Finite element analysis of maxillary central incisors restored with various post-and-core applications / 대한치과보존학회지
Journal of Korean Academy of Conservative Dentistry
; : 324-332, 2009.
Article
en En
| WPRIM
| ID: wpr-125397
Biblioteca responsable:
WPRO
ABSTRACT
The purpose of this study was to investigate the effect of rigidity of post core systems on stress distribution by the theoretical technique, finite element stress-analysis method. Three-dimensional finite element models simulating an endodontically treated maxillary central incisor restored with a zirconia ceramic crown were prepared and 1.5 mm ferrule height was provided. Each model contained cortical bone, trabecular bone, periodontal ligament, 4 mm apical root canal filling, and post-and-core. Six combinations of three parallel type post (zirconia ceramic, glass fiber, and stainless steel) and two core (Paracore and Tetric ceram) materials were evaluated, respectively. A 50 N static occlusal load was applied to the palatal surface of the crown with a 60degrees angle to the long axis of the tooth. The differences in stress transfer characteristics of the models were analyzed. von Mises stresses were chosen for presentation of results and maximum displacement and hydrostatic pressure were also calculated. An increase of the elastic modulus of the post material increased the stress, but shifted the maximum stress location from the dentin surface to the post material. Buccal side of cervical region (junction of core and crown) of the glass fiber post restored tooth was subjected to the highest stress concentration. Maximum von Mises stress in the remaining radicular tooth structure for low elastic modulus resin core (29.21 MPa) was slightly higher than that for high elastic modulus resin core (29.14 MPa) in case of glass fiber post. Maximum displacement of glass fiber post restored tooth was higher than that of zirconia ceramic or stainless steel post restored tooth.
Palabras clave
Texto completo:
1
Base de datos:
WPRIM
Asunto principal:
Ligamento Periodontal
/
Acero Inoxidable
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Vértebra Cervical Axis
/
Diente
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Circonio
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Cerámica
/
Técnicas Psicológicas
/
Resinas Compuestas
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Análisis de Elementos Finitos
/
Coronas
Tipo de estudio:
Prognostic_studies
Idioma:
En
Revista:
Journal of Korean Academy of Conservative Dentistry
Año:
2009
Tipo del documento:
Article