|About this Abstract
||Materials Science & Technology 2019
||Late News Poster Session
||P1-18: Bond Strength of Denture Teeth to Heat-cured, CAD-CAM and 3D Printed Denture Acrylics
||Joanne Jung Eun Choi, Caira Ellyse Uy, Polina Plaksina, Rishi Ramani, Ritu Ganjigatti, Neil Waddell
|On-Site Speaker (Planned)
||Joanne Jung Eun Choi
Objectives: To establish the fracture toughness (K1C) and bond strength of denture teeth to heat-cured, CAD-CAM and 3D printed denture-based resins (DBRs).
Methods: Three types of DBRs and four different types of commercial denture teeth were investigated. The testing ends of all the specimens (DBR and denture teeth) were bonded according to manufacturer’s instructions. Specimens were thermocycled to simulate aging intraorally. A 4-point bend test was done to calculate K1C (MPa·m1/2) and flexure bond strength (MPa). All specimens were analysed under scanning electron microscope. Results were statistically analysed using ANOVA(SPSS).
Results: The mean K1C was highest for the teeth bonded to the heat-cured DBR group(1.09±0.24),followed by CAD-CAM(0.43±0.05) and 3D printed groups(0.17±0.01). Differences were statistically significant(P<0.01). Aging showed significantly lower values but no statistical significance(P=0.36).
Conclusion: Teeth bonded to heat-cured DBRs produced the highest K1C. Teeth bonded to CAD-CAM and 3D printed DBRs showed significantly lower bond strength.