# Fracture Resistance of Roots With Si̇mulated Internal Root Resorption Followi̇ng Repair With Calcium Silicate‐Based Cements

## TL;DR

This study tested how well different dental cements help prevent tooth fractures after simulated root resorption.

## Contribution

The study introduces a comparison of calcium silicate-based cements for repairing root resorption and their effect on fracture resistance.

## Key findings

- Biodentine showed significantly higher fracture resistance compared to the negative control group.
- Calcium silicate-based cements may help preserve tooth structure after internal root resorption.
- Fracture resistance was measured using compressive loading at a 135° angle.

## Abstract

This study aimed to evaluate the fracture resistance of teeth with simulated internal root resorption cavities filled with calcium silicate‐based cements (CSCs). Seventy‐two extracted central incisor teeth had their crowns removed to standardize the root length to 14 mm. The teeth were randomized into six groups (n = 12 each), including a positive control (with no simulated resorption cavities) and negative control (with no filling) group. To simulate internal root resorption cavities, cavities were made along the 6 mm section using a number 10 round bur on groups. In four groups, artificially created resorption areas were filled with ProRoot MTA, Biodentine, NeoMTA 2, and BioMTA+. The specimens were subjected to fracture resistance testing using a universal testing machine (UTC). Compressive 135° angle loading was applied to the roots at a rate of 1 mm/min. The fracture resistance was recorded in Newtons and statistically analyzed using a one‐way analysis of variance (Welch’s test) and Tamhane’s T2 test. The fracture resistance was significantly higher in the Biodentine group than in the negative control group. Therefore, the use of Biodentine in internal root resorption cavities may, to some extent, contribute to preserving or supporting the tooth structure.