“Distribución de tensiones de endocoronas anteriores mediante análisis de elementos finitos”
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Date
2024
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Universidad Nacional de Trujillo
Abstract
Hasta la fecha, no existe un consenso claro en la literatura sobre qué diseño y a qué profundidad de
las endocorona, es la opción de tratamiento más efectiva para restaurar los incisivos centrales
superiores tratados endodónticamente.
Objetivo: Determinar la distribución de tensiones de las endocoronas anteriores mediante análisis
de elementos finitos.
Material y método: Se confeccionaron 9 modelos (grupos) de elementos finitos en 3D, cada uno
representa un sistema de restauración de los incisivos centrales superiores tratados
endodónticamente. Los modelos fueron endocoronas con y sin ferrule a 0, 1, 3 y 5 mm de profundidad
y un grupo control de poste-muñón corona. Se aplico una carga estática de 100N de fuerza en la cara
palatina a 45º del eje mayor del diente. Los valores de Von Mise y la tensión máxima en la corona,
dentina y cemento resinoso se evaluaron por separado.
Resultado: La distribución de tensiones máximas fueron C < B < A < D < H < F < E < G < I y las tensiones
de Von Mises fueron en el 1/3 superior del retenedor de las endocoronas en A, B, C y D; en el cuello
vestibular en las endocoronas E y F; en el 1/3 final del retenedor en la endocorona G; en el 1/3 medio
del retenedor en la endocorona H; y a nivel del cuello vestibular de la corona en el modelo I.
Conclusiones: La menor distribución de tensiones máximas y de Von Mises se observó en el modelo C.
To date, there is no clear consensus in the literature on which endocrown design, and to what depth, is the most effective treatment option for restoring endodontically treated maxillary central incisors. Objective: To determine the stress distribution of the anterior endocrowns by means of finite element analysis. Material and method: 9 3D finite element models (groups) were made, each representing a restoration system of endodontically treated maxillary central incisors. The models were endocrowns with and without ferrules at 0, 1, 3 and 5 mm depth and a post-core stump control group. A static load of 100N of force was applied to the palatal face at 45º from the long axis of the tooth. The Von Mise values and the maximum stress in the crown, dentin and resin cementum were evaluated separately. Result: The distribution of maximum stresses were C < B < A < D < H < F < E < G < I and the Von Mises stresses were in the upper 1/3 of the retainer of the endocrowns in A, B, C and D; in the vestibular neck in endocrowns E and F; in the final 1/3 of the retainer in the endocrown G; in the middle 1/3 of the retainer in the H endocrown; and at the level of the vestibular neck of the crown in model I. Conclusions: The smallest distribution of maximum and Von Mises stresses was observed in model C.
To date, there is no clear consensus in the literature on which endocrown design, and to what depth, is the most effective treatment option for restoring endodontically treated maxillary central incisors. Objective: To determine the stress distribution of the anterior endocrowns by means of finite element analysis. Material and method: 9 3D finite element models (groups) were made, each representing a restoration system of endodontically treated maxillary central incisors. The models were endocrowns with and without ferrules at 0, 1, 3 and 5 mm depth and a post-core stump control group. A static load of 100N of force was applied to the palatal face at 45º from the long axis of the tooth. The Von Mise values and the maximum stress in the crown, dentin and resin cementum were evaluated separately. Result: The distribution of maximum stresses were C < B < A < D < H < F < E < G < I and the Von Mises stresses were in the upper 1/3 of the retainer of the endocrowns in A, B, C and D; in the vestibular neck in endocrowns E and F; in the final 1/3 of the retainer in the endocrown G; in the middle 1/3 of the retainer in the H endocrown; and at the level of the vestibular neck of the crown in model I. Conclusions: The smallest distribution of maximum and Von Mises stresses was observed in model C.
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Keywords
Análisis Tridimensional de elementos finitos 3D, Comportamiento Biomecánico, Incisivo central maxilar, Dientes tratados endodónticamente, Endocorona, Ferrule de dentina, Profundidad de la cámara pulpar, Poste-muñón-corona