Saudi Cultural Missions Theses & Dissertations
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Item Restricted REPRODUCIBILITY OF CONVENTIONAL, DIRECT DIGITAL, AND INDIRECT DIGITAL IMPRESSIONS IN CAPTURING THE WIDTH OF THE FINISH LINE IN PROXIMAL AREA: AN INVITRO STUDY(University of Dundee, 2023-11) Alghafes, Mohammed; Cherukara, GeorgeBackground: Several studies have attempted to compare intraoral scanning versus conventional impression methods. However, only a few studies have delved into the impact of diverse types of impressions 'in reproducing the finish line preparation. This in-vitro study aims to compare the reproducibility of the proximal width of the finish line from a 3D printed model with conventional, direct, digital and indirect digital impressions.Material and methods: 3D models were designed using Autodesk Fusion 360 software(Education License) and printed using Asiga printer MAX(Asiga, Alexandria NSW 2015, Australia), incorporating 32 prepared teeth in upper and lower jaws. Three Conventional impressions using (PVS) were made, and three direct digital scanning of the 3D-printed model was performed. Additionally, three indirect digital scanning using 3Shape D800 scanner (3Shape A/S Holmens Kanal7 1060 Copenhagen Denmark) of the conventional impression was conducted. The resulting data were meticulously analysed using Autodesk Fusion 360 software.Results:Statistical analysis shows high intra-rater reliability, while interrater reliability shows low intraclass correlation between different measurement groups of finish line width measurements based on the technique employed, anatomical location and materials used. Direct digital impressions exhibited superior accuracy and reliability, showcasing their potential transformative impact on clinical dentistry. In contrast, indirect digital impressions demonstrated decreased accuracy in measuring finish line width. Conclusion:This study underscores the crucial influence of impression techniques on capturing the proximal width of the finish line. Direct digital methods emerged as the most precise and reliable, offering revolutionary possibilities for dental practice. The findings emphasize the importance of careful technique selection, practitioner proficiency, and material quality in achieving optimal clinical outcomes in dental impressions.32 0Item Restricted Accuracy of milled lithium disilicate crowns fabricated by using CBCT and IOS-based digital models(Rutgers school of dental medicine, 2023) Jassoma, Elaf; Morgano, Steven; Muadab, RamiObjectives To evaluate the trueness and precision of digital casts generated from intraoral scanning (IOS) and cone beam computed tomography (CBCT). Also, to assess the marginal integrity of milled lithium disilicate (LD) crowns that were fabricated from the IOS and CBCT digital casts. Materials and methods Tooth preparation for an all-ceramic crown was performed on a segmented cast that was later scanned as a master model. Scans were obtained; 10 conventional polyvinyl siloxane impressions were made that were scanned by using CBCT, 10 digital scans by using IOS, and 10 digital scans by using a desktop scanner. DICOM data of the CBCT were converted to STL files. The reference STL file was segmented and prepared for 3D comparison. The 3D comparison was performed to compare the IOS group and CBCT group to the reference STL files. Trueness was determined by measuring the root mean square (RMS) for each group. The data were analyzed by using paired samples t-test. The digital casts from each group were used to fabricate all-ceramic crowns; 10 crowns from a tabletop scanner (reference) digital model, 10 crowns from the IOS digital model, and 10 crowns from the CBCT digital model. Crowns were milled by using IPS emax CAD. The replica method was used to evaluate the marginal integrity of the milled crowns. The thickness of the cross-section of the replica was measured under scanning electron microscopy (SEM). Descriptive statistics of mean and standard error of trueness and marginal gaps for all groups were recorded and compared by applying paired sample t-test and repeated measures ANOVA test, respectively. All the data were analyzed by using statistical analysis software program SPSS, version 29.0. Results The accuracy of the CBCT group was shown to be statistically significantly different from that of the IOS group, based on the results of the paired sample t-test. Crowns made from digital models created by CBCT exhibited a marginal gap that was substantially higher (P < 0.001) than crowns made by using IOS models. Conclusions Within the limitations of this study, it can be concluded that CBCT generated models are statistically significantly less accurate when compared with a Trios 3 IOS, and when compared with a reference tabletop scanner. Additionally, lithium disilicate all-ceramic crowns fabricated from CBCT models recorded more marginal gap when compared with both the control and IOS groups.37 0Item Restricted Perceptions of School Leaders about Digital Communication in the Saudi Education System(Tennessee State University, 2024-05) Alshahrani, Nasser M.; Gundi, KirmanjThe purpose of this study was to determine the perceptions of school leaders in Bisha about digital communication in the Saudi education system. The purpose of the current study was also to identify the attitudes of school leaders towards digital communication in terms of factors affecting the acceptance and use of digital communication in the educational process, and to identify the extent of performance and the expected benefit from the use of digital communication systems by school leaders in the Saudi educational system. This study also attempted to test the impact of some factors, such as ease of use, perceived usefulness, and behavioral intention in the actual use of digital communication technologies, and to reveal the obstacles facing school leaders in the Saudi education system while using digital communication technologies, and their suggestions for developing the use of these technologies in the educational process. One of the key findings of the study is that the presence of high levels of satisfaction among school leaders in the Saudi education system with the use of digital communication. They emphasized the importance of focusing on training courses to enhance the technical capabilities of school leaders, teachers, and students. Importantly, the study revealed that there were no statistically significant differences based on educational qualifications, leadership experience, or participation in training courses, indicating a consistent trend of positive attitudes toward digital communication among school leaders.11 0Item Restricted An investigation of AI in talent management in luxury hospitality in the UK (United Kingdom)(Saudi Digital Library, 2023-09-29) Alshalah, Zahra; Marinakou, EvangeliaAn investigation has been conducted into the implementation of artificial intelligence in the luxury hospitality sector of the United Kingdom. Digitalization is influencing the business operations of the hospitality sector from a variety of perspectives, including talent management. Managing talent is critical to the success of business operations in the luxury tourism sector, since it is a fundamental component of providing a better level of service to customers. There is no doubt that the hospitality industry is one of the largest in the United Kingdom. Hoteliers have been assisted greatly by artificial intelligence in managing their talent in recent years. Yet most human resources managers in luxury hotels in the United Kingdom are unaware of the existence of this technology, which is the reason for their slow growth. The purpose of this specified dissertation paper is to provide an in-depth analysis and discussion regarding the various challenges that various HR managers are undergoing while implementing AI technology within the hospitality industry in the UK. As well as the variety of approaches through which these challenges can be mitigated, this article discusses various ways through which all of these challenges can be mitigated. Artificial intelligence has been found to be able to facilitate the recruitment process. By doing so, Human Resources professionals have been able to reduce their workload. Additionally, it is used to train employees, make cognitive decisions, and select resumes for employment.132 0