IADR Abstract Archives
Mechanical Properties of 3D-Printed Denture Base Materials Under Biomimetic Conditions
Objectives: To compare flexural strength, fracture toughness, and creep properties of four 3D-printed denture base materials under biomimetic conditions.
Methods: Four commercially available 3D-printed denture base materials, Formlabs-Denture-Base-OP, Pacdent-Denture-Base, Lucitone-Digital-Print, and DENTCA-Denture-Base-II, were used in the study.
Rectangular bar-shaped specimens were designed and printed with DLP-3D-printing machine and post-processed according to the manufacturer's instructions. Twenty-sixth specimens for each material were printed. Single-edge notched bars of 3x4x25mm3 were used for fracture toughness test(n=9); 4x8x40mm3 for three-point-bend flexural strength test(n=10), and 3x9x50mm3 for creep compliance test(n=6).
Specimens were tested at a controlled temperature 37±2°C using an environmental control chamber under an Instron-Universal-Testing-Machine. Three-point-bend was tested 1mm/min crosshead-speed and 20-mm-span until fracture. Specimens for fracture toughness were inspected under an optical-microscope for crack length and tested failure load using three-point-bend fixture with support 20-mm, crosshead-speed 0.5mm/min. Six specimens were used for creep test by loading specimens with displacement 1mm/min crosshead speed and holding 70%(20% for Lucitone) of mean failure stress 10minutes.
All values were calculated using one-way-ANOVA. The levels were compared by Tukey-KramerHSD using JMP-Pro16.2.
Results: DENTCA-Denture-Base-II and Formlabs-Denture-Base-OP showed significantly higher flexural strength than Lucitone-Digital-Print and Pacdent-Denture-Base,P<0.0001. However, Lucitone-Digital-Print had fracture toughness significantly higher than DENTCA-Denture-Base-II, Formlabs-Denture-Base-OP,and Pacdent-Denture-Base, respectively,P<0.0001. Lucitone-Digital-Print showed a significantly higher creep compliance percentage than Pacdent-Denture-Base, DENTCA-Denture-Base-II, and Formlabs-Denture-Base-OP,P<0.0001.
Conclusions: DENTCA-Denture-Base-II and Formlabs-Denture-Base-OP exhibit higher flexural strength than Lucitone-Digital-Print and Pacdent-Denture-Base.However, Lucitone-Digital-Print demonstrates superior fracture toughness compared to other materials.Regarding creep compliance, Lucitone-Digital-Print shows the highest percentage, indicating greater susceptibility to time-dependent deformation.
Methods: Four commercially available 3D-printed denture base materials, Formlabs-Denture-Base-OP, Pacdent-Denture-Base, Lucitone-Digital-Print, and DENTCA-Denture-Base-II, were used in the study.
Rectangular bar-shaped specimens were designed and printed with DLP-3D-printing machine and post-processed according to the manufacturer's instructions. Twenty-sixth specimens for each material were printed. Single-edge notched bars of 3x4x25mm3 were used for fracture toughness test(n=9); 4x8x40mm3 for three-point-bend flexural strength test(n=10), and 3x9x50mm3 for creep compliance test(n=6).
Specimens were tested at a controlled temperature 37±2°C using an environmental control chamber under an Instron-Universal-Testing-Machine. Three-point-bend was tested 1mm/min crosshead-speed and 20-mm-span until fracture. Specimens for fracture toughness were inspected under an optical-microscope for crack length and tested failure load using three-point-bend fixture with support 20-mm, crosshead-speed 0.5mm/min. Six specimens were used for creep test by loading specimens with displacement 1mm/min crosshead speed and holding 70%(20% for Lucitone) of mean failure stress 10minutes.
All values were calculated using one-way-ANOVA. The levels were compared by Tukey-KramerHSD using JMP-Pro16.2.
Results: DENTCA-Denture-Base-II and Formlabs-Denture-Base-OP showed significantly higher flexural strength than Lucitone-Digital-Print and Pacdent-Denture-Base,P<0.0001. However, Lucitone-Digital-Print had fracture toughness significantly higher than DENTCA-Denture-Base-II, Formlabs-Denture-Base-OP,and Pacdent-Denture-Base, respectively,P<0.0001. Lucitone-Digital-Print showed a significantly higher creep compliance percentage than Pacdent-Denture-Base, DENTCA-Denture-Base-II, and Formlabs-Denture-Base-OP,P<0.0001.
Conclusions: DENTCA-Denture-Base-II and Formlabs-Denture-Base-OP exhibit higher flexural strength than Lucitone-Digital-Print and Pacdent-Denture-Base.However, Lucitone-Digital-Print demonstrates superior fracture toughness compared to other materials.Regarding creep compliance, Lucitone-Digital-Print shows the highest percentage, indicating greater susceptibility to time-dependent deformation.