Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2022 Jan 29;12(1):126-131.
doi: 10.4103/jispcd.JISPCD_293_21. eCollection 2022 Jan-Feb.

In-vitro Comparative Evaluation for the Surface Properties and Impact Strength of CAD/CAM Milled, 3D Printed, and Polyamide Denture Base Resins

Mohamed A Helal  1 , Ahmed Fadl-Alah  2 , Yasser M Baraka  2 , Mohammed M Gad  3 , Abdel-Naser M Emam  1
Affiliations

In-vitro Comparative Evaluation for the Surface Properties and Impact Strength of CAD/CAM Milled, 3D Printed, and Polyamide Denture Base Resins

Mohamed A Helal et al. J Int Soc Prev Community Dent. .

Abstract

Objective: There is a paucity of data regarding the effect of fabrication techniques and compositions of CAD/CAM milled, 3D-printed, and polyamide flexible denture base resin materials (DBRMs) on the surface roughness (SR), surface hardness (SH), and impact strength (IS). Therefore, this study aimed to evaluate the SR, SH, and IS of CAD/CAM milled, 3D-printed, and polyamide flexible DBRMs.

Materials and methods: Ninety specimens were constructed from different DBRMs and divided into three groups (CAD/CAM, 3D-printed, and polyamide DBRMs; n = 30) with specific measurements: 15 × 10 × 2.5 mm for SR and H tests and 80 × 10 × 4 mm notched specimen for IS test. SR meter and Vickers micro SH tester were used to measure SR and SH, respectively, whereas the IS was evaluated using Charpy's impact testing machine. Data were collected and statistically analyzed using one-way analysis of variance and post hoc Tukey's tests (α=0.05).

Results: There were significant differences between the tested materials (P< 0.05). The CAD/CAM milled showed lowest SR when compared with 3D-printed resin and polyamide flexible resin (P< 0.05); however, there was a significant increase in SH of CAD/CAM milled and 3D-printed DBRMs when compared with polyamide materials (P< 0.05). There was a significant increase in IS of polyamide and CAD/CAM milled resins when compared with 3D-printed DBRMs (P < 0.05).

Conclusion: CAD/CAM milled resins showed high IS and SH with lower SR.

Keywords: 3D printing; CAD/CAM; flexible resin; hardness; impact strength; surface roughness.

PubMed Disclaimer

Conflict of interest statement

None.

Similar articles

See all similar articles

Cited by

See all "Cited by" articles

References

    1. Isik G, Harrison A. Effect of deep-freezing on some properties of acrylic resin. Acta Odontol Scand. 2005;63:158–62. - PubMed
    1. Soygun K, Bolayir G, Boztug A. Mechanical and thermal properties of polyamide versus reinforced PMMA denture base materials. J Adv Prosthodont. 2013;5:153–60. - PMC - PubMed
    1. Lee J, Belles D, Gonzalez M, Kiat-Amnuay S, Dugarte A, Ontiveros J. Impact strength of 3D printed and conventional heat-cured and cold-cured denture base acrylics. Int J Prosthodont. 2022 - PubMed
    1. Bilgin MS, Baytaroğlu EN, Erdem A, Dilber E. A review of computer-aided design/computer-aided manufacture techniques for removable denture fabrication. Eur J Dent. 2016;10:286–91. - PMC - PubMed
    1. Bidra AS, Taylor TD, Agar JR. Computer-aided technology for fabricating complete dentures: Systematic review of historical background, current status, and future perspectives. J Prosthet Dent. 2013;109:361–6. - PubMed