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. K E Y W O R D Sbioactive cement, cementation, packable glass ionomer, pediatric crowns, zirconia | 315 AZAB et Al.

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Prevalence of MIH in a convenience sample of Egyptian children aged 8-12 years old was (2.3%), Molars were the most prevalent teeth affected, and further studies are recommended to better understand the aetiology of the disease.

This systematic review was performed to compare the effectiveness of two concentrations (12% versus 38%) of silver diamine fluoride (SDF) in arresting cavitated dentin caries among children. or languages were involved. Full-text versions of the papers that appeared to meet the inclusion criteria were retrieved for further assessment and data extraction. The initial search identified a total of 373 articles; three publications were found to meet the inclusion criteria. Risk of bias assessment was performed. The three publications agreed that the 38% SDF had a higher chance of arresting dentin caries in primary teeth than the 12% SDF concentration. Further trials are needed for establishing a suitable protocol in the view that the higher the SDF concentration and frequency of application, the higher the incidence of black staining.