[PPS-P-3] Comparison of flexural strength in two 3D printed denture base resins with different thicknesses: An in vitro study
[Abstract]
Objective
To assess the flexural strength of two 3D- printed denture base resins printed in different thicknesses compare with heat-cured Polymethyl methacrylate denture resin
Method
A total of 90 rectangular specimens (65mm × 10mm) were made. the specimens were divided into three groups with 30 specimens each; NextDent Denture 3D+ (ND), DENTCA Denture Base II (DC), and heat-curing Polymethyl methacrylate denture base resin (PMMA), each group further subdivided to 3 subgroups (n=10) according to thickness (2.5mm, 3.0mm, or 3.5mm). The specimens were loaded until failure on a three-point bending universal testing machine. The collected data were subsequently analysed using descriptive analysis to check for data normality and one-way analysis of variance, to determine statistical differences with a significance level established at p=0.05.
[Results and Discussion]
Results:The DENTCA (3.5mm) specimens demonstrated the highest flexural strength (110.13 ± 6.85 MPa) compared to the other specimens tested. Within the DENTCA group, significant differences in flexural strength of 3.5 mm specimens observed compared to 2.5mm and 3.0mm specimens (p < .05). There was a significant difference in flexural strength in 2.5mm and 3.5mm thickness levels among all groups.
Conclusion: Within the limitations of the study, both material type and thickness influenced the flexural strength of 3D-printed denture base resins, the 3D-printed resin (DENTCA) showed the highest flexural strength value followed by PMMA, and least strength was observed in the 3D-prented resin (NextDent). The flexural strength in 3D-printed resins exceeded the standards ISO 20795-1:2013
[References][newline]
1) Alaseef, N., S. Albasarah, et al. 2022. CAD-CAM Fabricated Denture Base Resins: In Vitro Investigation of the Minimum Acceptable Denture Base Thickness', J Prosthodontocs 2022; 31
2) Falahchai, M., M. Ghavami-Lahiji, et all. Comparison of mechanical properties, surface roughness, and color stability of 3D-printed and conventional heat-polymerizing denture base materials . J Prosthet Den 2023; 130
3) Fiore, A. D., R. Meneghello, et all. Comparison of the flexural and surface properties of milled, 3D-printed, and heat polymerized PMMA resins for denture bases: An in vitro study. J Prosthodont Res 2022; 66
Objective
To assess the flexural strength of two 3D- printed denture base resins printed in different thicknesses compare with heat-cured Polymethyl methacrylate denture resin
Method
A total of 90 rectangular specimens (65mm × 10mm) were made. the specimens were divided into three groups with 30 specimens each; NextDent Denture 3D+ (ND), DENTCA Denture Base II (DC), and heat-curing Polymethyl methacrylate denture base resin (PMMA), each group further subdivided to 3 subgroups (n=10) according to thickness (2.5mm, 3.0mm, or 3.5mm). The specimens were loaded until failure on a three-point bending universal testing machine. The collected data were subsequently analysed using descriptive analysis to check for data normality and one-way analysis of variance, to determine statistical differences with a significance level established at p=0.05.
[Results and Discussion]
Results:The DENTCA (3.5mm) specimens demonstrated the highest flexural strength (110.13 ± 6.85 MPa) compared to the other specimens tested. Within the DENTCA group, significant differences in flexural strength of 3.5 mm specimens observed compared to 2.5mm and 3.0mm specimens (p < .05). There was a significant difference in flexural strength in 2.5mm and 3.5mm thickness levels among all groups.
Conclusion: Within the limitations of the study, both material type and thickness influenced the flexural strength of 3D-printed denture base resins, the 3D-printed resin (DENTCA) showed the highest flexural strength value followed by PMMA, and least strength was observed in the 3D-prented resin (NextDent). The flexural strength in 3D-printed resins exceeded the standards ISO 20795-1:2013
[References][newline]
1) Alaseef, N., S. Albasarah, et al. 2022. CAD-CAM Fabricated Denture Base Resins: In Vitro Investigation of the Minimum Acceptable Denture Base Thickness', J Prosthodontocs 2022; 31
2) Falahchai, M., M. Ghavami-Lahiji, et all. Comparison of mechanical properties, surface roughness, and color stability of 3D-printed and conventional heat-polymerizing denture base materials . J Prosthet Den 2023; 130
3) Fiore, A. D., R. Meneghello, et all. Comparison of the flexural and surface properties of milled, 3D-printed, and heat polymerized PMMA resins for denture bases: An in vitro study. J Prosthodont Res 2022; 66