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2025 ; 25
(1
): 1663
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The effect of post-processing washing time on the physical and chemical
properties of 3D printable resin materials
#MMPMID41131539
Batmaz SG
; Süsgün Y?ld?r?m Z
; Uçar Y
BMC Oral Health
2025[Oct]; 25
(1
): 1663
PMID41131539
show ga
PURPOSE: This study aimed to evaluate the effects of post-processing washing time
on the mechanical properties (flexural strength, Vickers hardness) and chemical
properties (water sorption, water solubility, degree of conversion, and elution
of residual monomers) of different 3D printable resin materials. MATERIALS AND
METHODS: Two different 3D printable resin materials were used: Formlabs 3D
Permanent Crown (F) and Saremco Print Crowntech (S). Washing procedures were
applied to the control groups according to each manufacturer's instructions and
to the experimental groups with increasing washing times (T(1)?=?2?×?3 min,
T(2)?=?2?×?5 min, and T(3)?=?2?×?10 min). A total of 296 specimens were evaluated
for flexural strength (FS), Vickers hardness (VH), water sorption (Wsp), water
solubility (Wsl), degree of conversion (DC), elution of residual monomers (RM)
and scanning electron microscopy (SEM) combined with energy dispersive X-ray
spectroscopy (EDS) was used for element analysis and surface characterization.
Two-way ANOVA test was used for analyses, and Tukey test was used for post-hoc.
RESULTS: No significant differences were found in pairwise comparisons of FS
values. (p?>?0.05). VH values were significantly higher in the F resin material
than in the S resin material at all washing times (p?0.001). No significant
interaction was found between resin type and washing time (p?=?0.255), and Wsp
values were not significantly different between materials (p?=?0.639). A
significant interaction was found between resin type and washing time for Wsl
(p?0.001), indicating material-dependent effects. No significant differences in
DC values were observed between materials or washing times (p?>?0.05). Residual
monomer release was significantly influenced by both the resin type and the
washing duration, especially for BPA, TEGDMA, UDMA, and Bis-GMA (p?0.05).
CONCLUSIONS: Washing time and resin type influenced specific physical and
chemical properties of the materials. A 2?×?5 min (T(2)) washing protocol appears
optimal for the F resin material, balancing mechanical integrity with reduced
monomer release, while longer washing time for S resin material did not provide
additional benefits.