Work

Assessing impact of titanium dioxide nanotube incorporation on the glass transition temperature and thermal stability of 3D printed complete denture base resin

Year: 2026

Type: article

Abstract: STATEMENT OF PROBLEM: ) nanotubes (NTs) into 3D printed denture base resins improves their properties is unknown. PURPOSE: NTs into 3D printed denture base resin on the glass transition temperature (Tg), thermal stability, and a thermomechanical property (elastic modulus [EM]) as a function of temperature change. MATERIAL AND METHODS: NTs (Ø30 to 85 nm×1 to 3 µm) were added to the denture base resin at 0.0 wt% (control), 1.0 wt%, and 2.0 wt%. The Tgs were analyzed using 3 different methods: differential scanning colorimetry (DSC), differential thermal analysis (DTA), and thermomechanical analysis (TMA). Thermal stability was analyzed using thermogravimetric analysis (TGA) and its derivative (DTG). EMs were evaluated using a TMA device. A total of 96 specimens were used during the experiments, including 30 specimens for each test (thermal stability, Tg, and EM), in each subgroup (n=10) and 6 specimens for microscope and composition analyses (n=2). The effective sample size was calculated using G*power 3.1.9.7, and the collected data were analyzed using ANOVA for Tg and repeated-measures ANOVA for thermal stability and EM followed by the Tukey post hoc test (α=.05). RESULTS: NTs concentration improved the thermal stability (TGA and DTG) (P<.001) and EM (P<.001) of both the 1.0 wt% and 2.0 wt% nanocomposite groups. The Tg increased significantly in the 1.0 wt% nanocomposite group (P<.001). Additionally, among the 3 different methods for Tg analysis, no significant differences were found (P=.955). CONCLUSIONS: The glass transition temperature, EM, and thermal stability of 3D printed materials improved in the 1.0 wt% group. Additionally, both DSC and DTA were found to be reliable analytic methods for Tg analysis, as they conform with the Tg results from the TMA devices.

Source: Journal of Prosthetic Dentistry

DOI: 10.1016/j.prosdent.2026.01.009

Authors: Zaid Basil Al-enbary, Ihab Nabeel Safi, Julfikar Haider

Institutions: University of Baghdad, Mustansiriyah University, Manchester Metropolitan University

Language: English

Topic: Dental materials and restorations

Subfield: Orthodontics

Field: Dentistry

Domain: Health Sciences

SDG: Good health and well-being

Open Access status: hybrid

Estimated APC paid: $3,900