Presentation Category
Research
Introduction/Context/Diagnosis
Objective: While many manufacturing methods exist, information lacks regarding 3D printed occlusal splint materials. The purpose of this study is to compare 2 body wear properties of 3D printed splint resins. Two commercially available splint resins and a conventional polypropylene material (control) were subject to wear in a chewing simulator. Methods: The 3D printed resins, KEY (KeyPrint® KeySplint Hard®; Keystone Industries) and VERI (VeriSPLINT OS 3D; WhipMix), were printed according to manufacturing criteria and the polypropylene thermoform, FORM (PRO-FORM; Keystone Industries), was excised from a square sample into 10 mm diameter discs with 5 mm height. The discs were embedded in an aluminum housing using an auto-mixed two-part methacrylate ester (Integrity; Dentsply). A total of 18 specimens were prepared (n=6) and subjected to artificial aging in a chewing simulator (CS-4.2/SD Mechatronic/Germany) for 120,000 cycles at 25 °C under a 50 N load with a round, steel tipped 1 mm diameter antagonist. All samples were mapped with a laser scanner (E4D; 3Shape) before and after mechanical aging. Volumetric wear data was quantified using Geomagic 2023.1 (3D Systems) and analyzed using single factor ANOVA with Tukey post-hoc tests (����꞊0.05). The null hypothesis is that all materials exhibit the same wear. Results: VERI presented with the lowest average volumetric loss due to wear (0.5736 ±0.33 mm3) followed by FORM (0.9473 ±0.18 mm3) and then KEY (1.838 ±0.42 mm3). Single factor ANOVA yielded a p-value=0.00002 with Tukey HSD determining no statistically significant difference between VERI and FORM. Among the commercially available 3D printed resins tested in this study, the data suggests VERI had significantly lower wear patterns. Conclusion: The null hypothesis was rejected because the VeriSPLINT OS 3D and the PRO-FORM splint material exhibited statistically significant lower volumetric wear than the KeySplint Hard.
Location
Arthur A Dugoni School of Dentistry, 155 5th St, San Francisco, CA 94103, USA
Format
Presentation
In-vitro Wear Analysis of 3-Dimensionally Printed Splint Material
Arthur A Dugoni School of Dentistry, 155 5th St, San Francisco, CA 94103, USA
Objective: While many manufacturing methods exist, information lacks regarding 3D printed occlusal splint materials. The purpose of this study is to compare 2 body wear properties of 3D printed splint resins. Two commercially available splint resins and a conventional polypropylene material (control) were subject to wear in a chewing simulator. Methods: The 3D printed resins, KEY (KeyPrint® KeySplint Hard®; Keystone Industries) and VERI (VeriSPLINT OS 3D; WhipMix), were printed according to manufacturing criteria and the polypropylene thermoform, FORM (PRO-FORM; Keystone Industries), was excised from a square sample into 10 mm diameter discs with 5 mm height. The discs were embedded in an aluminum housing using an auto-mixed two-part methacrylate ester (Integrity; Dentsply). A total of 18 specimens were prepared (n=6) and subjected to artificial aging in a chewing simulator (CS-4.2/SD Mechatronic/Germany) for 120,000 cycles at 25 °C under a 50 N load with a round, steel tipped 1 mm diameter antagonist. All samples were mapped with a laser scanner (E4D; 3Shape) before and after mechanical aging. Volumetric wear data was quantified using Geomagic 2023.1 (3D Systems) and analyzed using single factor ANOVA with Tukey post-hoc tests (����꞊0.05). The null hypothesis is that all materials exhibit the same wear. Results: VERI presented with the lowest average volumetric loss due to wear (0.5736 ±0.33 mm3) followed by FORM (0.9473 ±0.18 mm3) and then KEY (1.838 ±0.42 mm3). Single factor ANOVA yielded a p-value=0.00002 with Tukey HSD determining no statistically significant difference between VERI and FORM. Among the commercially available 3D printed resins tested in this study, the data suggests VERI had significantly lower wear patterns. Conclusion: The null hypothesis was rejected because the VeriSPLINT OS 3D and the PRO-FORM splint material exhibited statistically significant lower volumetric wear than the KeySplint Hard.
Comments/Acknowledgements
Presentation Category: Research