European Journal of Dentistry最新文献

{"title":"The Influence of Streptococcus mutans Biofilm Formation in a Polymicrobial Environment (Streptococcus gordonii & Porphyromonas gingivalis).","authors":"Indah Listiana Kriswandini, Sidarningsih Sidarningsih, Adelheid Chrissanda Hermanto, Pinta Rahayuning Tyas, Mohammed Ahmed Aljunaid","doi":"10.1055/s-0044-1782215","DOIUrl":"10.1055/s-0044-1782215","url":null,"abstract":"<p><strong>Objectives: </strong> Biofilms play a vital role in the occurrence or worsening of an infectious disease. <i>Streptococcus mutans</i> is a bacterium with the ability to form biofilms that plays a key role in the development of infectious diseases such as dental caries. The formation of biofilms in <i>S. mutans</i> is mediated by quorum sensing. Inhibiting quorum sensing can be considered as one of the approaches to prevent caries. This study aims to investigate the ability of <i>Streptococcus gordonii</i> and <i>Porphyromonas gingivalis</i> bacteria to inhibit the formation of <i>S. mutans</i> biofilm.</p><p><strong>Materials and methods: </strong> This research was conducted to analyze bacterial biofilm formation and metabolism. The bacteria used are <i>S. mutans</i> (serotype C), <i>S. gordonii</i> (ATCC 5165), and <i>P. gingivalis</i> (ATCC 33277). Biofilm formation was analyzed using the crystal violet assay. Bacterial metabolism was analyzed using the methylthiazol tetrazolium (MTT) assay.</p><p><strong>Results: </strong> The results of the crystal violet assay indicate a decrease in biofilm formation in <i>S. mutans</i> when in the presence of <i>S. gordonii</i> and <i>S. mutans</i> in the presence of <i>P. gingivalis</i>. The results of the MTT assay show no significant change in the bacterial metabolism of <i>S. mutans</i> in the presence of <i>S. gordonii</i> and <i>S. mutans</i> in the presence of <i>P. gingivalis</i>. However, <i>S. mutans</i> with the presence of <i>S. gordonii</i> and <i>P. gingivalis</i> show an increase in biofilm formation and bacterial metabolism.</p><p><strong>Conclusion: </strong> <i>S. gordonii</i> and <i>P. gingivalis</i> are each capable of inhibiting the formation of <i>S. mutans</i> biofilm in a polymicrobial environment.</p>","PeriodicalId":12028,"journal":{"name":"European Journal of Dentistry","volume":" ","pages":"1085-1089"},"PeriodicalIF":0.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11479741/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140921719","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":"Enhancing Pediatric Dental Care: The Influence of Virtual Reality.","authors":"Sara Faisal Hamdy, Mohamed Sherif Mohamed Salah Farag, Yousra Samir Helmy, Asmaa Ali Abo-Elsoud","doi":"10.1055/s-0044-1782193","DOIUrl":"10.1055/s-0044-1782193","url":null,"abstract":"<p><strong>Objective: </strong> The purpose of this study was to assess the effects of virtual reality (VR) in reducing pain and anxiety levels in children. The study also compared active and passive distraction methods using VR during the delivery of inferior alveolar nerve blocks (IANBs) in dental procedures in children.</p><p><strong>Material and methods: </strong> The study comprised 45 preschool patients, aged between 4 and 6 years, with no prior dental anesthetic experience. The participants were randomly assigned to three groups based on the sort of management style: Group A used the tell-show-do technique, Group B engaged in passive distraction by watching cartoons using a VR headset, and Group C participated in active distraction by playing games using a controller with the VR headset. Pain and anxiety were evaluated using physiological measurements, namely by analyzing the variations in blood pressure, heart rate, and oxygen saturation before and after the administration of IANB. Psychological assessments were conducted using the Wong-Baker faces scale, Modified Dental Anxiety scale questionnaires, and Revised Face, Legs, Activity, Cry and Consolability scale after administering IANB.</p><p><strong>Results: </strong> The physiological outcomes revealed no statistically significant differences in blood pressure and oxygen saturation. However, there was a statistically significant increase in the heart rate in group A compared with groups B and C. In terms of psychological measurements, groups B and C exhibited a significant improvement in pain experience and a decrease in anxiety.