# Assessment of the dentine microhardness following the application of different intracanal medicaments. An in-vitro study

## TL;DR

This study compares how different intracanal medicaments affect the hardness of root dentine in teeth, finding that some preserve it better than others.

## Contribution

The study introduces a novel comparison of modern and conventional intracanal medicaments on dentine microhardness using an in-vitro approach.

## Key findings

- Bio-C Temp and m-TAP nanofibers showed the highest dentine microhardness values.
- Calcium hydroxide had the lowest microhardness values, indicating a negative effect.
- Significant differences in microhardness were observed at the coronal and middle root levels but not apically.

## Abstract

Intracanal medications used during routine endodontic treatment and regenerative endodontic procedures might cause undesirable effects on tooth properties, such as a reduction in dentine microhardness.

To compare the effect of five intracanal medicaments; Bio-C Temp (Angelus, Brazil), modified triple antibiotic electrospun nanofibers (m-TAP) (NanoEbers, Egypt), Levofloxacin (Memphis, Egypt), Calcium hydroxide (CH) (Meta biomed, Korea) and Simvastatin (Merck & Co., USA) on the microhardness of radicular dentine.

Forty-five extracted single-rooted teeth were decoronated to a 15 mm root length then prepared. The specimens were assigned to five groups according to the used intracanal medicament: Bio-C Temp, m-TAP nanofibers, Levofloxacin, CH, and Simvastatin. After medicament application for two weeks, dentine microhardness was measured using a Vickers microhardness tester. Data were analyzed using the Kruskal–Wallis and Mann–Whitney U tests with a significance level set at p < 0.05.

Bio-C Temp, and m-TAP nanofibers recorded the highest overall dentine microhardness values, followed by Levofloxacin and Simvastatin, while CH showed the lowest. Significant differences were observed among the tested groups at the coronal and middle levels (p < 0.05), whereas no significant difference was found apically.

Bio-C Temp, and m-TAP nanofibers demonstrated superior ability to preserve dentine microhardness, suggesting their promising potential advantage over conventional medicaments for strengthening root dentine.