Publications by authors named "J R Satterthwaite"
Article Synopsis
- The study evaluated how storage in acidic environments, specifically gastric acid and Coca-Cola, impacts the mechanical properties of CAD/CAM dental materials, including a polymer-infiltrated ceramic network (Vita Enamic), a resin composite block (Cerasmart), and a conventional resin-based composite (Gradia direct).
- After 96 hours of exposure, it was found that the Cerasmart and Vita Enamic materials maintained their flexural strength and elastic modulus, while the Gradia direct material showed a significant decline in flexural strength when stored in gastric acid.
- All materials experienced a decrease in microhardness, with the Gradia direct showing the most significant reduction, and gastric acid causing greater microhardness loss than
Article Synopsis
- The integration of CAD-CAM technology in restorative dentistry has changed the game by incorporating both additive and subtractive manufacturing techniques, yet questions about how print orientation affects the mechanical properties of 3D printed resin materials persist.
- This study aimed to analyze how different print orientations and artificial aging impact the flexural strength (FS) and flexural modulus (FM) of selected 3D printed resins used for definitive and interim dental restorations.
- Results showed that print orientation significantly affects FS and FM, with specimens printed at a 90-degree angle demonstrating better mechanical properties compared to other orientations, particularly among definitive resin materials.
Although advancements in CAD/CAM technology allow for more personalized treatments, it is not clear how modifications in the CAD/CAM milling process could affect the restoration surface conditions and their mechanical behavior. The objective of this study was to evaluate the effect of different CAD/CAM milling protocols on the topography and fracture behavior of zirconia monolithic crowns (3Y-PSZ) subjected to a chewing simulation. Monolithic 3Y-PSZ premolar crowns were milled using three protocols ( = 13) (slow (S), normal (N), and fast (F)).
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- Three-dimensional (3D) printing is being increasingly used in dentistry for producing restorations, thanks to its accuracy and cost-effectiveness, but the material properties can vary based on the printing orientation.
- This study aimed to investigate how different printing orientations and the effects of artificial aging influence the hardness and indentation modulus of various 3D-printed dental resins.
- Results showed that 90° printed specimens generally had the highest hardness at specific times, though after 90 days of aging, hardness levels across orientations were similar, with milled materials demonstrating superior hardness compared to certain 3D-printed resins.
Article Synopsis
- Bioceramic coatings can enhance bone repair and the integration of dental implants, which was the main focus of this study.
- Three different dental implant alloys (two titanium types and one titanium-zirconia) were tested for changes in surface characteristics after air abrasion with bioceramic powders.
- Results showed that while bioceramic application affected surface roughness, changes in calcium and phosphate content were not significantly different across groups, and the treatment continued to dissolve over three weeks.