Márcia Luciana Carregosa Santana, Gabriella de Jesus Santos Livi, André Luis Faria-E-Silva
{"title":"Color discrepancy of single-shade composites at different distances from the interface measured using cell phone images.","authors":"Márcia Luciana Carregosa Santana, Gabriella de Jesus Santos Livi, André Luis Faria-E-Silva","doi":"10.5395/rde.2024.49.e7","DOIUrl":"10.5395/rde.2024.49.e7","url":null,"abstract":"<p><strong>Objectives: </strong>This study aimed to evaluate the impact of substrate color and interface distance on the color adjustment of 2 single-shade composites, Vittra APS Unique and Charisma Diamond One.</p><p><strong>Materials and methods: </strong>Dual disc-shaped specimens were created using Vittra APS Unique or Charisma Diamond One as the center composite, surrounded by shaded composites (A1 or A3). Color measurements were taken with a spectrophotometer against a gray background, recording the color coordinates in the CIELAB color space. Illumination with a light-correcting device and image acquisition using a polarizing filter-equipped cell phone were performed on specimens over the same background. Image processing software was used to measure the color coordinates in the center and periphery of the inner composite and in the outer composite. The color data were then converted to CIELAB coordinates and adjusted using data from the spectrophotometer. Color differences (ΔE<sub>00</sub>) between the center/periphery of single-shade and outer composites were calculated, along with color changes in single-shade composites caused by different outer composites. Color differences for the inner composites surrounded by A1 and A3 were also calculated. Data were analyzed using repeated-measures analysis of variance (α = 0.05).</p><p><strong>Results: </strong>The results showed that color discrepancies were lowest near the interface and when the outer composite was whiter (A1). Additionally, Charisma Diamond One exhibited better color adjustment ability than Vittra APS Unique.</p><p><strong>Conclusions: </strong>Color discrepancies between the investigated single-shade composites diminished towards the interface with the surrounding composite, particularly when the latter exhibited a lighter shade.</p>","PeriodicalId":21102,"journal":{"name":"Restorative Dentistry & Endodontics","volume":"49 1","pages":"e7"},"PeriodicalIF":0.0,"publicationDate":"2024-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10912548/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140050188","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}
Zhai Wei See, Ming Sern Lee, Abhishek Parolia, Shalini Kanagasingam, Shilpa Gunjal, Shanon Patel
{"title":"Effect of Dental Practicality Index training using an online video on decision-making and confidence level in treatment planning by dental undergraduates.","authors":"Zhai Wei See, Ming Sern Lee, Abhishek Parolia, Shalini Kanagasingam, Shilpa Gunjal, Shanon Patel","doi":"10.5395/rde.2024.49.e8","DOIUrl":"10.5395/rde.2024.49.e8","url":null,"abstract":"<p><strong>Objectives: </strong>The purpose of this study was to evaluate the effect of Dental Practicality Index (DPI) training using an online video on the treatment planning decisions and confidence level of dental undergraduates (DUs).</p><p><strong>Materials and methods: </strong>Ninety-four DUs were shown 15 clinical case scenarios and asked to decide on treatment plans based on 4 treatment options. The most appropriate treatment plan had been decided by a consensus panel of experienced dentists. DUs then underwent DPI training using an online video. In a post-DPI-training test, DUs were shown the same clinical case scenarios and asked to assign the best treatment option. After 6 weeks, DUs were retested to assess their knowledge retention. In all 3 tests, DUs completed the confidence level scale questionnaire. Data were analyzed using the related-samples Wilcoxon signed rank test and the independent-samples Mann-Whitney <i>U</i> test with the level of significance set at <i>p</i> < 0.05.</p><p><strong>Results: </strong>DPI training significantly improved the mean scores of the DUs from 7.53 in the pre-DPI-training test to 9.01 in the post-DPI-training test (<i>p</i> < 0.001). After 6 weeks, the mean scores decreased marginally to 8.87 in the retention test (<i>p</i> = 0.563). DPI training increased their confidence level from 5.68 pre-DPI training to 7.09 post-DPI training.</p><p><strong>Conclusions: </strong>Training DUs using DPI with an online video improved their decision-making and confidence level in treatment planning.</p>","PeriodicalId":21102,"journal":{"name":"Restorative Dentistry & Endodontics","volume":"49 1","pages":"e8"},"PeriodicalIF":0.0,"publicationDate":"2024-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10912547/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140050190","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}
