Evaluating the Quality of Multiple Choice Question in Paediatric Dentistry Postgraduate Examinations

ABSTRACT: Objectives: This study aimed to evaluate the quality of multiple choice question (MCQ) items in two postgraduate paediatric dentistry (PD) examinations by determining item writing flaws (IWFs), difficulty index (DI)and cognitive level. Methods: This study was conducted at Mohamed Bin Rashid University of Medicine and Health Sciences, Dubai, UAE. Virtual platform-based summative versions of the general paediatric medicine (GPM) and prevention of oral diseases (POD) examinations administered during the second semester of the 2017–2018 academic year were used. Two PD faculty members independently reviewed each question to assess IWFs, DI and cognitive level. Results: A total of 185 single best answer MCQs with 4–5 options were analysed. Most of the questions (81%) required information recall, with the remainder (19%) requiring higher levels of thinking and data explanation. The most common errors among IWFs were the use of “except” or “not” in the lead-in, tricky or unfocussed stems and opportunities for students to use convergence strategies. There were more IWFs in the GPM than the POD examination, but this was not statistically significant (P = 0.105). The MCQs in the GPM and POD examination were considered easy since the mean DIs (89.1% ± 8.9% and 76.5% ± 7.9%, respectively) were more than 70%. Conclusion: Training is an essential element of adequate MCQ writing. A general comprehensive review of all programme’s MCQs is needed to emphasise the importance of avoiding IWFs. A faculty development programme is recommended to improve question-writing skills in order to align examinations with programme learning outcomes and enhance the ability to measure student competency through questions requiring higher level thinking. Keywords: Examination Question; Student; Educational Measurement; Discriminant Analysis; Pediatric Dentistry; United Arab Emirates

Information technology in the British and Irish undergraduate accounting degrees

© 2019, © 2019 Informa UK Limited, trading as Taylor & Francis Group. Using an online questionnaire and a series of semi-structured interviews, this study seeks the perceptions of accounting educators and professional accounting bodies in the UK and Ireland on the status quo of technological developments within accounting curricula and the factors influencing this status quo. Findings suggest a fairly widespread view that technological developments represent an important area that should be covered across accounting curricula, to expose changes in the marketplace and to enhance the employability of graduates. However, it is still a peripheral component in accounting curricula, with no clear agenda for change. Professional accounting bodies seem to play a hegemonic inhibiting role through accreditation requirements although other inhibitors were reported such as lack of competent/interested staff and lack of time/space in already overloaded syllabi

The Effect of Chlorhexidine on Bacterial Contamination of Hall Technique Elastomeric Orthodontic Separators and Gingival Health: A Pilot Study

Objective: To study the effect of chlorhexidine on elastomeric orthodontic separators (EOS) bacterial-colonisation and gingival-health in Hall technique (HT) patients. Material and Methods: Prospective in-vivo pilot clinical study of EOS bacterial colonisation and primary-molar gingival health assessment in 20 patients (mean age 5.45±1.27 years) requiring bilateral HT crowns (40 teeth). One side received 1-minute 0.12% chlorhexidine-soaked-EOSs (Chx-EOSs), and the other side dry-EOSs (NoChx-EOSs). The EOSs were removed five-days later and underwent a bacterial enumeration technique. Plaque (PI) and Gingival (GI) indices were assessed pre-, five-days and three-months post-treatment. Wilcoxon-Signed-Rank/McNemar-Chi-square statistics were used (p<0.05). Results: Baseline unused/packaged EOSs’ sterility check yielded zero colony-forming-units (CFU) per millilitre, but 100% of the used EOSs became colonised by oral-microorganisms. An overall trend of lower mean CFU count in Chx-EOSs (3.415± 0.78 x105 CFU/ml) compared to NoChx-EOSs (6.157±1.48 x105 CFU/ml) was observed (p=0.009). Both NoChx-EOSs and Chx-EOSs insertion sites showed evidence of gingivitis with no difference between PI and GI indices by site over time. Conclusion:There was a lower trend of bacterial colonization in chlorhexidine treated EOSs and an occurrence of gingivitis pre/post HT-treatment regardless of EOS type. The lack of difference in the gingival health may be inconclusive due to this pilot’s low power suggesting the need for robust large scale studies

