Refereed journal article or data article (A1)

3D-Printed vs. Heat-Polymerizing and Autopolymerizing Denture Base Acrylic Resins




List of Authors: Perea-Lowery Leila, Gibreel Mona, Vallittu Pekka K, Lassila Lippo V

Publisher: MDPI

Publication year: 2021

Journal: Materials

Journal name in source: MATERIALS

Journal acronym: MATERIALS

Volume number: 14

Issue number: 19

Number of pages: 11

eISSN: 1996-1944

DOI: http://dx.doi.org/10.3390/ma14195781

URL: https://www.mdpi.com/1996-1944/14/19/5781

Self-archived copy’s web address: https://research.utu.fi/converis/portal/detail/Publication/67622068


Abstract

The aim of this work was to investigate the effect of two post-curing methods on the mechanical properties of a 3D-printed denture base material. Additionally, to compare the mechanical properties of that 3D-printed material with those of conventional autopolymerizing and a heat-cured denture base material. A resin for 3D-printing denture base (Imprimo®), a heat-polymerizing acrylic resin (Paladon® 65), and an autopolymerizing acrylic resin (Palapress®) were investigated. Flexural strength, elastic modulus, fracture toughness, work of fracture, water sorption, and water solubility were evaluated. The 3D-printed test specimens were post-cured using two different units (Imprimo Cure® and Form Cure®). The tests were carried out after both dry and 30 days water storage. Data were collected and statistically analyzed. Resin type had a significant effect on the flexural strength, elastic modulus, fracture toughness, and work of fracture (p < 0.001). The flexural strength and elastic modulus for the heat-cured polymer were significantly the highest among all investigated groups regardless of the storage condition (p < 0.001). The fracture toughness and work of fracture of the 3D-printed material were significantly the lowest (p < 0.001). The heat-cured polymer had the lowest significant water solubility (p < 0.001). The post-curing method had an impact on the flexural strength of the investigated 3D-printed denture base material. The flexural strength, elastic modulus, fracture toughness, work of fracture of the 3D-printed material were inferior to those of the heat-cured one. Increased post-curing temperature may enhance the flexural properties of resin monomers used for 3D-printing dental appliances.


Downloadable publication

This is an electronic reprint of the original article.
This reprint may differ from the original in pagination and typographic detail. Please cite the original version.




Last updated on 2022-06-07 at 08:58