Page 130 - MSAM-4-2

Materials Science in Additive Manufacturing Mouthguards: Disinfection versus properties changes

respectively. An asymmetric stretching peak at 1143 cm , assess potential chemical modifications in their structures
-1
corresponding to the C–O–C group, was also noted. 49 by these processes. The characterization was performed
Comparison with reference spectra from the literature immediately after the disinfection procedures for all three
suggests that any additives or potential contaminants materials (Figure 5).
present do not significantly alter the overall chemical When compared to the spectra of untreated (dry state)
composition of the investigated materials. specimens, the main vibrational bands corresponding to
Moreover, FTIR spectra were recorded after the
specimens underwent disinfection treatments—either A
UVC irradiation or immersion in Polident solution—to

A

B

B

C

C

Figure 4. Fourier transform infrared spectra of the studied polymeric Figure 5. Fourier transform infrared spectra of polymeric materials
filaments: (A) thermoplastic polyurethane (TPU), (B) high-impact following disinfection: UVC radiation (red) and Polident immersion
polystyrene (HIPS), and (C) poly(methyl methacrylate) (PMMA). Key (blue), for (A) thermoplastic polyurethane (TPU), (B) high-impact
functional groups are indicated in each spectrum polystyrene (HIPS), and (C) poly(methyl methacrylate) (PMMA)

Volume 4 Issue 2 (2025) 7 doi: 10.36922/MSAM025130018