Hyoung-Hoon Jo, Ara Cho, Su-Min Lee, Bekir Karabucak, Ho-Keel Hwang
{"title":"Changes in the Location of the Second Mesiobuccal Canal Orifice After Canal Preparation in Maxillary First Molars.","authors":"Hyoung-Hoon Jo, Ara Cho, Su-Min Lee, Bekir Karabucak, Ho-Keel Hwang","doi":"10.1111/aej.70112","DOIUrl":"https://doi.org/10.1111/aej.70112","url":null,"abstract":"<p><p>This study evaluated angular and linear positional changes of the second mesiobuccal (MB2) canal orifice in maxillary first molars and proposed a guideline for its localization. Twenty-eight extracted maxillary first molars with four canals were analysed. After access cavity preparation, all canals except MB2 were instrumented. The initial and final MB2 orifice positions were defined as MB2a and MB2b, respectively, following selective dentine removal and canal preparation. Standardized microscopic images were obtained, and the angle between the MB1-MB2 and DB-P lines, as well as inter-orifice distances, were measured using paired t-tests (α = 0.05). MB2 canals were identified in all specimens. The mean angle significantly changed from -21.84° ± 8.87° to +8.38° ± 8.95° (p < 0.05), indicating a mesial shift and increased parallelism. Mean displacement was 1.07 ± 0.39 mm. A DB-P-parallel direction may aid predictable MB2 localization in maxillary first molars.</p>","PeriodicalId":55581,"journal":{"name":"Australian Endodontic Journal","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148649963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jenny Guerrero, Josué Fernández, Flávio R F Alves, José C Provenzano, Karen M Brisson-Suárez, Marília F Marceliano-Alves, Isabela N Rôças, José F Siqueira
{"title":"Effect of Kinematics and Speed on Filling Material Removal, Canal Transportation, and Apical Extrusion During Retreatment of Curved Canals.","authors":"Jenny Guerrero, Josué Fernández, Flávio R F Alves, José C Provenzano, Karen M Brisson-Suárez, Marília F Marceliano-Alves, Isabela N Rôças, José F Siqueira","doi":"10.1111/aej.70110","DOIUrl":"10.1111/aej.70110","url":null,"abstract":"<p><p>This study evaluated the effects of kinematics (reciprocating vs. continuous rotation) and rotational speed (350 vs. 1200 rpm) on filling removal, canal transportation, and apical extrusion during retreatment of curved root canals. Vertucci type II mesial roots of mandibular molars were prepared, filled, and scanned by micro-computed tomography (micro-CT). After 30 days, specimens were assigned to four groups (n = 15): WOrec, WOctn, PF350, and PF1200. Retreatment time was recorded, and micro-CT was used to assess filling removal, canal transportation, and apical extrusion. Data were statistically evaluated and revealed that all systems significantly reduced the amount of filling material (p < 0.05). PF1200 and WOctn showed superior removal compared with PF350 and WOrec, respectively (p < 0.05). No differences were observed in extrusion (p > 0.05). Increased canal transportation occurred only in the mesiolingual canal with WOctn and PF1200 (p < 0.05). Higher speed and continuous rotation improved efficiency without increasing extrusion but resulted in greater transportation.</p>","PeriodicalId":55581,"journal":{"name":"Australian Endodontic Journal","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148537805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hinrich Meijer, Louise Franchina, Poonam Nagarani, Roy George
