Journal of conservative dentistry and endodontics最新文献

{"title":"Microstructural and elemental characterization of novel bioactive glass bioceramic sealer using Fourier transform infrared and X-ray diffraction analysis.","authors":"Poulomi Guha, Pradeep Solete, Delphine Antony, Nishitha Arun, Mohmed Isaqali Karobari, Surendar Ramamoorthi","doi":"10.4103/JCDE.JCDE_4_25","DOIUrl":"10.4103/JCDE.JCDE_4_25","url":null,"abstract":"<p><strong>Introduction: </strong>The success of endodontic therapy is primarily determined by effective root canal obturation and complete bacterial eradication. Recently, bioceramic sealers have gained significant attention in root canal treatments due to their bioactive and biocompatible properties. This study aims to characterize a novel bioactive glass-based bioceramic sealer, utilizing X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy to evaluate its bioactivity and hydroxyapatite-forming potential.</p><p><strong>Methodology: </strong>Characterization of the material involved XRD to identify crystalline phases, while FTIR was employed to detect functional groups. The synthesized powder was sieved and pressed into discs for FTIR analysis, with XRD analysis conducted on the sieved powder.</p><p><strong>Results: </strong>XRD analysis revealed nanoscale crystalline features, indicating a complex multiphase composition. FTIR identified silicate networks, hydroxyl groups, and carbonate species, supporting the material's bioactivity and its potential to form hydroxyapatite.</p><p><strong>Conclusion: </strong>The bioactive glass-based bioceramic sealer shows strong potential for dental and orthopedic use. Its nanoscale crystalline structure and silicate network enhance bioactivity and mechanical strength, while hydroxyl and carbonate groups promote tissue integration and hydroxyapatite formation. Further <i>in vivo</i> and <i>in vitro</i> studies are needed to confirm its clinical effectiveness.</p>","PeriodicalId":516842,"journal":{"name":"Journal of conservative dentistry and endodontics","volume":"28 5","pages":"412-419"},"PeriodicalIF":0.0,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12129286/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144218105","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Prevalence of <i>Enterococcus faecalis</i> in refractory endodontic infections: A microbiological study.","authors":"Jyoti Sharma, Swaty Jhamb, Manjula Mehta, Jagat Bhushan, Sonia Bhonchal Bhardwaj, Amandeep Kaur","doi":"10.4103/JCDE.JCDE_871_24","DOIUrl":"10.4103/JCDE.JCDE_871_24","url":null,"abstract":"<p><strong>Background: </strong>Root canal treatment (RCT) failure occurs due to persistent infections, missed canals, or anatomical complexities, with <i>Enterococcus faecalis</i> being the predominant microorganism associated with treatment failure. This study aimed to determine the prevalence of <i>E. faecalis</i> in failed root canal cases and its correlation with clinical parameters.</p><p><strong>Materials and methods: </strong>A cross-sectional study was conducted on 50 patients aged 18-50 years requiring nonsurgical endodontic retreatment. Samples were collected using sterile paper points, gutta-percha, and oral swabs. Clinical data such as age, gender, tooth location, and radiographic findings were documented.</p><p><strong>Results: </strong>All samples exhibited polymicrobial infections. <i>E. faecalis</i> was the most prevalent species predominantly isolated using paper points. Other organisms included <i>Streptococcus</i> spp., <i>Candida</i> spp., and <i>Escherichia coli</i>. Oral swabs showed lower detection rates for <i>E. faecalis</i> as compared to other samples for microbial isolation, Gram-positive bacteria (86%) dominated, followed by Gram-negative bacteria (8.3%) and yeast (5%). The findings confirm <i>E. faecalis</i> as the most prevalent microorganism in failed RCT cases. Its resilience, ability to form biofilms, and resistance to conventional treatment contribute to persistent infections. No significant correlation was observed between bacterial prevalence and demographic factors or tooth position. Differences in microbial detection rates among sampling methods emphasize the importance of multiple sampling approaches for accurate microbial recovery.