Dimensional accuracy of dental casting patterns created by 3D printers

Abstract

Contrary to widespread incise CAD/CAM, little is known about the dental application of 3D printing, especially the possibility of using 3D printing with organic material. The resin patterns of a full crown model were created by four types of 3D printers, a thermofusion device (CX), a digital light processing stereo-lithograph device (B9), a laser stereo-lithograph device (DW) and a multi-jet modeling device (PJ). The dimensional accuracy of the outer and inner diameters and depths of the created model crowns, and the surface roughness of sidewall were investigated. The outer diameters were smaller than the designed value in most conditions. The inner diameters were smaller than the designed value in any enlargement ratio except B9. The depth of CX or B9 tended to become shallower, though that of PJ or DW tended to increase. The surface roughness along the tooth axis direction was greater than that perpendicular to the tooth axis.

Correlations among bending test methods for dental hard resins

“…The regression analysis using the Weibull characteristic strength of the three bending tests showed that the coefficients of determination were very large, especially for the combination of the 4-point bending strength and biaxial flexural strength (the determination coefficient of the combination of the 3-point bending strength and 4-point bending strength was 0.888, that of the 3-point bending strength and biaxial flexural strength was 0.920 and that of the 4-point bending strength and the biaxial flexural strength was 0.991). These results also indicated that the biaxial flexural test is an effective valid test method for dental HRs with high filler content 18,19) , such as dental CAD/CAM hybrid resin, which was approved for use for premolars by the Japanese national health insurance program in 2014 [20][21][22] , and may be used to develop stronger HRs in the future.…”

3D printed replicas for endodontic education

“…Moreover, there is a wide selection of different printers and manufacturers to choose from. Although MultiJet Printers are considered more accurate in comparison with SLA or DLP printers (Ishida & Miyasaka ), their investment costs are significantly higher. For a dental school, the most efficient solution seems to be a device which is suitable for creating educational models as well as for the production of applications in patient's care.…”

Nano-biphasic calcium phosphate/polyvinyl alcohol composites with enhanced bioactivity for bone repair via low-temperature three-dimensional printing and loading with platelet-rich fibrin

“…5 3D printing is a broad concept that can be classified as additive manufacturing. Common additive technologies applied in medicine include selective laser sintering, 12 fused deposition modeling, 13 multi-jet modeling, 14 stereolithography, 15 powder-based printing, 16 and robocasting. 17 All of these techniques can be used to rapidly fabricate products with specific shapes, well-defined internal structures, and highly interconnected porosities.…”