ArticleJournal of conservative dentistry and endodontics2025
Quantitative analysis of troughing depth for successful instrument retrieval using the loop technique: A cross-sectional
Article in Journal of conservative dentistry and endodontics, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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Who cites it
2 citing papers in PubMed.
- Evaluation of different methods for separated file retrieval from the apical third of curved root canals:Journal of conservative dentistry and endodontics · 2026Article
- Single-step integrated minimally invasive static-guided microsurgery for file retrieval from the periapex of mandibular molar.Journal of conservative dentistry and endodontics · 2025Article
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Authors and funding
4 authors.
Funding
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Abstract
Introduction: Fractured endodontic instruments complicate root canal treatment by obstructing cleaning and shaping. The loop technique is a widely used retrieval method, but the optimal depth of dentin troughing required for successful retrieval remains unclear. Insufficient troughing can lead to failed attempts, wasted materials, and operator fatigue, whereas excessive troughing may increase chair side time, cause dentin loss, and lead to iatrogenic errors. Aim: The aim of the study was to evaluate the depth of dentin troughing required for successful retrieval of fractured endodontic instruments using the loop technique and to analyze secondary outcomes, including retrieval time and success rates. Materials and Methods: This cross-sectional Statistical Analysis: Data obtained were statistically analyzed using ANOVA, paired samples test. Results: The mean troughing depth was significantly greater for rotary instruments (0.42 mm ± 0.25 mm) than for hand instruments (0.28 mm ± 0.18 mm). The overall success rate was 98.3%, with no significant difference between rotary (97.4%) and hand instruments (100%). Retrieval time was significantly longer for rotary instruments (46.2 ± 3.2 min) than for hand instruments (32.4 ± 2.4 min, Conclusion: Rotary instruments require deeper troughing and longer retrieval times compared to hand instruments. This study provides evidence-based guidance for optimizing fractured instrument retrieval while preserving tooth structure and minimizing procedural risks.
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