The trend and risk factors of perceived toothache among Finnish adolescents from 1977 to 1997.

Toothache is a subjective oral health indicator that should become uncommon when oral health is improving. The aim of this study was to assess changes in perceived toothache between 1977 and 1997 among Finnish adolescents. In the Adolescent Health and Lifestyle Survey, a self-administered questionnaire was mailed to a representative sample of 12-, 14-, 16-, and 18-year-old Finns every second year. The sample sizes in the surveys varied from 2422 to 11,105, making a total of 35,349 subjects in the entire study. The incidence of toothache during the previous 2 years was requested in 1977, 1985, 1991, 1995, and 1997, and the prevalences were 31%, 25%, 28%, 29%, and 37%, respectively. The increase between 1995 and 1997 was highest among 16- and 18-year-olds. There was no tendency for perceived toothache to decline over the study period, despite the decrease in caries experience. Toothache varied by age, socioeconomic status (SES), place of residence, and toothbrushing frequency. The increase in the incidence of toothache reported after 1995 could be a warning signal that economic recession in Finland has caused changes in the dental care system.