</p><p><strong>Conclusion: </strong> This study concluded that VR reduced pain and anxiety levels in its passive and active forms.</p>","PeriodicalId":12028,"journal":{"name":"European Journal of Dentistry","volume":" ","pages":"1030-1039"},"PeriodicalIF":0.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11479731/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140921535","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 Potential Role of Reactive Oxygen Species Produced by Low-Density Neutrophils in Periodontitis.","authors":"Ali Omran Mousa, Ali Hussien Abass Al Hussaini, Hashim Mueen Hussein","doi":"10.1055/s-0044-1782211","DOIUrl":"10.1055/s-0044-1782211","url":null,"abstract":"<p><strong>Objective: </strong> Neutrophils own an arsenal of dischargeable chemicals that enable them to handle bacterial challenges, manipulating innate immune response and actual participation in acquired immunity. The reactive oxygen species (ROS) are one of the most important chemicals that neutrophils discharge to eradicate pathogens. Despite their beneficial role, the ROS were strongly correlated to periodontal tissue destruction. Lowdensity neutrophils (LDN) have been recognized for producing enhanced quantities of ROS. However, the potential role of ROS produced by LDN in periodontitis is unknown. The aim of the study was to investigate the impact of ROS produced by LDN in periodontal diseases.</p><p><strong>Materials and methods: </strong> Venous blood and periodontal parameters were obtained from 100 systemically healthy subjects divided into 40 participants with healthy periodontium in the control group and 60 with unstable periodontitis in the study group. Flow cytometry was used to measure the production of ROS by LDN in both groups.</p><p><strong>Statistical analysis: </strong> The data were analyzed for normal distribution using the Shapiro-Wilk test at <i>p</i> < 0.05, Spearman's correlations, and Mann-Whitney U test. Statistical analysis was performed in SPSS v25.</p><p><strong>Results: </strong> No difference between the groups had been obtained in ROS production by LDN. However, a significant positive correlation existed between ROS and clinical attachment loss in periodontitis.</p><p><strong>Conclusion: </strong> LDN exhibits the same ROS generation capacity in the control and periodontitis groups.</p>","PeriodicalId":12028,"journal":{"name":"European Journal of Dentistry","volume":" ","pages":"1142-1148"},"PeriodicalIF":0.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11479733/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140921769","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 Technique and Material Used to Join Transfers Affect the Accuracy and Final Fit of Implant-Supported Prostheses-In Vitro Study.","authors":"Guilherme de Aguiar Mariotto, Anna Caroliny Detogni, Monica Cavalheiro Persh, Mário Alexandre Coelho Sinhoreti, Veridiana Camilotti, Márcio José Mendonça","doi":"10.1055/s-0044-1779422","DOIUrl":"10.1055/s-0044-1779422","url":null,"abstract":"<p><strong>Objectives: </strong> This study evaluated the linear dimensional change of polymerization of three materials and two techniques of the union of molding transfers for implant-supported prostheses used in the open-tray technique.</p><p><strong>Materials and methods: </strong> A nylon maxilla-shaped matrix was made, two osseous integrated implants were installed, and, over these two, straight conical mini-pillars were installed. Open-tray impression transfers were attached to the mini-pillars, and a silicone guide was made to standardize the connections between the transfers. The samples were divided into six groups (<i>n</i> = 20): PA (Pattern Resin LS, chemically activated acrylic resin in the single step technique); DU (Durallay, chemically activated acrylic resin in the single step technique); BI (Protemp4, bisacrylic resin in the single step technique); PAC (Pattern Resin LS in sectioning and joining of segments technique); DUC (Durallay, in sectioning and joining of segments technique); and BIC (Protemp4, in sectioning and joining of segments technique). The linear dimensional change values that occurred among these transfers were measured in a profile projector (VB300; Starret) coupled to the Quadra Check device, with a resolution of 0.001 mm, performed by a single calibrated operator.