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Context: Immunodeficiency virus infection is a major health crisis. It can spread to other people by transmission of the body fluid. The knowledge about this viral infection can aid in preventing its transmission and help in delivering successful dental care to these patients. Aims: To evaluate the human immunodeficiency virus (HIV)/acquired immunodeficiency syndrome (AIDS)-related knowledge and attitude of dental students and also to compare knowledge and attitude between a student's gender and different clinical levels (second, third vs. fourth to seventh years). Settings and Design: A cross-sectional study was conducted among dental students at the college of dentistry in Umm Al-Qura University in Makkah, KSA. Methods and Material: A validated survey was sent electronically to dental students from the second year to seventh year. The questionnaire contained 12 knowledge and 13 attitude questions about treating HIV/AIDS patients. Descriptive statistics were presented for the knowledge and attitude of the dental students about HIV/AIDS. Also, the knowledge and attitude were compared using t-test in relation to gender and clinical year. Results: The response rate was 65%. The mean and standard deviation (SD) for the knowledge score was 8.32 ± 1.60 out of 12. There was no significant difference between gender and a student's clinical level. In the majority of the attitude questions, more than half of the students had favorable attitude toward HIV/AIDS subjects. Females had more favorable attitude as well as students with more clinical years of experience. Conclusions: Dental students showed acceptable knowledge and positive attitude toward HIV/AIDS patients. Students who were females and with higher clinical years demonstrated better attitude but similar knowledge to males. [ABSTRACT FROM AUTHOR]

Background: Dental erosion is an irreversible damage to hard tissues in the mouth due to acid dissolution not induced by microorganisms. Oral medications contributed to the etiology of dental erosion. Among these medications, antihistamine-containing syrups were reported to have a considerable erosive effect on hard dental tissues. Objective: The objective was to evaluate the effect of Zamzam water on the microhardness of primary tooth enamel after erosion induced by Claritin™ syrup. Materials and Methods: The present in-vitro study was conducted on 25 primary central incisor teeth. The labial surfaces of the specimens were prepared for microhardness testing. Baseline microhardness was measured first, then the samples were submerged in the erosive agent Claritin™ syrup, for 30 min every 12 h for 12 days. Thereafter, all the teeth were placed in Zamzam water for 30 min every 12 h for 12 days. The microhardness was measured by the Vickers hardness tester and expressed as Vickers microhardness value (VH). The measurements were completed three times for the same sample: baseline, after erosion, and after Zamzam treatment. Data were analyzed statistically using one-way repeated analysis of variance (ANOVA) followed by Tukey’s post hoc test. Results: The primary teeth included in this study showed a significant increase in their surface microhardness after Zamzam water treatment; the mean value of VH was increased from 33.12 ± 1.62 to 89.32 ± 8.52 (P-value <0.0001). Conclusion: Zamzam water could be introduced as a part of the management of dental erosion in the primary dentition. [ABSTRACT FROM AUTHOR]