Hoda Saleh Ismail, Brian Ray Morrow, Ashraf Ibrahim Ali, Rabab Elsayed Elaraby Mehesen, Salah Hasab Mahmoud, Franklin Garcia-Godoy
{"title":"Effect of different storage media on elemental analysis and microhardness of cervical cavity margins restored with a bioactive material.","authors":"Hoda Saleh Ismail, Brian Ray Morrow, Ashraf Ibrahim Ali, Rabab Elsayed Elaraby Mehesen, Salah Hasab Mahmoud, Franklin Garcia-Godoy","doi":"10.5395/rde.2024.49.e6","DOIUrl":"10.5395/rde.2024.49.e6","url":null,"abstract":"<p><strong>Objectives: </strong>This study aimed to investigate the elemental analysis and microhardness of a bioactive material (Activa) and marginal tooth structure after storage in different media.</p><p><strong>Materials and methods: </strong>Fifteen teeth received cervical restorations with occlusal enamel and gingival dentin margins using the tested material bonded with a universal adhesive, 5 of them on the 4 axial surfaces and the other 10 on only the 2 proximal surfaces. The first 5 teeth were sectioned into 4 restorations each, then stored in 4 different media; deionized water, Dulbecco's phosphate buffered saline (DPBS), Tris buffer, and saliva. The storage period for deionized water was 24 hours while it was 3 months for the other media. Each part was analyzed by scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS) analysis for different substrates/distances and the wt% of calcium, phosphorus, silica, and fluoride were calculated. The other 10 teeth were sectioned across the restoration, stored in either Tris buffer or saliva for 24 hours or 3 months, and were evaluated for microhardness of different substrates/areas. Data were analyzed using analysis of variance and Tukey's <i>post hoc</i> test.</p><p><strong>Results: </strong>Enamel and dentin interfaces in the DPBS group exhibited a significant increase in calcium and phosphorus wt%. Both silica and fluoride significantly increased in tooth structure up to a distance of 75 μm in the 3-month-media groups than the immediate group. Storage media did not affect the microhardness values.</p><p><strong>Conclusions: </strong>SEM-EDS analysis suggests an ion movement between Activa and tooth structure through a universal adhesive while stored in DPBS.</p>","PeriodicalId":21102,"journal":{"name":"Restorative Dentistry & Endodontics","volume":"49 1","pages":"e6"},"PeriodicalIF":0.0,"publicationDate":"2024-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10912542/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140050191","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}
Ahmad Al Malak, Yasmina El Masri, Mira Al Ziab, Nancy Zrara, Tarek Baroud, Pascale Salameh
{"title":"The status of clinical trials regarding root canal sealers.","authors":"Ahmad Al Malak, Yasmina El Masri, Mira Al Ziab, Nancy Zrara, Tarek Baroud, Pascale Salameh","doi":"10.5395/rde.2024.49.e5","DOIUrl":"10.5395/rde.2024.49.e5","url":null,"abstract":"<p><strong>Objectives: </strong>This study aimed to present the results and analyses of clinical trials, including updates on the different functions of root canal sealers.</p><p><strong>Materials and methods: </strong>In June 2023, we performed a comprehensive search of ClinicalTrials.gov to identify interventional clinical trials pertaining to root canal sealers. In total, 23 clinical trials conducted up to June 2023 were included in this study.</p><p><strong>Results: </strong>Approximately half of the trials (11 out of 23) were completed, while none were terminated or withdrawn. Each included trial had a minimum of 10 participants, with 11 trials having more than 100 participants. None of the assessed trials provided outcomes, and the majority (17 out of 23) lacked associated publications. In terms of geographic distribution, the USA and Canada did not contribute to any root canal sealer trials.</p><p><strong>Conclusions: </strong>This study highlights the lack of diversity in trial locations, the absence of reported results, and a scarcity of clinical trials examining the physicochemical properties of different sealers. Most published trials primarily focused on assessing the post-operative pain effect of these sealers, but no significant difference was found regarding post-operative pain control.