</p><p><strong>Statistical analysis: </strong> Data were submitted to a two-way analysis of variance and Tukey's test (<i>p</i> < 0.01).</p><p><strong>Results: </strong> Statistically significant mean values were found in all comparisons. The PA showed the lowest mean values (µm) of linear dimensional change, both in the single-step technique and in the sectioning and joining technique, in the following order: BI 255.73 (3.81), DU 173.75 (2.30), PA 95.97 (3.20), BIC 23.82 (1.71), DUC 20.85 (2.53), and PAC 13.27 (2.09). The single-step technique showed the worst results, regardless of the material.</p><p><strong>Conclusion: </strong> The sectioning and joining technique reduced the dimensional change in all materials, and the Pattern Resin LS showed the lowest shrinkage mean values, followed by Durallay and Protemp4.</p>","PeriodicalId":12028,"journal":{"name":"European Journal of Dentistry","volume":" ","pages":"1040-1047"},"PeriodicalIF":0.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11479725/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141161462","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":"Prediabetes Associates with Matrix Metalloproteinase-8 Activation and Contributes to the Rapid Destruction of Periodontal Tissues.","authors":"Kehinde Adesola Umeizudike, Nur Rahman Ahmad Seno Aji, Katariina Niskanen, Iina Rantala, Dimitra Sakellari, Andreas Grigoriadis, Tommi Pätilä, Shipra Gupta, Timo Sorsa, Ismo T Räisänen","doi":"10.1055/s-0044-1788797","DOIUrl":"https://doi.org/10.1055/s-0044-1788797","url":null,"abstract":"<p><strong>Objective: </strong> The aim of this cross-sectional study was to investigate the relationship between periodontitis, potential periodontitis oral fluid biomarkers, and prediabetes.</p><p><strong>Materials and methods: </strong> This study included 150 Greek adults aged 25 to 78 years who were tested with an Hemoglobin A1C (HBA1c) diagnostic system, an active-matrix metalloproteinase-8 (aMMP-8) point-of-care (PoC) test, and several salivary biomarkers enzyme-linked immunosorbent assay tests and gelatin zymography. A full-mouth clinical examination was performed to assess their periodontal and oral health status.</p><p><strong>Statistical analysis: </strong> The Kruskal-Wallis test was used to determine the statistically significant difference in the levels of periodontal oral fluid biomarkers between the different periodontitis stages, periodontitis grades, and the stages and grades of periodontitis combined. Spearman's rank correlation was performed to assess the strength and direction of the association between aMMP-8 and HbA1c levels (<5.7 and ≥5.7%) and with the other oral fluid biomarkers among patients with severe periodontitis. A two-sided <i>p</i>-value below 0.05 was considered statistically significant in this study.</p><p><strong>Results: </strong> aMMP-8, but not total MMP-8 or other biomarkers, associated significantly with the stage and grade of periodontitis combined (<i>p</i> < 0.001, Kruskal-Wallis test). Among stage III grade C periodontitis patients, aMMP-8 levels were significantly positively correlated with prediabetes (Spearman's rho = 0.646, <i>p</i> = 0.044), total MMP-8 (rho = 0.636, <i>p</i> = 0.048), PMN Elastase (rho = 0.729, <i>p</i> = 0.017), total MMP-9 (rho = 0.721, <i>p</i> = 0.019), and total MMP-8/TIMP-1 molar ratio (rho = 0.879, <i>p</i> < 0.001).</p><p><strong>Conclusion: </strong> Prediabetic disease development can upregulate MMP-8 expression (total MMP-8) in rapidly progressing, severe periodontitis, where MMP-8 latent species are further activated into their active forms (aMMP-8). Simultaneously, several proinflammatory biomarker levels are elevated in this tissue-destructive biomarker cascade. This development is easily detectable online/in real-time within 5 minutes by aMMP-8 PoC testing at the dentist's office.