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Open AccessArticle

Effects of Printing Parameters on the Fit of Implant-Supported 3D Printing Resin Prosthetics

1
Department of Prosthodontics and Dental Research Institute, Seoul National University Dental Hospital, School of Dentistry, Seoul National University, Seoul 03080, Korea
2
Department of Conservative Dentistry, School of Dentistry, Seoul National University, Seoul 03080, Korea
*
Author to whom correspondence should be addressed.
Materials 2019, 12(16), 2533; https://doi.org/10.3390/ma12162533
Received: 15 July 2019 / Revised: 2 August 2019 / Accepted: 6 August 2019 / Published: 9 August 2019
(This article belongs to the Special Issue Surface Modifications and Coatings for Bioactive Implants)
The purpose of the study was to investigate the influence of 3D printing parameters on fit and internal gap of 3D printed resin dental prosthesis. The dental model was simulated and fabricated for three-unit prostheses with two implants. One hundred prostheses were 3D printed with two-layer thicknesses for five build orientations using a resin (NextDent C&B; 3D systems, Soesterberg, The Netherlands) and ten prostheses were manufactured with a milling resin as control. The prostheses were seated and scanned with micro-CT (computerized tomography). Internal gap volume (IGV) was calculated from 3D reconstructed micro-CT data. IGV, marginal fit, and lengths of internal gaps were measured, and the values were analyzed statistically. For the 3D printed prostheses, IGV was smaller at 45°, 60°, and 90° compared to other build orientations. The marginal fit evaluated by absolute marginal discrepancy was smaller than other build orientations at 45° and 60°. IGV was smaller at 50 µm layer thickness than at 100 µm layer thickness, but the marginal fit was smaller at 100 µm layer thickness than at 50 µm layer thickness. The 3D printed prosthesis had smaller internal gap than the milled prosthesis. The marginal fit of the 3D printed resin prosthesis was clinically acceptable, and build orientation of 45° and 60° would be recommended when considering fit and internal gap. View Full-Text
Keywords: implant; prosthesis; 3D printing; fit; bioengineering implant; prosthesis; 3D printing; fit; bioengineering
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Park, G.-S.; Kim, S.-K.; Heo, S.-J.; Koak, J.-Y.; Seo, D.-G. Effects of Printing Parameters on the Fit of Implant-Supported 3D Printing Resin Prosthetics. Materials 2019, 12, 2533.

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Materials, EISSN 1996-1944, Published by MDPI AG
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