ABSTRACT
OBJECTIVE: To systematically review the literature regarding the concordance of sleep bruxism (SB) between monozygotic (MZ) and dizygotic (DZ) twins. METHODS: The registration for this systematic review was accomplished in the International Prospective Register of Systematic Reviews (PROSPERO, No. CRD42021251751). As of July 2022, four databases were searched, including PubMed, Scopus, Embase, and Web of Science, as well as the grey literature in Google Scholar and OpenGrey. Observational studies evaluating SB in MZ and DZ twins of any age and sex were included. For the evaluation of the risk of bias, the Joanna Briggs checklist was utilized. The certainty of evidence was assessed via the Grading of Recommendations Assessment, Development, and Evaluation (GRADE) system. Pooled and subgroup meta-analyses were performed to estimate concordance of SB ââbetween twins (p < 0.05). RESULTS: In total, 3,155 records were identified. In the qualitative analysis, eleven studies were included; of these, seven were included in the meta-analysis. The majority of the articles exhibited a low risk of bias (63.6%). Greater SB concordance was observed between MZ twins than between DZ twins in the analysis of general concordance (OR = 1.47; 95% CI = 1.07-2.02) and also positive concordance (OR = 1.53; 95% CI = 1.29-1.81). Within the subgroup analyses, the significance of the findings remained only for the reported/self-reported SB regarding general concordance (OR = 1.44; 95% CI = 1.07-1.95) and positive concordance (OR = 1.55; 95% CI = 1.28-1.88). Low certainty of the evidence was observed for the general concordance analysis, while moderate certainty was observed for the positive concordance. CONCLUSION: There was a higher concordance of SB in MZ twins compared to DZ twins, indicating a possible genetic influence on the condition's occurrence.
ABSTRACT
AIM: To assess the impact of outpatient dental treatment on oral health-related quality of life (OHRQoL) of children and their families. MATERIALS AND METHODS: This prospective observational study was conducted with children with untreated dental caries, recruited from a public university/the pediatric dentistry clinic of a public university in the northeastern Brazil. Sociodemographic data were collected, a clinical examination was carried out before and after dental treatment, and the Early Childhood Oral Health Impact Scale (ECOHIS) questionnaire was applied to those responsible for the children, before and after dental treatment. Descriptive and bivariate statistics were used, and the Wilcoxon and Student's t tests were applied (p < 0.05). RESULTS: The study included 64 children, of both sexes, aged between 3 and 5 years old. The majority had a dmft index higher than or equal to 6 (60.9%), with a mean value of 7.11 (± 4.11). Sociodemographic conditions such as sex, age, and socioeconomic status had no impact on their OHRQoL (p > 0.05). The mean total ECOHIS questionnaire scores and those of its domains decreased after completion of the treatments (p < 0.05), except for scores in the self-image and distress domains of the parents (p > 0.05). This study reinforces the relevance of adopting oral health policies aimed at the prevention and treatment of ECC. CONCLUSION: Outpatient dental treatment had a positive impact on the OHRQoL of children and their families. CLINICAL RELEVANCE: The possibility of evaluating the services provided by the pediatric dentistry clinic.
