RESUMO
BACKGROUND: Treatment of young children under dental general anesthesia (DGA) is sometimes necessary due to lack of cooperation and the complexity of dental treatment. The aim of this study was to assess the changes in oral-health-related quality of life (OHRQoL) in children following treatment under DGA. METHODS: A consecutive sample of 88 children aged 5 and younger who were referred to the department of pediatric dentistry, Cairo university, Egypt, for treatment under DGA was included. Parents were asked to complete the Arabic version of the Early Childhood Oral Health Impact Scale (A-ECOHIS) questionnaire before and 4 weeks after treatment. The Wilcoxon signed-rank test was used to compare baseline and follow up scores. Effect sizes (ES) were also calculated. RESULTS: The overall ECOHIS scores decreased significantly from 16.72 (±7.07) to 0.9 (±3.08); (p < 0.001, Wilcoxon signed-rank test) after treatment under DGA, demonstrating a large effect size of 2.2. The scores of the two subscales of the ECOHIS, the child impact scale (CIS) and the family impact scale (FIS), also decreased significantly (p < 0.001). CONCLUSIONS: Treatment under DGA not only improved the OHRQoL of the Egyptian children in our sample significantly, but also had a positive effect on their families' quality of life.
RESUMO
INTRODUCTION: The aim of this study was to compare the shaping ability of four root canal preparation systems in newly developed 3D-printed root canal models. MATERIALS AND METHODS: For this study, 1080 3D-printed acrylic resin blocks with nine different root canal configurations were produced. They were prepared with Reciproc R25 (#25), F6 SkyTaper (#25 and #30) F360 (#25 and #35) and One Shape (#25) (N = 30 per system). Pre- and post-instrumentation images were superimposed for evaluation of the centering ratio of the different systems. Ledges, instrument fractures and preparation times were also recorded. Analysis of variance (ANOVA) and post-hoc Tukey tests were conducted, comparing the mean canal centering ratios and the mean preparation times. RESULTS: There were significant differences between all systems regarding the centering ratios in the different root canal configurations (ANOVA p < 0.001). The root canal configuration had considerable effect on the centering ratio of the instruments. The best overall mean centering ratios were achieved with F6 SkyTaper #25 instruments especially in canal configurations with big curvature angles and radii, while F360 #35 was least centered especially in canals with small curvature angles and radii. Most ledges occurred with OneShape, while it was the significantly (p < 0.001) fastest preparation system (86.7 s (SD 13.53)) and Reciproc the significantly (p < 0.001) slowest (103.0 s (SD 20.67)). CONCLUSION: 3D-printed root canals are suitable to produce challenging canal configurations and to investigate the limitations of root canal instruments. We found that all instruments caused canal transportations. However, F6 SkyTaper #25 files had better overall centering ratios than the other instruments. In canal configurations with small curvature radii, the centering ratio of some instruments is low and the probability for ledges is increased.
