Comparison of the Radiopacities of Different Root-End Filling and Repair Materials

This study evaluated the radiopacity of 3 repair materials, Biodentine, MM-MTA, and MTA Angelus. Standardized cylindrical rings were prepared. Samples of Biodentine MM-MTA and MTA Angelus were prepared ( in each group), filled into the rings, and preserved at 37°C until setting. A 1 mm thick dentin slice was used as control. All set specimens were removed and radiographed along with the dentine slice and a graduated aluminium step wedge. Digital images were transferred to the computer using a software. The radiographic densities of the specimens were determined, and the values were converted into millimetres of aluminium (mm Al). One-way ANOVA was used for intergroup comparison, whereas Tukey HSD test was used for detecting the group with the difference. The mean radiopacities of Biodentine, MTA Angelus, and MM-MTA were 2.8 ± 0.48, 4.72 ± 0.45, and 5.18 ± 0.51 mm Al, respectively. The radiopacity of Biodentine was significantly lower compared to other materials (), whereas no significant difference was noted between MTA Angelus and MM-MTA (). All materials had significantly higher radiopacities compared to dentine. The relatively lower radiopacity of Biodentine can be improved to achieve more reliable results in procedures such as retrograde fillings

AN ENRICHMENT IMPLEMENTATION IN THE EDUCATION OF GIFTED STUDENTS: BIOMIMICRY WITH THE MACRO, MICRO, AND SUB-MICRO NATURE OF FRESHWATER CREATURES

Biomimicric implementations provide positive contributions to the development of many abilities such as problem solving, creative thinking and productivity by enabling students to look at nature from a different perspective. For this reason, in this study, it was investigated how the biomimicric applications of the macro, micro, and sub-micro nature of freshwater creatures were reflected in their arguments with special gifted students. The research was planned as a summer workshop in an institution that teaches with special gifted students in Ankara in the 2017-2018 academic year, and was carried out on the basis of case study from qualitative research patterns with eight gifted students. In a two-stage study, gifted students conducted microscopic and literature research on freshwater creatures in the first stage and made drawings about the macro, micro, and sub-micro nature of living things. In the second phase, they discussed their biomimicric prototypes in groups and explained them with their arguments. In the study based on document analysis, the data were obtained from students' worksheets and analyzed by content analysis. As a result of the research, it can be said that the concept images of gifted students develop with macro, micro, and sub-micro drawings and the quality of the arguments they construct has become more qualified during the process, and the application contributes to their creative and analytical thinking

An Overview of Clinical Studies on Fiber Post Systems

Intraradicular posts are useful adjuncts in the restoration of endodontically treated teeth. These systems have undergone a significant evolution in recent years, and fiber-reinforced systems have started to be incorporated into routine clinical care more frequently. Despite the high number of laboratory studies pertaining to the characteristics of fiber posts, clinical studies evaluating their general success rates are rather limited. Since clinical investigations are reliable means to achieve information about the general behavior pattern of materials or techniques, assessment of this data will be beneficial to have a better understanding of fiber-reinforced intraradicular post systems. The purpose of this paper was to make a summary of clinical studies regarding various fiber posts. A PubMed search was conducted and articles dating back to 1990 were retrieved. The paper provides an overview of clinical studies on fiber posts specifically in the last decade as well as commentary analysis

Reasons for choosing dentistry as a career among dental students in Saudi Arabia

Objective: This study aimed to identify reasons and influential factors for choosing dentistry as a career among dental students in Saudi Arabia. The preferred field of dental specialty following graduation will also be investigated. Materials and Methods: A questionnaire was developed and circulated among undergraduate dental students studying at a private dental college in Saudi Arabia. A list of 16 reasons that possibly influenced students’ decision to study dentistry was presented and participants were invited to indicate on a 5-point Likert scale the extent each reason influenced their choice of dentistry as a career. The listed reasons were categorized into economic, professional, vocational, social and personal reasons. Results: Totally, 788 out of 970 questionnaires were completed (response rate: 81%). Proportion of female students exceeded proportion of male students (59% and 41%, respectively) and most participants were Saudi students (73%). The top three influential factors on students’ decision to study dentistry were “Dentistry is a prestigious profession,” “I like to treat people and improve their appearance,” and “I like working with people and caring for them.” Variations were identified between male and female students and also between Saudi and non‑Saudi students in the reasons to choose dentistry as a career. The vast majority of participants (94%) expressed a desire to follow a postgraduate study. Orthodontics and oral surgery were the most preferred dental specialties. Conclusion: The social and vocational reasons were the main factors that motivated this group of dental students to attend a dental program. Greater training opportunities should be planned to accommodate the speculated increasing demand for postgraduate dental education in Saudi Arabia

Development and psychometric testing of an instrument to compare career choice influences and perceptions of nursing among healthcare students

Background: With the availability of more healthcare courses and an increased intake of nursing students, education institutions are facing challenges to attract school leavers to enter nursing courses. The comparison of career choice influences and perception of nursing among healthcare students can provide information for recruitment strategies. An instrument to compare the influences of healthcare career choice is lacking. The purpose of this study is to develop and evaluate the psychometric properties of an instrument to compare the influences of healthcare career choice with perceptions of nursing as a career choice. Methods: The study was conducted in two phases. In phase one, two sets of scales with parallel items that measure the influences of healthcare career choice and perceptions of nursing as a career choice were developed through an earlier qualitative study, literature review, and expert validation. Phase two involved testing the construct validity, concurrent validity and reliability with a convenience sample of 283 first year healthcare students who were recruited at two education institutions in Singapore. Results: An exploratory factor analysis revealed 35-parallel items in a six-factor solution (personal interest, prior healthcare exposure, self-efficacy, perceived nature of work, job prospects, and social influences) that explained 59 and 64% of the variance for healthcare career choice and nursing as a career choice respectively. A high correlation (r = 0.76, p \u3c 0.001) was obtained with an existing tool, confirming the concurrent validity. The internal consistency was sufficient with Cronbach’s alpha of 0.93 for healthcare career choice and 0.94 for nursing as a career choice. The test-retest reliability was acceptable with an Intraclass Correlation Coefficient of 0.63 for healthcare career choice and 0.60 for nursing as a career choice. Conclusions: The instrument provides opportunities for understanding the differences between influences of healthcare career choice and perceptions of nursing as a career choice. This comparative understanding of career choice influences can guide educator and policy-makers on nursing recruitmen