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Patrícia Manarte 1, M. Conceição Manso 2, Daniel Souza 3, José ... - page 3 / 8





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Med Oral Patol Oral Cir Bucal. 2009 Aug 1;14 (8):e377-84.

Analytic cross-sectional study on dental erosion experience

ity of teeth dental erosion was considered when at least one teeth surface shows a dentin erosion wear (level two or three of severity). Data statistics analysis All statistic analysis procedures were carried out through the statistical package for the social sciences software, SPSS® v.15.0 (SPSS Inc., IL. Chicago, USA). A statis- tic significance level of 0.05 was considered, that is, the null hypothesis (considered in each test) was rejected in all the situations where the probability associated with tthe statistics of the test (p-value) was inferior to this value. Comparison of dental erosion by several intra- oral locations (Fig.1) was assed by means of Friedman test, and if significant differences were obtained, the identification of which dental locations showed differ- ences of dental erosion was assessed using the Wilcox- on test. Associations between dental surface outcomes and covariates (bivariate analysis) were assessed by un- adjusted odds ratio (Table 1). The independent effect of significant variables or covariates (p < 0.05) on dental surface erosion (severity level >0) being assessed us- ing backward stepwise binary logistic multivariate re- gression analysis (0.05 for covariate inclusion and 0.1 for exclusion). The result multivariate models (Table 2) for teeth surface dental erosion comprised intra oral location by arch, tooth type, and patients’ socio-demo- graphic characteristics, behaviour related to alcohol and drugs of abuse history and oral health promotion. Their goodness-of-fit assessment used -2loglikelihood test, Cox & Snell R2, Nagelkerke’s R2, and the area under the curve (AUC) derived from the model after applying a ROC analysis.

Results In the present survey a total of 50 patients, with an average age of 42 years (24 (minimum) to 67 (maxi- mum) years old), were inquired and observed, 15 (30%) women and 35 (70%) men. No statistic differences were found in age, for patient’s gender (t test, p=0.079), civil state (ANOVA, p=0.686), level of education (ANOVA, p=0.237) and their professional situation (ANOVA, p=0.513). Observed patients presented an average of 21.3 (sd=7.0) teeth. No significant statistical differences in the mean teeth number were found for patient’s gender (t test, p=0.771), civil state (ANOVA, p=0.734), level of education (ANOVA, p=0.826) and their professional sit- uation (ANOVA, p=0.270). In this study smoker female patients had the highest average of alcohol ingestion, 324.1 (sd=199.8) g/day, while non smoker ingested 176.5 (sd=66.7) g of alcohol/day. This difference was not as high for smoker and non smoker men, with an average daily alcohol intake of 266.9 (sd=173.1) g/day and 256.9 (sd=214.2) g/day, respectively. Average alcohol intake for all patients was 265.7 (sd=171.4) g/day. The expected alcohol g/day consumption was not different for smoker and non smoker women (t test, p=0.108), for smokers between gender (Mann-Whitney U test, p=0.867), and for non smoker men and women (t test, p=0.585). Clinical data revealed that 49.4% of 1064 teeth had enamel and/or dentin erosion lesions. From these, 36.9% of occlusal surfaces presented dental erosion with a le- vel 1 of severity, 11.4% with a severity level 2 and 1.1% with a severity level 3. Although occlusal dental surface globally presented higher experience of erosion lesions, severity level 3 was found to have the highest experi- ence in palatine dental surfaces (1.9%). Significantly more severe erosion lesions (Fig. 1) were observed in

Fig. 1. Dental erosion severity levels distribution by dental surfaces (for 50 patients).


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