</p>","PeriodicalId":21102,"journal":{"name":"Restorative Dentistry & Endodontics","volume":"49 1","pages":"e5"},"PeriodicalIF":0.0,"publicationDate":"2024-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10912543/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140050196","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 salivary microbial load and lactic acid presence in diabetic and non-diabetic individuals with different dental caries stages.","authors":"Monika Mohanty, Shashirekha Govind, Shakti Rath","doi":"10.5395/rde.2024.49.e4","DOIUrl":"10.5395/rde.2024.49.e4","url":null,"abstract":"<p><strong>Objectives: </strong>This study aims to correlate caries-causing microorganism load, lactic acid estimation, and blood groups to high caries risk in diabetic and non-diabetic individuals and low caries risk in healthy individuals.</p><p><strong>Materials and methods: </strong>This study includes 30 participants divided into 3 groups: Group A, High-risk caries diabetic individuals; Group B, High-risk caries non-diabetic individuals; and Group C, Low-risk caries individuals. The medical condition, oral hygiene, and caries risk assessment (American Dental Association classification and International Caries Detection and Assessment System scoring) were documented. Each individual's 3 mL of saliva was analyzed for microbial load and lactic acid as follows: Part I: 2 mL for microbial quantity estimation using nutrient agar and blood agar medium, biochemical investigation, and carbohydrate fermentation tests; Part II: 0.5 mL for lactic acid estimation using spectrophotometric analysis. Among the selected individuals, blood group correlation was assessed. The χ<sup>2</sup> test, Kruskal-Wallis test, and <i>post hoc</i> analysis were done using Dunn's test (<i>p</i> < 0.05).</p><p><strong>Results: </strong>Group A had the highest microbial load and lactic acid concentration, followed by Groups B and C. The predominant bacteria were <i>Lactobacilli</i> (63.00 ± 15.49) and <i>Streptococcus mutans</i> (76.00 ± 13.90) in saliva. Blood Group B is prevalent in diabetic and non-diabetic high-risk caries patients but statistically insignificant.</p><p><strong>Conclusions: </strong>Diabetic individuals are more susceptible to dental caries due to high microbial loads and increased lactic acid production. These factors also lower the executing tendency of neutrophils, which accelerates microbial accumulation and increases the risk of caries in diabetic individuals.</p>","PeriodicalId":21102,"journal":{"name":"Restorative Dentistry & Endodontics","volume":"49 1","pages":"e4"},"PeriodicalIF":0.0,"publicationDate":"2024-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10912541/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140050194","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}
Mohamad Adam Bujang, Evi Diana Omar, Diana Hui Ping Foo, Yoon Khee Hon
{"title":"Sample size determination for conducting a pilot study to assess reliability of a questionnaire.","authors":"Mohamad Adam Bujang, Evi Diana Omar, Diana Hui Ping Foo, Yoon Khee Hon","doi":"10.5395/rde.2024.49.e3","DOIUrl":"10.5395/rde.2024.49.e3","url":null,"abstract":"<p><p>This article is a narrative review that discusses the recommended sample size requirements to design a pilot study to assess the reliability of a questionnaire. A list of various sample size tables that are based on the kappa agreement test, intra-class correlation test and Cronbach's alpha test has been compiled together. For all calculations, type I error (alpha) was set at a maximum value of 0.05, and power was set at a minimum value of 80.0%. For the kappa agreement test, intra-class correlation test, and Cronbach's alpha test, the recommended minimum sample size requirement based on the ideal effect sizes shall be at least 15, 22, and 24 subjects respectively. By making allowances for a non-response rate of 20.0%, a minimum sample size of 30 respondents will be sufficient to assess the reliability of the questionnaire. The clear guideline of minimum sample size requirement for the pilot study to assess the reliability of a questionnaire is discussed and this will ease researchers in preparation for the pilot study. This study provides justification for a minimum requirement of a sample size of 30 respondents specifically to test the reliability of a questionnaire.