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Article

Surface Characteristics of Milled and 3D Printed Denture Base Materials Following Polishing and Coating: An In-Vitro Study

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Department of Prosthodontics, University Hospital Tuebingen, Osianderstrasse 2-8, 72076 Tübingen, Germany
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Department of Prothodontics, Geriartric Dentistry and Craniomandibular Disorders, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Aßmannshauser Str. 4-6, 14197 Berlin, Germany
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Department of Dental Surgery, Sechenov First Moscow State Medical University, Trubetskaya Str. 8-2, 119991 Moscow, Russia
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Section Medical Materials Science and Technology, University Hospital Tuebingen, Osianderstrasse 2-8, 72076 Tuebingen, Germany
*
Author to whom correspondence should be addressed.
Materials 2020, 13(15), 3305; https://doi.org/10.3390/ma13153305
Received: 8 July 2020 / Revised: 21 July 2020 / Accepted: 22 July 2020 / Published: 24 July 2020
(This article belongs to the Special Issue Computer-Assisted Manufacturing for Dental Applications)
(1) Background: To date, no information on the polishability of milled and 3D-printed complete denture bases has been provided, which is relevant in terms of plaque accumulation. (2) Methods: three groups (n = 30) were manufactured using the cold-polymerization polymethilmethacrilate, milling (SM) and 3D printing (AM). 10 specimens of each group were left untreated (reference). 10 more specimens were pre-polished (intermediate polishing) and 10 final specimens were highgloss polished. An additional 20 specimens were 3D printed and coated with the liquid resin (coated), 10 of which were additionally polished (coated + polished). For each group Ra and Rz values, gloss value and REM images were obtained. (3). The “highgloss-polished” specimens showed statistically lower Ra and Rz values in the SM, followed by AM and conventional groups. In the AM group statistically lower surfaces roughness was revealed for highgloss-polished, “coated + polished”, and “coated” specimens, respectively. (4) Conclusions: The milled specimens demonstrated superiors surface characteristics than 3D printed and conventionally produced after polishing. The polished specimens demonstrated superior surface characteristics over coated specimens. However, the surface roughness by both polished and coated specimens was within the clinically relevant threshold of 0.2 µm. View Full-Text
Keywords: additive manufacturing; digital denture; full denture; edentualism; surface roughness; gloss; rapid manufacturing additive manufacturing; digital denture; full denture; edentualism; surface roughness; gloss; rapid manufacturing
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MDPI and ACS Style

Kraemer Fernandez, P.; Unkovskiy, A.; Benkendorff, V.; Klink, A.; Spintzyk, S. Surface Characteristics of Milled and 3D Printed Denture Base Materials Following Polishing and Coating: An In-Vitro Study. Materials 2020, 13, 3305. https://doi.org/10.3390/ma13153305

AMA Style

Kraemer Fernandez P, Unkovskiy A, Benkendorff V, Klink A, Spintzyk S. Surface Characteristics of Milled and 3D Printed Denture Base Materials Following Polishing and Coating: An In-Vitro Study. Materials. 2020; 13(15):3305. https://doi.org/10.3390/ma13153305

Chicago/Turabian Style

Kraemer Fernandez, Pablo, Alexey Unkovskiy, Viola Benkendorff, Andrea Klink, and Sebastian Spintzyk. 2020. "Surface Characteristics of Milled and 3D Printed Denture Base Materials Following Polishing and Coating: An In-Vitro Study" Materials 13, no. 15: 3305. https://doi.org/10.3390/ma13153305

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