</p><p><strong>Conclusion: </strong><i>E. faecalis</i> is highly prevalent in refractory endodontic infections, underscoring its role in treatment failure. The use of sterile paper points and gutta-percha samples effectively detects intracanal microbes. Advanced molecular techniques may further improve the understanding of endodontic microbiota and help reduce failure rates.</p>","PeriodicalId":516842,"journal":{"name":"Journal of conservative dentistry and endodontics","volume":"28 5","pages":"462-467"},"PeriodicalIF":0.0,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12129294/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144218106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Antibacterial efficacy of herbal extracts as photosensitizers in photodynamic root canal disinfection.","authors":"Syeda Saadiya Saba, Sheetal Ghivari, Madhu Pujar, Ulka Maggavi","doi":"10.4103/JCDE.JCDE_66_25","DOIUrl":"10.4103/JCDE.JCDE_66_25","url":null,"abstract":"<p><strong>Context: </strong>Photodynamic root canal disinfection is a valuable adjunct in endodontics. However, the standard photosensitizer often causes tooth discoloration. Natural photosensitizers, such as curcumin (CUR) and <i>Beta vulgaris</i> (BV), can be explored for their antimicrobial efficacy against <i>Enterococcus faecalis</i> biofilms.</p><p><strong>Aims: </strong>This study evaluates the antibacterial effectiveness of BV extract as a photosensitizer in antimicrobial photodynamic therapy (aPDT) against <i>E. faecalis</i> biofilms, comparing it to CUR and toluidine blue (TB).</p><p><strong>Settings and design: </strong>A comprehensive study protocol outlining the objectives and methodologies was submitted to the Institutional Ethics Committee and received ethical approval (Approval No. 2024-25/1114).</p><p><strong>Subjects and methods: </strong>Fifty-six single-rooted extracted teeth were prepared using Protaper Gold to #F3, irrigated with 3% sodium hypochlorite (NaOCl), and finalized with 17% ethylenediaminetetraacetic acid. The teeth were contaminated with <i>E. faecalis</i> suspension and divided into seven groups: NaOCl alone (positive control), NaOCl with TB, CUR, or BV; <i>B. Vulgaris</i> alone; CUR solvent alone; and Saline (negative control). Photosensitizers (0.5 mg/mL) were activated with a 640 nm diode laser for 120 s. Bacterial load was assessed through colony-forming unit counts.</p><p><strong>Statistical analysis used: </strong>Data were subjected to statistical analysis using SPSS v22, with analysis of variance and <i>post hoc</i> Tukey's tests (<i>P</i> < 0.05).</p><p><strong>Results: </strong>NaOCl combined with CUR-PDT showed the highest CFU reduction, followed by NaOCl with TB and BV. Nonphotoactivated photosensitizers were less effective in comparison.</p><p><strong>Conclusions: </strong>Photoactivated CUR and BV extracts demonstrated superior antimicrobial activity compared to their nonphotoactivated forms, suggesting their potential as alternative photosensitizers in aPDT.</p>","PeriodicalId":516842,"journal":{"name":"Journal of conservative dentistry and endodontics","volume":"28 5","pages":"420-425"},"PeriodicalIF":0.0,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12129290/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144218044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment of anatomical contacts and contours of class II restorations using four different dental matrix systems: An <i>in vitro</i> comparative analysis.","authors":"Deva Nanda Panda, Mamta Kaushik, Neha Mehra, Neha Verma, Aishwarya Dwivedi","doi":"10.4103/JCDE.JCDE_143_25","DOIUrl":"10.4103/JCDE.JCDE_143_25","url":null,"abstract":"<p><strong>Context: </strong>The assessment of reestablishment of correct anatomic contour and proximal tightness with minimal gingival overhang of a class II restoration.</p><p><strong>Aim: </strong>This <i>in vitro</i> study evaluated and compared the gingival overhang, contact, and contour anatomy achieved by four matrix systems for class II restorations.