</p>","PeriodicalId":21102,"journal":{"name":"Restorative Dentistry & Endodontics","volume":"49 1","pages":"e3"},"PeriodicalIF":0.0,"publicationDate":"2024-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10912549/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140050195","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":"Predictor factors of 1-rooted mandibular second molars on complicated root and canal anatomies of other mandibular teeth.","authors":"Hakan Aydın, Hatice Harorlı","doi":"10.5395/rde.2024.49.e2","DOIUrl":"10.5395/rde.2024.49.e2","url":null,"abstract":"<p><strong>Objectives: </strong>This study aimed to determine the effects of 1-rooted mandibular second molar (MnSM) teeth on root canal anatomy complexities of the mandibular central incisor (MnCI), mandibular lateral incisor (MnLI), mandibular canine (MnCn), mandibular first premolar (MnFP), mandibular second premolar (MnSP), and mandibular first molar (MnFM) teeth.</p><p><strong>Materials and methods: </strong>Cone-beam computed tomography images of 600 patients with full lower dentition were examined. Individuals with 1-rooted MnSMs were determined, and the complexity of root canal anatomy of other teeth was compared with individuals without 1-rooted MnSMs (Group-1; subjects with at least one 1-rooted MnSM, Group-2; subjects with more than a single root in both MnSMs). A second canal in MnCIs, MnLIs, MnCns, MnFPs, and MnSPs indicated a complicated root canal. The presence of a third root in MnFMs was recorded as complicated.</p><p><strong>Results: </strong>The prevalence of 1-rooted MnSMs was 12.2%, with the C-shaped root type being the most prevalent (9%). There were fewer complicated root canals in MnCIs (<i>p</i> = 0.02), MnLIs (<i>p</i> < 0.001), and MnFPs (<i>p</i> < 0.001) in Group 1. The other teeth showed no difference between the groups (<i>p</i> > 0.05). According to logistic regression analysis, 1-rooted right MnSMs had a negative effect on having complex canal systems of MnLIs and MnFPs. Left MnSMs were explanatory variables on left MnLIs and both MnFPs.</p><p><strong>Conclusions: </strong>In individuals with single-rooted MnSMs, a less complicated root canal system was observed in all teeth except the MnFMs.</p>","PeriodicalId":21102,"journal":{"name":"Restorative Dentistry & Endodontics","volume":"49 1","pages":"e2"},"PeriodicalIF":0.0,"publicationDate":"2024-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10912550/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140050193","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}
Néstor Ríos-Osorio, Sara Quijano-Guauque, Sandra Briñez-Rodríguez, Gustavo Velasco-Flechas, Antonieta Muñoz-Solís, Carlos Chávez, Rafael Fernandez-Grisales
{"title":"Cone-beam computed tomography in endodontics: from the specific technical considerations of acquisition parameters and interpretation to advanced clinical applications.","authors":"Néstor Ríos-Osorio, Sara Quijano-Guauque, Sandra Briñez-Rodríguez, Gustavo Velasco-Flechas, Antonieta Muñoz-Solís, Carlos Chávez, Rafael Fernandez-Grisales","doi":"10.5395/rde.2024.49.e1","DOIUrl":"10.5395/rde.2024.49.e1","url":null,"abstract":"<p><p>The implementation of imaging methods that enable sensitive and specific observation of anatomical structures has been a constant in the evolution of endodontic therapy. Cone-beam computed tomography (CBCT) enables 3-dimensional (3D) spatial anatomical navigation in the 3 volumetric planes (sagittal, coronal and axial) which translates into great accuracy for the identification of endodontic pathologies/conditions. CBCT interpretation consists of 2 main components: (i) the generation of specific tasks of the image and (ii) the subsequent interpretation report. A systematic and reproducible method to review CBCT scans can improve the accuracy of the interpretation process, translating into greater precision in terms of diagnosis and planning of endodontic clinical procedures. MEDLINE (PubMed), Web of Science, Google Scholar, Embase and Scopus were searched from inception to March 2023. This narrative review addresses the theoretical concepts, elements of interpretation and applications of the CBCT scan in endodontics. In addition, the contents and rationale for reporting 3D endodontic imaging are discussed.</p>","PeriodicalId":21102,"journal":{"name":"Restorative Dentistry & Endodontics","volume":"49 1","pages":"e1"},"PeriodicalIF":0.0,"publicationDate":"2023-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10912545/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140050189","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":"A scientometric, bibliometric, and thematic map analysis of hydraulic calcium silicate root canal sealers.","authors":"Anastasios Katakidis, Konstantinos Kodonas, Anastasia Fardi, Christos Gogos","doi":"10.5395/rde.2023.48.e41","DOIUrl":"10.5395/rde.2023.48.e41","url":null,"abstract":"<p><strong>Objectives: </strong>This scientometric and bibliometric analysis explored scientific publications related to hydraulic calcium silicate-based (HCSB) sealers used in endodontology, aiming to describe basic bibliometric indicators and analyze current research trends.