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Open Access
CC BY 4.0 · European Journal of General Dentistry 2023; 12(01): 034-041
DOI: 10.1055/s-0043-1764478
Original Article

Effect of Horizontal Resolution of Printer on Trueness of 3D-Printed Provisional Crown: An In Vitro Study

Authors

  • Pham Nhu Hai

    1   Department of Odonto Stomatology, VNU Hanoi-University of Medicine and Pharmacy, Hanoi, Vietnam

  • Tong Minh Son

    2   School of Dentistry, Hanoi Medical University, Hanoi, Vietnam

  • Nguyen Viet Anh 

    3   Viet Anh Orthodontic Clinic, Hanoi, Vietnam

  • Vo Truong Nhu Ngoc 

    2   School of Dentistry, Hanoi Medical University, Hanoi, Vietnam

  • Nguyen Thu Tra 

    2   School of Dentistry, Hanoi Medical University, Hanoi, Vietnam

Funding None.
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Abstract

Objectives Provisional crowns play an integral role in prosthodontic therapy and need to be fabricated with high accuracy to ensure good marginal fit and proper contour. The aim of this study is to evaluate the effect of 3D printer's horizontal pixel resolution on trueness of the intaglio surface, external surface, and marginal area and the actual marginal adaptation of the interim crowns.

Materials and Methods A gypsum reference model of mandible with a prepared right first molar was scanned with a dental laboratory scanner (AutoScan-DS-MIX, Shining 3D) and a digital provisional crown was design using the computer-aided design (CAD) software (Exocad). The provisional crown was manufactured by two printers with different horizontal resolutions (Sonic Mini 4K Printer and Sonic Mini 8K Printer). The printed crowns were scanned using the aforementioned scanner. The trueness of the external surface, internal surface, and marginal area of the provisional crowns was evaluated by comparing the scanned data with the reference CAD design data using a 3D inspection software (Geomagic Control X, 3D systems). The trueness of the crown manufactured by two printers was compared by a two-sided test (α = 0.05). Finally, the marginal adaptation of the provisional crowns was evaluated on the printed removable dies and compared.

Results The results revealed that there was a significant difference in the trueness of the marginal area and the marginal adaptation (p < 0.05).

Conclusions It can be concluded that the trueness of provisional crown marginal area and the marginal adaptation was affected by the horizontal resolution of the 3D printer.

Keywords

provisional crown - horizontal resolution - trueness - 3D printer - interim crown - marginal area

Note

The manuscript has been read and approved by all the authors. The data presented in this study are available on request from Dr. Nguyen Viet Anh at bsvietanhniengrang@gmail.com.




Publication History

Article published online:
30 March 2023

© 2023. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution License, permitting unrestricted use, distribution, and reproduction so long as the original work is properly cited. (https://creativecommons.org/licenses/by/4.0/)

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