Evaluation of Mechanical and Biological Properties of Heat-Cured Denture Base Fabricated with Recycled PMMA Powder


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Nadia Halib
Zulfahmi Said
Muhamad Azfar Fathi Sa’adon
Nur Aina Aqilah Mohd Sabri

Abstract

Background: Heat-cure polymethylmethacrylate (PMMA) is widely used in dentistry as a denture base material and for training students in fabricating acrylic-based dental appliances. These appliances are typically discarded after training, leading to significant acrylic waste.


Aim: To recycle discarded denture base materials to produce recycled PMMA powder for use in denture base fabrication.


Materials and Methods: The recycled PMMA (rPMMA) powder was produced by grinding the used denture base into the desired particle and later incorporated in different concentrations, 20% and 50%, into the commercial PMMA for denture base fabrication. The mechanical and biological properties of the PMMA modified with rPMMA were investigated. The unmodified denture base fabricated with 100% commercial PMMA powder served as a control group.


Results: The incorporation of 50% rPMMA powder into the PMMA denture base showed slightly more flexural strength (125.80 ± 17.53 MPa) compared to the 20% modified and the control groups. No significant change in the hardness was observed among the groups. Less colony-forming units were observed in the 20% rPMMA modified group (186.33) compared to the other groups.


Conclusion: Denture base materials modified with recycled PMMA (rPMMA) exhibited acceptable mechanical properties and a reduced colony-forming unit (CFU) count compared to unmodified materials.

Article Details


How to Cite
Halib, N., Said, Z., Sa’adon , M. A. F., & Mohd Sabri , N. A. A. (2025). Evaluation of Mechanical and Biological Properties of Heat-Cured Denture Base Fabricated with Recycled PMMA Powder. International Journal of Dental Materials, 7(1), 6–11. https://doi.org/10.37983/IJDM.2025.7102
Author Biographies

Nadia Halib, Universiti Sains Islam Malaysia

Department of Basic Sciences, Faculty of Dentistry, Universiti Sains Islam Malaysia, Kuala Lumpur, Malaysia.

Zulfahmi Said, Universiti Sains Islam Malaysia

Department of Basic Sciences, Faculty of Dentistry, Universiti Sains Islam Malaysia, Kuala Lumpur, Malaysia

Muhamad Azfar Fathi Sa’adon , Universiti Sains Islam Malaysia

Faculty of Dentistry, Universiti Sains Islam Malaysia, Kuala Lumpur, Malaysia.

Nur Aina Aqilah Mohd Sabri , Universiti Sains Islam Malaysia

Faculty of Dentistry, Universiti Sains Islam Malaysia, Kuala Lumpur, Malaysia.