</p><p><strong>Materials and method: </strong>Standardized class II mesio-occlusal conservative cavities were prepared on two hundred typodont teeth and assigned into four groups (<i>n</i> = 50): Tofflemire, U Band system, Palodent V3 matrix system, and Walser Matrix system. The cavities were restored with composite and qualitatively analyzed for proximal contact tightness. The morphology of the overhang and contour was assessed using a Medit scanner and Mesh Labs by superimposition.</p><p><strong>Statistical analysis used: </strong>Kruskal-Wallis nonparametric test of significance and Mann-Whiteny <i>U</i>-test for pair-wise comparison was used.</p><p><strong>Results: </strong>The restorations showed statistically significant difference, with Walser matrix system and U Band demonstrating minimal overhang. No significant difference was observed for contact tightness among the groups (<i>P</i> = 0.109). Contours were assessed at the occlusal, middle, and cervical thirds. The Walser matrix system provided the best gingival contour (<i>P</i> = 0.000). The Palodent V3 matrix yielded the best contour at the middle (<i>P</i> = 0.002) and occlusal (<i>P</i> = 0.036) third with minimum deviation from optimal contour.</p><p><strong>Conclusions: </strong>The sectional precontoured matrix system Palodent V3 system recreated the best proximal contour and contact anatomy, while minimal overhang was generated by the Walser matrix.</p>","PeriodicalId":516842,"journal":{"name":"Journal of conservative dentistry and endodontics","volume":"28 5","pages":"449-455"},"PeriodicalIF":0.0,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12129280/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144218045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of dynamic cyclic fatigue resistance of different endodontic nickel-titanium instruments with different sterilization methods: An <i>in vitro</i> study.","authors":"Neeta Patel, Akshayraj Kantilal Langaliya, Shwetika Patel, Anjali Kairav Kothari, Gunja Malaviya, Siddharth Yadav","doi":"10.4103/JCDE.JCDE_767_24","DOIUrl":"https://doi.org/10.4103/JCDE.JCDE_767_24","url":null,"abstract":"<p><strong>Aim: </strong>This study aimed to evaluate the influence of autoclave sterilization on the cyclic fatigue resistance of nickel-titanium (NiTi) endodontic files with different NiTi alloy treatments.</p><p><strong>Materials and methodology: </strong>The research examined Hyflex CM, Bassi Logic, TruNatomy, and ProTaper Gold files, which were divided into control, conventional sterilization, and flash sterilization groups. Poststerilization, the instruments were tested using a custom-made Dynamic Cyclic Fatigue Testing Device replicating root canal procedures. Group 1 used HyFlex CM (size 25, taper 0.04), Group 2 used Bassi Logic (size 25, taper 0.04), Group 3 used TruNatomy (size 25, taper 0.04), and Group 4 used ProTaper Gold (size F1). After rotating each instrument until it fractured, the number of cycles to failure was determined and the time to fracture was noted.</p><p><strong>Statistical analysis: </strong>Statistical analysis was conducted using SPSS 26.0 (Statistical software developed by IBM) with one-way ANOVA and Tukey honestly significant difference <i>post hoc</i> tests.</p><p><strong>Results: </strong>HyFlex CM had the highest fracture resistance, whereas ProTaper Gold had the lowest. Sterilization increased the cyclic fatigue resistance of HyFlex CM, Bassi Logic, and ProTaper Gold but decreased that of TruNatomy.</p><p><strong>Conclusion: </strong>The study concluded that sterilization enhances cyclic fatigue resistance, except for TruNatomy files, and emphasized understanding NiTi alloy properties to mitigate instrument failure.</p>","PeriodicalId":516842,"journal":{"name":"Journal of conservative dentistry and endodontics","volume":"28 4","pages":"314-318"},"PeriodicalIF":0.0,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12037128/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144061091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparative evaluation of canal transportation and centering ratio of different nickel-titanium rotary file systems in curved canals using cone-beam computed tomography: An <i>in vitro</i> study.","authors":"Yashika Negi, Rohit Sharma, Abhinay Agarwal, Sheersh Gupta, Ashwani Singh, Sajal Jain","doi":"10.4103/JCDE.JCDE_28_25","DOIUrl":"https://doi.org/10.4103/JCDE.JCDE_28_25","url":null,"abstract":"<p><strong>Context: </strong>Shaping, in curved canals, is challenging due to tendency of instruments to alter curvature, resulting in procedural errors. The ability of shaping an instrument can be evaluated with variables such as transportation of canal and centering ratio (CR). Manufacturers constantly introduce newer Ni-Ti rotary instruments with optimized properties, due to which clinicians constantly need to evaluate, to be able to select better systems.