Evaluación del efecto de múltiples usos de fresas de diamante sobre la rugosidad y fuerza de adhesión dental
Cargando...
Archivos
Fecha
2019
Autores
Director
Título de la revista
ISSN de la revista
Título del volumen
Publicador
Páginas
Resumen
El objetivo de la investigación fue evaluar el efecto de la preparación de piezas dentales usando fresas de diamante utilizadas múltiples veces sobre la rugosidad de la estructura dental y la fuerza de adhesión de los adhesivos a la dentina en piezas dentales humanas extraídas. Además, se documentó la morfología microscópica de las fresas después de múltiples usos mediante microscopía electrónica de barrido. Para rugosidad se probaron cuatro grupos de número de usos previos de las fresas (0, 2, 5 y 10 usos) y 20 repeticiones por grupo; la evaluación se realizó mediante un perfilómetro de contacto. Para adhesión se probaron dos grupos de número de usos de las fresas (0 y 10 usos) y 15 repeticiones por grupo, adhesivo de autograbado y resina; la evaluación se realizó mediante prueba de cizalla, utilizando una máquina de prueba universal. Los resultados de la investigación mostraron una tendencia a disminuir la rugosidad conforme aumenta el número de usos de las fresas, aunque solo hubo diferencias estadísticamente significativas (p<0.05) entre 0 y 10 usos y entre 2 y 10 usos. Para la variable fuerza de adhesión no hubo diferencias estadísticas significativas entre ambos grupos de número de usos de las fresas, aunque la fuerza de adhesión fue mayor con la fresa de 10 usos. La morfología de las fresas dentales cambia conforme el número de usos de estas, existiendo una tendencia a desgaste, pérdida de masa y presencia de socavados por la disminución de los granos de diamante. Se concluye que el uso repetitivo de las fresas de diamante afecta la rugosidad de las estructuras dentales, pero no influye de manera estadísticamente significativa en la fuerza de adhesión. Así mismo, que se requiere más investigación para aumentar y lograr un conocimiento más completo sobre el tema.
Inglés: The objective of this research was to evaluate the effect of the preparation of teeth with diamond burs used several times on the roughness of the dental structure and the bond strength of the adhesives to the dentine in extracted human teeth. In addition, the microscopic morphology of dental burs after multiple uses was documented by scanning electron microscopy. For the roughness test, four groups of previous uses of the burs (0, 2, 5 and 10 uses) and 20 repetitions per group were tested; the evaluation was made using a contact profilometer. For the bond strength test, there were two groups of number of uses of the burs (0 and 10 uses) and 15 repetitions per group and self-etching adhesive and resin were used; the evaluation was performed by shear bond strength test, using an universal testing machine. The results of the investigation showed a tendency to decrease the roughness as the number of uses of the burs increased, although there were only statistically significant differences (p<0.05) between0 and 10 uses and between 2 and 10 uses. For the bond strength variable, there were no significant statistical differences between the two groups of number of uses of the burs, although bond strength was greater with the bur of 10 uses. The morphology of dental burs changes according to the number of uses of these, tending to wear, loss of mass and presence of undercuts by the decrease of the diamond grit. It is concluded that the repetitive use of diamond burs affects the roughness of dental structures but does not influence in a statistically significant way the bond strength. Also, more research is required to increase and achieve a more complete knowledge on the subject.
Inglés: The objective of this research was to evaluate the effect of the preparation of teeth with diamond burs used several times on the roughness of the dental structure and the bond strength of the adhesives to the dentine in extracted human teeth. In addition, the microscopic morphology of dental burs after multiple uses was documented by scanning electron microscopy. For the roughness test, four groups of previous uses of the burs (0, 2, 5 and 10 uses) and 20 repetitions per group were tested; the evaluation was made using a contact profilometer. For the bond strength test, there were two groups of number of uses of the burs (0 and 10 uses) and 15 repetitions per group and self-etching adhesive and resin were used; the evaluation was performed by shear bond strength test, using an universal testing machine. The results of the investigation showed a tendency to decrease the roughness as the number of uses of the burs increased, although there were only statistically significant differences (p<0.05) between0 and 10 uses and between 2 and 10 uses. For the bond strength variable, there were no significant statistical differences between the two groups of number of uses of the burs, although bond strength was greater with the bur of 10 uses. The morphology of dental burs changes according to the number of uses of these, tending to wear, loss of mass and presence of undercuts by the decrease of the diamond grit. It is concluded that the repetitive use of diamond burs affects the roughness of dental structures but does not influence in a statistically significant way the bond strength. Also, more research is required to increase and achieve a more complete knowledge on the subject.
Descripción
Tesis (maestría profesional en odontología con énfasis en prostodoncia)--Universidad de Costa Rica. Sistema de Estudios de Posgrado. Programa de Estudios de Posgrado en Odontología, 2019
Palabras clave
ADHESIVOS DENTALES - INVESTIGACIONES, ODONTOLOGIA - APARATOS E INSTRUMENTOS, RESINAS COMPUESTAS