</p>","PeriodicalId":12028,"journal":{"name":"European Journal of Dentistry","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142364881","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparative Analysis of Coronal Sealing Materials in Endodontics: Exploring Non-Eugenol Zinc Oxide-Based versus Glass-Ionomer Cement Systems.","authors":"Mohamed Hashim Alamin, Sara Ayman Yaghi, Abdullah Faris Al-Safi, Wared R Y R Bouresly, Kausar Sadia Fakhruddin, Lakshman Perera Samaranayake, Saaid Al Shehadat","doi":"10.1055/s-0044-1782695","DOIUrl":"10.1055/s-0044-1782695","url":null,"abstract":"<p><p>The proper closure of the access cavity between appointments during endodontic treatment is paramount and relies on temporary fillings. This systematic review evaluates the effectiveness of zinc oxide-based materials and glass-ionomer cement (GIC) as temporary coronal sealers after root canal treatment in extracted human teeth. Three databases were searched to identify randomized clinical trials that examined the sealing properties of various temporary sealing materials using dyes or stains as indicators. A total of seven <i>in vitro</i> studies that fulfilled the eligibility criteria were critically analyzed. These indicated significant variations in the relative sealing ability of the coronal breach of endodontically treated teeth, either by zinc oxide or GIC-based materials. While GIC-based material (e.g., Fuji IX and Fuji II) exhibited superior sealing of single-rooted teeth, zinc oxide-based material (e.g., Cavit, Coltosol, Caviton) also showed promising attributes. Resin-modified GIC formulations displayed enhanced physical properties, yet challenges related to adhesive failure and shrinkage during polymerization were observed. Zinc oxide-based materials have demonstrated superior coronal sealing effectiveness over certain GIC in controlled settings. Their premixed nature ensures consistent application and hygroscopic properties improve cavity sealing. However, the focus on dye penetration tests for microleakage <i>in vitro</i> may not fully represent the risk of bacterial infiltration. Thus, <i>in vivo</i> studies are crucial for validating these findings in clinical contexts.</p>","PeriodicalId":12028,"journal":{"name":"European Journal of Dentistry","volume":" ","pages":"987-996"},"PeriodicalIF":0.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11479736/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141467119","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 Vinyl Acetate, Glass Fibers Contents, and Buffer Space on EVA's Mechanical Property and Shock Absorption Ability.","authors":"Shinji Togo, Takahiro Sakaue, Arata Tsutsui, Yoshiaki Matsuda, Kazunori Nakajima, Tomotaka Takeda, Kenichi Fukuda, Pekka Vallittu, Lippo Lassila","doi":"10.1055/s-0044-1779427","DOIUrl":"10.1055/s-0044-1779427","url":null,"abstract":"<p><strong>Objectives: </strong> The aim of the study was to evaluate the mechanical properties and impact absorption capacity of prototype materials comprising ethylene vinyl acetate (EVA) of different hardness reinforced using different amounts of glass fibers (GFs), considering a buffer space.</p><p><strong>Materials and methods: </strong>Six prototype materials were made by adding E-GFs (5 and 10 wt%) to EVA with vinyl acetate (VA) contents of 9.4 wt% (\"hard\" or HA) and 27.5 wt% (\"soft\" or SO). Durometer hardness and tensile strength tests were performed to evaluate the mechanical properties of the materials. Moreover, an impact test was conducted using a customized pendulum impact tester to assess the impact absorption capacity (with or without a buffer space) of the specimens.</p><p><strong>Results: </strong>The mechanical properties of the prototypes, namely, durometer hardness, Young's modulus, and tensile strength, were significantly higher in the HA group than in the SO group, regardless of the presence or added amount of GFs. The addition of GFs, particularly in a large amount (10 wt%), significantly increased these values. In terms of the impact absorption capacity, the original hardness of the EVA material, that is, its VA content, had a more substantial effect than the presence or absence of GFs and the added amount of GFs. Interestingly, the HA specimens with the buffer space exhibited significantly higher impact absorption capacities than the SO specimens. Meanwhile, the SO specimens without the buffer space exhibited significantly higher impact absorption capacities than the HA specimens. Moreover, regardless of the sample material and impact distance, the buffer space significantly improved impact absorption. In particular, with the buffer space, the impact absorption capacity increased with the added amount of GFs.