International Journal of Dentistry最新文献

{"title":"Comparison of Histological, Clinical, and Radiographic Outcomes of Postextraction Ridge Preservation by Allogenic Bone Grafting With and Without Injectable Platelet-Rich Fibrin: A Double-Blinded Randomized Controlled Clinical Trial.","authors":"Mohammad Reza Talebi Ardakani, Zeinab Rezaei Esfahrood, Fatemeh Mashhadiabbas, Masoud Hatami","doi":"10.1155/2024/8850664","DOIUrl":"10.1155/2024/8850664","url":null,"abstract":"<p><p><b>Objectives:</b> This randomized controlled clinical trial compared the histological, clinical, and radiographic outcomes of postextraction ridge preservation by allogenic bone grafting with and without injectable platelet-rich fibrin (I-PRF). <b>Materials and Methods:</b> Twenty single-rooted maxillary and mandibular teeth to be extracted and replaced by dental implants were randomly divided into two groups (<i>n</i> = 10). Cone-beam computed tomography (CBCT) scans were obtained preoperatively to assess bone dimensions and ridge width. The teeth were then extracted, and tooth socket preservation was performed with allograft and collagen type 1 in the control group and allograft, collagen type 1, and I-PRF in the intervention group. CBCT scans were obtained again 3 months after the first stage of surgery, and the second stage of surgery was performed for implant placement, ridge width measurement, and obtaining a biopsy sample. Radiographic bone width, clinical bone width, and radiographic bone height were measured. A histomorphometric method was applied to quantify residual graft material, new bone formation, and nonmineralized tissues. The data were analyzed with Student's <i>t</i>-test and Mann-Whitney <i>U</i> test (<i>α</i> = 0.05). <b>Results:</b> The intervention group showed a significantly smaller reduction in radiographic bone width (<i>P</i>=0.038) and clinical bone width (<i>P</i>=0.033), reduction in radiographic bone height (<i>P</i>=0.213) was not significant. A significantly lower percentage of residual graft particles (<i>P</i>=0.021) and a significantly higher mean percentage of newly formed bone (<i>P</i>=0.038) than the control group. However, the difference in the percentage of nonmineralized tissue (<i>P</i>=0.208) was not significant. <b>Conclusion:</b> Despite the optimal outcome of ridge preservation in both groups, the application of allograft plus I-PRF yielded superior histological, clinical, and radiographic results compared with allograft alone, and this difference was significant in most variables.</p>","PeriodicalId":13947,"journal":{"name":"International Journal of Dentistry","volume":"2024 ","pages":"8850664"},"PeriodicalIF":1.9,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11527539/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142557798","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":"An In Vitro Exploration of Interaction Mechanisms of Intracoronal Bleaching on the Compressive Strength of Conventional and Calcium Silicate-Based Self-Adhesive Resins and Their Bonding to Composite Resin Restorative Material.","authors":"Fereshteh Shafiei, Paria Dehghanian, Shadi Tivay, Yasamin Ghahramani","doi":"10.1155/2024/6645237","DOIUrl":"https://doi.org/10.1155/2024/6645237","url":null,"abstract":"<p><p><b>Objectives:</b> The cervical resorption following intracoronal bleaching necessitates the application of impermeable cervical barriers. This study aimed to evaluate the effect of two bleaching agents on the compressive strength (CS) and shear bond strength (SBS) of two self-adhesive resins, TheraCem and Vertise Flow, to composite resin restorative material. <b>Materials and Methods:</b> Two hundred sixteen specimens from TheraCem and Vertise Flow were prepared in special molds and treated in three groups: nonbleached (control); sodium perborate-hydrogen peroxide (SP-HP) (sodium perborate +3% hydrogen peroxide); and HP gel (35% hydrogen peroxide gel). The CS of 72 specimens in the three groups was tested using a universal testing machine. For SBS test, 144 specimens from TheraCem and Vertise Flow in the three groups were bonded to Z250 composite using Single Bond Universal adhesive in self-etch and etch-and-rinse modes. SBS was measured using universal testing machine. Data were analyzed using two-way ANOVA and Tukey tests for CS and three-way ANOVA and Tukey tests for SBS. <b>Results:</b> Vertise Flow showed higher CS than TheraCem (<i>p</i> < 0.001), while none of the bleaching agents deteriorated its CS. HP gel significantly lowered the CS of TheraCem (<i>p</i> = 0.001). Bleaching agents increased the SBS of Vertise Flow while the SBS of TheraCem was not significantly affected. For both resin barriers, SBS was higher in the etch-and-rinse mode (<i>p</i> < 0.05), except in nonbleached Vertise Flow (<i>p</i> = 0.091). <b>Conclusions:</b> HP gel deleteriously affected the CS of only TheraCem during nonvital bleaching. The etch-and-rinse mode was preferred in terms of SBS for resin barriers.