Mechanical Properties of Novel 3D Printed Crown Materials
Abstract
The purpose of this study was to compare the mechanical properties of 3D-printed provisional and permanent crown materials to established materials on the market. Provisional materials: VareoSmile Temp (Bego) distributed as Temporary Crown and Bridge Resin and printed with Form 3B (Formlabs), Integrity (Dentsply Sirona) hand-fabricated using a stainless-steel mold, and Telio CAD (Ivoclar Vivadent) milled from discs. Permanent materials: VareoSmile Crown Plus (Bego) distributed as Permanent Crown Resin and printed with Form 3B (Formlabs) and Enamic (VITA) sectioned from discs. Thirty (2.0 x 2.0 x 25.0 mm) beams were created for each group. After polishing, each specimen underwent 3-point bend testing using a universal testing machine. Flexural strength and flexural modulus were determined with 15 specimens per group. Flexural fatigue strength, Weibull modulus, and characteristic strength were determined with the remaining 15 specimens using the staircase method (100,000 cycles/20 Hz). Nanoindentation hardness and modulus were tested using nanoindentation with the fragmented specimens from the flexural strength test (n=5). Data were analyzed with one-way ANOVAs and Tukeys post hoc tests (=0.05). Significant differences were found between the groups per property (p<0.05). Enamic had significantly greater flexural modulus and nanoindentation hardness/modulus than all other materials. Temporary Crown and Bridge Resin had the greatest characteristic strength, while Telio CAD had the greatest Weibull modulus. Integrity had the lowest flexural strength, Weibull modulus, and characteristic strength compared to all other materials. Telio CAD had the greatest flexural fatigue strength, but it was not significantly different from Temporary Crown and Bridge Resin and Permanent Crown Resin. In general, the novel 3D-printed crown materials performed similarly to each other, but their properties varied from the other materials based on the type of test.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 22, 2023
- Accession Number
- AD1222378
Entities
People
- Alexandra D. Okai
- Christopher Raimondi
- Kraig Vandewalle
- Wen Lien