Influence of material and diameter of pre-fabricated posts on maxillary central incisors restored with crown
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Other documents of the author: González-Lluch, Carmen; Rodríguez Cervantes, Pablo Jesús; Sancho-Bru, Joaquin L.; Pérez-González, Antonio; Barjau Escribano, Amaya; Vergara, Margarita; Forner Navarro, Leopoldo
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comunitat-uji-handle2:10234/7035
comunitat-uji-handle3:10234/8617
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http://dx.doi.org/10.1111/j.1365-2842.2009.01989.x |
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Title
Influence of material and diameter of pre-fabricated posts on maxillary central incisors restored with crownAuthor (s)
Date
2009Publisher
WileyISSN
0305-182XType
info:eu-repo/semantics/articlePublisher version
http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2842.2009.01989.x/fullSubject
Abstract
Numerous research works have studied the effect of post-design parameters on the mechanical behaviour of restored teeth without reaching any clear conclusions. Previous works by the authors ascertained the effect of ... [+]
Numerous research works have studied the effect of post-design parameters on the mechanical behaviour of restored teeth without reaching any clear conclusions. Previous works by the authors ascertained the effect of material and post-dimensions for non-crowned restored teeth. The aim of this work was to study the effect of post-material and diameter for crowned teeth. First, an experimental fracture strength test was performed on eighteen extracted human maxillary central incisors. Teeth were decoronated, treated endodontically and restored (nine with glass fibre posts and nine with stainless steel posts). Several post-diameters were used. The final crown restoration was carried out using a reinforced glass-ceramic material. Failure loads were recorded and results were compared using the one-way anova. Secondly, the finite element technique was used to model the restored teeth and to compare the estimated stress distributions. The addition of the crown did not affect the strength of the restoration to any significant extent and post-diameter did not influence the biomechanical performance of either of the post-systems. The crown acts as a protector, thus eliminating the influence of the post-diameter that was found previously when using stainless steel posts, but it does not completely rule out the possibility of a root fracture. Significantly, lower failure loads were found experimentally for teeth restored with stainless steel posts. The stress distributions predicted by the model corroborated these findings and allowed the authors to propose the use of glass fibre posts as a more robust restorative technique. [-]
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Journal of Oral Rehabilitation, 36, 10, p. 737–747Rights
© 2009 The Authors. Journal compilation © 2009 Blackwell Publishing Ltd
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info:eu-repo/semantics/restrictedAccess
http://rightsstatements.org/vocab/InC/1.0/
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- EMC_Articles [807]