EFFECT OF CROWN MATERIAL ON TEETH RESTORED WITH PREFABRICATED GLASS FIBRE POSTS: STRESS DISTRIBUTION

摘要

Nowadays, it is recognized that the main purpose for using prefabricated posts is the connection of the replacement for the missing coronal portion of the tooth to the remaining root structure, thereby providing retention for the crown. Prefabricated posts allow fast, cheap, and easy techniques. The aim of the present work is to ascertain the influence of crown material, using a previously validated 3D finite element model, on teeth restored with prefabricated glass fibre posts. Porcelain and enamel-like crowns were compared studying the case of a 300 N load applied on the palatal side at an angle of 30° to the radicular axis, in the vestibular direction. The model predicted similar stress distributions in both post systems. Moreover, the stresses predicted when using the porcelain crown were smaller than the ones predicted without the final crown in a previous work, thus acting as a protection. Within the limitations of this study, it can be stated that using porcelain for restoring crowns will produce an alike success rate as when using a material with properties similar to those of enamel.