F G Mangano1, O Admakin1, M Bonacina2, F Biaggini3, D Farronato4, H Lerner5. 1. Department of Prevention and Communal Dentistry, Sechenov First Moscow State Medical University, 119992 Moscow, Russia. 2. Ars and Technology, 24039 Sotto il Monte Giovanni XXIII (BG), Italy. 3. Biaggini Medical Devices, 19021 Arcola (SP), Italy. 4. Department of Medicine and Surgery, School of Dentistry, University of Insubria, 21100 Varese, Italy. 5. Academic Teaching and Research Institution of Johann Wolfgang Goethe University, 60323 Frankfurt am Main, Germany.
Abstract
PURPOSE: To compare the accuracy of 6 desktop 3D printers in dentistry. METHODS: A parallelepiped (PP) with known geometry and holes of different diameters was designed and printed with 6 desktop 3D printers (Sheraprint 40®; Solflex 350®; Form 2®; MoonRay D75®; Vida HD®; XFAB 2000®). For each printer, 9 PPs were printed with proprietary materials; these PPs were not cured and underwent dimensional analysis by optical microscopy and precision probing. A file representative of a dentate model (DM) was also printed with the aforementioned printers. For each printer, 3 DMs were printed with the proprietary materials. These DMs were cured and after 1 month, scanned with a desktop scanner and superimposed on the virtual reference model, to investigate trueness. RESULTS: Dimensional analysis by optical microscopy and precision probing highlighted the reliability of the 3D printed models; errors were compatible with clinical use. However, both linear and diameter measurements revealed statistically significant differences between the machines. The trueness of the DMs 1 month after printing was low, suggesting that they underwent dimensional contraction over time, albeit with differences between the printers. CONCLUSIONS: The 3D printed models showed acceptable accuracy, although statistically significant differences were found among them. Copyright
PURPOSE: To compare the accuracy of 6 desktop 3D printers in dentistry. METHODS: A parallelepiped (PP) with known geometry and holes of different diameters was designed and printed with 6 desktop 3D printers (Sheraprint 40®; Solflex 350®; Form 2®; MoonRay D75®; Vida HD®; XFAB 2000®). For each printer, 9 PPs were printed with proprietary materials; these PPs were not cured and underwent dimensional analysis by optical microscopy and precision probing. A file representative of a dentate model (DM) was also printed with the aforementioned printers. For each printer, 3 DMs were printed with the proprietary materials. These DMs were cured and after 1 month, scanned with a desktop scanner and superimposed on the virtual reference model, to investigate trueness. RESULTS: Dimensional analysis by optical microscopy and precision probing highlighted the reliability of the 3D printed models; errors were compatible with clinical use. However, both linear and diameter measurements revealed statistically significant differences between the machines. The trueness of the DMs 1 month after printing was low, suggesting that they underwent dimensional contraction over time, albeit with differences between the printers. CONCLUSIONS: The 3D printed models showed acceptable accuracy, although statistically significant differences were found among them. Copyright