International Journal of Dentistry最新文献

{"title":"Assessing the Impact of Nano-Graphene Oxide Addition on Surface Microhardness and Roughness of Glass Ionomer Cements: A Laboratory Study.","authors":"Farahnaz Sharafeddin, Mohammad Mahdi Shirani, Zahra Jowkar","doi":"10.1155/2024/5597367","DOIUrl":"10.1155/2024/5597367","url":null,"abstract":"<p><strong>Background: </strong>Nanomaterials, including nano-graphene oxide (nGO), have emerged as promising modifiers for dental materials. Therefore, this study investigated the effect of incorporating nGO into conventional glass ionomer cement (CGIC) and resin-modified glass ionomer cement (RMGIC) on surface roughness and hardness.</p><p><strong>Methods: </strong>Sixty disk-shaped specimens (2 × 6 mm) were divided into six groups: CGIC, RMGIC, CGIC with 1 wt.% nGO, CGIC with 2 wt.% nGO, RMGIC with 1 wt.% nGO, and RMGIC with 2 wt.% nGO. Surface roughness (Ra) and Vickers microhardness (VHN) were measured using a surface profilometer and Vickers microhardness tester, respectively. Statistical analysis employed the Kruskal-Wallis and Mann-Whitney tests (<i>p</i> <0.05).</p><p><strong>Results: </strong>The microhardness of RMGICs significantly increased with 1% and 2% nGO (<i>p</i>=0.017, <i>P</i>=0.001, respectively), while CGICs showed a significant decrease in VHN with nGO incorporation (<i>p</i>=0.001). VHN values of all CGIC groups were significantly higher than those of all RMGIC groups (<i>p</i>=0.001). Mean surface roughness values for all CGICs were significantly higher than those of RMGIC groups (<i>p</i>=0.001). Within the RMGIC groups, mean Ra values of RMGIC + 1 wt.% nGO and RMGIC + 2 wt.% nGO groups decreased significantly compared to the RMGIC control group (<i>p</i>=0.001, <i>p</i>=0.001, respectively). Among CGIC groups, mean Ra values of 1 wt.% and 2 wt.% nGO/CGIC groups were significantly higher than the CGIC control group (<i>p</i>=0.016, <i>p</i>=0.001).</p><p><strong>Conclusion: </strong>Incorporating nGO into RMGICs increased surface microhardness while reducing surface roughness, offering potential advantages for clinical applications. Conversely, adding nGO to CGICs increased surface roughness and decreased surface hardness. These findings emphasize the potential benefits of utilizing nGO in RMGICs and their implications in clinical practice.</p>","PeriodicalId":13947,"journal":{"name":"International Journal of Dentistry","volume":"2024 ","pages":"5597367"},"PeriodicalIF":1.9,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11221947/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141497989","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":"Evaluation of Solubility, and Volumetric and Morphological Alterations of Bioceramic Filling Material for Primary Teeth: A New Methodological Approach.","authors":"Víctor M Ochoa-Rodríguez, Hernán Coaguila-Llerena, Leandro Fernandes, Ana B B Solcia, Juliane M Guerreiro-Tanomaru, Mário Tanomaru-Filho, Gisele Faria","doi":"10.1155/2024/5945033","DOIUrl":"10.1155/2024/5945033","url":null,"abstract":"<p><strong>Objective: </strong>To evaluate the solubility and the volumetric and morphological alterations of bioceramic filling material (Bio-CP) for primary teeth.</p><p><strong>Materials and methods: </strong>Bio-CP, Calen thickened with zinc oxide (Calen-ZO), and with zinc oxide eugenol (ZOE) were placed in 1- or 2-mm-diameter polyethylene tubes and immersed in water or phosphate-buffered saline (PBS) for 30 days. The solubility (mass loss) was assessed using methodology modified from ISO 6876. Filling capacity, volumetric changes, and presence of voids were assessed by microcomputed tomography (micro-CT). The surface distribution of the chemical elements and the crystalline phases was evaluated by energy scattering X-ray scanning electron microscopy (SEM-EDX) and X-ray diffraction (XRD) to detect hydroxyapatite precipitate and components. The Shapiro-Wilk, Kruskal-Wallis, and Dunn's or two-way ANOVA and Tukey post hoc test were used (<i>α</i> = 0.05).