</p><p><strong>Aim: </strong>The aim of this study was to compare and evaluate CR and canal transportation (CT) after instrumentation of curved canals with TruNatomy (TRN), twisted file (TF), and one curve (OC) systems using cone-beam computed tomography (CBCT).</p><p><strong>Materials and methods: </strong>Fifty-one freshly extracted mandibular molars with curved mesiobuccal canals were selected and arbitrarily allocated into three groups - TRN, OC, and TF. Their CBCT scans prior to as well as after the canal instrumentation were recorded at three cross-sectional axial levels - 2 mm, 5 mm, and 8 mm from apical exit to determine and compare CT and CR by measurements taken from distal and mesial directions.</p><p><strong>Statistical analysis used: </strong>Data were compared and analyzed statistically with the help of one-way analysis of variance along with by post hoc analysis.</p><p><strong>Results: </strong>All three groups performed similarly, with no statistical difference with regard to transportation of canal along with centering ability (<i>P</i> > 0.005). TRN showed the least CT at three cross-sectional levels. For CR, TRN performed better at 2 mm, whereas OC centered better at 5 mm and 8 mm from the apex. Results, however, were nonsignificant.</p><p><strong>Conclusions: </strong>All file systems were able to maintain and conserve the original anatomical curvature of the root canal along with minimal transportation and were able to remain centered while preparing curved canals.</p>","PeriodicalId":516842,"journal":{"name":"Journal of conservative dentistry and endodontics","volume":"28 4","pages":"355-359"},"PeriodicalIF":0.0,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12037130/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144045701","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Biomimetic remineralization of enamel and dentin with chicken eggshell slurry: An <i>in vitro</i> study.","authors":"Nainy Jain, Darshana Devadiga, Rahul D Rao, Lavanya Anumula, Sameep Shetty, Aditya Ingle","doi":"10.4103/JCDE.JCDE_67_25","DOIUrl":"https://doi.org/10.4103/JCDE.JCDE_67_25","url":null,"abstract":"<p><strong>Context: </strong>In the light of escalating focus on preventive and minimally invasive dental practices, this study explores the potential of chicken eggshell powder (CESP) as an eco-friendly source of calcium and bioactive compounds for remineralization of demineralized dental substrates.</p><p><strong>Aims: </strong>The aims of this study were to characterize and evaluate the remineralization potential of CESP slurry on demineralized human permanent teeth.</p><p><strong>Subjects and methods: </strong>CESP was prepared from chicken eggshell using calcination procedure followed which CESP slurry was prepared. The CESP powder was characterized using Fourier transform infrared spectroscopy (FTIR) analysis. Twenty-four intact human third molars were collected and sectioned, randomly allocated into two groups (<i>n</i> = 96): G1 - enamel (E) and G2 - dentin (D) which were further divided into the following six subgroups (<i>n</i> = 16) based on the intended surface treatment: E1 (sound enamel-control), E2 (demineralized enamel with no treatment), and E3 (enamel treated with CESP), D1 (sound dentin-control), D2 (demineralized dentin with no treatment), and D3 (dentin treated with CESP). All enamel and dentin blocks except those in Group E1 and D1 were immersed in a demineralizing solution for 72 h. E3 and D3 were subjected to the application of CESP slurry twice daily for a week by gentle rubbing for 2 min. All samples underwent pH-cycling and were tested using a Vickers hardness tester and scanning electron microscopy analysis.