Evaluation of Fracture Resistance and Failure Pattern of Endodontically Treated Teeth Restored with Polyether Ether Ketone (PEEK) Post Associated with no, 1mm and 2mm Crown Ferrule Lengths

Abstract

Background: There is constant advancement in aesthetic material used in dentistry due to constant increase in demand of aesthetics. Objectives: • “To evaluate fracture resistance and pattern of failure of ETT restored with PEEK post with no ferule.” • “To evaluate fracture resistance and pattern of failure of ETT restored with PEEK post with 1mm ferule length.” • “To evaluate fracture resistance and pattern of failure of ETT restored with PEEK post with 2mm ferule length.” • “To compare the above groups with each other.” Methods: 30 human RC treated mandibular premolar teeth with single root will be decoronated at CEJ, 1mm and 2mm above CEJ & will be prepared to receive PEEK post which will be divided into 3 groups (n = 10) according to corresponding ferrule length. After treatment of surface, post will be cemented using luting cement that is self-adhesive. Following thermocycling, they will be subjected to compressive static load at 45° angulation until there is fracture. Later analysis will be done with one-way ANOVA and Tukey’s HSD post hoc comparison test. Results: Although root canal treated tooth with higher ferrule height shows higher fracture resistance in previous studies, but it would be something interesting if the use of PEEK post can improve fracture resistance of root canal treated tooth with ferrule height less than 2mm. Conclusion: From the results of this study we will be able to conclude that if coronal dentinal structure is increased, resistance to fracture of ETT is increased remarkably.