Denture base polymers for analog and digital manufacturing: comparative study of the flexural strength, elastic modulus, and compressive strength of their mechanical properties

Authors

DOI:

https://doi.org/10.17533/udea.rfo.v33n1a1

Keywords:

Dental materials, Acrylic resins, Denture bases, 3D printing, Cad-cam

Abstract


Introduction: the emerging manufacture technologies for dental restorations have brought new materials with them, such as 3D-printing resins and CAD/CAM discs for the manufacturing of denture bases. Currently, there is no rigorous mechanical characterization for these materials in the literature, apart from the ones reported in technical datasheets. Method: samples for mechanical characterization were manufactured with a conventional heat cure acrylic, a CAD/CAM polymethyl methacrylate (PMMA) disc and two 3D-printing resins. The samples were tested in a universal testing machine, according to ISO 20795-1 for flexural strength and elastic modulus. Compression strength was also determined under dry conditions. The average value of each property was calculated (n = 5). One-way ANOVA and Tukey’s multiple comparisons tests were used. Results: mean flexural strengths ranged from 78.35±2.99 to 87.48±4.47MPa, elastic moduli were between 2125.43±57.05 and 2277.72±58.46MPa, and compression strengths values ranged from 85.03±2.14 to 119.15±2.87MPa. Statistical analyses showed significant differences for flexural and compression strengths but did not show any difference for elastic moduli. Conclusions: all the tested materials met the minimum required specification for mechanical properties given by ISO 20795-1. From a mechanical point of view, the new materials for digital technologies, i.e., CAD/CAM disc and 3D-printing resins, are suitable for denture-base applications.

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Author Biographies

Andrés Felipe Vásquez-Niño, New Stetic S.A.

MSc in Mining, Materials, And Metallurgical Engineering, Federal University of Rio Grande do Sul. New Stetic Research Group (GINEWS)

José Rodolfo Ochoa-Alzate, New Stetic S.A.

Applied Industrial Chemistry Technologist, National Learning Service (SENA). New Stetic Research Group (GINEWS)

Daniel Osorio-Amariles, New Stetic S.A.

Pharmaceutical Chemistry Professional, Universidad de Antioquia. New Stetic Research Group (GINEWS).

Henry Alberto Rodríguez-Quirós, New Stetic S.A.

PhD in Chemical Sciences, University of Antioquia. New Stetic Research Group (GINEWS)
       

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Published

2021-02-01

How to Cite

Vásquez-Niño, A. F., Ochoa-Alzate, J. R., Osorio-Amariles, D., & Rodríguez-Quirós, H. A. (2021). Denture base polymers for analog and digital manufacturing: comparative study of the flexural strength, elastic modulus, and compressive strength of their mechanical properties. Revista Facultad De Odontología Universidad De Antioquia, 33(1), 6–16. https://doi.org/10.17533/udea.rfo.v33n1a1