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Antibacterial Enhancement of 3D Printed Dental Resin Photopolymer Using Titanium Dioxide Nanoparticles

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Abstract:

This study aims to evaluate the antibacterial properties of dental resin photopolymer (DRP) specimens modified with additive titanium dioxide (TiO2) nanoparticles using stereolithography 3D printing technology. TiO2 known for its excellent biocompatibility, making it a promising additive for enhancing bacterial resistance. Specimens were fabricated with varying compositions of TiO2 and characterized for surface morphology using Scanning Electron Microscopy (SEM). Antibacterial activity was assessed against Staphylococcus aureus (Gram-positive) and Escherichia coli (Gram-negative) using Kirby-Bauer disc diffusion method. SEM analysis revealed that TiO2 particles were relatively well-dispersed on the matrix surface. Antibacterial testing showed the formation of inhibition zones, particularly in sample with composition 5%wt TiO2, indicating increasing antibacterial performance. The activity was more pronounced against S. aureus, attributed to its less complex cell wall structure and more susceptible to reactive oxygen species (ROS) generated by TiO2 photocatalytic conditions. These findings suggest that TiO2-modified DRP has strong potential as an antimicrobial dental restorative material fabricated through SLA-based 3D printing.

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Periodical:

Materials Science Forum (Volume 1189)

Pages:

53-59

DOI:

https://doi.org/10.4028/p-f94aZE

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Online since:

May 2026

Authors:

Rohmadi Rohmadi*, Widyanita Harwijayanti, Kuncoro Diharjo, Ubaidillah Ubaidillah, Joko Triyono

Keywords:

3D-Printing, Antibacterial, Resin Dental, Stereolithography, Titanium Dioxide

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© 2026 Trans Tech Publications Ltd. All Rights Reserved

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