Effect of silver diamine fluoride/potassium iodide treatment on the prevention of dental erosion in primary teeth: an in vitro study.

INTRODUCTION: Dental erosion has a great effect on oral health, when diagnosed it is irreversible, this sets the importance of different preventive measures being investigated against dental erosion. AIM: This in vitro study aims to evaluate the effectiveness of silver diamine fluoride and Potassium iodide (SDF-KI) in comparison to casein phosphopeptide-amorphous calcium phosphate fluoride (CPP-ACPF) varnish, sodium fluoride (NaF) varnish, silver diamine fluoride (SDF) alone and deionized water as a control group in the prevention of dental erosion in primary teeth and assessing its staining effect. MATERIALS AND METHODS: Forty deciduous teeth enamel specimens were randomly allocated into the five study groups. Tested materials were applied. An erosive challenge was done by immersing the specimens in a citric acid-containing soft drink with pH 2.85, for 5 min, 4 times/day, for 5 days. Changes in surface microhardness, mineral loss, and color change were evaluated besides recording of the surface topography and surface roughness for selected specimens. RESULTS: The highest decrease in surface microhardness was recorded in the control group (-85.21 ± 10.60%), with a statistically significant difference (p = 0.002). SDF-KI group (-61.49 ± 21.08%) showed no statistically significant difference when compared to CPP-ACPF, NaF, and SDF groups. For calcium and phosphorous loss, control group was statistically significantly higher compared to the treatment groups (p = 0.003) and (p < 0.001) respectively, while there was no statistically significant difference between the tested treatment groups. The highest mean value for color change was recorded in SDF group (26.26 ± 10.31), followed by SDF-KI group (21.22 ± 12.87) with no statistically significant difference between groups. CONCLUSIONS: SDF-KI is as effective as CPP-ACPF, NaF varnishes and SDF in the prevention of dental erosion in primary teeth, there was no statistically significant difference regarding its staining potential.

Fracture resistance of prefabricated versus custom-made zirconia crowns after thermo-mechanical aging: an in-vitro study.

BACKGROUND: Prefabricated zirconia crowns for a young permanent molar is a child-friendly solution for restoring a permanent molar at a young age. This in-vitro study aimed to compare the fracture resistance of prefabricated versus custom-made permanent molar crowns. METHODS: 16 identical resin dies were fabricated to receive permanent molar zirconia crowns, dies were divided into 2 groups, 1) received perfricated crowns, 2) custom-made crowns. Thermo-dynamic cycling was performed to simulate 6 months in the oral cavity, Fracture resistance of each group was assessed by applying increasing load till fracture. Data were tested for normality using Shapiro-Wilk and Levene's tests. Data were analyzed using independent t test. RESULTS: No statistically significant difference was found between fracture resistance of prefabricated and custom-made crowns (1793.54 ± 423.82) and (1987.38 ± 414.88) respectively. 3 crowns of the custom-made group fractured with the underlying die, versus zero dies fractured in the prefabricated group. CONCLUSIONS: Prefabricated permanent molars zirconia crowns can perform as well as custom-made crowns for an adult in terms of fracture resistance, it is suitable for children and can withstand the occlusal forces of an adult.

Influence of different personal protective equipment on children's anxiety in dental office: a randomized controlled trial.

BACKGROUND: A change in how a dentist looks may affect the child's anxiety in the dental office. This study compared the effect of conventional facial PPE versus extra PPE as reusable respirators; on the preoperative child's anxiety in the dental office. METHODS: Fifty two children were randomly allocated into 4 groups, (1) goggles + surgical mask, and (2) face shield + surgical mask versus (3) half-face respirator and (4) full-face respirator. Each child was communicated with and clinically examined by a dentist wearing the assigned PPE, and then his anxiety was assessed using CFSS-DS. Shapiro-Wilk's test was used to analyse normality. Kruskal-Wallis test followed by Dunn's post hoc test with Bonferroni correction test, were used to analyse non-parametric anxiety score data. Correlations between different factors and anxiety scores were analysed using Spearman's rank-order correlation coefficient. RESULTS: There were no statistically significant differences in the number of anxious children in each group, boys had significantly higher scores than girls (p < 0.001) For the "Goggles and surgical mask" group and "overall". There was no significant correlation between age and anxiety scores. Children who didn't have a previous dental visit had statistically significant higher scores than children with previous experience for "Goggles and surgical mask", "Face shield and surgical mask "groups and "overall". CONCLUSIONS: Half-face and full-face respirators have not affected the child's preoperative anxiety in the dental office when compared to the conventionally used PPE. Overall, there is an association between gender and previous dental visits, and dental anxiety, however; there is no correlation between child's age and dental anxiety. Dentists dealing with children should feel free to use reusable respirators, without the risk of affecting children's anxiety in the dental office. Trial Registration This study was registered on www. CLINICALTRIALS: gov , ID: NCT05371561 on 12/05/2022.