</p><p><strong>Conclusion: </strong>The basic mechanical properties, including durometer hardness, Young's modulus, and tensile strength, of the EVA prototype were significantly increased by reducing the amount of VA regardless of the presence or added amount of GFs. Adding GFs, particularly in large amounts, significantly increased the values of aforementioned mechanical properties. Impact absorption was significantly affected by the hardness of the original EVA material and enhanced by the addition of the buffer space. The HA specimen had a high shock absorption capacity with the buffer space, and the SO specimen had a high shock absorption capacity without the buffer space. With the buffer space, impact absorption improved with the amount of added GFs.</p>","PeriodicalId":12028,"journal":{"name":"European Journal of Dentistry","volume":" ","pages":"1048-1061"},"PeriodicalIF":0.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11479732/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140921581","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 Role of Dental Arch Dimensions and Impacted Third Molars on Mandibular Anterior Segment Crowding.","authors":"Mimoza Selmani, Manushaqe Selmani Bukleta, Shkelzen B Duci","doi":"10.1055/s-0044-1785186","DOIUrl":"10.1055/s-0044-1785186","url":null,"abstract":"<p><strong>Objectives: </strong> This study aimed to investigate the potential impact of arch dimensions and unerupted third molars on mandibular anterior segment crowding.</p><p><strong>Materials and methods: </strong> This study included a total of 240 subjects with an average age of 18 years seeking orthodontic treatment. Panoramic radiographs, alginate impressions, and study models were taken for measurements. This study utilized the Ganss ratio to calculate the ratio of retromolar space to the width of the crown of the third molar, along with other measurements such as intercanine and intermolar widths, arch perimeter, and arch length to assess dental arch dimensions.</p><p><strong>Results: </strong> We found that the Ganss ratio and angle B values on both the right and left sides were significantly different between the noncrowding and crowding groups, suggesting a potential role for third molars in mandibular anterior segment crowding. Additionally, there was an increase in angle A on both sides in the crowding group, indicating a more acute angle between the anterior teeth. This study also observed a reduction in the retromolar space on the third molars in the crowding group, further supporting the potential role of third molars in mandibular anterior segment crowding.</p><p><strong>Conclusion: </strong> The findings of our study provide substantial evidence to suggest that third molars may contribute to mandibular anterior segment crowding. These findings highlight the importance of carefully evaluating dental arch dimensions and the presence of third molars when assessing and treating mandibular anterior segment crowding.</p>","PeriodicalId":12028,"journal":{"name":"European Journal of Dentistry","volume":" ","pages":"1164-1171"},"PeriodicalIF":0.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11479719/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140921771","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":"Five- and 18-Year Outcome of Two Cases with Full-Arch Rehabilitations Ad modum All-on-4 in the Presence of Challenging Conditions.","authors":"Miguel de Araújo Nobre, Diogo Santos, Ana Ferro, Armando Lopes, Carolina Jorge Antunes, Inês Vitor","doi":"10.1055/s-0044-1787961","DOIUrl":"10.1055/s-0044-1787961","url":null,"abstract":"<p><p>Placing implants in fresh postextraction sites is a borderline rehabilitation procedure. The purpose of this report is to describe the