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Recuento en saliva de Streptococcus mutans en niños de 6 a 12 años con y sin tinciones cromógenas

2017; Volume: 33; Issue: 2 Linguagem: Inglês

2340-3152

C. Sáez, I. Salinas Villanueva, Pedro Martínez, H.M. José María Martínez, R. Mauricio Barría,

Endodontics and Root Canal Treatments

espanolIntroduccion: Las tinciones cromogenas o “Black Stain” (BS) se han asociado a una baja experiencia de caries y un menor recuento de bacterias cariogenicas. El objetivo es determinar si existe diferencia en el numero de pacientes que presenten un alto recuento de S. mutans (>105 UFC/ml saliva) entre ninos con BS y sin ellas. Material y metodos: Estudio observacional analitico de corte transversal. Se incluyeron 158 escolares entre 6 y 12 anos de establecimientos educacionales de la ciudad de Valdivia, Chile. Luego de un examen clinico se determino la prevalencia de individuos con BS y se conformo un grupo con ausencia de tinciones para comparar el recuento de S. mutans. Se calculo la proporcion del numero de pacientes con valores >105 UFC/ml en ambos grupos para establecer los sujetos con alto riesgo cariogenico, evaluando si las diferencias fueron significativas (p Resultados: Se diagnostico BS en 15 ninos (6 hombres y 9 mujeres), estimando una prevalencia de 9,5% del total de examinados. De esta forma, los grupos de estudio se conformaron por 15 ninos con BS y 30 sin la tincion. No hubo diferencia estadisticamente significativa (p=0,538) en la proporcion de ninos con recuento >105 UFC/ml de S. mutans entre los grupos. Discusion: La presencia de BS en pacientes de 6 a 12 anos no se asocia a mayor o menor riesgo cariogenico. EnglishIntroduction: Chromogenic staining or “Black Stain” (BS) has been associated with a low caries frequency and less cariogenic bacteria count. The aim of the study was to determine the difference in the number of patients who have a high count of S. mutans (>105 CFU/ml saliva) among children with BS and without them. Material and methods: Analytical observational cross-sectional study. In this study were included 158 children between 6 and 12 years old, from educational establishments in the city of Valdivia, Chile. After clinical examination, the prevalence of individuals with BS was determined and a group was formed with no stains to compare the count of S. mutans. We calculate the ratio of patients with values> 105 CFU/ml in the two groups to identify the patients with high cariogenic risk. Statistical differences were evaluated by Fisher’s test (p Results: BS was diagnosed in 15 children (6 men and 9 women), estimating a prevalence of 9.5% of all examined. Thus, the groups studied were formed by 15 children with BS and 30 without staining. There was no statistically significant difference (p=0.538) in the proportion of children with >105 CFU/ml of S. mutans between groups. Discussion: The presence of BS in patients aged 6 to 12 years is not associated with cariogenic risk.