ABSTRACT
PURPOSE: To examine the relative importance of demographic and behavioral factors, as well as alcohol use, in motor vehicle crash (MVC)-related injuries in an adolescent sample. METHODS: Data were collected from two samples of adolescents. In Study 1, a total of 1576 9th through 12th graders from three different high schools provided information on risk-taking behavior and injuries experienced during the previous six months. Study 2 involved a more fine-grained analysis of behavioral factors related to MVC-related injuries. A sample of 573 adolescent males from an all-boys parochial high school completed questionnaires assessing risk-taking, attention and behavior problems, alcohol use, driving behavior, and self-reported injury. RESULTS: Rates of self-reported MVC-related injuries for a 6-month period were consistent across the two studies, ranging from 10% in the mixed-gender sample to 16% in the all-male sample. Consistent with previous findings, males reported more frequent MVC-related injuries and higher rates of risk-taking behavior. In Study 1, age and risk-taking behaviors were predictive of injuries while riding or driving in a car. In the all-male sample, risk-taking behavior and conduct problems were significant predictors of MVC-related injuries. CONCLUSIONS: Risk-taking is a consistent predictor of both general and MVC-related injuries. Intervention efforts with adolescents may be targeted at increasing safe driving strategies as well as decreasing risk-taking behaviors.
Subject(s)
Accidents, Traffic/statistics & numerical data , Adolescent Behavior , Risk-Taking , Wounds and Injuries/epidemiology , Adolescent , Female , Humans , Male , Risk Assessment , Sex Factors , Wounds and Injuries/etiologyABSTRACT
Se realizó un estudio comparativo in vitro, entre la técnica químico-mecánica (Caridex) y la técnica convencional en la remoción de caries radiculares. Se evaluó tanto clínica como histológicamente la eficiencia de estos métodos de eliminación de caries. Se observó que ambos procedimientos fueron eficientes en la remoción de caries radicular. La dentina libre de caries, remanente despúes del tratamiento con Caridex, se presenta diferente a la cavidad dentinaria fresada
Subject(s)
Aminobutyrates/therapeutic use , Dentin/chemistry , In Vitro Techniques , Root Caries/therapy , Dental Pulp/ultrastructure , Dentin/ultrastructure , Dental Leakage , Microscopy, Polarization , Porosity/drug effects , Root Caries/pathology , Treatment OutcomeABSTRACT
La resistencia adhesiva de la unión entre dos resinas compuestas de micro relleno, activadas por luz visible, fue determinada in vitro mediante ensayo de tracción. Las uniones se realizaron entre la nueva resina compuesta y material mantenido previamente en un medio acuoso por período de 1,7 y 28 días. Con la aplicación de una película delgada y continua de agente de enlace para esmalte o adhesivo dentinario sobre la superficie adherente desgastada, se obtuvo una resistencia de un 42 a 60% de la resistencia cohesiva del material base utilizado, en comparación con el 26 y 32% obtenido al no emplear una resina fluída en la interfase. La resistencia adhesiva mostró la tendencia general de aumentar con la antiguedad de la resina compuesta de base
Subject(s)
Adhesives , Composite Resins , Dental Casting Technique , In Vitro TechniquesABSTRACT
Se describe una técnica diferente para obtener retención en puentes unidos a los dientes por medio de un cemento de resina y grabado ácido del esmalte. El elemento retentivo de la estructura metálica está dado por pequeñísimas esferas metálicas, que se obtienen fundiendo un acondicionador usado en una técnica de ceramo-metal específica
