Effect of daily immersion of different beverages on the surface roughness and color stability of 3D-printed denture base resins.

Purpose: To measure the effect of daily immersion in varying beverages (distilled water, tea, carbonated beverage, and orange juice) on surface roughness and color stability of 3D-printed denture base resins.

Materials And Methods: 160 acrylic resin discs (15 × 2.5 mm) were made from heat-polymerized (HP), and 3D-printed resins (FormLabs, ASIGA, and NextDent).

The interplay between toothbrush stiffness and charcoal-containing dentifrice on the development of enamel topography changes.

Background: This study aimed to investigate the in vitro effect of a charcoal-containing dentifrice with different toothbrush stiffness on enamel.

Methods: Four main groups were applied: distilled water, conventional fluoridated toothpaste (Colgate Total 12 Clean Mint Toothpaste), charcoal toothpaste (Colgate Total Charcoal Toothpaste) and whitening toothpaste (Colgate Total Advanced Whitening Toothpaste). Three subgroups for each toothpaste were further included according to the toothbrush bristles' stiffness (soft, medium, and hard).

Radiographic assessment of dental post and core placement at different educational levels in an undergraduate student clinic: a 4-year retrospective study.

Background: Dental post and core is one of the common procedures performed after endodontic treatment. The aim of this study was to radiographically assess the quality of post and core procedures performed by dental students at different education levels in addition to determining the most critical errors encountered during their clinical practice.

Methods: A retrospective cross-sectional study design was conducted in the College of Dentistry, Imam Abdulrahman Bin Faisal University.

Influence of different printing orientations and post-polymerization time on the translucency of three-dimensional (3D) printed denture base resins.

Purpose: To evaluate the effect of different printing orientations and post-polymerization time with thermal cycling on the translucency of 3D-printed denture base resins.

Methods: Heat-polymerized (HP) acrylic resin specimens were fabricated and 3D-printed denture base materials (NextDent, ASIGA, FormLabs) were printed with different printing orientations (0, 45, 90 degrees) and subjected to different post-polymerization times (15-, 30-, 60-, and 90-min). All specimens were polished and immersed in distilled water for 1 day at 37°C.