Ameloglyphic, Dermatoglyphic, Sweat Pore Analysis of Hidrotic Ectodermal Dysplasia: A Rare Case Report.

Hidrotic ectodermal dysplasia (ED) is an autosomal dominant genetic disorder characterized by the triad of features such as nail dystrophy, generalized hypotrichosis, and palmoplantar hyperkeratosis. Physical development and life expectancy are not affected. Dermatoglyphics and ameloglyphics have been considered as casement of congenital abnormalities and other conditions. Young adults and children with hidrotic ED need to be evaluated early by a dentist to determine the oral outcome. Stipulated, appropriate care needs to be provided throughout the child’s growth to maintain oral function. According to this study ameloglyphics was found to be beneficial over dermatoglyphics in timely diagnosis and treatment planning.

[Comparison of enamel fluoride uptake between three different glass ionomers used in orthodontic banding: an in vitro study]

Decalcification of the teeth remains a problem during orthodontic treatment with fixed appliances. It has been suggested that fluoride-releasing glass ionomer cements could decrease the risk of enamel decalcification under orthodontic bands. The objective of this study was to compare enamel fluoride uptake from three different glass ionomer cements [Aqua Cem, Resilience and Bandite] used for band cementation in permanent teeth in vitro. In an experimental in vitro randomized trial, 33 sound premolars that were extracted for orthodontic purposes were randomly divided into thee groups. In each group one of the glass ionomer cements was tested. A 6 mm diameter adhesive tape was placed over the center of buccal enamel surface of each tooth and then the entire surfaces of them were painted with two layers of an acid protective nail polish. After removing adhesive tapes, brackets were cemented with one of the cements over the window. Then all the specimens were immersed in 5ml deionized water for one month. Brackets were debonded and remnants of cements were removed. The windows were etched with 1mI perchloric acid 0.5 M for 60 seconds and then 4 ml of 0.5 M Total Ionic Strength Adjustment Buffer [TISAB] was added to perchloric acid. Fluoride and calcium concentration of the solutions were determined by Potentiometer and Inductively Coupled Plasma, respectively. The depth of etch and fluoride concentration in the enamel were calculated, and the results were analyzed with one way ANOVA and Kruskal-Wallis test. In Resilience the mean fluoride concentrations group were higher and depths of etch were lower than in the other two groups. But there was no statistically significant difference between them. It seemed that an increase in fluoride uptake may be capable of rendering a tooth more resistant to dental decalcification

Determinaciones de algunas propiedades termofísicas del esmalte y la dentina / Determination of some termophysical of dental enamel and dentin

La prevención de caries mediante la aplicación de métodos físicos, entre ellos la radiación láser, requiere de una caracterización detallada de las propiedades de los tejidos dentarios duros. Algunas propiedades importantes son las termofísicas, dentro de las cuales la densidad y el calor específico han sido determinados en el presente trabajo. Estos valores obtenidos pueden servir no sólo para las investigaciones en relación con el láser sino también para otras líneas relativas a tejidos duros del diente

Efecto en el patrón de grabado y la penetración de una resina intermedia sobre el esmalte de dientes temporales, al utilizarse un ácido en forma de gel a diferentes tiempos de exposición / Effect in the patron of etching and the penetration of a intermediate resin on the enamel of primary teeth using an acid in gel form to different exposition time

Se plantea, "analizar y comparar por medio del microscopio electrónico de barrido, los patrones de grabado obtenidos al desmineralizar el tercio medio de la cara vestibular de incisivos temporales al ser sometidos a la acción de un gel que contiene ácido fosfórico al 37% durante 90 y 120"

La resistencia del esmalte a la disolución ácida: su relación con la actividad cariogénica / Enamel resistence to acid dissolution: its relation to cariogenic activity

Se estudió la relación existente entre la resistencia del esmalte (mediante la técnica colorimétrica desarrollada) y la experiencia anterior de caries y con la posterior incidencia en el término de 1 año, en escolares de 6, 8, 10 y 12 años. el estudio comprendiò a 336 niños en el periodo 1985 a 1986 y a 385 niños en el de 1986 a 1987. No se halló correlación positiva significativa entre los valores de la Prueba Colorimètrica y la experiencia anterior de caries; pero si se halló correlaciòn positiva con la posterior incidencia en la denticiòn permanente. Se concluye que la Prueva Colorimetrica resulta útil en la selección de niños con un esmalte muy susceptible así como en la predicción de la actividad cariogénica valorada conjuntamente con otros parámetros