</p>","PeriodicalId":13947,"journal":{"name":"International Journal of Dentistry","volume":"2024 ","pages":"6645237"},"PeriodicalIF":1.9,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11521575/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142545332","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":"Influence of Light-Curing Time and Increment Thickness on the Properties of Bulk Fill Composite Resins With Distinct Application Systems.","authors":"Carlos Rocha Gomes Torres, Taiana Paola Prado, Daniele Mara da Silva Ávila, Cesar Rogério Pucci, Alessandra Bühler Borges","doi":"10.1155/2024/2123406","DOIUrl":"https://doi.org/10.1155/2024/2123406","url":null,"abstract":"<p><p>The objective of this study was to evaluate the influence of light-curing time and increment thickness on the microhardness and degree of conversion (DC) of bulk fill composite resins with different application systems. Translucency parameter (TP) was also measured. Specimens of resin composites were prepared in a circular matrix using a single increment with different thicknesses (2, 4, and 6 mm) and light-cured with distinct times (10, 20, and 40 s). The materials tested (<i>n</i> = 5 pergroup) were Filtek One (FO) bulk fill, Tetric N-Ceram (TC) bulk fill, SonicFill 3 (SF), VisCalor (VC) bulk. After 24 h, Knoop microhardness (KN) was measured, and the bottom/top ratio (B/T_ratio) was calculated. The DC was measured using Fourier transformed infrared (FTIR) spectroscopy. The TP was assessed in additional specimens with 1 mm thick (<i>n</i> = 5). The data were statistically analyzed with analysis of variance (ANOVA) and Tukey's tests (5%). Significant differences were observed for all factors, for both B/T_ratio and DC (<i>p</i>  < 0.05). The higher increment thickness and the lower curing times resulted in lower B/T_ratio and DC means. The VC and TC resins exhibited the overall higher B/T_ratio, and the highest TP. SF presented the lowest values of B/T_ratio and DC, with compromised polymerization at 6 mm depth. TP (means ± SD) were FO (12.85 ± 1.0)¹, SF (15.62 ± 0.73)², TC (20.32 ± 0.49)³, and VC (20.53 ± 0.73)³. We concluded that the greater the thickness of the increment, the lower the DC. Higher light curing times resulted on increased DC of the tested composites. The higher translucent materials VC and TC showed the greater B/T_ratio; and FO resin exhibited the higher DC values.</p>","PeriodicalId":13947,"journal":{"name":"International Journal of Dentistry","volume":"2024 ","pages":"2123406"},"PeriodicalIF":1.9,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11519075/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142545333","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":"In Vitro Efficacy of Domestic Techniques for Disinfection of Toothbrushes Contaminated With <i>Enterococcus faecalis</i>.","authors":"Gina Alessandra Donayre-Salvatierra, Julissa Amparo Dulanto-Vargas, Raul M Olaechea, Oscar Reátegui, Kilder Maynor Carranza-Samanez","doi":"10.1155/2024/3509832","DOIUrl":"10.1155/2024/3509832","url":null,"abstract":"<p><p><b>Introduction:</b> Oral hygiene education for patients is fundamental in preventive-promotional dentistry. The disinfection of toothbrushes (TBs) must be integrated into this context due to their proximity to contaminant sources that make them vulnerable to cross infection in homes. The objective of this study was to compare the efficacy of domestic techniques for disinfection of TBs. <b>Materials and Methods:</b> We performed an in vitro study of 76 TBs contaminated with <i>Enterococcus faecalis</i> (<i>Ef</i>) ATCC 29212 subjected to different disinfection protocols: G1. Distilled water (DW; negative control; <i>n</i> = 8), G2. Dimethylsulfoxide (DMSO)10% (negative control; <i>n</i> = 8), G3. Chlorhexidine (CHX) 0.12% (positive control; <i>n</i> = 15), G4. 