This study forms part of a longitudinal study (the main study) on a population consisting of institutionalised peo- ple aged 52–102 living in the Province of Granada, Spain. Data was collected from April 2009 to September 2010. The main study’s inclusion criteria were to have at least three natural teeth and/or to wear dentures. 369 residents were examined at baseline. During the 12-month follow- up period 102 participants were retired from the study, 66 because they died and 36 because of other causes. The participants were interviewed and given a dental examination at their institutions in a room guarantee- ing acceptable privacy. Head.