</p><p><strong>Statistical analysis used: </strong>Tukey's honestly significant difference test and paired samples test were used for statistical analysis (<i>P</i> < 0.005).</p><p><strong>Results: </strong>FTIR analysis of CESP revealed notable peaks in the range of 1400-1500 cm^-1 and sharp peaks around 1000-700 cm^-1, a feature commonly observed in calcium carbonate. A significantly higher mean % recovery of surface microhardness (%RSMH) was seen as compared to the mean % decrease in surface microhardness (%DSMH) in enamel with a mean difference ofcm-13.32 ± 4.0 (<i>P</i> = 0.000), whereas, in the case of dentin, a significantly higher mean % DSMH was seen as compared to mean % RSMH with a mean difference of 61.47 ± 3.7 (<i>P</i> = 0.000).</p><p><strong>Conclusions: </strong>The elevated pH of the chicken eggshell solution, coupled with the abundant bioavailable calcium content, holds the potential to favor remineralization. The findings suggest that the application of CESP slurry could contribute to the remineralization process.</p>","PeriodicalId":516842,"journal":{"name":"Journal of conservative dentistry and endodontics","volume":"28 4","pages":"349-354"},"PeriodicalIF":0.0,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12037129/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144039743","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparison of peri-cervical dentin on conservative and conventional access cavity designs with waveone gold and hyflex electrical discharge machining instrumentation using cone-beam computed tomography - An <i>in vitro</i> study.","authors":"P Karunakar, M S Ranga Reddy, Basa Srinivas Karteek, Chavva Lakshmi Charan Reddy, Chigurupati Swetha, Gudladona Sai Pranavi","doi":"10.4103/JCDE.JCDE_11_25","DOIUrl":"https://doi.org/10.4103/JCDE.JCDE_11_25","url":null,"abstract":"<p><strong>Background and aim: </strong>Successful endodontic therapy depends on multiple factors, with root canal preparation being a critical step in the process. Maintaining the natural anatomy of the root canal system during biomechanical preparation is important. Deviation from the canal's original morphology can lead to complications, such as canal aberrations, including transportation. Proper attention to canal preparation techniques and advanced file systems can help preserve the canal's natural curvature, ensuring effective treatment and reducing the possibility of errors in procedure. This research compares and assesses the effects of two single-file systems, waveone gold and hyflex electrical discharge machining (EDM), through the use of cone-beam computed tomography (CBCT) on peri-cervical dentin (PCD).</p><p><strong>Materials and methods: </strong>Forty mandibular molar teeth that were extracted were selected and prepared using both rotary and reciprocating single-file systems. The teeth were grouped into four categories with each containing ten teeth. CBCT scans were performed before and following the instrumentation to assess the remaining PCD thickness. An independent t-test with a 5% significance level was used to evaluate the data.</p><p><strong>Results: </strong>The findings indicated that the two systems differed statistically significantly, with the rotary system preserving more PCD (2.57 ± 0.03 mm) than the reciprocating system (2.45 ± 0.04 mm).</p><p><strong>Conclusion: </strong>The study results indicated that the Hyflex EDM single file system proved to be more effective in preserving PCD. However, additional studies are required to thoroughly assess the impact of Ni-Ti rotary single file systems on remaining dentin thickness.</p>","PeriodicalId":516842,"journal":{"name":"Journal of conservative dentistry and endodontics","volume":"28 4","pages":"331-335"},"PeriodicalIF":0.0,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12037124/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144059651","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluating the influence of different irrigation needles on the apical cleaning efficacy of endodontic irrigation - An <i>in vitro</i> study.","authors":"P Raja Rajeswari, A Andamuthu Sivakumar, J S Sivakumar, J Saravanapriyan Soundappan, M Chittrarasu, A Aravindhkumar","doi":"10.4103/JCDE.JCDE_40_25","DOIUrl":"https://doi.org/10.4103/JCDE.JCDE_40_25","url":null,"abstract":"<p><strong>Context: </strong>Irrigation is an essential part of a successful root canal treatment.