100% white vinegar (WV; <i>n</i> = 15), G5. Microwave (MW) at 700 W (<i>n</i> = 15), and G6. 200 mg/mL of certified alcoholic extract of purple garlic (GARLIC) from Arequipa (<i>Allium sativum L</i>; <i>n</i> = 15). Bacterial count was assessed by colony-forming units (CFU/mL) categorized as contamination: low (<30), medium (30-300), and high (>300). The Kruskal-Wallis test with post hoc pairs was used at a significance level of <i>p</i> < 0.05. <b>Results:</b> Efficacy against <i>Ef</i> showed highly significant differences between groups (<i>p</i> < 0.001) with lower median CFU/mL in G3 and G4 (Me = 0 [IQR (interquartile range) = 0]: low) and G5 (Me = 6000 [IQR = 45,000]: low/medium) versus negative controls (Me = 378,500 and 5,020,000 [IQR = 4,605,000 and 6,760,000]: medium/high; <i>p</i> ≤ 0.019). The counts of the G5 were not statistically different than G3, G4, and G6 (<i>p</i> > 0.06). The G6 (Me = 1,510,000 [IQR = 590,000]: medium) was inferior to G3 and G4 (<i>p</i> < 0.001), but similar to both negative control groups (<i>p</i> > 0.999). <b>Conclusions:</b> Disinfection of TBs with CHX, WV, and MWs produces a significant effective reduction in the count of <i>Ef</i>.</p>","PeriodicalId":13947,"journal":{"name":"International Journal of Dentistry","volume":"2024 ","pages":"3509832"},"PeriodicalIF":1.9,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11511586/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142499893","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 Random and Aligned Polycaprolactone Nanofibrous Electrospun Scaffold for Human Periodontal Ligament Engineering in Biohybrid Titanium Implants.","authors":"Ihab N Safi, Basima Mohammed Ali Hussein, Aseel Mohammed Al-Khafaji, Abdalbseet A Fatalla, Ahmed M Al-Shammari","doi":"10.1155/2024/2571976","DOIUrl":"https://doi.org/10.1155/2024/2571976","url":null,"abstract":"<p><p><b>Background:</b> Stem cells are introduced to regenerate some living tissue to restore function and longevity. The study aims to isolate in vitro human periodontal ligament stem cells (hPDLSCs) and investigate their proliferation rate on plasma-treated aligned and random polycaprolactone (PCL) nanofibrous scaffolds made via an electrospinning technique to attempt periodontal-like tissue in dental implants. <b>Materials and Methods:</b> hPDLSCs were isolated from extracted human premolars and cultured on plasma-treated or untreated PCL-aligned and random scaffolds to enhance adhesion of periodontal ligament (PDL) cells as well as interaction and proliferation. Cell morphology, adhesion, and proliferation rate were evaluated using field emission scanning electron microscopy (FESEM) and the methyl tetrazolium (MTT) assay. The wettability of PCL scaffolds was tested using a goniometer. <b>Results:</b> The hydrophilicity of plasma-treated scaffolds was significantly increased (<i>p</i> ≤ 0.05) in both aligned and random nanofibers compared to the nontreated nanofibrous scaffold. Cells arranged in different directions on the random nanofiber scaffold, while for aligned scaffold nanofibers, the cells were arranged in a pattern that followed the direction of the aligned electrospun nanofibres. The rate of hPDLSC proliferation on an aligned PCL nanofiber scaffold was significantly higher than on a random PCL nanofibrous scaffold with a continuous, well-arranged monolayer of cells, as shown in FESEM. <b>Conclusion:</b> The aligned PCL nanofiber scaffold is superior to random PCL when used as an artificial scaffold for hPDLSC regeneration in PDL tissue engineering applications.</p>","PeriodicalId":13947,"journal":{"name":"International Journal of Dentistry","volume":"2024 ","pages":"2571976"},"PeriodicalIF":1.9,"publicationDate":"2024-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11502134/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142499892","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":"Concordance and Clinical Outcomes Improvement Following Oral Hygiene Motivation: A Systematic Review and Report of the Workshop of the Italian Societies of Dental Hygiene.","authors":"Antonia Abbinante, Anna Antonacci, Michela Antonioni, Andrea Butera, Matteo Castaldi, Silvia Cotellessa, Caterina Di Marco, Martina Gangale, Rossana Izzetti, Maurizio Luperini, Carolina Maiorani, Gianna Maria Nardi, Alice Ravoni, Silvia Sabatini, Sandro Sestito, Augusta Virno, Filippo