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Erschienen in: Clinical Oral Investigations 5/2023

18.03.2023 | Research

Flexural strength, surface roughness, micro-CT analysis, and microbiological adhesion of a 3D-printed temporary crown material

verfasst von: Anne Kaline Claudino Ribeiro, Rodrigo Falcão Carvalho Porto de Freitas, Isabelle Helena Gurgel de Carvalho, Larissa Mendonça de Miranda, Nathália Ramos da Silva, Leopoldina de Fátima Dantas de Almeida, Yu Zhang, Adriana da Fonte Porto Carreiro, Rodrigo Othávio de Assunção e Souza

Erschienen in: Clinical Oral Investigations | Ausgabe 5/2023

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Abstract

Objective

To evaluate the thermocycling effect of 3D-printed resins on flexural strength, surface roughness, microbiological adhesion, and porosity.

Materials and methods

150 bars (8 × 2 × 2 mm) and 100 blocks (8 × 8 × 2 mm) were made and divided into 5 groups, according to two factors: “material” (AR: acrylic resin, CR: composite resin, BIS: bis-acryl resin, CAD: CAD/CAM resin, and PRINT: 3D-printed resin) and “aging” (non-aged and aged – TC). Half of them were subjected to thermocycling (10,000 cycles). The bars were subjected to mini-flexural strength (σ) test (1 mm/min). All the blocks were subjected to roughness analysis (Ra/Rq/Rz). The non-aged blocks were subjected to porosity analysis (micro-CT; n = 5) and fungal adherence (n = 10). Data were statistically analyzed (one-way ANOVA, two-way ANOVA; Tukey’s test, α = 0.05).

Results

For σ, “material” and “aging” factors were statistically significant (p < 0.0001). The BIS (118.23 ± 16.26A) presented a higher σ and the PRINT group (49.87 ± 7.55E) had the lowest mean σ. All groups showed a decrease in σ after TC, except for PRINT. The CRTC showed the lowest Weibull modulus. The AR showed higher roughness than BIS. Porosity revealed that the AR (1.369%) and BIS (6.339%) presented the highest porosity, and the CAD (0.002%) had the lowest porosity. Cell adhesion was significantly different between the CR (6.81) and CAD (6.37).

Conclusion

Thermocycling reduced the flexural strength of most provisional materials, except for 3D-printed resin. However, it did not influence the surface roughness. The CR showed higher microbiological adherence than CAD group. The BIS group reached the highest porosity while the CAD group had the lowest values.

Clinical relevance

3D-printed resins are promising materials for clinical applications because they have good mechanical properties and low fungal adhesion.
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Metadaten
Titel
Flexural strength, surface roughness, micro-CT analysis, and microbiological adhesion of a 3D-printed temporary crown material
verfasst von
Anne Kaline Claudino Ribeiro
Rodrigo Falcão Carvalho Porto de Freitas
Isabelle Helena Gurgel de Carvalho
Larissa Mendonça de Miranda
Nathália Ramos da Silva
Leopoldina de Fátima Dantas de Almeida
Yu Zhang
Adriana da Fonte Porto Carreiro
Rodrigo Othávio de Assunção e Souza
Publikationsdatum
18.03.2023
Verlag
Springer Berlin Heidelberg
Erschienen in
Clinical Oral Investigations / Ausgabe 5/2023
Print ISSN: 1432-6981
Elektronische ISSN: 1436-3771
DOI
https://doi.org/10.1007/s00784-023-04941-3

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