</p><p><strong>Results: </strong>The solubility was ZOE > Calen-ZO = Bio-CP. Calen-ZO and Bio-CP were more soluble in water than in PBS. All the materials showed greater solubility in 2-mm tube diameter in both PBS and distilled water, except for Bio-CP in distilled water, which showed no difference between both tube diameters (1 and 2 mm). Only Calen-ZO and ZOE were analyzed by micro-CT, because Bio-CP separated into two phases during scanning. Calen-ZO had greater volumetric loss and presence of voids than ZOE in water, but there was no difference in PBS. The hydroxyapatite precipitate on the surface of Bio-CP and Calen-ZO was detected after immersion in PBS.</p><p><strong>Conclusion: </strong>Although Bio-CP had acceptable solubility and filling capacity, its composition did not allow a proper volumetric and void assessment. From a clinical perspective, Bio-CP has the potential to become a suitable material for root canal filling in primary teeth. Nonetheless, its composition must first be revised to achieve better chemical stability prior to its recommendation.</p>","PeriodicalId":13947,"journal":{"name":"International Journal of Dentistry","volume":"2024 ","pages":"5945033"},"PeriodicalIF":1.9,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11217577/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141491850","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":"Adults with Treacher Collins Syndrome Share Comparable 3D Upper Airway Dimensions with Nonsyndromic Individuals.","authors":"Renan Jhordan Mettelziefen Dos Inocentes, Alexandre de Almeida Ribeiro, Maria Noel Marzano-Rodrigues, Marília Sayako Yatabe-Ioshida, Ivy Kiemle Trindade-Suedam","doi":"10.1155/2024/6545790","DOIUrl":"10.1155/2024/6545790","url":null,"abstract":"<p><strong>Purpose: </strong>Sleep apnea symptoms, such as snoring and daytime somnolence, are commonly observed in individuals with Treacher Collins Syndrome (TCS) and may be related to airway obstruction due to micro- and retro-gnathia. This study aims to three-dimensionally evaluate the upper airway using cone-beam computed tomography (CBCT) exams of adolescents (TCS-ADOL) and adults (TCS-ADUL) with TCS compared to a nonsyndromic group (CON).</p><p><strong>Materials and methods: </strong>Twenty-six CBCT exams were divided into three groups: TCS-ADOL (<i>n</i> = 7) (13.14 ± 1.67 years): CBCT exams of TCS adolescents; TCS-ADUL (<i>n</i> = 10) (21.80 ± 4.39 years): CBCT exams of TCS adults; and CON (<i>n</i> = 9) (25.33 ± 8.57 years): CBCT exams of adult nonsyndromic individuals with Class II skeletal pattern. The variables analyzed were (1) total upper airway volume; (2) nasal cavity volume; (3) total pharyngeal volume; (4) nasopharyngeal volume; (5) oropharyngeal volume; (6) pharyngeal minimal cross-sectional area; (7) pharyngeal length; and (8) pharyngeal depth. Scans were analyzed by two examiners, and intra- and inter-rater agreement was calculated. A <i>p</i>-value of ≤0.05 was considered significant.</p><p><strong>Results: </strong>Although not statistically significant, the TCS-ADUL group showed decreased airway volume and minimal cross-sectional areas compared to the CON group. There were also significant differences between TCS-ADOL and TCS-ADUL, with significantly lower airway volumes in the TCS-ADOL group. Strong positive correlations were found between certain airway measurements in the TCS-ADOL group, which were not observed in adults.</p><p><strong>Conclusions: </strong>The upper airways of adults with TCS are dimensionally similar to those of nonsyndromic individuals, despite absolute value reductions found in the syndromic group. The reduced airway in the adolescent population suggests significant potential for growth, mainly in pharyngeal dimensions.</p>","PeriodicalId":13947,"journal":{"name":"International Journal of Dentistry","volume":"2024 ","pages":"6545790"},"PeriodicalIF":1.9,"publicationDate":"2024-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11221962/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141497988","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":"Cardiovascular and Vector-Cardiographic Effects of Articaine Anesthesia with Epinephrine.","authors":"Christoph Pökel, Antina Schulze, Martin Busse","doi":"10.1155/2024/8610423","DOIUrl":"10.1155/2024/8610423","url":null,"abstract":"<p><p>The aim was to investigate the vector-cardiographic effects in patients submitted to dental extraction under local anesthesia. Twenty-one patients aged 