IADR Abstract Archives
Effect of Delayed Post-Processing on Accuracy of 3DP Dental Prostheses
Objectives: To compare the accuracy of 3DP surgical guides after delayed post processing.
Methods: Two types of surgical guide models with implant keyholes were designed and 3D printed using Asiga MAX UV 385. Rodin Surgical Guide and Keystone KeySplint KeyGuide resin were used. The surgical guides were post-processed according to manufacture instructions. The control group was immediate post-print finishing. Two experimental groups included an 8-hour treatment delay, and a 24-hour treatment delay. For Rodin, the specimens were washed in an ultrasonic bath with 99% isopropyl alcohol for 5 minutes, then another ultrasonic bath with fresh 99% IPA for another 5 minutes. The supports were then removed and the surgical guides were cured at 5000 flash cycles using the Otoflash device. For KeyGuide, the isopropyl baths were 3 minutes each, and the guides were cured at 2000 flash cycles. All guides were scanned using the Dentsply-Sirona inEos X5 Scanner and exported STL files were superimposed with original STL files to inspect the deviation, RMS, in-tolerance percentage, and diameter deviation using Geomagic Control X 2023. ANOVA analysis was used to compare the difference between groups.
Results: No significant different RMS was found between the two post-treatment groups and control group (p =0.16) and between Model A and Model C (p=0.43). Deviation RMS values of Rodin (167 µm) were significantly higher than Keyguide (77.4 µm). Keyguide exhibited significantly higher in-tolerance than Rodin at 100 um threshold (p<0.001), while no significant in-tolerance at 200 µm threshold (p=0.30). Model A showed significantly higher diameter and angular deviation in the keyhole than Model C.
Conclusions: Within the limitation of this study, delayed processes have no significant impact on the accuracy of the surgical guides. Under 200 µm threshold, there was no significant difference in accuracy for both tested materials.
Methods: Two types of surgical guide models with implant keyholes were designed and 3D printed using Asiga MAX UV 385. Rodin Surgical Guide and Keystone KeySplint KeyGuide resin were used. The surgical guides were post-processed according to manufacture instructions. The control group was immediate post-print finishing. Two experimental groups included an 8-hour treatment delay, and a 24-hour treatment delay. For Rodin, the specimens were washed in an ultrasonic bath with 99% isopropyl alcohol for 5 minutes, then another ultrasonic bath with fresh 99% IPA for another 5 minutes. The supports were then removed and the surgical guides were cured at 5000 flash cycles using the Otoflash device. For KeyGuide, the isopropyl baths were 3 minutes each, and the guides were cured at 2000 flash cycles. All guides were scanned using the Dentsply-Sirona inEos X5 Scanner and exported STL files were superimposed with original STL files to inspect the deviation, RMS, in-tolerance percentage, and diameter deviation using Geomagic Control X 2023. ANOVA analysis was used to compare the difference between groups.
Results: No significant different RMS was found between the two post-treatment groups and control group (p =0.16) and between Model A and Model C (p=0.43). Deviation RMS values of Rodin (167 µm) were significantly higher than Keyguide (77.4 µm). Keyguide exhibited significantly higher in-tolerance than Rodin at 100 um threshold (p<0.001), while no significant in-tolerance at 200 µm threshold (p=0.30). Model A showed significantly higher diameter and angular deviation in the keyhole than Model C.
Conclusions: Within the limitation of this study, delayed processes have no significant impact on the accuracy of the surgical guides. Under 200 µm threshold, there was no significant difference in accuracy for both tested materials.
4009397_File000000.jpg
4009397_File000001.jpg