Comparison of digitally assessed quality of posterior crown preparations performed with and without previous practice on patient-specific three-dimensional-printed teeth models.

Introduction: Three-dimensional (3D)-printing technology can provide customizable simulations, but its effects on patient care quality have not been well studied. This study aimed to assess the impact of practicing with patient-specific 3D-printed teeth models on the quality of patients' dental preparations performed by students transitioning to clinical training. Accordingly, the quality of posterior crown preparations was evaluated by objectively analyzing digital scans and grades in two groups: the study group, which practiced beforehand with patient-specific 3D-printed teeth models, and the control group, which did not practice with these models.

Survival rate of sealed, refurbished and repaired defective restorations: 4-year follow-up.

The most common treatment in general dental practice is the replacement of restorations affected by secondary caries or marginal deficiencies. Alternative treatments to replacement of defective restorations, such as marginal sealing, refurbishment and repair, have demonstrated improvement of their clinical properties with minimal intervention. The aim of this clinical study was to estimate the median survival time (MST) of marginal sealing, repair and refurbishment of amalgam and resin-based composite restorations with localized defects as a treatment to increase the restoration longevity.

Peripheral blood mononuclear cells acquire myofibroblast characteristics in granulation tissue.

Background: Bone marrow-derived cell populations possess progenitor cell capacities. Emerging evidence also suggests significant plasticity of differentiated mononuclear cell lineages. We therefore assessed the distribution of transplanted peripheral blood mononuclear cells (PBMCs) in granulation tissue formation, and evaluated their possible transdifferentiation into myofibroblasts.