Research articles
ScienceAsia 51 (2023): 1-9 |doi:
10.2306/scienceasia1513-1874.2023.082
Comparative study on the flexural properties and hardness of
a PMMA-based dental composite
Sitthi Duangpheta,b,*, Uraiwan Intathaa,b, Nattakan Soykeabkaewa,b, Kitiphong Khongphinitbunjonga,c
ABSTRACT: This work investigates the flexural properties and surface hardness (SH) of poly(methyl methacrylate)
(PMMA)-based dental materials developed with urethane dimethacrylate (UDMA) as a crosslinker and zirconia
(ZrO2
) as a filler. The composites were prepared using heat-polymerizing PMMA with varying zirconia loadings
(0.25?2.50 wt%). Flexural strength (FS) and flexural modulus (FM) were determined through a three-point bending
test, while SH was measured using microhardness testing. The addition of zirconia improved FM and SH significantly
(p < 0.05) and slightly enhanced FS. Incorporating UDMA into unfilled PMMA increased the FS and SH but had
no effect on the FM. However, when both ZrO2
and UDMA were added to PMMA, their impact on the mechanical
properties varied. In terms of FS, PMMA exhibited a lower value compared to the control group. Conversely, for SH,
their combination resulted in better properties. As for the FM, the addition of ZrO2
continued to raise it, with no
influence from the presence of UDMA. These results emphasize that while ZrO2
and UDMA can independently enhance
the mechanical properties of PMMA, their combination may diminish FS. Consequently, the study recommends cautious
use of this combination in dental materials where FS is critical.
Download PDF
Downloads Views
| a |
School of Science, Mae Fah Luang University, Chiang Rai 57100 Thailand |
| b |
Center of Innovative Materials for Sustainability (iMatS), Mae Fah Luang University, Chiang Rai 57100 Thailand |
| c |
Microbial Products and Innovation research group (MP&i), Mae Fah Luang University, Chiang Rai 57100 Thailand |
* Corresponding author, E-mail: sitthi.dua@mfu.ac.th
Received 20 Dec 2024, Accepted 0 0000
|
