Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Influence of Delivery Method of Hydraulic Calcium Silicate Cement-Based Sealer on Void Formation: A Micro-Computed Tomography Study.

Australian endodontic journal : the journal of the Australian Society of Endodontology Inc·2026

Same author

Teaching Responsible Innovation in Endodontics: A Pedagogical Framework for Long-Term Clinical Success: A Narrative Review.

Australian endodontic journal : the journal of the Australian Society of Endodontology Inc·2026

Same author

Static Versus Dynamic Stimuli in Story Retelling: First Mentions of Main Characters in Sign Language Narratives.

Journal of speech, language, and hearing research : JSLHR·2026

Same author

How Well Are Dental Students Equipped to Handle Traumatic Dental Injuries in Children?

Australian endodontic journal : the journal of the Australian Society of Endodontology Inc·2026

Same author

Beyond Novelty: What Makes Innovative Concepts in Endodontics Clinically Responsible?

International endodontic journal·2026

Same author

Fracture Resistance of Roots With Si̇mulated Internal Root Resorption Followi̇ng Repair With Calcium Silicate-Based Cements.

International journal of dentistry·2026

Search research articles

Related Experiment Video

Updated: Feb 19, 2026

Scanning Electron Microscopic Evaluation of Surface Defects of Remover Retreatment File After Single and Multiple Uses

Scanning Electron Microscopic Evaluation of Surface Defects of Remover Retreatment File After Single and Multiple Uses

Published on: October 11, 2024

Evaluation of Dentin Defect Formation during Retreatment with Hand and Rotary Instruments: A Micro-CT Study.

Ayca Yilmaz¹, Dilek Helvacioglu-Yigit², Cansu Gur²

¹Department of Endodontics, Faculty of Dentistry, Istanbul University, Istanbul, Turkey.

|November 8, 2017

Summary

This summary is machine-generated.

Gutta-percha removal using hand or rotary instruments did not increase new dentin defects. However, existing defects may lengthen, suggesting cumulative damage from retreatment procedures.

More Related Videos

Shrinkage of Dental Composite in Simulated Cavity Measured with Digital Image Correlation

Shrinkage of Dental Composite in Simulated Cavity Measured with Digital Image Correlation

Published on: July 21, 2014

Author Spotlight: Establishing an Accurate Microhardness Testing Protocol for Craniofacial Tissues

Author Spotlight: Establishing an Accurate Microhardness Testing Protocol for Craniofacial Tissues

Published on: April 26, 2024

Related Experiment Videos

Last Updated: Feb 19, 2026

Scanning Electron Microscopic Evaluation of Surface Defects of Remover Retreatment File After Single and Multiple Uses

Scanning Electron Microscopic Evaluation of Surface Defects of Remover Retreatment File After Single and Multiple Uses

Published on: October 11, 2024

Shrinkage of Dental Composite in Simulated Cavity Measured with Digital Image Correlation

Shrinkage of Dental Composite in Simulated Cavity Measured with Digital Image Correlation

Published on: July 21, 2014

Author Spotlight: Establishing an Accurate Microhardness Testing Protocol for Craniofacial Tissues

Author Spotlight: Establishing an Accurate Microhardness Testing Protocol for Craniofacial Tissues

Published on: April 26, 2024

Area of Science:

Dentistry
Endodontics
Materials Science

Background:

Dentin defects can compromise root canal treatment integrity.
Gutta-percha removal is a common retreatment procedure.
Understanding instrument-induced defects is crucial for clinical success.

Purpose of the Study:

To compare dentin defect incidence and propagation after gutta-percha removal using hand versus rotary instruments.
To evaluate the effect of retreatment techniques on existing and new dentin defects.

Main Methods:

Microcomputed tomography (micro-CT) was used to analyze 20 mandibular incisors before and after gutta-percha removal.
Gutta-percha was removed using ProTaper Universal Retreatment (PTUR) or hand instruments.
24,120 cross-sectional images were analyzed for defect presence, type, and longitudinal changes.

Main Results:

No significant difference in new dentin defect formation was found between hand and rotary instrument groups.
Defects were more prevalent in the apical and middle root portions compared to the coronal portion.
Longitudinal propagation of existing defects was observed in some cases, particularly with PTUR instruments.

Conclusions:

Gutta-percha removal itself did not significantly increase the incidence of dentin defects.
Longitudinal defect propagation suggests potential cumulative damage from retreatment, highlighting the need for careful instrumentation.
Both hand and rotary instrumentation techniques resulted in comparable dentin defect formation during root canal retreatment.