# Fracture resistance in endodontically treated teeth restored with custom-milled zirconia versus prefabricated fiber posts: An in vitro study

## TL;DR

This study compares the fracture resistance of teeth restored with custom zirconia posts versus prefabricated fiber posts.

## Contribution

The study provides new empirical evidence on the mechanical performance of custom-milled zirconia versus fiber posts in dental restorations.

## Key findings

- Custom-milled zirconia posts showed significantly higher fracture resistance than prefabricated fiber posts.
- Zirconia posts had more non-resettable failures, while fiber posts had more resettable failures.

## Abstract

The resistance to fracture of endodontically-treated maxillary central incisors restored using the custom-milled zirconia, post
group, versus the prefabricated fiber post group is of interest. Hence, sixty teeth were separated into two groups and restored similarly
and undergo static loading. Fracture resistance of zirconia post was significantly greater (809 45 19 NY 8219 on average) than fiber
post (567 26 19 NY 821). The main outcomes in the case of zirconia posts were the non-resettable failures (83 per cent), but in fiber
posts more of the outcomes were resettable (73 per cent). Thus, post selection shows trade-off with mechanical strength and ability to
repair.