</p><p><strong>Materials and methods: </strong>A comprehensive search was conducted in Web of Science and Scopus using specific HCSB sealer and general endodontic-related terms. Basic research parameters were collected, including publication year, authorship, countries, institutions, journals, level of evidence, study design and topic of interest, title terms, author keywords, citation counts, and density.</p><p><strong>Results: </strong>In total, 498 articles published in 136 journals were retrieved for the period 2008-2023. Brazil was the leading country, and the universities of Bologna in Italy and Sao Paolo in Brazil were represented equally as leading institutions. The most frequently occurring keywords were \"calcium silicate,\" \"root canal sealer MTA-Fillapex,\" and \"biocompatibility,\" while title terms such as \"calcium,\" \"sealers,\" \"root,\" \"canal,\" \"silicate based,\" and \"endodontic\" occurred most often. According to the thematic map analysis, \"solubility\" appeared as a basic theme of concentrated research interest, and \"single-cone technique\" was identified as an emerging, inadequately developed theme. The co-occurrence analysis revealed 4 major clusters centered on sealers' biological and physicochemical properties, obturation techniques, retreatability, and adhesion.</p><p><strong>Conclusions: </strong>This analysis presents bibliographic features and outlines changing trends in HCSB sealer research. The research output is dominated by basic science articles scrutinizing the biological and specific physicochemical properties of commonly used HCSB sealers. Future research needs to be guided by studies with a high level of evidence that utilize innovative, sophisticated technologies.</p>","PeriodicalId":21102,"journal":{"name":"Restorative Dentistry & Endodontics","volume":"48 4","pages":"e41"},"PeriodicalIF":0.0,"publicationDate":"2023-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10695731/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138488390","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}
Rodrigo Stadler Alessi, Renata Terumi Jitumori, Bruna Fortes Bittencourt, Giovana Mongruel Gomes, João Carlos Gomes
{"title":"Effect of irrigation protocols on smear layer removal, bond strength and nanoleakage of fiber posts using a self-adhesive resin cement.","authors":"Rodrigo Stadler Alessi, Renata Terumi Jitumori, Bruna Fortes Bittencourt, Giovana Mongruel Gomes, João Carlos Gomes","doi":"10.5395/rde.2023.48.e28","DOIUrl":"https://doi.org/10.5395/rde.2023.48.e28","url":null,"abstract":"<p><strong>Objectives: </strong>This study aimed to investigate the effect of the application method of 2% chlorhexidine (CHX) and its influence on the adhesion of fiberglass posts cemented with a self-adhesive resin cement.</p><p><strong>Materials and methods: </strong>Sixty human mandibular premolars were endodontically treated and divided into 5 groups (<i>n</i> = 12), according to the canal irrigant and its application method: 2 groups with conventional syringe irrigation (CSI)-2.5% sodium hypochlorite (NaOCl) (control) and 2% CHX- and 3 groups with 2% CHX irrigation/activation-by passive ultrasonic irrigation (PUI), Easy Clean file, and XP-Endo Finisher file. Two roots per group were evaluated for smear layer (SL) removal by scanning electron microscopy. For other roots, fiber posts were luted using a self-adhesive resin cement. The roots were sectioned into 6 slices for push-out bond strength (BS) (7/group) and nanoleakage (NL) (3/group). Data from SL removal were submitted to Kruskal-Wallis and Student-Newman-Keuls tests (α = 0.05). Data from BS and NL were evaluated by 2-way analysis of variance and Tukey's test (α = 0.05).</p><p><strong>Results: </strong>For SL removal and BS, the CHX irrigation/activation promoted better values than CSI with CHX (<i>p</i> < 0.05), but it was not significantly different from CSI with NaOCl (<i>p</i> > 0.05). For NL, the lowest values were obtained by the chlorhexidine irrigation/activation groups (<i>p</i> < 0.05).</p><p><strong>Conclusions: </strong>Active 2% CHX irrigation can be used to improve the post space cleaning and adhesion before fiber post cementation with self-adhesive resin cements.</p>","PeriodicalId":21102,"journal":{"name":"Restorative Dentistry & Endodontics","volume":"48 3","pages":"e28"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/35/0c/rde-48-e28.PMC10477426.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10171655","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}