cyst , 6 patients (1.2%) had orthokeratinized odontogenic cyst and 24 patients (5.2%) had nasopalatine duct cyst.
Conclusion: Radicular cyst,dentigerous cyst and odontogenic keratocyst are the most prevalent odontogenic cyst in this study. The future studies might include more participants to evaluate for odontogenic cysts prevalence, odontogenic and non-odontogenic tumours, malign tumours, and precancerous lesions in oral cavity using the WHO classification scheme updated in 2017.
Author(s): Onur Åžahin, Onur OdabaÅŸÄ±