36.6 ± 12.4 years with a clinical and radiographic indication of mandibular or maxillary tooth extraction were enrolled. The intervention was a local or mandibular nerve block anesthesia with 4% articaine hydrochloride containing epinephrine (1 : 100,000; 40 mg/ml + 10 <i>μ</i>g/ml). Blood pressure (BP), heart rate (HR), pulse wave transit time, and vector-cardiography data were recorded throughout 3 min before and 5 min after injection. <i>QRS</i>- and <i>T</i>-wave area under the curve (<i>QRS</i> _AUC/<i>T</i> _AUC) were calculated from the <i>X</i>/<i>Y</i>/<i>Z QRS</i>-vector or <i>T</i>-vector. <i>T</i>-wave amplitude (<i>T</i> _AM), <i>T</i> _AUC values, and diastolic BP decreased, and HR significantly increased 4 min after injection. A transient moderate HR drop and a corresponding small increase in <i>T</i> _AM and <i>T</i> _AUC immediately after the injection procedure may be explained by a decreased sympathetic tone due to psychological relief. In dental anesthesia, the systemic epinephrine effects are represented by a decrease in <i>T</i> _AUC. These effects are most pronounced in the <i>X</i>- and <i>Y</i>-leads. The 3D determination of vector planes or amplitudes is a simple method to register the sympathetic tone in local anesthesia independently of possible effects on <i>T</i>-wave characteristics in single leads. In conclusion, <i>T</i>-wave determination may help to detect even small increases in systemic adrenaline concentration in case of accidental intravascular injection. At the same time, full rhythm and spatial ischemia control is provided.</p>","PeriodicalId":13947,"journal":{"name":"International Journal of Dentistry","volume":"2024 ","pages":"8610423"},"PeriodicalIF":1.9,"publicationDate":"2024-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11221961/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141497990","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":"The Relationship between High-Intensity Physical Activity and Traumatic Dental Injury among Young Adults in South Korea.","authors":"Ji-Young Son, Dong-Hun Han","doi":"10.1155/2024/9678841","DOIUrl":"10.1155/2024/9678841","url":null,"abstract":"<p><strong>Materials and methods: </strong>This study analyzed data collected from the 5th National Health and Nutrition Examination Survey (KNHANES V:2010-2012). The total number of participants in the 5th KNAHANES was 5,383 young adults aged 19-39 years, selected from 25,534 participants. Logistic regression analysis was performed using socioeconomic status (sex, age, education level, and income), physical activity intensity (vigorous and moderate), frequency of vigorous and moderate physical activity (days per week), and traumatic dental injuries due to exercise.</p><p><strong>Results: </strong>A total of 5,383 participants were included in the analysis. High-intensity exercisers had a statistically different association with traumatic dental injuries due to exercise. In all models, high-intensity exercisers had more traumatic dental injuries than moderate-intensity exercisers, and participants who exercised vigorously 4 or more days per week had a significantly higher prevalence experience of traumatic dental injuries. Among adults in their 20s, men, college attendees, and those with higher incomes, the prevalence of exercising vigorously 4 or more days per week was higher.</p><p><strong>Conclusions: </strong>Among young adults, a higher frequency of high-intensity physical activity was associated with a higher prevalence experience of traumatic tooth injury due to exercise compared with no physical activity.</p>","PeriodicalId":13947,"journal":{"name":"International Journal of Dentistry","volume":"2024 ","pages":"9678841"},"PeriodicalIF":1.9,"publicationDate":"2024-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11221969/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141497993","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":"Critical Evaluation of Global Infection Prevention and Control Guidelines for Dentistry Published during the First 2 Years of the COVID-19 Pandemic.","authors":"Khlood Alkurdi, Rowaina Mansouri, Aseel Ismail, Noha Seoudi","doi":"10.1155/2024/6611105","DOIUrl":"10.1155/2024/6611105","url":null,"abstract":"<p><strong>Objectives: </strong>The outbreak of the coronavirus disease (COVID-19) encouraged immediate actions by governments and healthcare associations across the world to flatten the curve and prevent health systems from being overburdened. As dentistry comprises aerosol-generating procedures (AGPs), which could increase the risk of infection, various guidelines were issued for dental services which focused on infection prevention and control (IPC) measures for COVID-19. This systematic review focuses on dental IPC guidelines, with the aim of comparing these guidelines against a gold standard.