Sorption of photopolymerizable resins for 3D printers and thermosetting PMMA resins. In Vitro Study vascular malformations in children
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Abstract
Objective: To evaluate the sorption in light-curing resins for 3D printers and thermocuring PMMA resins through an in vitro study. Methodology: Experimental in vitro study, with 10 heat-curing PMMA test bodies and 10 3D printed resin test bodies. Circular stainless-steel dies of 22.1 mm external diameter, 15mm internal diameter, 1mm thickness based on ISO 4049 standards were used for their fabrication. The samples were polished and stored in plastic containers with silica gel and exposed to 37ºC for 22 hours, followed by 2 hours at 23ºC. They were weighed on an analytical balance every 24 hours. The area and volume were calculated. They were immersed in 10 ml of double distilled water in test tubes at 37ºC for 7 days. After washing and drying the samples, they were weighed again (m2). Finally, the samples were placed again in containers with silica gel at 37ºC and weighed daily until a constant mass (m3) was obtained. The results were performed in the statistical program BioStat 5.3 (Brazil) using Student’s t-test (p 0.05). Results: The results of the sorption test were obtained after a process of obtaining three different masses, where it was necessary to use both an analytical balance (Boeco-Germany) and an oven (Memmert). The results were obtained in µg/mm3. In which the 3D printed resin obtained a mean value of 46.11 µg/mm3 while the PMMA resin obtained a mean value of 22.60 µg/mm3 Conclusions: In the present study, based on the exposed experimental method, it was demonstrated that when compared between groups, the PMMA resin presented a statistically lower sorption compared to the 3D printed resin.
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