Resistencia a la fractura de diferentes sistemas perno-muñón en dientes anteriores endodónticamente tratados
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Fecha
2012
Profesor/a Guía
Facultad/escuela
Idioma
es
Título de la revista
ISSN de la revista
Título del volumen
Editor
Universidad Andrés Bello
Nombre de Curso
Licencia CC
Licencia CC
Resumen
Introducción: los sistemas de perno-muñón han sido el tratamiento más indicado para
dientes anteriores endodónticamente tratados, debido a que permiten reconstruir la
estructura dentaria perdida y retener las coronas. No existe consenso en que material es el
más adecuado para rehabilitarlos.
Objetivos: evaluar si existen diferencias en los valores de resistencia a la fractura entre los
diferentes sistemas de perno-muñón en dientes anteriores endodónticamente tratados.
Material y método: se seleccionaron 30 dientes de cadáveres humanos anterosuperiores.
Se realizó tratamiento endodóntico a cada uno de ellos y se agruparon aleatoriamente en 3
grupos. Grupo A, fue rehabilitado con postes de fibra de vidrio reconstruido en resina. Grupo
B, con perno-muñón colado en níquel-cromo. Grupo e, con perno-muñón colado en oro.
Todos los dientes fueron restaurados con un casquete metálico. Para determinar la
resistencia y modo de fractura se utilizó una máquina de ensayo universal. Se utilizó un test
estadístico ANOVA, Tukey y chi cuadrado.
Resultados: se encontraron diferencias estadísticamente significativas en el promedio de la
resistencia a la fractura entre los tres sistemas de perno-muñón. El grupo e presentó
mayores valores promedios (1.076 N) que el grupo B (946 N) y el A (617 N). Se encontró
que el modo de fractura depende del tipo de sistema de perno-muñón.
Conclusión: los dientes rehabilitados con postes de fibra de vidrio reconstruidos con resina,
conservando un remanente de tejido coronario en toda si periferia, son una buena
alternativa al uso de los pernos muñones colados. Ante fracasos estos presentan un modo
de fractura favorable, son posibles de reparar y sus valores de resistencia a la fractura son
clínicamente aceptables frente a los requerimientos funcionales a los que están sometidos
en boca.
lntroduction: Post core systems have been the best treatment for endodontically treated anterior teeth, because these allow reconstructing lost tooth structure and preserving crowns. There is no consensus on what material is best suited to rehabilitate them. Objectives: Assessing whether there are differences in fracture resistance values between the different post-core systems used in endodontically treated anterior teeth. Material and method: A total of 30 anterior teeth were selected from human cadavers. Each tooth was endodontically treated and then randomly grouped into 3 groups. Group A was rehabilitated using glass fiber post and composite core. Cast post-core was used with Group B, while gold cast post core was the option for Group C. All teeth were restored with metal casts. To determine failure mode and fracture resistance, a universal testing machine was used. An ANOVA, Tukey's and chi-square statistical test were used. Results: Statistically significant differences were found in the average fracture resistance among the three post-core systems. Group C reported higher mean values (1,076 N) than Group B (946 N) and A (617 N). We also found that the fracture mode is dependent on the type of post-core system used. Conclusion: Teeth rehabilitated with glass fiber post and composite core, preserving a remnant of tissue at all crown periphery, are a good alternative to posts cores. These have a positive failure mode, it is possible to repair them and its fracture resistance values are clinically acceptable for the functional requirements in the mouth.
lntroduction: Post core systems have been the best treatment for endodontically treated anterior teeth, because these allow reconstructing lost tooth structure and preserving crowns. There is no consensus on what material is best suited to rehabilitate them. Objectives: Assessing whether there are differences in fracture resistance values between the different post-core systems used in endodontically treated anterior teeth. Material and method: A total of 30 anterior teeth were selected from human cadavers. Each tooth was endodontically treated and then randomly grouped into 3 groups. Group A was rehabilitated using glass fiber post and composite core. Cast post-core was used with Group B, while gold cast post core was the option for Group C. All teeth were restored with metal casts. To determine failure mode and fracture resistance, a universal testing machine was used. An ANOVA, Tukey's and chi-square statistical test were used. Results: Statistically significant differences were found in the average fracture resistance among the three post-core systems. Group C reported higher mean values (1,076 N) than Group B (946 N) and A (617 N). We also found that the fracture mode is dependent on the type of post-core system used. Conclusion: Teeth rehabilitated with glass fiber post and composite core, preserving a remnant of tissue at all crown periphery, are a good alternative to posts cores. These have a positive failure mode, it is possible to repair them and its fracture resistance values are clinically acceptable for the functional requirements in the mouth.
Notas
Tesis (Magíster en Odontología, Especialización en Rehabilitación Oral)
Palabras clave
Implantes Dentarios, Materiales Dentales, Chile