{"title":"Impact of Chelators on FAC Following Interaction With NaOCl: A Focused Evidence Synthesis Based on a Systematic Search.","authors":"Hinrich Meijer, Louise Franchina, Poonam Nagarani, Roy George","doi":"10.1111/aej.70091","DOIUrl":"https://doi.org/10.1111/aej.70091","url":null,"abstract":"<p><p>This systematic review following PRISMA guidelines evaluated the effects of endodontic chelators on free available chlorine (FAC) in sodium hypochlorite (NaOCl), with emphasis on the influence of concentration, contact time, temperature, and pH. Risk of bias was assessed using the Quality Assessment Tool for In Vitro Studies (QUIN). Twelve in vitro studies met the inclusion criteria, all using iodometric titration to measure FAC. Seven studies had low risk of bias and five had moderate risk. Seventeen chelators were evaluated, with Na<sub>2</sub>EDTA, malic acid, citric acid, ATMA, and SmearOFF causing rapid FAC loss (> 70% within 1 min), whereas Na<sub>2</sub>EDTA, HEDP-based chelators, and several aminopolycarboxylates showed minimal FAC reduction (0%-25%). FAC degradation was influenced by chelator type, pH reduction, temperature, and exposure time. Chelator interactions can markedly reduce FAC, potentially limiting antimicrobial and tissue-dissolving efficacy. Clinicians should tailor irrigation protocols, considering chelator choice, contact time, and irrigant replenishment to optimise clinical outcomes.</p>","PeriodicalId":55581,"journal":{"name":"Australian Endodontic Journal","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148474450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Ethylenediaminedisuccinic Acid: A Bio-Friendly Chelating Agent for Smear Layer Removal, Dentine Integrity, and Sealer Penetration.","authors":"Deniz Yanık Nalbantoğlu, Burcu Yagmur, Elif Bolat","doi":"10.1111/aej.70099","DOIUrl":"https://doi.org/10.1111/aej.70099","url":null,"abstract":"<p><p>Although EDTA remains the gold standard, concerns regarding its toxicity/environmental persistence have driven the search for bio-friendly alternatives. We evaluated the effect of EDDS on microhardness, smear layer, and dentine penetration of canal sealer. Two hundred and fifteen single-rooted teeth with round morphology were used. Samples were treated with solutions for 3 min. Vickers microhardness was analysed. Final irrigation was performed: GroupET: 17%-EDTA; GroupED:15%-EDDS; GroupET/N:17%-EDTA +2.5%-NaOCl; GroupED/N:15%-EDDS +2.5%-NaOCl; GroupC:distilled-water. The smear layer was evaluated. Canals were obturated using epoxy-resin and bioceramic-sealer. Dentine penetration was analysed using confocal microscopy. One-way-ANOVA, Student's t-test, Fisher-Freeman-Halton-exact, and Wilcoxon signed-rank-test were applied. EDTA and EDDS affected microhardness, smear layer, and dentine penetration similarly (p > 0.05). Dentine penetration was higher with the bioceramic-sealer and was enhanced by NaOCl (p < 0.05). EDDS demonstrated similar results to EDTA and represents a potentially more bio-friendly chelating approach that may support more biologically/environmentally conscious irrigation strategies.</p>","PeriodicalId":55581,"journal":{"name":"Australian Endodontic Journal","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148457633","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Emily Kopec, Rosemary Lindemann, Christopher T Hogden, Oscar Rysavy, Tabitha Peter, Chandler Pendleton, Fabricio Teixeira, Robert D Bowers
{"title":"Pain and Supplemental Anaesthesia in Mandibular Molar Root Canal Therapy: A Prospective Cohort Analysis of Bone Anatomy and Diagnostic Variables.","authors":"Emily Kopec, Rosemary Lindemann, Christopher T Hogden, Oscar Rysavy, Tabitha Peter, Chandler Pendleton, Fabricio Teixeira, Robert D Bowers","doi":"10.1111/aej.70107","DOIUrl":"https://doi.org/10.1111/aej.70107","url":null,"abstract":"<p><p>Achieving profound local anaesthesia during mandibular molar root canal treatment can be challenging. This study evaluated procedural pain and supplemental anaesthesia used, considering endodontic diagnosis and buccal bone morphology. Seventy-seven patients undergoing primary root canal treatment completed a post-treatment survey questionnaire asking appointment associated questions relating to pain and fear. Providers used a standardized anaesthetic protocol with supplemental injections as needed. Data were compared with demographic, diagnostic, and radiographic variables. Supplemental anaesthesia was required in 14% of cases. Patients reported no procedural pain in the majority of cases (73%), and felt adequately numb during the procedure in nearly all cases (95%). Sixty-five percent of patients rated the experience better than expected. Buccal bone thickness showed no significant association with pain or need for supplemental anaesthesia. Overall, an inferior alveolar nerve block with lidocaine and supplemental buccal articaine infiltration achieved a high success of profound local anaesthesia.