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  1. Mussa MH, Radzi NAM, Hamid R, Mutalib AA
    Materials (Basel), 2021 Jun 15;14(12).
    PMID: 34203973 DOI: 10.3390/ma14123311
    The study aims to investigate the fire performance of reinforced concrete (RC) slab fabricated from high volume fly ash inclusion with nano-silica (HVFANS) under ISO 834 load curve. The HVFANS concrete slab with dimensions of 1850 mm × 1700 mm × 200 mm was tested via an electrical furnace under an exposing temperature of 1100 °C for 120 min. The slab behaviour was evaluated in terms of residual compressive strength, temperature distribution along its thickness, spalling, and cracks. The results revealed that the slab was capable of maintaining 62.19% of its original compressive strength at room temperature after exposure to the above temperature. Moreover, the distribution of temperature revealed that the temperature of concrete cover and bottom reinforcement was less than 300 °C with a maximum spalling depth of 11 mm within the temperature range of 680 to 840 °C. Furthermore, the thermal conductivity index (K) of the HVFANS concrete was determined, and results indicated that thermal conductivity equalled 0.35 W/mK which is considered low, as compared with other concretes tested in current and previous studies.
  2. Malek AA, Radzi NAM, Musa MFC
    Int Dent J, 2023 Aug;73(4):574-579.
    PMID: 36513555 DOI: 10.1016/j.identj.2022.11.010
    OBJECTIVES: Public dentists interested in postgraduate studies were required to complete clinical attachments at the Malaysian Ministry of Health (MOH) Dental Specialist Clinic (DSC). This cross-sectional quantitative study aimed to explore career satisfaction (CS) and barriers perceived by Malaysian dentists at Malaysia's MOH DSC.

    METHODS: A total of 208 dentists from DSC nationwide completed an online questionnaire in June 2022. Demographic data and information on dentists' expanded roles were retrieved. Responses on dentists' satisfaction and perceived barriers were collected using a 5-point ordinal scale. Mann-Whitney U and Kruskal-Wallis tests were used to compare the mean rank differences for CS. Factors influencing CS were analysed using multiple logistic regression (MLR) (P < .05).

    RESULTS: The mean age of the respondents was 32.68 ± 2.48 years. Almost half (49.0%) of the respondents were attached to a non-hospital-based clinic. The majority (72.0%) of them were permanently attached to the DSC. About half of the dentists (51.0%) strongly agreed that they received no financial incentives for their expanded role at the MOH DSC. Dentists attached at a non-hospital-based clinic (P = .046), working with more than 15 years of experience (P = .013), and having 12 to 18 months' duration of attachment (P = .014) were more satisfied. MLR analysis revealed that non-Malay respondents (odds ratio [OR], 1.54; P = .035) and those who applied for scholarships more than 3 times (OR, 1.85; P = .050) were more satisfied. In contrast, more than 19 months at the DSC decreased CS (OR, 0.44; P = .029).

    CONCLUSIONS: Despite having a similar organisational structure, DSC dentists had different satisfaction levels. Dentists' ethnicity, duration of attachment, and frequency of applying for scholarships influenced their CS. Future career advancement plans in the MOH should consider these important influencing factors to ensure the delivery of quality health care from their personnel.

  3. Bab NB, Rahman RNARA, Mohamed S, Radzi NAM, Yusof N
    Spec Care Dentist, 2024;44(4):1002-1025.
    PMID: 38480484 DOI: 10.1111/scd.12990
    BACKGROUND: The rising percentage of children and adolescents experiencing mental disorders brought attention to the emerging opportunities for proactive oral health interventions in this population. Currently, existing guidelines focus mainly on oral health in general practice and on adults residing in care homes. This report aims to provide a broad overview of the effectiveness of oral health interventions for children and adolescents with mental disorders.

    METHOD: This review followed the PRISMA (Preferred Reporting Items for Systematic Review and Meta-Analyses 2020) statement. The initial electronic search yielded a total of 3710 articles. The search identified 2354 potential papers after removing duplicates and 2301 articles were excluded by title and abstract. The full texts of the remaining 53 articles and nine articles from the citation searching were screened and 15 articles matched the inclusion criteria. The Mixed-Method Appraisal Tool (MMAT) was used for quality appraisal.

    RESULTS: The thematic analysis resulted in four main themes which were educational intervention, physical intervention, clinical intervention, and a combination of both educational and clinical intervention.

    CONCLUSION: We presented the findings in a narrative synthesis with the primary outcomes which served as answers to our main research question that prompted this systematic review.

  4. Luai AF, Malek AA, Hassan EH, Sabri BAM, Radzi NAM
    J Dent, 2024 Aug 25;150:105324.
    PMID: 39191319 DOI: 10.1016/j.jdent.2024.105324
    OBJECTIVE: To evaluate the effectiveness of immersive technologies in oral health promotion and education.

    METHODS: An extensive literature review was conducted using the Preferred Reporting Items for Systematic Review and Meta-Analysis (PRISMA) method. This study was systematically performed in six electronic databases (PubMed, Google Scholar, Web of Science, Cochrane, Scopus, and EBSCO). The risk of bias was assessed with the Cochrane tools using RoB 2.0 and ROBINS-I.

    RESULTS: PICOS criteria were formulated for study inclusion. The bibliographical search identified 10,074 articles, which were filtered subsequently. Finally, the most pertinent nine articles were included and scrutinized for data synthesis and analysis. This includes five randomized controlled trials and four non-randomized controlled trials in different countries that focused on children (33.3%), adolescents (11.1%), and adults (55.6%). The interventions used virtual reality (VR) and augmented reality (AR) to promote knowledge and attitudes towards oral care, improve toothbrushing performance, and smoking cessation, and reduce anxiety levels in oral health education.

    CONCLUSION: This systematic review demonstrates that immersive technologies, including VR and AR, significantly enhance oral health knowledge, attitudes, and self-efficacy, leading to improved health outcomes.

    CLINICAL SIGNIFICANCE: Immersive technologies such as VR and AR have the potential to provide innovative and effective methods for enhancing oral health promotion and education, while promoting positive health behaviours, which are crucial for improving overall oral health outcomes.

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