{"title":"Microcracks induced by XP-endo retreatment system in root canals filled with bioceramic sealer: A micro-computed tomographic analysis.","authors":"Sarah M Alkahtany","doi":"10.1007/s44445-025-00001-6","DOIUrl":null,"url":null,"abstract":"<p><strong>Purpose: </strong>Limited research has explored the impact of retreatment on dentinal microcracks in root canals filled with bioceramic (BC) sealer. The aim of the present study was to evaluate and compare microcrack formation during the removal of BC sealer using the XP-endo Retreatment (XPER) and ProTaper Universal Retreatment (PTUR) systems, employing micro-computed tomography (micro-CT) for detailed analysis.</p><p><strong>Methods: </strong>Forty human mandibular premolars with single roots were selected, cleaned, shaped, and obturated with gutta-percha and TotalFill BC sealer using the single-cone technique. After random assignment into Group 1 (PTUR system) and Group 2 (XPER system), pre-treatment micro-CT scans were done. Post-retreatment micro-CT scans were then obtained. Microcracks were quantified before and after retreatment, and statistical analysis was done using Wilcoxon Signed-Ranks, Kruskal-Wallis, and Mann-Whitney U tests (p ≤ 0.05).</p><p><strong>Results: </strong>Insignificant differences in microcrack formation were observed between the XPER and PTUR groups. While the PTUR system showed a 15% increase in microcrack formation, this change was insignificant. In contrast, after retreatment, the XPER system demonstrated a significant 45% increase in microcracks. This increase was consistent across all root levels, with the middle third showing a significantly higher number of microcracks than the apical third. Most microcracks result from the propagation of pre-existing cracks.</p><p><strong>Conclusion: </strong>The XPER system resulted in more microcracks than the PTUR system, although the difference was not statistically significant. Most microcracks observed after retreatment were propagated from pre-existing cracks, indicating that retreatment primarily exacerbates existing microcracks rather than creating new ones.</p>","PeriodicalId":47246,"journal":{"name":"Saudi Dental Journal","volume":"37 1-3","pages":"1"},"PeriodicalIF":2.3000,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12133617/pdf/","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Saudi Dental Journal","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1007/s44445-025-00001-6","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"DENTISTRY, ORAL SURGERY & MEDICINE","Score":null,"Total":0}
引用次数: 0
Abstract
Purpose: Limited research has explored the impact of retreatment on dentinal microcracks in root canals filled with bioceramic (BC) sealer. The aim of the present study was to evaluate and compare microcrack formation during the removal of BC sealer using the XP-endo Retreatment (XPER) and ProTaper Universal Retreatment (PTUR) systems, employing micro-computed tomography (micro-CT) for detailed analysis.
Methods: Forty human mandibular premolars with single roots were selected, cleaned, shaped, and obturated with gutta-percha and TotalFill BC sealer using the single-cone technique. After random assignment into Group 1 (PTUR system) and Group 2 (XPER system), pre-treatment micro-CT scans were done. Post-retreatment micro-CT scans were then obtained. Microcracks were quantified before and after retreatment, and statistical analysis was done using Wilcoxon Signed-Ranks, Kruskal-Wallis, and Mann-Whitney U tests (p ≤ 0.05).
Results: Insignificant differences in microcrack formation were observed between the XPER and PTUR groups. While the PTUR system showed a 15% increase in microcrack formation, this change was insignificant. In contrast, after retreatment, the XPER system demonstrated a significant 45% increase in microcracks. This increase was consistent across all root levels, with the middle third showing a significantly higher number of microcracks than the apical third. Most microcracks result from the propagation of pre-existing cracks.
Conclusion: The XPER system resulted in more microcracks than the PTUR system, although the difference was not statistically significant. Most microcracks observed after retreatment were propagated from pre-existing cracks, indicating that retreatment primarily exacerbates existing microcracks rather than creating new ones.
期刊介绍：
Saudi Dental Journal is an English language, peer-reviewed scholarly publication in the area of dentistry. Saudi Dental Journal publishes original research and reviews on, but not limited to: • dental disease • clinical trials • dental equipment • new and experimental techniques • epidemiology and oral health • restorative dentistry • periodontology • endodontology • prosthodontics • paediatric dentistry • orthodontics and dental education Saudi Dental Journal is the official publication of the Saudi Dental Society and is published by King Saud University in collaboration with Elsevier and is edited by an international group of eminent researchers.
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