</p><p><strong>Method: </strong>The Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) 2020 checklist was employed. Predefined inclusion and exclusion criteria were constructed. Information sources comprised Google Scholar, PubMed, and a manual search from December 2019 to December 2021. The Appraisal of Guidelines for Research and Evaluation (AGREE II) instrument was used. Consensus scoring was applied for all guidelines.</p><p><strong>Results: </strong>A total 61 guidelines were included in the review. The UK national guideline was used as a gold standard as it ranked the highest AGREE score (75 out of 84) and thus was established for comparison with each of the included guidelines. Overall, 40% of the included guidelines had a high consensus score in relation to the UK national guideline.</p><p><strong>Conclusion: </strong>This systematic review highlighted the variability in content and quality of advice given by different organizations in response to the COVID-19 pandemic in their efforts to reduce SARS-CoV-2 transmission in dentistry. Establishing a single worldwide fast-acting dental organization would ensure that high-quality standardized guidance is available, to enhance health equality and worldwide dental clinical standards.</p>","PeriodicalId":13947,"journal":{"name":"International Journal of Dentistry","volume":"2024 ","pages":"6611105"},"PeriodicalIF":1.9,"publicationDate":"2024-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11221955/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141497991","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 Dentin Thickness in Mandibular First Molar: An In Vivo Cone-Beam Computed Tomographic Study.","authors":"Sahil Choudhari, Kavalipurapu Venkata Teja, Sindhu Ramesh, Jerry Jose, Mariangela Cernera, Parisa Soltani, Emmanuel João Nogueira Leal da Silva, Gianrico Spagnuolo","doi":"10.1155/2024/8823070","DOIUrl":"10.1155/2024/8823070","url":null,"abstract":"<p><strong>Aim: </strong>To determine the minimum dentin thickness in the mesial and distal walls of the mesiobuccal (MB) and mesiolingual (ML) canals of the mandibular first molars using cone-beam computed tomography (CBCT).</p><p><strong>Materials and methods: </strong>CBCT examinations of 624 mandibular first molars from an Indian subpopulation were analyzed. The mesial and distal minimum dentin thickness was evaluated in 1 mm intervals apical to the furcation area. Independent <i>t</i>-test was used to analyze the data (<i>α</i> = 0.05). Using Cohen's kappa coefficient, the interexaminer and intraexaminer reliability was evaluated.</p><p><strong>Results: </strong>The mesial dentin thickness was significantly higher than the distal dentin thickness for MB and ML canals (<i>P</i>=0.01). The average dentin thickness in the distal and mesial plane of the MB canal was 1.15 ± 0.15 mm and 1.52 ± 0.19 mm at the 1 mm level and 0.83 ± 0.13 and 1.08 ± 0.18 at the 5 mm level, respectively. For the ML canal, the average dentin thickness in the distal plane and the mesial plane was 1.24 ± 0.18 mm and 1.44 ± 0.21 at the 1 mm level and 0.91 ± 0.16 and 1.01 ± 0.17 at the 5 mm level, respectively. Statistical analysis between the MB and ML canals showed significant differences in the dentin thickness at 4 and 5 mm levels in both the distal and the mesial planes (<i>P</i>=0.01). In more than 85% of the cases, the minimum dentin thickness was seen at the 5 mm level in both the distal and mesial planes in MB and ML canals.