Background: Dental esthetics, chewing and speech should be preserved in a dentition denominated functional\nand are closely related to satisfaction with oral health (SOH), impacts caused by oral problems and have a possible\nassociation with Oral Health-Related Quality of Life. Thus, the purpose of the present study was to investigate the\ninfluence of different concepts of functional dentition (FD) on both SOH and impacts on daily performance (IDP)\namong Brazilian adults.\nMethods: A cross-sectional study was conducted with 9564 adults (35ââ?¬â??44 years). SOH and IDP were evaluated\nusing the Oral Impacts on Daily Performance (OIDP) questionnaire. FD was considered based on four different\ndefinitions: I-classification of the World Health Organization (FDWHO = ââ?°Â¥20 teeth); II-well-distributed teeth\n(WDT = ââ?°Â¥10 teeth in each arch); III-classified by esthetics and occlusion (FDClass5 = sequential presence of one tooth\nin each arch, ââ?°Â¥10 teeth in each arch, 12 anterior teeth, ââ?°Â¥three posterior occluding pairs [POPs] of premolars and\nââ?°Â¥one POP molar bilaterally); and IV-classified by esthetics, occlusion and periodontal status (FDClass6 = FDClass5 plus\nall sextants with CPI ââ?°Â¤ 3 and/or CAL ââ?°Â¤ 1). The proportion of adults satisfied with oral health and without overall\nimpact (OIDP = 0) was calculated for each definition of FD. Multiple Poisson regression models were adjusted by\ndemographic-socioeconomic characteristics, self-reported oral problems and the use of dental services for each\ndependent variable.\nResults: When FDClass5 and FDClass6 were considered a greater proportion of adults reported being satisfied\n(52.1 and 53.1%, respectively) and have OIDP = 0 (52.4 and 53.3, respectively). In the multiple models, SOH was\nassociated with FDClass5 (RP = 1.21) and FDClass6 (RP = 1.24) and OIDP = 0 was associated with WDT (RP = 1.14)\nand FDClass6 (RP = 1.21).\nConclusions: The greater influence of WDT, FDClass5 and FDClass6 on aspects related to quality of life in comparison\nto FDWHO demonstrates the need for the establishment of a broader definition of FD that encompasses subjective\naspects.
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