Gingival recession and oral health-related quality of life: a population-based cross-sectional study in Brazil

ObjectivesTo assess the association between gingival recession (GR) and oral health-related quality of life (OHRQoL) in a Brazilian population of adults. MethodsA representative sample from Porto Alegre city was drawn in 2011 using a multistage probability sampling strategy. For this study, 740 individuals, 35-59 years of age and with 6 teeth, were included. GR was assessed by two calibrated examiners at four sites in all present teeth. The Oral Health Impact Profile (OHIP-14) was used to assess OHRQoL. OHIP-14 was dichotomized using fairly often' as the cutoff point for a negative impact. Multiple logistic regression models were fitted to define which descriptors of GR were associated with the dichotomous outcome of OHIP-14, including dentine hypersensitivity in separate models, adjusting for age, gender, socioeconomic status, smoking, dental care, and missing teeth. ResultsMean OHIP was significantly higher for individuals with 1 tooth with GR 2, 3, 4, and 5 mm. Individuals with 1 tooth with GR 2 mm had approximately two times higher chance of having a negative impact than individuals without GR of this threshold [odds ratio (OR) = 1.99, 95% confidence interval (CI) 1.05-3.78]. When buccal and proximal sites were analyzed separately, the presence of GR was significantly associated with worst quality of life only in anterior and not in posterior teeth. GR in the lower arch had no impact on OHRQoL. GR 2 mm affected only physical pain (OR = 2.61; 95% CI 1.06-6.42), whereas GR 4 mm affected functional limitation, physical pain, psychological discomfort, physical and psychological disabilities, with ORs ranging from 1.43 to 1.91. Dentine hypersensitivity alone was not associated with OHRQoL, but it modified the association between GR and OHIP when present concomitantly with GR, mainly in buccal sites. ConclusionsOHRQoL is poorer in this adult population in the presence of GR, mainly in upper and anterior teeth. Dentine hypersensitivity and esthetics were found to be factors linking GR to OHRQoL.