Adhesion Strength of Ceramic Coatings to Dental Ni–Cr Alloy Fabricated by Casting with 3D Printed Patterns

Dikova, Tsanka; Долгов, Н. А.; Vasilev, Tihomir; Katreva, Iv.

doi:10.1134/s0036029519040086

Cited by 3 publications

(3 citation statements)

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“…According to the majority of authors, the high roughness of the cast patterns, made by 3D printing, is their disadvantage. Our studies, in which 3D printed cast models without additional processing for increasing their smoothness were used, showed that the adhesion strength of the porcelain coating to dental alloys, cast with them, is higher than that of the conventionally cast [16,17].…”

Section: Specifics In Manufacturing Of Fpds By Casting With 3d Printed Patternsmentioning

confidence: 75%

“…On the other hand, our previous study showed that the adhesion strength of the porcelain coating to dental alloys, cast with 3D printed patterns, was higher than that of the conventionally cast using wax models: 63.4 MPa-84.6 MPa and 67.5 MPa respectively [16,17]. Optimal regimes for 3D printing of cast patterns were obtained when using the layer thickness of 50 lm, recommended by the manufacturer.…”

Section: Specifics Of the 3d Printing Processmentioning

confidence: 89%

“…Decreasing the thickness of the 3D printing layer results in reduced surface roughness. However, even after sand blasting, the traces of the layers of the 3D printed pattern can be observed on the surface of the casting [1,[15][16][17]. Therefore, for production of precise castings with high smoothness, it is necessary to use cast patterns, manufactured by stereolithography or multi-jet modelling processes with the possible minimum layer thickness.…”

Section: Introductionmentioning

confidence: 99%

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Specifics in Production of Fixed Partial Dentures Using 3D Printed Cast Patterns

Dikova

2019

Computational and Experimental Approaches in Materials Science and Engineering

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Present paper deals with the specifics in production of fixed partial dentures (FPD) using 3D printed cast patterns. The cast patterns of four-part dental bridges were manufactured of polymer NextDent Cast using RapidShape D30 printer. Two cases of application of cast patterns were discussedfor production of press-ceramic and metallic constructions. The metallic samples were cast by centrifugal casting of Co-Cr and Ni-Cr dental alloys using different investment materials and heating regimes of the casting mold. The dimensions of polymeric cast patterns and cast bridges were measured. It was established that for production of FPD with high accuracy and high adhesion of porcelain coating, precise cast patterns should be manufactured by 3D printing. The dimensions of virtual model should be corrected with coefficients, specific for each axis. The increased roughness of 3D printed cast patterns is disadvantage in dental constructions with high smoothness requirements and advantage for metal-ceramic FPD. Therefore, the position of patterns with respect to the building direction should be different for FPD of press-ceramics and cast infrastructures for metal-ceramics. In the first, vertical axes of teeth must be parallel to the print direction Z-axis, and in the second, they have to be at an angle between 45°-70°to the base. For ensuring high adhesion strength of porcelain coating in metal-ceramic restorations, surface smoothing operations should not be applied to 3D printed cast patterns. The revealed specifics would be very useful in dental practice for manufacturing of accurate FPD using 3D printed cast patterns.

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Section: Specifics In Manufacturing Of Fpds By Casting With 3d Printed Patternsmentioning

confidence: 75%

Section: Specifics Of the 3d Printing Processmentioning

confidence: 89%