</p>","PeriodicalId":55581,"journal":{"name":"Australian Endodontic Journal","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148457750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Tomás Manuel Braz Marinho, Luiz Renato Paranhos, Anne Caroline Brito Cabral Dos Santos, Djessyca Miranda E Paulo, Rui Barbosa de Brito Júnior, João Marcos da Costa Ribeiro, Felipe de Souza Matos
{"title":"Corrigendum to 'Selective Nonsurgical Endodontic Retreatment: Relevant Aspects for Clinical Application-A Scoping Review'.","authors":"Tomás Manuel Braz Marinho, Luiz Renato Paranhos, Anne Caroline Brito Cabral Dos Santos, Djessyca Miranda E Paulo, Rui Barbosa de Brito Júnior, João Marcos da Costa Ribeiro, Felipe de Souza Matos","doi":"10.1111/aej.70092","DOIUrl":"10.1111/aej.70092","url":null,"abstract":"","PeriodicalId":55581,"journal":{"name":"Australian Endodontic Journal","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148450559","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Mehmet Emin Kaval, Fırat Sarsar, Gözde Kandemir Demirci, Seniha Miçooğullari, Deniz Inkaya, Hayal Boyacioglu, Pelin Güneri
{"title":"Comparative Evaluation of Three Artificial Intelligence-Based Tools for Question Generation in Endodontics.","authors":"Mehmet Emin Kaval, Fırat Sarsar, Gözde Kandemir Demirci, Seniha Miçooğullari, Deniz Inkaya, Hayal Boyacioglu, Pelin Güneri","doi":"10.1111/aej.70108","DOIUrl":"https://doi.org/10.1111/aej.70108","url":null,"abstract":"<p><p>This study aimed to compare the ability of three artificial intelligence-based large language models, ChatGPT-4, Copilot, and Gemini, to generate multiple-choice questions. Two position statements from the European Society of Endodontology were used as source documents. Each model produced forty questions using an identical prompt, and a total of 120 questions were assessed for distractor quality, ability to distinguish different performance levels, reliability, and content validity. Weighted Kappa, Kruskal-Wallis, and Mann-Whitney U post hoc tests were used for analysis. The inter-rater agreement ranged between 0.870 and 1.000. ChatGPT-4 produced the highest overall scores, and Gemini consistently received the lowest ratings. Overall scores differed significantly between Copilot and Gemini, and ChatGPT-4 and Gemini (p < 0.05), but all produced poorly constructed distractor options. The findings indicate that artificial intelligence-based tools can support the generation of assessment materials in endodontics; however, expert oversight remains essential to ensure accuracy, quality, and educational relevance.</p>","PeriodicalId":55581,"journal":{"name":"Australian Endodontic Journal","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148388365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yasmina Andreani, Ryan David Butler, Diana Patalwala, Paul V Abbott, Mostafa M A Elkholy
{"title":"Influence of Delivery Method of Hydraulic Calcium Silicate Cement-Based Sealer on Void Formation: A Micro-Computed Tomography Study.","authors":"Yasmina Andreani, Ryan David Butler, Diana Patalwala, Paul V Abbott, Mostafa M A Elkholy","doi":"10.1111/aej.70106","DOIUrl":"https://doi.org/10.1111/aej.70106","url":null,"abstract":"<p><p>The aim of this study was to compare three delivery methods of a hydraulic calcium silicate cement-based sealer by quantifying voids using the single-cone technique. Forty-eight human mandibular molars were instrumented and scanned using micro-computed tomography. The specimen's aspect ratio, shape, and volume were analysed to allow