</p><p><strong>Aim: </strong>This study evaluates and compares the influence of three different double-sided vented irrigation needle gauges (G) (27G, 30G, and 31G) on the apical cleaning effectiveness of endodontic irrigation using radiovisiography.</p><p><strong>Settings and design: </strong>A thorough protocol describing the objectives and methodologies of the study was submitted to the Institutional Ethics Committee, Vivekanandha Dental College for Women. Ethical clearance no. VDCW/IEC/340/2023.</p><p><strong>Subjects and methods: </strong>Forty-five human mandibular premolars were extracted, filled with a radiopaque medium, and subjected to irrigation with three varying sizes of double-sided vented irrigation needles. Preirrigation and postirrigation radiographic images were digitally subtracted to assess the cleaned areas.</p><p><strong>Statistical analysis used: </strong>Statistical analysis was carried out with SPSS version 27. For the purpose of intergroup comparisons, one-way analysis of variance was implemented, followed by the execution of the Tukey honestly significant difference post hoc test. Throughout the comparisons, <i>P</i> < 0.05 was deemed statistically significant.</p><p><strong>Results: </strong>Maximum cleaning was observed in 31G double-sided vented irrigation needles, followed by 30G and 27G double-sided vented irrigation needles.</p><p><strong>Conclusions: </strong>The 31G double-sided vented irrigation needles exhibit a higher level of effectiveness in the cleansing of the apical third of the root canal system in comparison to the other two irrigation needle variants.</p>","PeriodicalId":516842,"journal":{"name":"Journal of conservative dentistry and endodontics","volume":"28 4","pages":"336-342"},"PeriodicalIF":0.0,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12037119/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144047558","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparative analysis of pericervical dentin reduction using three rotary file systems: A micro-computed tomography study.","authors":"Anuradha Patil, Rutuja Rajput, V Sumanthini Margasahayam, Divya Naik, Jimish Shah, Manasi Surwade","doi":"10.4103/JCDE.JCDE_107_25","DOIUrl":"https://doi.org/10.4103/JCDE.JCDE_107_25","url":null,"abstract":"<p><strong>Background: </strong>Maintaining pericervical dentin (PCD) thickness is crucial for the long-term prognosis of endodontically treated teeth. Root fractures are closely linked to PCD loss, which is influenced by the type of rotary file system used.</p><p><strong>Aims: </strong>This study compared the effect of three rotary file systems - TruNatomy, OneShape, and ProTaper Gold - on PCD thickness in the mesiobuccal root of mandibular molars using micro-computed tomography (micro-CT).</p><p><strong>Materials and methods: </strong>Twenty-seven mandibular first molars were mounted on wax and scanned using micro-CT before and after instrumentation. Samples were randomly divided into three groups (<i>n</i> = 9) and instrumented per manufacturer guidelines. PCD thickness was measured at 2 mm and 4 mm below the cementoenamel junction (CEJ) on mesial, distal, buccal, and lingual surfaces. Data were analyzed using a paired t-test, one-way analysis of variance, and Tukey's post hoc test (<i>P</i> < 0.05).</p><p><strong>Results: </strong>No significant difference was observed at 4 mm below the CEJ. However, TruNatomy showed significantly less dentin removal at 2 mm (<i>P</i> = 0.003).</p><p><strong>Conclusions: </strong>TruNatomy preserved the most dentin, followed by ProTaper Gold and OneShape. Selecting appropriate rotary instruments can help minimize dentin loss and enhance the longevity of endodontically treated teeth.</p>","PeriodicalId":516842,"journal":{"name":"Journal of conservative dentistry and endodontics","volume":"28 4","pages":"377-383"},"PeriodicalIF":0.0,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12037117/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144059649","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}