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Revista Facultad de Odontología Universidad de Antioquia

Print version ISSN 0121-246X


VASQUEZ-NINO, Andrés Felipe; OCHOA-ALZATE, José Rodolfo; OSORIO-AMARILES, Daniel  and  RODRIGUEZ-QUIROS, Henry Alberto. Denture base polymers for analog and digital manufacturing: comparative study of the flexural strength, elastic modulus, and compressive strength of their mechanical properties. Rev Fac Odontol Univ Antioq [online]. 2021, vol.33, n.1, pp.6-16.  Epub Aug 30, 2021. ISSN 0121-246X.


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.


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.


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.


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.

Keywords : dental materials; acrylic resins; denture bases; 3d printing; CAD-CAM.

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