pre-, per-, and postoperative procedures for maintaining long-term stability of two full-arch rehabilitations through the All-on-4 protocol, performed in the presence of challenging conditions. Two patients were referred for full-arch rehabilitation with immediate function, with both patients presenting infection in the jaws: patient 1 with an implant (position #45) inserted in a cystic cavity; patient 2 with one implant (position #24) inserted transsinus after the removal of a cyst on the base of the maxillary sinus and another implant (position #15) inserted with a dehiscence. Both patients received a preoperative dental hygiene appointment, a regenerative surgical protocol, and were enrolled in a postoperative maintenance protocol. After surgery a provisional prosthesis was provided ensuring immediate function, and 6 months after surgery, the final prosthesis was delivered. During the follow-up appointments (final follow-up at 5 and 18 years), the implants were stable, and no infection was observed for both patients. The present case report describes two full-arch rehabilitations in immediate function, supported by dental implants inserted in the presence of challenging conditions that do not represent the norm, rather are highly demanding for the clinical team, warranting caution in the interpretation of the results.</p>","PeriodicalId":12028,"journal":{"name":"European Journal of Dentistry","volume":" ","pages":"1179-1186"},"PeriodicalIF":0.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11479728/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141751427","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":"Flexural Strength of Different Monolithic Computer-Assisted Design and Computer-Assisted Manufacturing Ceramic Materials Upon Accelerated Aging.","authors":"Niwut Juntavee, Apa Juntavee, Orapun Chansathien, Natcha Prasertcharoensuk, Boonsita Leesuraplanon","doi":"10.1055/s-0044-1785185","DOIUrl":"10.1055/s-0044-1785185","url":null,"abstract":"<p><strong>Objectives: </strong> The durability of ceramic is crucial, which is probably influenced by aging. This study evaluated the effect of aging on flexural strength of different ceramics.</p><p><strong>Materials and methods: </strong> One-hundred twenty ceramic discs (Ø 12 mm, 1.5 mm thickness) were prepared from zirconia-reinforced lithium silicate (ZLS, C), lithium disilicate (LS₂, E), precolored yttria-stabilized tetragonal zirconia polycrystalline (Y-TZP, Ip), and customized color Y-TZP (Ic). Samples were randomly divided into two groups for accelerated aging (A) between 5 and 55°C water baths, 30-second immersing time each, for 10,000 cycles, and nonaged group (N), serving as control. Biaxial flexural strength (σ) was evaluated utilizing the piston-on-three-balls at 0.5 mm/min speed. Analysis of variance and Tukey comparisons were determined for significant differences (<i>α</i> <i>=</i> <i>0.05</i>). Weibull analysis was applied for survival probability, Weibull modulus (m), and characteristic strength (σ_o). Microstructures were evaluated with scanning electron microscopy and X-ray diffraction (XRD).</p><p><strong>Results: </strong> The highest σ and σ_o were seen for IcN, followed by IcA, IpN, IpA, EN, CA, CN, and EA, respectively. CN showed the highest m, while EA showed the lowest m. Significant differences of σ for each ceramic were indicated (<i>p <</i> 0.05). Aging caused a significant difference in σ (<i>p <</i> 0.05). XRD showed t→m phase transformation of Ip and Ic after aging.</p><p><strong>Conclusion: </strong> Aging affected strength of ceramics. Comparable strength between LS₂ and ZLS was evidenced, but both were less strength than Y-TZP either aging or non-aging. Comparable strength between precolored Y-TZP and customized color Y-TZP was indicated. Better resisting aging deterioration of Y-TZP than LS₂ and ZLS is suggested for fabrication restorative reconstruction.</p>","PeriodicalId":12028,"journal":{"name":"European Journal of Dentistry","volume":" ","pages":"1124-1134"},"PeriodicalIF":0.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11479724/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140921553","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}