Graziani","doi":"10.1155/2024/8592336","DOIUrl":"https://doi.org/10.1155/2024/8592336","url":null,"abstract":"<p><p><b>Aim:</b> A workshop on concordance and oral hygiene was held in February 2024. To address the topic, a systematic review aimed at investigating the effectiveness of motivational interventions in improving oral hygiene and focusing on periodontal clinical indices outcomes was designed. <b>Materials and Methods:</b> A comprehensive literature search was conducted across PubMed and Scopus electronic databases to identify relevant articles published up to 2024. Inclusion criteria encompassed studies comparing motivational interventions targeting oral hygiene behaviours, with a focus on periodontal clinical indices. Twelve articles meeting the eligibility criteria were selected for analysis. Quality assessment and data extraction were performed systematically. <b>Results:</b> The synthesis of findings from the selected studies revealed a consistent positive effect of motivational interventions on periodontal clinical indices. These interventions encompassed various strategies, including educational sessions, personalized feedback and motivational interviewing. Improvement in indices such as plaque index (PI), gingival index (GI) and periodontal probing depth was observed following motivational interventions, despite the variety of motivational protocols employed. <b>Conclusion:</b> Motivational interventions are effective in enhancing oral hygiene practices and improving periodontal clinical indices. Tailored motivational approaches can serve as valuable tools in promoting oral health behaviours among individuals, potentially reducing the risk of periodontal diseases. Further research is warranted to explore the long-term sustainability and scalability of motivational interventions in diverse populations and settings.</p>","PeriodicalId":13947,"journal":{"name":"International Journal of Dentistry","volume":"2024 ","pages":"8592336"},"PeriodicalIF":1.9,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11498978/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142499880","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":"Online Learning in Dental Education: Comparison of Perspectives of Lecturers and Undergraduate Students Between a Public and Private University: A Mixed-Method Study.","authors":"Kwek Ching Yung, Liong Kah Lok, Budi Aslinie Md Sabri, Fawaz Pullishery, Sobia Bilal, Divya Gopinath","doi":"10.1155/2024/7389743","DOIUrl":"https://doi.org/10.1155/2024/7389743","url":null,"abstract":"<p><p><b>Objective:</b> This study aimed to assess the undergraduates' and lecturers' perspectives on the implementation of online learning and to compare perspectives between private and public universities. <b>Materials and methods:</b> The study followed a mixed-method design and involved dental undergraduates and lecturers from two study settings in Malaysia: International Medical University (IMU), a private university, and Universiti Teknologi MARA (UiTM), a public university. All undergraduates and lecturers were invited to complete an online questionnaire with evaluative statements regarding three domains: handling, didactic benefit, motivation, and an overall assessment. The comparison of perception between the private and public universities was analyzed using Mann-Whitney test. Focus group discussions (FGDs) were carried out for undergraduates and lecturers. Each FGD consisted of six people. The audio-recorded conversations were transcribed verbatim. <b>Results:</b> Mean scores of perceptions regarding the domains, handling, and motivation were higher among undergraduates from public universities (<i>p</i>  < 0.05), while there were no differences for the didactic domain. There was no difference in perception of any of the three domains between private and public university lecturers. Mean scores for perceptions on the optimal amount of online learning in the future domains were higher among undergraduates from a public university (<i>p</i>  < 0.05), while lecturers' perceptions showed no difference. Thematic analysis of FGDs revealed that both groups from private and public universities felt that flexibility and a student-centered approach are the advantages of online learning. The inadequacy to cover the entire curriculum and lack of student engagement and interaction were highlighted as limitations. <b>Conclusion:</b> Regardless of the university background, the undergraduates and lecturers were able to adjust to the online learning environment, which mainly reflected a positive perspective on the implementation of online learning. There were modest differences in the perceptions of dental undergraduates between private and public universities, while the perception of the lecturers did not show any difference.