even distribution across three experimental groups (n = 16): sealer injection with a syringe, coating of the master cone and sealer injection followed by sonic agitation. Post-filling micro-computed scanning was used to quantify void volumes in each specimen. Statistical analysis using Kruskal-Wallis and Dunn's post hoc tests (α = 0.05) revealed no significant difference in void volume among the delivery methods (p = 0.120). However, canal shape was a significant factor; round canals exhibited significantly fewer voids than any other shape (p < 0.001). In conclusion, the delivery method did not influence the density of the root canal filling; canal anatomy was the more critical determinant factor for void formation.</p>","PeriodicalId":55581,"journal":{"name":"Australian Endodontic Journal","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148388346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"YouTube As an Information Source for Bioceramic-Based Root Canal Sealers in Endodontics: A Cross-Sectional Study.","authors":"Sevda Durust Baris, Seyma Atli, Rumeysa Betul Gumus","doi":"10.1111/aej.70105","DOIUrl":"https://doi.org/10.1111/aej.70105","url":null,"abstract":"<p><p>This study aimed to evaluate the content and quality of YouTube videos on bioceramic-based root canal sealers. A total of 43 videos were assessed using the Journal of the American Medical Association (JAMA), Global Quality Score (GQS) and Modified DISCERN (mDISCERN) measurement tools. Statistical analyses were conducted using the Kruskal-Wallis test, Spearman correlation analysis and multiple linear regression (p < 0.05). Videos uploaded by dentists had significantly higher GQS, mDISCERN, JAMA and Total Content Score (TCS) scores than those from other sources (p < 0.05). Videos with rich content showed higher GQS, mDISCERN and JAMA scores than those with poor content (p < 0.05). Although the number of comments demonstrated an individual association with GQS, the overall regression model was not statistically significant (p > 0.05). In conclusion, most videos on bioceramic-based root canal sealers were of poor to moderate quality and could have limitations in reliability.</p>","PeriodicalId":55581,"journal":{"name":"Australian Endodontic Journal","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148371013","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jun Hong Tan, Safura Anita Baharin, Lishen Wong, Eason Soo
{"title":"Micro-Computed Tomographic Evaluation of Shaping Ability of Rotary and Manual ProTaper Ultimate, WaveOne Gold and TruNatomy in Moderately Curved Canals.","authors":"Jun Hong Tan, Safura Anita Baharin, Lishen Wong, Eason Soo","doi":"10.1111/aej.70104","DOIUrl":"https://doi.org/10.1111/aej.70104","url":null,"abstract":"<p><p>This study compared the shaping ability of rotary ProTaper Ultimate (rPTUL), manual ProTaper Ultimate (mPTUL), WaveOne Gold (WOG) and TruNatomy (TRU) in moderately curved mandibular molar canals using micro-computed tomography. Forty roots (10°-30° curvature) were divided into four groups (n = 10). Pre- and post-instrumentation scans evaluated canal volume change, percentage of unprepared surface area, transportation and centreing ratios at 3, 5 and 7 mm from the apex. Results showed no significant differences in volumetric changes between rPTUL, mPTUL and WOG (p > 0.05); however, TRU removed significantly less dentine (p < 0.05). TRU also exhibited a significantly higher percentage of unprepared surface area compared to other groups (p < 0.05). No significant differences were found in transportation or centreing ratios among all systems. While TRU best preserved dentine, it left more canal surface unprepared, mPTUL proved a practical alternative to engine-driven systems, with all files demonstrating safe performance.</p>","PeriodicalId":55581,"journal":{"name":"Australian Endodontic Journal","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148371024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}