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CC BY 4.0 · Eur J Dent 2025; 19(03): 697-703
DOI: 10.1055/s-0044-1791965
Original Article

Comparison of Mechanical and Surface Properties between Conventional and CAD/CAM Provisional Restorations

Autor*innen

  • Napatsorn Wechkunanukul

    1   Faculty of Dentistry, Naresuan University, Phitsanulok, Thailand

  • Kornuma Klomjit

    1   Faculty of Dentistry, Naresuan University, Phitsanulok, Thailand

  • Thawanrat Kumtun

    1   Faculty of Dentistry, Naresuan University, Phitsanulok, Thailand

  • Pongsiri Jaikumpun

    2   Department of Restorative Dentistry, Faculty of Dentistry, Naresuan University, Phitsanulok, Thailand

  • Santiphab Kengtanyakich

    2   Department of Restorative Dentistry, Faculty of Dentistry, Naresuan University, Phitsanulok, Thailand

  • Awutsadaporn Katheng

    2   Department of Restorative Dentistry, Faculty of Dentistry, Naresuan University, Phitsanulok, Thailand

Funding This work was supported by Naresuan University (grant number R2566C001).
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Abstract

Objective This study compared the flexural strength, surface hardness, and surface roughness of conventional, milled, and three-dimensional (3D)-printed provisional restorations.

Materials and Methods Bar-shaped polymethyl methacrylate (PMMA) specimens (25 × 2 × 2 mm3) and disc-shaped specimens (9 × 2 mm2) were fabricated using three different techniques (n = 10/group): conventional (SR Ivocron C&B, Ivoclar Vivadent, Schaan, Liechtenstein), milling (Aidite Temp PMMA Blocks, Aidite, Qinhuangdao, China), and 3D printing (Asiga DentaTOOTH, Asiga, Sydney, Australia). Flexural strength was evaluated using a universal testing machine until fracture occurred. Vickers hardness and surface roughness tests were performed on the disc-shaped specimens using a micro-Vickers hardness tester and atomic force microscopy, respectively.

Statistical Analysis Data were statistically analyzed using one-way ANOVA. The post hoc Tukey's honest significant difference was conducted to compare the differences value between groups (p < 0.05).

Results The milled computer-aided design/computer-aided manufacturing (CAD/CAM) provisional restorative material exhibited a significantly higher flexural strength (125.16 ± 6.83 MPa) compared with both the traditional (109.74 ± 14.14 MPa) and 3D-printed (71.09 ± 9.09 MPa) materials (p < 0.05). The conventional material had a higher Vickers hardness (19.27 ± 0.41 kgf/mm2) compared with the milled (18.53 ± 0.32 kgf/mm2) and 3D-printed (17.80 ± 1.85 kgf/mm2) materials, though the difference was statistically significant only between the conventional and 3D-printed groups. The surface roughness of the milled CAD/CAM material (8.80 ± 2.70 nm) was significantly lower than that of the 3D-printed material (24.27 ± 9.82 nm) (p < 0.05).

Conclusion The provisional restorations fabricated using milled PMMA technology provide adequate flexural strength, surface hardness, and low surface roughness, offering a viable alternative for creating provisional restorations.

Keywords

CAD/CAM - dental prosthetics - mechanical strength - PMMA - provisional restorations


Publikationsverlauf

Artikel online veröffentlicht:
10. Dezember 2024

© 2024. 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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