</p>","PeriodicalId":13947,"journal":{"name":"International Journal of Dentistry","volume":"2024 ","pages":"7389743"},"PeriodicalIF":1.9,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11498980/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142499894","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":"Diagnostic Potential of Salivary Interleukin-1<i>β</i> and IL-10 for Distinguishing Periodontal Health From Periodontitis and Stable From Unstable Periodontitis: A Case-Control Study.","authors":"Zainab J Raheem, Hayder Raad Abdulbaqi","doi":"10.1155/2024/8006278","DOIUrl":"https://doi.org/10.1155/2024/8006278","url":null,"abstract":"<p><p><b>Objective:</b> This case-control study aimed to investigate the diagnostic accuracy of salivary interleukin (IL)-1<i>β</i>, IL-10, and IL-1<i>β</i>/IL-10 ratio to discriminate periodontitis from periodontal health and stable from unstable periodontitis. <b>Methods:</b> Saliva samples were collected from 135 (healthy on an intact periodontium = 45 [as healthy control], stable periodontitis = 39, and unstable periodontitis = 51) participants, and then clinical periodontal parameters were recorded. An enzyme-linked immunosorbent assay was used to determine salivary levels of IL-1<i>β</i> and IL-10. Area under the curves (AUCs), sensitivity, and specificity of IL-1<i>β</i>, IL-10, and IL-1<i>β</i>/IL-10 were estimated to discriminate between groups. <b>Result:</b> The level of salivary IL-1<i>β</i> was significantly higher in unstable periodontitis than in stable periodontitis and healthy control groups (426 ± 59, 247 ± 55, and 204 ± 36 pg/ml [picograms per milliliter], respectively). While the level of salivary IL-10 was significantly higher in the control group (360.7 ± 80.5 pg/ml) than unstable periodontitis group (146.92 ± 1.8 pg/ml), no significant difference was found between the control and stable periodontitis (317.04 ± 59.8 pg/ml) groups. IL-1<i>β</i>, IL-10, and IL-1<i>β</i>/IL-10 had significant diagnostic accuracy for differentiating healthy control from unstable periodontitis (AUCs = 0.99, 0.96, and 1; sensitivity = 0.98,1, and 1; specificity = 0.95, 0.95, and 1, respectively). Similarly, they showed significant diagnostic accuracy in distinguishing unstable from stable periodontitis (AUCs = 0.98, 0.99, and 1; sensitivity = 0.94, 1, and 1; specificity = 0.94, 0.97, and 1, respectively). <b>Conclusion:</b> Salivary IL-1<i>β</i>, IL-10, and IL-1<i>β</i>/IL-10 have a high potential to discriminate healthy control from periodontitis and stable from unstable periodontitis. <b>Trial Registration:</b> ClinicalTrials.gov identifier: NCT05722613.</p>","PeriodicalId":13947,"journal":{"name":"International Journal of Dentistry","volume":"2024 ","pages":"8006278"},"PeriodicalIF":1.9,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11496579/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142499891","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 Study to Check the Readiness of Final-Year Dental Students Vis-à-Vis to a Safe and an Independent Practitioner in Sultanate of Oman Amidst the Recent Pandemic.","authors":"Triveni Nalawade, Sanjay Saraf, Rachappa Mallikarjuna, Belal Haj-Hamed, Siva Kumar, Nutayla Al Harthy, Mohamed Al Ismaily","doi":"10.1155/2024/7476437","DOIUrl":"https://doi.org/10.1155/2024/7476437","url":null,"abstract":"<p><p>It is essential for a dental student about to graduate to possess robust fundamentals in both basic and clinical dental science. There should be a perfect harmony and blend of basic and clinical science integration and application among final year graduating students. They should also demonstrate readiness and competence in performing various clinical skills independently, after correctly interpreting and diagnosing a dental disorder. Besides the clinical aspects of dentistry, the newly graduating dental student should understand the principles of professionalism and ethos. The main aim and objective were to conduct a study to assess the impact of COVID-19 on practice readiness among