Fracture resistance of simulated immature teeth restored with different modalities

TL;DR

This study compares how well different restoration methods protect simulated immature teeth from breaking, finding that a combination of MTA and a glass fiber post works best.

Contribution

The study introduces a novel comparison of reinforcement modalities for simulated immature teeth using a controlled experimental setup.

Findings

The MTA-Glass fiber post group showed the highest fracture resistance.

The unfilled control group had the lowest fracture resistance.

Combining apical MTA with a glass fiber post provided the greatest improvement in fracture resistance.

Abstract

Immature permanent teeth with thin dentinal walls are highly prone to fracture, creating a major challenge in restorative management.
Therefore, it is of interest to evaluate the fracture resistance of simulated immature teeth restored using different reinforcement
modalities. Forty extracted single-rooted human canines were standardized, simulated as immature teeth, and allocated into five groups:
MTA-Gutta percha, MTA-MTA, MTA-Biodentine, MTA-Glass fiber post, and positive control, followed by fracture testing in a Universal Testing
Machine. The MTA-Glass fiber post group demonstrated the highest fracture resistance, while the unfilled control group showed the lowest,
with significant differences between the control and most reinforced groups. Overall, MTA and Biodentine provided reinforcement, but the
combination of apical MTA and a glass fiber post yielded the greatest improvement in fracture resistance.