</p><p><strong>Conclusion: </strong>The distal planes of the mesiolingual and mesiobuccal canals were thinner in most cases, making the distal surface more prone to iatrogenic perforations. Considerably, at 4 and 5 mm from the furcation, the distal wall was significantly thinner than the mesial walls. Understanding the anatomy of the danger zone in the mesial roots of the mandibular first molars may serve to minimize the risk of endodontic mishaps such as strip perforations.</p>","PeriodicalId":13947,"journal":{"name":"International Journal of Dentistry","volume":"2024 ","pages":"8823070"},"PeriodicalIF":1.9,"publicationDate":"2024-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11208803/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141467829","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":"Cross-Sectional Survey to Assess Dental Students' Perception of the Utilization of a Case Difficulty Assessment Form during Various Stages of Root Canal Therapy.","authors":"Lubna E Hamadah, Maha M Algofaily, Ali T Alaqla, Naif A Alrubaiq, Ghaida A Aljammaz","doi":"10.1155/2024/1217448","DOIUrl":"10.1155/2024/1217448","url":null,"abstract":"<p><strong>Background: </strong>Several endodontic difficulty assessment forms are available to help dental students and general dentists estimate the difficulty of the case before initiating the endodontic treatment.</p><p><strong>Objectives: </strong>This study aimed to assess if the American Association of Endodontics (AAE) case difficulty assessment form affects the dental student's perception of the difficulty encountered while performing root canal treatment (RCT).</p><p><strong>Materials and methods: </strong>This was a cross-sectional online survey. After obtaining IRB approval, an electronic questionnaire was sent to dental students enrolled in the 4th and 5th years at King Saud University (KSU) and King Saud bin Abdulaziz University for Health Sciences (KSAU-HS), Riyadh, Saudi Arabia. The questionnaire was divided into informed consent, demographic data, the use of the AAE case assessment form, RCT steps, diagnosis, local anesthesia administration, tooth isolation, and endodontic procedure.</p><p><strong>Results: </strong>A total of 195 dental students participated in the study. There were 101 (52%) females, and 139 (71%) were from KSAU-HS. A positive association was found between students who used the AAE assessment form and who did not with their ability to reach the correct diagnosis (<i>p</i>=0.005), tooth isolation (<i>p</i>=0.03), and endodontic procedure difficulty score (<i>p</i>=0.018).</p><p><strong>Conclusion: </strong>The use of the AAE form by dental students enabled them to differentiate between complicated and uncomplicated cases, thus lowering the difficulty encountered during RCT.</p>","PeriodicalId":13947,"journal":{"name":"International Journal of Dentistry","volume":"2024 ","pages":"1217448"},"PeriodicalIF":1.9,"publicationDate":"2024-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11221960/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141497992","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":"Effect of Autoclave Sterilization on the Number of Uses and Resistance to Cyclic Fatigue of WaveOne Gold and Four Replica-Like Endodontic Instruments.","authors":"Gustavo Ragozzini, Amjad Abu Hasna, Fernando Antonio Siano Dos Reis, Felipe Bernardo de Moura, Tiago Moreira Bastos Campos, Carlos Eduardo Silveira Bueno, Cláudio Antonio Talge Carvalho, Alexandre Sigrist de Martin","doi":"10.1155/2024/6628146","DOIUrl":"10.1155/2024/6628146","url":null,"abstract":"<p><p>This study aimed to evaluate the effect of autoclave sterilization on the integrity and instruments' fracture number after multiple uses and cyclic fatigue of the original WaveOne Gold (Dentsply Sirona Endodontics) compared to four replica-like instruments (TF4-Gold, Roll-Wave-Gold, W-File, and Micro-Gold). The instruments were analyzed by scanning electron microscope (SEM) before being used in root canal instrumentation (baseline). One hundred and fifty human molars, freshly extracted for orthodontic reasons or periodontal disease and with severe curvature (between 30° and 60°), were used. Fifty teeth were instrumented with 10 instruments from each group and were evaluated for integrity. After sterilization in an autoclave, the instruments were analyzed by SEM. This procedure was repeated twice more, totaling three rounds of