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Introduction: Teeth with a final post-endodontic restoration cannot support significant structural loss brought on by fracture, caries, big pre-existing restorations, or aggressive cavity preparation. Post and core restoration allows for the restoration of such teeth. Reduced dentine size, moisture, and compromise on supporting structures such the oblique bridge, marginal ridges, and pulp chamber roof result in a reduction in their resistance because of structural loss. Under such circumstances, choosing a good post-endodontic restorative material can be difficult.

Materials and Methods:

In terms of post-treatment procedures, 40 single-rooted decoronated mandibular premolar teeth were endodontically treated and randomly divided into four groups. As a control, the first group had a composite core but no post; groups two and three had prefabricated metal threaded posts; group four had prefabricated hybrid posts. The posts were affixed using dual-cure resin cement, and the core build-up material was nano composite. Each group's core structure was standardised, and metal crowns of the same size were used to reinforce it. A universal testing machine was used to test every specimen, and the fracture load was tabulated.

Statistical analysis used: one way ANOVA analysis

Results: The highest failure load was found with prefabricated hybrid post. This group had significantly higher load compared to other post groups. Followed by prefabricated fibre post and prefabricated metal threaded post.

Conclusions: Fracture resistance of endodontically treated teeth reinforced with hybrid post showed significant values when compared to that of prefabricated glass fiber posts, prefabricated threaded post and control teeth.