IADR Abstract Archives
Evaluation of Physical Properties of New Polymer for 3D Printer
Objectives: The purpose of this study was to assess the physical properties of a new elastomeric material applicable for dental 3D printer
Methods: Three thermoplastic filaments: acrylonitrile butadiene styrene (ABS), poly-lactic acid (PLA) (Mutoh Engineering, Japan) and acrylic block copolymer (Kurarity-LM730H, Kuraray, Japan) and a dental self-curing resin (PMMA, Unifast 3, GC) were used in this study. A fused deposition modeling 3D printer (Value Max MF-1000?, Mutoh Engineering) was used to fabricate the thermoplastic specimens. The physical properties: water sorption (WS), dimensional accuracy (DA), and shear bond strength (SBS); were evaluated for each material. For WS, the specimens (d=50mm, h=1mm) were measured by weight after desiccation and immersion in deionized water for 1 day, 1 week and 1 month. For DA, deformation of the specimens (d=10mm inside, 15mm outside, h=10mm) was measured after desiccation and immersion in distilled water for 1day, 1week and 1 month. For SBS, the specimens (d=20mm, h=10mm) were ground with #600 grit-SiC and then PMMA was filled in a teflon ring (d=3mm, h=4mm). The specimens were stored in water for 24 hours and thermocycling for 0 and 10,000 cycles. The Data were analyzed by Repeated measures ANOVA and t-test with Bonferroni correction at 95 % confidence level (n=15).
Results: The WS value of PMMA was significantly higher than those of the other materials after 1 day, while Kurarity demonstrated significantly higher WS values than the other materials after 1 week and 1 month (p<0.05). The DA values were influenced by water storage periods except for Kurarity. There were no significant differences in SBS among ABS, PLA and PMMA (p>0.05), while the SBS of Kurarity was the lowest among the materials.
Conclusions: The acrylic block copolymer demonstrated the unique physical properties, suggesting the potential to apply for a dental 3D printer.
Methods: Three thermoplastic filaments: acrylonitrile butadiene styrene (ABS), poly-lactic acid (PLA) (Mutoh Engineering, Japan) and acrylic block copolymer (Kurarity-LM730H, Kuraray, Japan) and a dental self-curing resin (PMMA, Unifast 3, GC) were used in this study. A fused deposition modeling 3D printer (Value Max MF-1000?, Mutoh Engineering) was used to fabricate the thermoplastic specimens. The physical properties: water sorption (WS), dimensional accuracy (DA), and shear bond strength (SBS); were evaluated for each material. For WS, the specimens (d=50mm, h=1mm) were measured by weight after desiccation and immersion in deionized water for 1 day, 1 week and 1 month. For DA, deformation of the specimens (d=10mm inside, 15mm outside, h=10mm) was measured after desiccation and immersion in distilled water for 1day, 1week and 1 month. For SBS, the specimens (d=20mm, h=10mm) were ground with #600 grit-SiC and then PMMA was filled in a teflon ring (d=3mm, h=4mm). The specimens were stored in water for 24 hours and thermocycling for 0 and 10,000 cycles. The Data were analyzed by Repeated measures ANOVA and t-test with Bonferroni correction at 95 % confidence level (n=15).
Results: The WS value of PMMA was significantly higher than those of the other materials after 1 day, while Kurarity demonstrated significantly higher WS values than the other materials after 1 week and 1 month (p<0.05). The DA values were influenced by water storage periods except for Kurarity. There were no significant differences in SBS among ABS, PLA and PMMA (p>0.05), while the SBS of Kurarity was the lowest among the materials.
Conclusions: The acrylic block copolymer demonstrated the unique physical properties, suggesting the potential to apply for a dental 3D printer.