RESUMO
Objective: To analyze the change in tooth color produced by two hydraulic and one resin-based sealers by means of spectrophotometry for 3 years. Methods: Forty maxillary anterior teeth were selected (n = 10 per group). Root canals were prepared by rotary instrumentation and irrigation was performed with NaOCl, which was also used in the final irrigation, followed by saline and activated with Endoactivator. Root canals were then filled using single cone technique. Negative control (NC): gutta-percha filling; Positive control: gutta-percha and AH Plus; experimental groups: gutta-percha and Bioroot RCS/TotalFill BC Sealer. Gutta-percha was cut 2 mm below the cementoenamel junction, the pulp chamber was sealed with flowable composite. The teeth were kept in PBS. Color was measured in the cervical and incisal halves before root canal treatment (RCT), one and six months after RCT, and after one, two and three years, with the Vita EasyShade spectrophotometer; positioned using an individualized splint. ΔEab and ΔE00 were calculated. Two-way ANOVA repeated measures test followed by Bonferroni post-test were performed to analyze the ΔL, Δa*, Δb*, ΔEab, and ΔE00, considering treatment groups and evaluation periods. Statistical significance was set at p < 0.05. Results: In the incisal half, in decreasing order of darkening, the groups at three years were ordered according to the ΔEab: AH Plus > NC > TotalFill > Bioroot. ΔE00 values were: 1.38 ± 0.61 NC, 2.37 ± 0.70 AH Plus, 1.86 ± 0.60 BioRoot and 1.53 ± 0.85 TotalFill. In the cervical half, the ΔEab values, showed the same descending order, except for Bioroot and TotalFill which alternated the order. The ΔE00 values were 1.86 ± 0.61 NC, 3.01 ± 0.70 AH Plus,1.89 ± 0.58 Bioroot and 1.65 ± 0.41 TotalFill, with no significant differences between groups and times in both locations. Conclusions: All groups presented some degree of discoloration. Lightness and b* component were the most influential. Calcium silicate-based cements (Bioroot RCS and TotalFill BC Sealer) produced acceptable levels of discoloration at the end of follow-up.
RESUMO
El objetivo de este estudio fue caracterizar la presencia de indicadores clínicos y de contenido de personalidad en una población adolescente, a través del inventario multifásico de personalidad de Minnesota, forma A. La muestra de este estudio está conformada por 69 adolescentes escolarizados, de 14 a 17 años, tanto hombres como mujeres, de estrato socioeconómico medio y alto de la ciudad de Barranquilla. Los datos se analizan con el SPSS versión 19.0 para el análisis de estadísticos descriptivos, los resultados arrojan perfiles válidos y son consistentes con investigaciones previas, según las cuales se puede diferenciar población normal de población con indicadores clínicos de personalidad de importancia; en algunas escalas, sin embargo, los puntajes son más altos que los encontrados en otras investigaciones para grupos similares, dando cuenta de las variaciones introducidas por el contexto y la dinámica sociocultural actual, siendo más elevados para las mujeres. Las características clínicas más significativas son esquizofrenia, hipomanía, masculinidad-feminidad y psicastenia; mientras que los puntajes de las escalas de contenido más significativos son en las de pensamiento extravagante, obsesividad y ansiedad.
The objective of this study was to characterize the presence of clinical and content personality indicators in adolescent students through the Minnesota Multiphasic Personality Inventory Form A. The sample is formed by 69 adolescent secondary school students, aged from 14 to 17, including men and women, middle and high socioeconomic status from Barranquilla. The information was analyzed with SSPSS, 19.0 version for the analysis of descriptive statistics. The results show valid profiles and they are consistent with previous research that according to the population; can be differentiated into normal population and population with clinical indicators of personality. In some scales, although, the scores are higher than the ones found in other similar groups, accounting for the variations introduced by the context and actual sociocultural dynamics, scores are higher particularly in women. The most significant clinical characteristic are schizophrenia, hypomania, masculinity-feminity and psychastenia; while scores in content scales are more significant for Bizarre Mentation, Obsessiveness and Anxiety.
RESUMO
Los informes contradictorios acerca de la asociación entre el grupo sanguíneo A y giardiasis, motivaron a los autores a investigar este problema en una muestra de 757 niños, de los cuales 385 tenían quistes de giardia en las heces. Por otro lado, se colectó la información que a este respecto existe en la literatura médica y se analizaron los datos empleando un procedimiento estadístico que ha sido sugerido para investigar la relación entre grupos sanguíneos y enfermedad. Los datos recabados y el análisis de la información obtenida en la literatura, permiten estimar que por cada 100 personas del grupo O con G. lamblia existen 143 del grupo A, es decir que el riesgo de enfermar en estos últimos es 43% más alto