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This register-based study assessed the frequency of and age-specified variation in tooth extractions in adults visiting private dentists in Finland in 2012–2017. Retrospective study design was used on the register-based data of private sector services. Data of the entire 6 years, 2012–2017, included records of a total of 6,252,039 patients. From among these, further detailed information was gathered in 2012 for 1,058,305 patients, and in 2017, for 985,043 patients. For each 6 years, the data were aggregated into patients’ 5-year age groups that were observation elements. Proportions of patients undergoing oral surgical treatments were compared during the 6 years 2012–2017, and details of tooth extractions in 2012 and 2017. Linear regression modelling was used to analyse thinkable age- and year-related inclinations in oral surgical treatments. Across the 6 years, a total of 848,362 patients (13.6%) underwent oral surgical treatments, and the rates varied by year 13.3–13.8%. By age group, the smallest rates (9–10%) were for 35–49-year-olds and greatest (20–22%) for those aged below 25 or over 84. The rates in same-age groups were stable. In 2012 and 2017, mean numbers of tooth extractions per patient by year were 0.17 and 0.18, and per patients undergoing oral surgical treatments, 1.29 and 1.27, respectively. Proportion of patients undergoing oral surgical treatments and mean number of tooth extractions per patient was greater in younger and older age groups. Tooth extractions in adults are age-dependent and age-specified differences remain stable across the years.

Frequency and type of tooth extractions in adults vary by age: register-based nationwide observations in 2012–2017