Torppa-Saarinen E, et al. - Authours evaluated if the changes in different measures of perceived oral health (POH) were similar and related to each other over 11 years in the Finnish adult population in a longitudinal setting. They measured the perceived oral health by means of subjective oral health (SOH), self-assessed treatment need (STN), and oral health-related quality of life (OHRQoL). They noted the probable utility of multiple perceived oral health measures for service planning, as the changes in the 3 separate measures used in this longitudinal study were various and thus measured different aspects of perceived oral health.