instrumentation, sterilization, and SEM analysis. Ten unused instruments from each group were evaluated for resistance to cyclic fatigue in a static test using a motor and a device simulating a canal with a 60° curvature angle. The instruments were driven by the motor until separation, visually verified, and the time measured in seconds. Data were analyzed by <i>Chi</i>-square, one-way ANOVA, and Tukey analysis, considering a significance level of 5%. It was found that there was no statistically significant difference between the groups tested in the effect of sterilization on the number of uses. The SEM analysis showed distortions in the instruments after the 3rd use. There was a statistically significant difference in the cyclic fatigue test between the results of WaveOne Gold, TF4 Gold, and Roll Wave Gold compared to W File and Micro Gold (<i>P</i>  < 0.0001) and a statistically significant difference between the W File and Micro Gold groups (<i>P</i>  < 0.0001). In conclusion, this study affirmed that WaveOne Gold, TF4-Gold, and Roll-Wave-Gold instruments exhibit comparable cyclic fatigue resistance. Besides, all examined instruments can be reliably employed for up to two cases.</p>","PeriodicalId":13947,"journal":{"name":"International Journal of Dentistry","volume":"2024 ","pages":"6628146"},"PeriodicalIF":1.9,"publicationDate":"2024-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11208808/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141467830","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":"Managing Cracked Teeth with Root Extension: A Prospective Preliminary Study Using Biodentine™ Material.","authors":"Kênia Maria Soares de Toubes, Isabella Sousa Corrêa, Regina Célia Lopes Valadares, Stephanie Quadros Tonelli, Fábio Fernandes Borém Bruzinga, Frank Ferreira Silveira","doi":"10.1155/2024/2234648","DOIUrl":"https://doi.org/10.1155/2024/2234648","url":null,"abstract":"<p><strong>Purpose: </strong>The authors of this study proposed an innovative approach involving the use of Biodentine™ material as an intraorifice barrier in cracked teeth with root extension to promote internal crack sealing, preventing the possibility of microinfiltration and apical crack propagation.</p><p><strong>Materials and methods: </strong>The dental records of 11 patients with 12 posterior cracked teeth with root extension were included with a precise protocol performed by a senior endodontist. The treatment protocol included pulp diagnosis, crack identification using a dental operating microscope (DOM), endodontic treatment, placing a Biodentine™ as an intraorifice barrier, and immediate full-coverage restoration. The effectiveness of the treatment was assessed at two intervals, 6 months, and 1-3 years posttreatment, evaluating clinical, radiographic, and tomographic aspects. The treatment was deemed successful if there were no indications of radiolucency, sinus tracts, edema, or periodontal pockets associated with the crack line.</p><p><strong>Results: </strong>The study observed remarkably positive outcomes during the follow-up period, which spanned from 1 to 3 years. All the cracked teeth (100%) remained asymptomatic, meaning they were free of pain or discomfort. Furthermore, these teeth were in occlusal function. Both radiographic and tomographic assessments revealed the absence of bone loss along the crack line. This outcome signifies that the treatment effectively prevented further deterioration of the surrounding bone.</p><p><strong>Conclusions: </strong>Integrating advanced biomaterials and conservative restorative techniques has paved the way for innovative approaches in dental care. This protocol suggests a proactive step for managing cracked teeth with root extension. It addresses both biological aspects by sealing internal cracks and mechanical aspects by preventing crack progression, thereby improving these teeth' prognosis and long-term survival.</p>","PeriodicalId":13947,"journal":{"name":"International Journal of Dentistry","volume":"2024 ","pages":"2234648"},"PeriodicalIF":2.1,"publicationDate":"2024-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11098601/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140957468","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}