Aims: The aim was to evaluate the effect of different surface treatments on the repair shear bond strength of aged resin composites. Materials and Methods: Forty cylindrical-shaped specimens were treated from each material: Tetric Evo Ceram, Neo Spectra, and Filtek Ultimate Universal Restorative and allocated into four groups according to the surface treatment planned to use: Group 1: diamond, Group 2: silica coating, Group 3: carbide burs, and Group 4: control group. Following the surface treatment, composites were repaired with flowable resins. The shear bond strength was tested using a universal testing machine at a crosshead speed of 0.5 mm/min. The fracture mode was assessed under 50× magnification. The data were analyzed statistically using a two-way analysis of variance (ANOVA) test followed by a one-way ANOVA test. Multiple comparison procedures were performed using Tukey’s test. The level of significance was set at P < 0.05. Results: The lowest mean value of the shear bond strength was for the Filtek Ultimate Universal Restorative in the control group, whereas the highest mean value was in the silica group. Silica and carbide groups had significantly higher mean values of the shear bond strength than diamond and control groups in Tetric EvoCeram and Filtek Ultimate Universal Restorative. In contrast, in Neo Spectra St HV, the carbide group had a higher mean value but was not statistically significant. Conclusion: Combinations of mechanical and chemical retentive systems enhance the shear bond strength of the repair composite to the aged composite. Among the different surface treatments employed in this study, silica and carbide groups show higher repair bond strength of new composite to aged composite.

To explore the different treatment methods employed in managing deep carious lesions (DCL) of vital primary teeth among pediatric dentists practic.ing in Saudi Arabia. We also want to find out whether the experience of pediatric dentists has any influence on clinical decision-making in managing DCL in primary teeth. This online questionnaire-based cross-sectional study was carried out among pediatric dentists practicing in Saudi Arabia. We used a self-administered questionnaire consisting of five sections: demographic data, clinical decisions in managing DCL, clinical protocols, and dentist's knowledge about allowing carious dentin to remain under a restoration. The questionnaire was administrated electronically via SurveyMonkey. A total of 216 pediatric dentists participated in the study, in which nearly 60% were males. Most dentists reported that they preferred partial caries removal (63%), and the Hall technique (68%) was the mostly practiced method in managing DCL. Nearly 93.5% of the dentists reported performing indirect pulp capping before placing a permanent restoration, and the most preferred liner was Dycal (60%). About 47.2% of senior dentists reported practicing complete caries removal. Multivariate logistic regression analysis revealed that younger dentists (5-10 years) preferred practiced partial caries excavation two times more often than senior dentists (>10 years). Pediatric dentists should focus on minimally invasive approaches such as partial caries excavation for DCL treatment. Pediatric dentists, especially senior practitioners, should be educated and trained to adopt minimally invasive strategies in managing DCL, reducing unnecessary risks such as iatrogenic pulpal damage.

This study aims to evaluate the knowledge and attitude toward mental illness among dental students and interns. To examine dental students’ knowledge and attitude about mental disorders, a self-administered questionnaire was designed, tested, and disseminated to dental students and interns through social outlets, participation was voluntary after consenting. A total of 125 dental students and interns participated in the study. Data were statistically analyzed using SPSS. Our results displa