the fifth-year dental students at Oman Dental College (ODC). A study was conducted to measure self-preparedness among graduating students, especially during the challenging times of the COVID-19 pandemic when education was significantly impacted. This study used a validated Dental Undergraduates Preparedness Assessment Scale (DU-PAS). The DU-PAS consists of 50 items, including 24 items related to clinical skills (part A) and 26 items related to scientific knowledge and affective skills (part B). Each item in part A was scored on a three-point scale ranging from no experience (0), with verbal and/or practical input from a colleague (1), to independently (2). Items in part B of the DU-PAS are scored on a three-point scale: no experience (0), mostly (1), and always (2). The maximum score for the 50 items on the DU-PAS is 100. Interestingly, the current study showed that the ODC final-year students were confident in performing several clinical procedures and had a good understanding of various professional aspects of clinical dentistry. The didactic online classes and preclinical sessions conducted while adhering to social distancing and other safety norms during the COVID-19 pandemic, were positively received by the students.</p>","PeriodicalId":13947,"journal":{"name":"International Journal of Dentistry","volume":"2024 ","pages":"7476437"},"PeriodicalIF":1.9,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11496577/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142499879","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 Novel 3-Dimensional Printed Nanoceramic Hybrid Resin Fixed Lingual Retainer: Characterization and Mechanical Tests.","authors":"Noor Salam Alnuaimy, Akram Faisal Alhuwaizi","doi":"10.1155/2024/3540846","DOIUrl":"https://doi.org/10.1155/2024/3540846","url":null,"abstract":"<p><p><b>Introduction:</b> An innovative retention protocol was developed to create a new 3D-printed fixed retainer employing SprintRay OnX nanoceramic hybrid resin. The feasibility and usability of the retainer were subsequently evaluated. <b>Methods:</b> Identification and characterization of SprintRay OnX was done using Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy with energy dispersive X-ray (SEM-EDX), field emission scanning electron microscope (FE-SEM), X-ray diffraction (XRD), and flexural strength. Load-deflection and pull-out tests were conducted on the 3D-printed straight wires, with three distinct cross-sectional geometries: round (1 mm), oval (1 mm × 1.5 mm) and semielliptical (1 mm × 1.5 mm). Twisted G&H and coaxial Respond stainless steel multistrand retainers were used for comparison. In the load-deflection test, a three-point bending test (3PBT) was employed. For the pull-out test, the retainer wire was inserted into the composite, which was placed in a centrally located hole of an acrylic block; the retainer wire was subjected to a tensile force along its long axis. <b>Results:</b> Characteristic bands close to those of PMMA were observed in the FTIR spectra. SEM-EDX and XRD revealed a crystalline material with homogeneously distributed Yb element signals (19.4%). On FE-SEM micrographs, small clumps were displayed on smooth surfaces. The flexural strength and the flexural modulus were, respectively, 142.48 MPa and 7.842 GPa. All groups of 3D-printed wires exhibited significantly higher load-deflection levels than the multistrand wires (MSWs). Concerning pull-out forces, they fell in between twisted G&H (96 N) and coaxial Respond (48.09 N) retainer wires. The 3D-printed wires fractured cohesively without detachment from the adhesive, suggesting that the chemical bond was adequate for satisfactory wire integration, yet the wire's strength was compromised. Concerning the cross-sectional geometry, the load-deflection and the pull-out forces of 3D-printed oval and semielliptical wires were significantly higher than that of 3D-printed round wires, which was attributed to the larger cross-sections of the wires. <b>Conclusion:</b> Oval and semielliptical 3D-printed wires offered favorable features as lingual retainers.</p>","PeriodicalId":13947,"journal":{"name":"International Journal of Dentistry","volume":"2024 ","pages":"3540846"},"PeriodicalIF":1.9,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11496588/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142499878","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}