Hybrid versus distance learning environment for a paediatric dentistry course and its influence on students' satisfaction: a cross-sectional study.

BACKGROUND: During the novel COVID-19 pandemic, many universities adopted distance and hybrid learning as a modification to their teaching methods to ensure continuity of education, abiding by the worldwide recommendations of social distancing. AIM: To compare learning environments created through hybrid learning versus distance learning, to deliver paediatric dentistry course, and to assess the correlation between the created learning environment and students' satisfaction. METHOD: In this cross-sectional study, students enrolled in a hybrid paediatric dentistry course were asked to participate in an electronic survey. The learning environment was assessed using Distance Educational Learning Environment Survey (DELES), students' satisfaction was assessed using Satisfaction Scale (SS). Retrospective data for distance learning course was used for comparison. Ordinal data were compared using Mann-Whitney U test. Spearman's rank order correlation coefficient was used to correlate students' satisfaction with DELES. Multiple regression analysis was used to predict satisfaction. RESULTS: A total of 376 students' data were considered in the study. Hybrid learning had significantly higher scores than distance learning in 3 DELES scales. There was a statistically significant weak positive correlation between satisfaction and DELES. Multiple regression analysis model was statistically significant and accounted for (22.8%) of the variance in students' satisfaction. Only "Instructor support" (p = 0.001) and "Student autonomy" (p < 0.001) had a significant effect on satisfaction. CONCLUSION: This study supports the superiority of a hybrid learning environment over a complete distance learning environment, it also shows that satisfaction is correlated and can be predicted by the created learning environment. TRIAL REGISTRATION: This study has been registered on clinicaltrials.gov on 21 May 2020 with an identifier: NCT04401371 .

Validation of the Arabic translation of the caries impacts and experiences questionnaire for children.

BACKGROUND: The recently developed Caries Impacts and Experiences Questionnaire for Children (CARIES-QC) is originally an English questionnaire targeting the assessment of caries-related quality of life from a child's point of view. AIM: This study aimed to translate and adapt the CARIES-QC into the Arabic language and to test its reliability and validity on Arabic-speaking children. DESIGN: A total of 234 children aged 5-16 years answered the translated questionnaire. Internal consistency was measured using Cronbach's alpha; 62 children answered the questionnaire again to evaluate the test-retest reliability by calculating the intraclass correlation coefficient (ICC). Convergent validity was evaluated by correlating question scores with global question scores. Confirmatory factor analysis (CFA) was conducted to evaluate cross-cultural validity. RESULTS: Cronbach's alpha of the CARIES-QC/A was 0.905. The inter-item correlation coefficients of the CARIES-QC/A ranged from 0.240 to 0.850. The total ICC score was 0.960. CFA demonstrated acceptable fit to the data in the one-factor model. Convergent validity indicated moderate correlation with the global question (rs  = .740). CONCLUSION: The CARIES-QC/A is a valid and reliable tool that could be used to evaluate oral health-related quality of life in Arabic-speaking children.

Influence of luting cement on the clinical outcomes of Zirconia pediatric crowns: A 3-year split-mouth randomized controlled trial.

BACKGROUND: There is no scientific evidence supporting the choice of luting cement for cementation of zirconia crowns. AIM: The purpose of this split-mouth study was to compare the efficacy of using bioactive cement versus packable glass ionomer for cementation of posterior pediatric zirconia crowns. DESIGN: Fifty first mandibular primary molars were restored by zirconia crowns and were randomly divided to be luted with either (a) bioactive cement or (b) packable glass ionomer. Crowns' retention, fracture, and gingival condition were evaluated at 1 week, and 1-, 3-, 6-, 9-, 12-, 18-, 24-, and 36-month intervals. Statistical analysis was carried out using Fisher's exact test, Kaplan-Meier survival analysis, and Wilcoxon signed rank test. RESULTS: At 3- to 36-month follow-ups, there were statistically significant (P = .009-≤.001) less debonded crowns in packable glass ionomer group. There were no fractured crowns for either cements. There was no statistically significant difference between gingival index scores. CONCLUSIONS: Packable glass ionomer is more retentive than bioactive cement when used for cementing zirconia pediatric crowns. Posterior zirconia pediatric crowns have high fracture resistance after 36 months of clinical performance, irrespective of luting cement. Luting cement for zirconia pediatric crowns has no apparent effect on gingival condition around crowns.