Fracture resistance of different post-core systems restoring mandibular premolars

Document Type : Original Article

Authors

1 fixed prosthodontics department, faculty of dentistry, Ain Shams Uni., Cairo, Egypt.

2 Fixed prosthodontics department, Faculty of dentistry, Ain Shams Uni., Cairo, Egypt

Abstract

Objective : This in vitro study aimed to Compare the fracture resistance between Milled Custom-made PEEK post and core, Pressed custom-made PEEK post and core and Customized fiber post and composite core.
Methodology: A total of 21 human mandibular premolar teeth with similar root form and root canal shape averaging cervico-occlusal length of the crown about 8+/-0.5 mm and 14.5+/-0.5 mm for root length were collected for this study , endodontic treatment was performed for all teeth followed by coronal decapitation 2mm above CEJ and post space preparation , After the preparation of each root, the corresponding teeth were allocated randomly to three groups (n=7/ group) according to the type of material and fabrication technique used to generate the post-and-core : GM, milled PEEK post and core; GP, pressed PEEK post and core; GC, customized fiber post and composite core .
Results: There was a significant difference between different groups (p < 0.001). PEEK milled group showed the highest mean value (1055.25±119.31) followed by PEEK pressed group (963.39±117.28) while customized fiber post group (625.85±69.69) showed the lowest mean value.
Conclusion: On the basis of the results and conditions of this study, the following conclusions can be drawn:
1. PEEK post and core made by two fabrication techniques have surpassed the fracture resistance values of customized fiber post.
2. With the widespread of in-office CAD/CAM systems, milled PEEK may represent viable alternative for dental post materials according to the tested parameters.

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Mansoura Journal of Dentistry

Articles in Press, Accepted Manuscript
Available Online from 09 April 2022

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