Mariana Cezar Ilha

Exploring the impact of malocclusion and dentofacial anomalies on the occurrence of traumatic dental injuries in adolescents.

OBJECTIVE To investigate the association between malocclusion/dentofacial anomalies and traumatic dental injuries (TDI) in adolescents. MATERIALS AND METHODS The sample of this cross-sectional study comprised 509 adolescents aged 11 to 14 years enrolled at public schools in the city of Osório, southern Brazil. Parents answered a structured questionnaire addressing demographic and socioeconomic characteristics. An examiner who had undergone a training and calibration exercise recorded malocclusion/dentofacial anomalies (Dental Aesthetic Index, DAI), TDI (Andreasen), and dental caries (World Health Organisation). Statistical analyses (SPSS software) involved Poisson regression with robust variance. RESULTS The prevalence of TDI was 11.6%, and the prevalence of defined, severe, and handicapping malocclusion was 24.0%, 21.6%, and 22.0%, respectively. The multivariate analysis demonstrated that the probability of TDI was approximately twofold higher among adolescents with severe malocclusion (prevalence ratio [PR] 2.22; 95% confidence interval [CI] 1.14-4.31) and handicapping malocclusion (PR 1.95; 95% CI 1.01-3.85) in comparison to those with normal occlusion or minor malocclusion. Defined malocclusion was not significantly associated with the outcome. Among the dentofacial anomalies evaluated, the probability of TDI was nearly twofold higher among adolescents with overjet greater than 3 mm (PR 1.96; 95% CI 1.14-3.37) and 2.2-fold higher among those with an abnormal molar relationship (PR 2.24; 95% CI 1.17-4.32), after controlling for confounding variables. CONCLUSIONS Severe and handicapping malocclusion, accentuated overjet, and abnormal molar relationship were strongly associated with the occurrence of TDI. Future studies should investigate whether the treatment of these conditions can help reduce the occurrence of TDI in adolescents.

Pulse oximetry: a useful test for evaluating pulp vitality in traumatized teeth

BACKGROUND AND AIM Subjective pulp tests are not trustworthy, particularly in traumatized teeth, and may lead to inaccurate diagnosis. The use of an objective test such as pulse oximetry (PO) could be a more reliable method to properly evaluate pulp status in this condition. The aim of this study was to analyze the effectiveness of PO in determining pulp vitality in traumatized teeth based on oxygen saturation measurements (%SpO2 ). SUBJECTS AND METHODS Fifty-nine permanent teeth that had undergone lateral luxation, and which were unresponsive to a cold spray test and were free from signs of necrosis, were selected and tested with PO at 7, 30 and 60 days after trauma. RESULTS Fifty-nine teeth were tested. At 7 days after trauma, 8 teeth had low rates of oxygenation, compared to 10 at 30 and 60 days. Low rates were defined as a saturation reading ≤77%SpO2 . These teeth were assigned to the pulp necrosis (PN) group. The other 49 teeth were either considered to have healthy pulps (HP) (saturation ≥90%SpO2 ) or were assigned to a pulpitis (PP) group (saturation ≥78 to ≤89%SpO2 ). The 10 non-responsive teeth were followed up for 1 year and all exhibited indications for endodontic treatment. The other 49 teeth (HP or PP) began to show positive responses to the cold spray (after 3-9 months of follow up). No significant differences (P < 0.05) were detected between the three periods analyzed, but %SpO2 rates were significantly different (P < 0.01) between the groups (HP vs PP, HP vs PN and PP vs PN). CONCLUSIONS PO can be extremely useful for the assessment of dental pulp status in traumatized teeth, particularly when these teeth do not show signs of PN and do not respond to cold tests.

Uso de chupeta em pré-escolares do sul do Brasil: prevalência e fatores associados

Objective: to investigate the prevalence and the factors associated with pacifier use by preschoolers. Subjects and method: cross-sectional study performed with 1316 children from zero to five years of age, in the city of Canoas, RS, Brazil. The research instrument was a semi-structured questionnaire answered by the responsible persons on sociodemographic (sex, skin color, child and maternal age, maternal level of education, and family structure and income) and behavioral (bottle-feeding and breastfeeding) characteristics. The outcome was the presence/absence of pacifier use. The statistical analysis included Poisson regression with crude and adjusted robust variance. Results: the prevalence of pacifier use at some point in life was 68.1%. The adjusted multivariate analysis showed that bottle-fed children presented a threefold higher prevalence of the outcome (PR: 3.21, 95%CI 2.25-4.59, p<0.001) compared to those who had never used the bottle. Moreover, an additional analysis found that younger children still use the pacifier compared to older ones. Conclusion: it is concluded that the prevalence of pacifier use is high and it is associated with nutrition habits. Thus, understanding the association of biopsychosocial aspects and their causality network becomes essential for establishing health promotion strategies in early childhood.