Odontogenic tumours, a collaborative retrospective study of 75 cases covering more than 25 years from Estonia.
BACKGROUND
The aim of the present collaborative study was to analyse retrospectively the character of odontogenic tumours in Estonia, involving the entire Estonian population (1.4 million), and to compare their prevalence with the figures presented in similar reports from other countries.


METHODS
All material for the retrospective study was retrieved from the files of the Departments of Maxillofacial Surgery in Tartu and Tallinn, Estonia, where all in/out-patients are treated from the whole country. The final diagnosis in each case of odontogenic tumour was based on the 1992 WHO histological criteria.


RESULTS
A total of 75 odontogenic tumours was found, 74 (98.6%) of which were benign, and 1 (1.3%) was malignant. The frequency of odontogenic tumours in this study was the lowest ever reported. The most common tumours were odontoma (34.3%), followed by ameloblastoma with different subtypes (25.3%), ameloblastic fibroma (16%), odontogenic myxoma (12%) and benign cementoblastoma (8%).


CONCLUSIONS
Odontogenic tumours are relatively rare in Estonia compared with the data from other countries.
Tamme
Tiia
T
Department of Maxillofacial Surgery, University of Tartu, Tartu 51014, Estonia. tiia.tamme@klinikum.ee
Soots
Marianne
M
Kulla
Andres
A
Karu
Kert
K
Hanstein
Siiri-Mai
SM
Sokk
Airi
A
Jõeste
Enn
E
Leibur
Edvitar
E
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D000564:Ameloblastoma / Q000453:epidemiology; D002648:Child; D004957:Estonia / Q000453:epidemiology; D005260:Female; D006801:Humans; D008297:Male; D008339:Mandibular Neoplasms / Q000453:epidemiology; D008441:Maxillary Neoplasms / Q000453:epidemiology; D008875:Middle Aged; D009808:Odontogenic Tumors / Q000145:classification / Q000453:epidemiology*; D009810:Odontoma / Q000453:epidemiology; D015995:Prevalence; D012189:Retrospective Studies; D012737:Sex Factors