To analyze the effect of intra-oral application of CPP-ACP and CPP-ACPF pastes on the surface hardness of initial dental erosion lesions.Bovine enamel specimens were randomly assigned into 6 volunteers in 3 treatment groups: GI: CPP-ACP paste, GII: CPP-ACPF paste and GIII (Control): Placebo paste without CPP-ACP and without fluoride. Enamel specimens were selected by surface hardness (SHi), in vitro eroded by immersion in hydrochloric acid for 30 seconds (SHdes) and randomized between treatment groups and volunteers, who used the palatal intraoral device for 2 hours, applied the treatment on the specimens and used the palatal intraoral device for an additional 3 hours in 3 crossed phases, interspersed with a 7-day washout period. Subsequently, the surface hardness (SHre) was measured to estimate the re-hardening potential of the softened enamel promoted by treatments. Data were analyzed using the t-test and one-way ANOVA, adopting 5% significance level. Mean final and post-erosion hardness values were statistically significant for pastes tested (p<0.05), which presented re-hardening effect of the softened enamel, but with no difference between them and placebo (p>0.05). CPP-ACP and CPP-ACPF pastes did not demonstrate higher efficacy in re-hardening the eroded enamel compared to placebo paste.

Objective: To describe and analyze characteristics of cases of spinal cord Trauma (SCT) among traffic accident victims admitted to a referral hospital. Method: Descriptive, analytical, cross-sectional study with quantitative approach, developed in the city of Campina Grande, in the state of Paraíba, Brazil. The population consists of 1,884 medical records of patients admitted to hospital after damage caused by traffic accidents from January to December 2016. Data were analyzed using descriptive and inferential statistics, adopting a significance level of 5%. Results: Among the victims of traffic accidents, there was a male predominance (85.4%). The most affected age group was 21 to 30 years (29%). Accidents involving motorcyclists were predominant (82.9%) and 43 victims (2.3%) suffered spinal injury. Among these ones, there was a prevalence of males (86%), in the age group between 21 and 30 years (35.7%). In 30 cases (69.8%), the victims had spinal injuries. The cervical level (55.8%) was dominant. In addition, 46.7% of the victims were classified as ASIA and there were 9 cases (30%) of paraplegia and 1 case (3.3%) of tetraplegia. A bivariate analysis revealed a significant association between the variable presence of SCT and type of accident (p <0.001), use of cervical collar (p <0.005), injuries in other anatomical regions (p <0.001), surgical treatment (p < 0.001) and outcome of the patient’s situation (p <0.005). Conclusions: Among the victims of traffic accidents and SCT there was a predominance of males, young individuals and motorcyclists. Keywords: Epidemiology. Traffic-accidents. Public health. Spinal injuries. Spinal cord trauma.