A1 Refereed original research article in a scientific journal
Effect of Surface Polishing on Physical Properties of an Occlusal Splint Material for Additive Manufacturing under Protection Gas Post-Curing Condition
Authors: Wada Junichiro, Wada Kanae, Gibreel Mona, Wakabayashi Noriyuki, Iwamoto Tsutomu, Vallittu Pekka K, Lassila Lippo
Publisher: MDPI
Publication year: 2023
Journal: Polymers
Journal name in source: POLYMERS
Journal acronym: POLYMERS-BASEL
Article number: 625
Volume: 15
Issue: 3
Number of pages: 11
DOI: https://doi.org/10.3390/polym15030625
Self-archived copy’s web address: https://research.utu.fi/converis/portal/detail/Publication/178965341
The aim of this study was to evaluate the effect of surface polishing as well as the post-curing atmospheres (air and nitrogen gas) on the physical properties of an occlusal splint material for additive manufacturing. Flexural strength, flexural modulus, Vickers hardness number (VHN), degree of carbon double bond conversion (DC), water sorption (W-SP), and water solubility (W-SL) were evaluated. Surface polishing significantly affected the evaluated properties. Regardless of the post-curing atmosphere, flexural strength, flexural modulus, VHN, and DC showed significantly higher values for the polished specimens when compared with the unpolished ones, while W-SP and W-SL were significantly lower for the polished specimens. Unpolished specimens post-cured at nitrogen gas showed significantly higher VHN and DC values. However, the effect of the post-curing at a nitrogen gas atmosphere was non-significant in polished specimens. The current results suggested that surface polishing plays a role in the physical properties of the evaluated occlusal splint material and can enhance all the evaluated properties regardless of the post-curing atmosphere. Meanwhile, the post-curing at a nitrogen gas atmosphere can enhance the VHN and DC but its effect is confined only to the surface layers, which can be removed during surface polishing.
Downloadable publication This is an electronic reprint of the original article. |  |
