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Microcracking in Concrete

Microcracking in Concrete

Microcracking in concrete refers to the tiny cracks that can form within the material even before any external load is applied. These microcracks typically occur at the interface between the coarse aggregate and the hydrated cement paste, often as a result of differential volume changes prompted by variations in stress-strain behavior, as well as thermal and moisture movement. Initially, these microcracks remain stable and do not grow substantially until the concrete is stressed to about 30...

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Assessing Dentinal Microcracks using Micro-CT after Root Canal Preparation with Different Rotary Endodontic File

Mohammed Mustafa¹, Kailash Attur¹, Sidharth S Menon¹

¹Department of Conservative Dentistry and Endodontics, Narsinhbhai Patel Dental College and Hospital, Sankalchand Patel University, Visnagar, Gujarat, India.

Journal of Pharmacy & Bioallied Sciences

|February 10, 2025

Summary

This summary is machine-generated.

This study compared dentinal microcrack propagation in root canals using TruNatomy and MicroMega ONE RECI file systems. Both rotary endodontic systems showed similar effects on dentin integrity, with no significant differences in microcrack formation.

Keywords:

Continuous rotation TruNatomy dentinal microcracks micro-CT micromega ONE RECI reciprocating motion root canal preparation rotary endodontic files

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Area of Science:

Endodontics
Dental Materials Science
Biomaterials Engineering

Background:

Root canal preparation aims to clean and shape the root canal system.
Dentinal microcracks can form or propagate during root canal preparation, potentially compromising tooth integrity.
Evaluating the impact of different rotary endodontic file systems on dentinal microcracks is crucial for clinical decision-making.

Purpose of the Study:

To compare the propagation of dentinal microcracks in mesiobuccal (MB) and mesiolingual (ML) canals after preparation with TruNatomy (continuous rotation) and MicroMega ONE RECI (reciprocating motion) systems.
To assess the effectiveness of both systems in enlarging canals using micro-computed tomography (micro-CT).

Main Methods:

Fifty human mandibular molars with Vertucci Type IV canal configurations were selected.
Root canal preparation was performed in MB and ML canals using TruNatomy and MicroMega ONE RECI systems.
Micro-computed tomography (micro-CT) was used for pre- and post-preparation scans to analyze dentinal microcracks and canal volume.

Main Results:

No statistically significant differences in dentinal microcrack formation or propagation were observed between the TruNatomy and MicroMega ONE RECI systems.
Microcrack prevalence was 8.0%-12.0% in the ML canal and 12.0%-8.0% in the MB canal for both systems (P = 0.643).
Both systems significantly increased canal volume without significant differences between them (P < 0.001).

Conclusions:

TruNatomy and MicroMega ONE RECI systems exhibit comparable outcomes regarding dentinal microcrack formation and propagation.
Both systems effectively enlarge root canals while preserving natural anatomy.
Clinical selection between these systems can be based on ease of use and efficiency, given their similar mechanical effects on dentin integrity.