Trueness and precision of the reproduction of dental casts by the conventional, milling and 3D printing techniques

Authors

  • Diogo Cabecinha Viegas Universidade de Lisboa, Faculdade de Medicina Dentária, Departamento de Prostodontia Fixa e Reabilitação Oral, Lisboa, Portugal. https://orcid.org/0000-0002-6545-7875
  • Joana Lima Hermínio Universidade de Lisboa, Faculdade de Medicina Dentária, Lisboa, Portugal.
  • João Fernandes Escola Superior de Saúde Egas Moniz, Monte da Caparica, Portugal.
  • Fernando Arrobas Universidade de Lisboa, Faculdade de Medicina Dentária, Lisboa, Portugal.
  • João Carlos Roque Universidade de Lisboa, Faculdade de Medicina Dentária, Departamento de Prostodontia Fixa e Reabilitação Oral, Lisboa, Portugal.
  • João Tiago Mourão Universidade de Lisboa, Faculdade de Medicina Dentária, Departamento de Prostodontia Fixa e Reabilitação Oral, Lisboa, Portugal.
  • Guilherme Saavedra Universidade de Lisboa, Faculdade de Medicina Dentária, Departamento de Prostodontia Fixa e Reabilitação Oral, Lisboa, Portugal.

DOI:

https://doi.org/10.4322/bds.2021.e2891

Abstract

Objective: To compare the reproduction trueness and precision of dental casts made by the conventional, milling and 3D printing techniques. Material and Methods: From an upper right side half-arch reference model (RM), 72 models were obtained and divided into three groups: conventional (CM), milled (MM) and printed (PM). All models were scanned and converted into standard tessellation language (.STL) files. The files were superimposed using 3D analysis software, and statistical analysis was performed using the root mean square (RMS) values obtained. The Shapiro-Wilk test was used to assess normality, and the Kruskal-Wallis test was used to compare groups (p < 0.05). The Mann-Whitney U test was used for multiple comparisons among groups (p < 0.017). Results: There were significant differences in trueness (p = 0.000; p <0.001) and precision (p = 0.000; p < 0.001) among the three dental cast groups. Regarding trueness, CM presented better results, followed by MM and PM. Regarding precision, MM showed better results, followed by PM and CM, which did not show significant differences. Conclusions: For dental cast reproduction the conventional technique has the best trueness and the milling technique has the best precision.

KEYWORDS

Trueness; Precision; Milling; 3D printing; Dental cast.

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Author Biography

Diogo Cabecinha Viegas, Universidade de Lisboa, Faculdade de Medicina Dentária, Departamento de Prostodontia Fixa e Reabilitação Oral, Lisboa, Portugal.

Assistant Professor Fixed Prosthodontics

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Published

2021-12-17

How to Cite

1.
Viegas DC, Lima Hermínio J, Fernandes J, Arrobas F, Roque JC, Mourão JT, et al. Trueness and precision of the reproduction of dental casts by the conventional, milling and 3D printing techniques. BDS [Internet]. 2021 Dec. 17 [cited 2025 Aug. 21];24(4 Suppl). Available from: https://ojs.ict.unesp.br/index.php/cob/article/view/2891

Issue

Vol. 24 No. 4 Suppl (2021): Oct - Dec / 2021 SUPPL

Section

Clinical or Laboratorial Research

License

Brazilian Dental Science uses the Creative Commons (CC-BY 4.0) license, thus preserving the integrity of articles in an open access environment. The journal allows the author to retain publishing rights without restrictions.

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