The effect of chlorhexidine on bacterial contamination of hall technique elastomeric orthodontic separators and gingival health: A pilot study

Objective: To study the effect of chlorhexidine on elastomeric orthodontic separators (EOS) bacterial-colonisation and gingival-health in Hall technique (HT) patients. Material and Methods: Prospective in-vivo pilot clinical study of EOS bacterial colonisation and primary-molar gingival health assessment in 20 patients (mean age 5.45±1.27 years) requiring bilateral HT crowns (40 teeth). One side received 1-minute 0.12% chlorhexidine-soaked-EOSs (Chx-EOSs), and the other side dry-EOSs (NoChx-EOSs). The EOSs were removed five-days later and underwent a bacterial enumeration technique. Plaque (PI) and Gingival (GI) indices were assessed pre-, five-days and three-months post-treatment. Wilcoxon-Signed-Rank/McNemar-Chi-square statistics were used (p<0.05). Results: Baseline unused/packaged EOSs’ sterility check yielded zero colony-forming-units (CFU) per millilitre, but 100% of the used EOSs became colonised by oral-microorganisms. An overall trend of lower mean CFU count in Chx-EOSs (3.415± 0.78 x105 CFU/ml) compared to NoChx-EOSs (6.157±1.48 x105 CFU/ml) was observed (p=0.009). Both NoChx-EOSs and Chx-EOSs insertion sites showed evidence of gingivitis with no difference between PI and GI indices by site over time. Conclusion: There was a lower trend of bacterial colonization in chlorhexidine treated EOSs and an occurrence of gingivitis pre/post HT-treatment regardless of EOS type. The lack of difference in the gingival health may be inconclusive due to this pilot’s low power suggesting the need for robust large scale studies

Use of the Hall technique by specialist paediatric dentists: a global perspective.

Background The Hall technique (HT) is popular with UK paediatric dentists (PDs). Global PDs perception/use of HT is unknown.Aim To investigate global PDs opinions/use of HT.Materials and methods A cross-sectional questionnaire of 26 questions was sent to specialist PDs across the globe.Results Responses of 709 PDs from six continents were obtained. The majority (n = 654, 92.32%) had heard about HT but only 50.6% (n = 358) used it, with wide country variations. Respectively, 37.5%, 31.5% and 31% were neutral, against or supportive of HT when they initially heard about it. Only 17% of HT users said it was always the treatment of choice for non-pulpal asymptomatic carious primary molars (NPACPMs), 62% would take a pre-operative radiograph, 65% would consider using high speed drills before HT, 63% would never consider HT under general anaesthesia, 56% would use HT under N2O sedation. Finally, in a clinical scenario of a NPACPM in a cooperative 6-year-old, 75% of PDs would choose conventional restorative methods over the HT.Conclusion The HT is recognised, but not used, by an outright majority of PDs across the globe. Identifiable barriers such as lack of training, perception as substandard dentistry and perceived lack of evidence reduced its use

Shiga Toxin: Expression, Distribution, and Its Role in the Environment

In this review, we highlight recent work that has increased our understanding of the production and distribution of Shiga toxin in the environment. Specifically, we review studies that offer an expanded view of environmental reservoirs for Shiga toxin producing microbes in terrestrial and aquatic ecosystems. We then relate the abundance of Shiga toxin in the environment to work that demonstrates that the genetic mechanisms underlying the production of Shiga toxin genes are modified and embellished beyond the classical microbial gene regulatory paradigms in a manner that apparently “fine tunes” the trigger to modulate the amount of toxin produced. Last, we highlight several recent studies examining microbe/protist interactions that postulate an answer to the outstanding question of why microbes might harbor and express Shiga toxin genes in the environment

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